JP6752063B2 - Attached freezing tube and its mounting method - Google Patents

Description

The present invention relates to a sticking freezing pipe suitable for using a liquefied gas (for example, carbon dioxide: CO ₂ ) for freezing the ground as a circulating refrigerant, and a ground freezing method using the sticking freezing pipe.

The ground freezing method is used, for example, for starting and reaching parts of shield excavators, connecting horizontal shafts between tunnels, and underground connection of tunnels and shafts. In the prior art of the ground freezing method, in order to freeze the ground in contact with a structure such as a shield excavator or a segment for tunnel lining, a sticking freezing pipe is installed on the inner surface of the structure, and a refrigerant is used in the sticking freezing pipe. A certain brine is circulated.
Here, since the structure to which the pasted freezing pipe is attached is generally made of steel and the attached frozen pipe is also made of steel, the pasting and joining of the two is performed by welding. The brine-type pasted freezing pipe 30 used in the prior art usually has the structure shown in FIG. 26, and the brine supply pipe 32 and the return pipe 33 are connected to the freezing pipe main body 31 made of a square steel pipe. Arrow F in FIG. 26 indicates the direction of brine flow.

As shown in FIG. 27, the shield machine 50 has a bulkhead 51 that can withstand the soil water pressure on the front surface of the tunnel, and a hollow cylindrical rear body 52, and the segment is assembled by the hollow cylindrical rear body 52. .. The arrow D in FIG. 27 indicates the digging direction.
In the case of the underground joining work of the shield machine, as shown in FIG. 28, the radiation freezing pipe 35 for installing the freezing pipe radially from the boring hole from the inside of the shield machine 50 is arranged, and the cylindrical hollow of the shield machine 50 is provided. A sticking freezing tube 36 is stuck to the rear body portion 52 of the shape. Reference numeral FS in FIG. 28 indicates the ground (frozen soil) frozen by the refrigerant flowing through the radiation freezing pipe 35 and the sticking freezing pipe 36.

As shown in FIG. 26, the bottom surface of the sticking freezing tube 31 is flat. On the other hand, the inner wall surface of the tunnel is cylindrical or circular, and the inner peripheral surface of the steel segment for tunnel lining is formed in a part of the cylindrical surface or in an arc shape. When joined to a wall surface, a space is generally formed on the joined surface.
Since air has high heat insulating properties, if such a space is formed, the heat conduction efficiency between the attached freezing pipe and the ground on the back side of the structure deteriorates. Therefore, in the conventional freezing method using a pasted freezing pipe, a mortar or the like having good adhesion is sandwiched so that a heat insulating layer (space at the joint surface) due to air or the like does not occur on the joint surface between the pasted frozen pipe and the structure. It has a compact structure.

Here, it is desirable that the attached freezing pipe has a structure that can be quickly removed when the ground freezes and the construction work is completed.
However, in the attached freezing pipe used for freezing the ground on the opposite side (back surface) of the structure, as described above, in order to efficiently transfer the cold heat of the brine, the attached freezing pipe and the structure A mortar or the like is interposed on the joint surface of the body to prevent the formation of a heat insulating layer due to gaps, that is, air.
Therefore, when removing the pasted freezing tube, there is a problem that a large amount of labor is required to remove the mortar or the like because it adheres to the surface of the structure.

In addition to that, as described above, in the conventional freezing method using a pasted freezing pipe, the pasted frozen pipe is often welded to the structure.
However, the space inside the tunnel or the internal space of the shield machine is narrow, and welding work in the narrow space is very difficult. At the same time, since various oils such as machine oil and tail seal filler are present inside the shield machine, there is a problem that oil smoke is generated when welding work is performed and the inside of the tunnel is contaminated.
On the other hand, a technique for attaching the attached freezing tube to the structure by a method other than welding is desired, but a technique capable of responding to such a request has not yet been proposed.

As another conventional technique, there is a freezing method applied to an existing small-scale underground structure such as a manhole (see, for example, Patent Document 1), but it does not solve various problems related to the attached freezing pipe as described above.

Japanese Unexamined Patent Publication No. 2010-265631

The present invention has been proposed in view of the above-mentioned problems of the prior art, and is a freezing tube that can be easily brought into close contact with a structure and can be easily removed, and a freezing tube. The purpose is to provide a mounting method.

The freezing pipe (1) of the present invention has a flow path through which a secondary refrigerant flows, and the secondary refrigerant is, for example, a liquefied gas.
It has a flat plate-shaped member (1A: microchannel) provided with a plurality of minute refrigerant flow paths as a flow path through which the secondary refrigerant directly flows.
Flat plate member (1A) has a flexible, formed of a material having thermal properties that are involved in the absorption of the cold heat dissipation and heat (e.g. aluminum), the body portion after the structure (e.g., shield machine or Attached to the tunnel lining segment)
It is characterized by being provided with a member (6: high conductive sheet) that is flexible and has thermal conductivity in order to adhere to a structure (for example, a rear body portion of a shield machine or a segment for tunnel lining).

In the freezing pipe (1) of the present invention, the flat plate-shaped member (1A: microchannel) is joined with a dispersion socket (1B) provided at one end with a space for communicating with the secondary refrigerant supply system. It is preferable that a collecting socket (1C) provided with a space for communicating with the return system of the secondary refrigerant is joined at the end.
The freezing tube (1) of the present invention preferably uses carbon dioxide as the secondary refrigerant.

The freezing pipe (1) of the present invention preferably has a negative pressure mechanism (10: vacuum suction mechanism) in order to adhere to a structure (for example, the rear body of a shield machine or a segment for tunnel lining). ..
In that case, the negative pressure mechanism has a pipeline (spatial VS) extending in parallel with the flat plate-shaped member (1A: microchannel), and the pipeline communicates with the negative pressure supply source. preferable.
Further, the negative pressure mechanism has a pipeline (space VS) extending in parallel with the flat plate-shaped member (1A: microchannel), and the pipeline communicates with a supply source of a thermal fluid (for example, hot water). It is preferable to have.
Alternatively, in the freezing pipe (1) of the present invention, a mounting jig (11: vacuum type flat coolant) having a negative pressure mechanism for being in close contact with a structure (for example, the rear body of a shield machine or a segment for tunnel lining). It is preferable that it is configured so that it can be surrounded by a pressing device).

Further, in the freezing pipe (1) of the present invention, a mounting jig (for example, a magnet) having a mechanism (for example, a magnet) for emitting magnetic lines of force in order to adhere to a steel structure (for example, a rear body of a shield machine or a segment for tunnel lining) It is preferable that the structure is such that it can be surrounded by 12).

Further, in the present invention, it is preferable to fix the structure to the structure by using the fixing fastener (7).
In addition, the freezing tube (1) of the present invention can be covered with a heat insulating material (8).

The method for attaching the freezing pipe (1) of the present invention has a flat plate-like member (1A: microchannel) provided with a plurality of minute refrigerant flow paths as a flow path through which the secondary refrigerant directly flows, and is a flat plate. having Jo member (1A) is flexible, cryotubes formed of a material having thermal properties that are involved in the absorption of the cold heat dissipation and heat (e.g. aluminum) (1) the structure (for example, after the shield machine In the mounting method to be attached to the body or tunnel lining segment)
The cryotubes (1) is negative pressure mechanism: has a (10 Vacuum suction mechanism), a member having a flexible and thermally conductive (6: highly conductive sheet) freezing tube (1) and the structure The freezing tube (1) is placed in a predetermined position, and the negative pressure mechanism (10) is operated to temporarily fasten the freezing tube (1).
It is characterized in that the temporarily fastened freezing tube (1) is fixed to the structure with a fixing fastener (7).

Alternatively, the method of attaching the freezing pipe (1) of the present invention has a flat plate-shaped member (1A: microchannel) provided with a plurality of minute refrigerant flow paths as a flow path through which the secondary refrigerant directly flows, and is flat. has a plate-like member (1A) is flexible, cryotubes formed of a material having thermal properties that are involved in the absorption of the cold heat dissipation and heat (e.g. aluminum) (1) the structure (e.g., of the shield machine In the mounting method to attach to the rear body or tunnel lining segment)
Mounting jig having a negative pressure mechanism: surrounding said cryotubes by (11 Vacuum type flat coolant pressing device) (1), a member having a flexible and thermally conductive: freeze tube (6 highly conductive sheet) A mounting jig (11) having a negative pressure mechanism is placed at a predetermined position in a state of being interposed between (1) and the structure, and the negative pressure mechanism is operated to press the freezing tube (1) against the structure. Temporarily fasten
It is characterized in that the vicinity of a portion of the temporarily fastened freezing tube (1) surrounded by the mounting jig (11) is fixed to the structure with a fixing fastener (7).
Here, the negative pressure mechanism has a pipeline (spatial VS) extending in parallel with the flat plate-shaped member (1A: microchannel), and the pipeline (VS) supplies a thermal fluid (for example, hot water). When it communicates with the source and it is no longer necessary to freeze the ground, it is preferable to flow a hot fluid (for example, hot water) through the pipe line (VS).

Further, the method of attaching the freezing pipe (1) of the present invention has a flat plate-shaped member (1A: microchannel) provided with a plurality of minute refrigerant flow paths as a flow path through which the secondary refrigerant directly flows, and is flat. has a plate-like member (1A) is flexible, it cryotubes formed of a material having thermal properties that are involved in the absorption of the cold heat dissipation and heat (e.g. aluminum) (1) an iron structure (for example, the shield machine In the mounting method to attach to the rear body or steel segment)
The cryotubes with the mounting jig (12) having a mechanism for releasing the magnetic field lines (e.g., magnet) (1) surrounds a member having a flexible and thermally conductive (6: highly conductive sheet) freezing tube (1 ) And the iron structure, the freezing pipe (1) is pressed against the iron structure by the mounting jig (12) and temporarily fastened.
It is characterized in that the vicinity of a portion of the temporarily fastened freezing tube (1) surrounded by the mounting jig (12) is fixed to the structure with a fixing fastener (7).

According to the present invention having the above-described configuration, a freezing tube is provided with a flexible and heat conductive member (6: high conductive sheet) interposed between the freezing tube (1) and the structure. The freezing tube (1) is attached to the structure by pressing the freezing tube (1) against the structure by the negative pressure mechanism (10: vacuum suction mechanism) provided in (1) or the mounting jigs (11, 12). be able to.
Then, by interposing a flexible member (6: highly conductive sheet) between the freezing tube (1) and the structure, air is provided between the freezing tube (1) and the structure. The cold heat (explicit heat and latent heat) possessed by the refrigerant (secondary refrigerant: for example, liquid carbon dioxide) flowing through the freezing tube (1) should be frozen through the structure without forming the heat insulating layer of the above. Efficiently transmitted to the ground.
Further, even if there is unevenness (or unevenness) on the surface of the structure, the flexible and heat conductive member (6: high conductivity sheet) is deformed to absorb the unevenness (or unevenness). Therefore, a gap, that is, a heat insulating layer due to air is not formed.

According to the present invention, a freezing tube (1) having a negative pressure mechanism (10) is used, or a mounting jig (11: vacuum type flat cooling material pressing device) or a magnetic field line having a negative pressure mechanism is used as a mounting jig. The freezing tube (1) is attached to the structure using a mounting jig (12) having a mechanism (for example, a magnet) for discharging the freezing tube, and then fixed to the structure with a fixing fastener (7), so that the freezing method is completed. When the freezing tube (1) is removed, the freezing tube (1) can be removed by removing the fixing fastener (7). Alternatively, after removing the fixing fastener (7), the supply of negative pressure is cut off and a freezing tube (1) having a negative pressure mechanism (10) or a mounting jig (11) having a negative pressure mechanism is removed from the structure. The freezing tube (1) can be removed by removing or removing the mounting jig (12) having a mechanism (for example, a magnet) that emits magnetic lines of force from the structure. The work of removing the adhered mortar from the structure in the prior art is unnecessary.
Therefore, according to the present invention, the freezing tube (1) can be removed quickly and easily.

In the present invention, the negative pressure mechanism has a pipeline (space VS) extending in parallel with the flat plate-shaped member (1A: microchannel), and the pipeline (VS) is a hot fluid (for example, hot water). If it communicates with the supply source, when it becomes unnecessary to freeze the ground, a hot fluid (for example, hot water) is allowed to flow through the pipeline (VS) to form a plate-shaped member (1A: microchannel) and a structure. The space between the inner surface of the steel material (for example, 50A) is heated, and the flat plate-shaped member (1A: microchannel) is easily peeled off (removed) from the structure (for example, the inner surface of the steel material 50A) to complete the freezing method. Can be done.

Here, in the conventional freezing method using a pasted freezing pipe, if the freezing operation is performed with the square steel pipe exposed to the air on the surface other than the joint surface of the pasted frozen pipe with the structure, the inside of the tunnel mine. In a high humidity environment such as, frost is formed on the pipe surface. That is, in the prior art, a part of the cold heat possessed by the refrigerant (brine) is not used for freezing the ground, but is used for forming frost, so that the freezing efficiency is lowered accordingly.
On the other hand, in the freezing tube (1) of the present invention, if the freezing tube (1) is covered with the heat insulating material (8), frost is not generated in the freezing tube (1) and the cold heat (sensible heat) of the secondary refrigerant is generated. And latent heat) is not used to form frost, and all cold heat is used to freeze the ground, improving freezing efficiency.

It is explanatory drawing of the sticking freezing tube used in embodiment of this invention. It is explanatory drawing of the state which attached the sticking freezing tube shown in FIG. 1 to a steel segment. It is explanatory drawing of the sticking freezing tube used in embodiment of this invention. It is explanatory drawing which shows the state which attached the sticking freezing tube other than those shown in FIGS. 1 and 3. It is explanatory drawing of the aspect which carries the sticking freezing tube in FIG. FIG. 5 is a partially enlarged cross-sectional explanatory view showing a main part in a mode in which a pasted freezing tube other than those shown in FIGS. 1, 3 and 4 is arranged. It is a partially enlarged cross-sectional explanatory view which shows the main part in the aspect which arranged the attached freezing tube other than those shown in FIG. 1, FIG. 3, FIG. 4, FIG. It is explanatory drawing of the aspect which carries the sticking freezing tube in FIG. It is explanatory drawing which shows 1st Embodiment of this invention, (A) is the front sectional view, (B) is the B arrow view in (A). It is a perspective view which shows the state which the air vacuum connection block, the refrigerant supply socket, and the refrigerant return socket are attached to the micro channel of 1st Embodiment. It is a front sectional view explaining the action effect of the high heat conduction adhesion sheet in 1st Embodiment. It is a front sectional view which shows the state which the vacuum hole is temporarily closed with the vacuum hole temporary closing tape. It is explanatory perspective view which shows the state which partially peeled off the vacuum hole temporary closing tape which temporarily closes a vacuum hole. FIG. 5 is an explanatory perspective view showing a state in which the attached freezing tube is fixed to a structure in the first embodiment. It is a front sectional view which shows the 2nd Embodiment of this invention. It is F15 arrow view of FIG. FIG. 15 is a cross-sectional view (longitudinal cross-sectional view) in the direction of arrow F15 in FIG. It is a front sectional view which shows the 3rd Embodiment of this invention. It is explanatory drawing which shows the outline of the 4th Embodiment of this invention. It is a front sectional view which shows 4th Embodiment. It is a top view which shows the 4th Embodiment. It is a front sectional view which shows the 5th Embodiment of this invention. It is a front sectional view which shows the 6th Embodiment of this invention. It is a partial cross-sectional view which shows the 7th Embodiment of this invention. It is a partial cross-sectional view which shows the modification of the 7th Embodiment of this invention. It is a perspective view which shows the sticking freezing tube which concerns on the prior art. It is explanatory drawing of the shield machine to which the sticking freezing tube is attached. It is explanatory drawing which shows the arrangement of the freezing pipe in the underground joint of a shield machine. It is sectional drawing which shows an example of the sectional shape of the flat plate-like member used in embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the illustrated embodiment, carbon dioxide (CO ₂ ) is used as the secondary refrigerant that circulates in the freezing tube. However, if the boiling point is low enough to supply the cold heat required for the construction of the ground freezing method, it is possible to use liquefied gas other than brine or carbon dioxide.
Prior to the description of the embodiment of the present invention, an embodiment in which the attached freezing tube used in the embodiment of the present invention is attached to the structure will be described with reference to FIGS. 1 to 7.
Here, the structure includes, for example, the rear body of the shield machine, the segment for tunnel lining, the back side of the earth retaining shaft of the shaft, the tunnel or the shield machine, and also includes the existing structure.

The pasted freezing tube 1 of FIG. 1 has a flat flat plate-like structure 1A having a plurality of minute refrigerant flow paths (may be referred to as “microchannel structure” or “microchannel” in the present specification). There is. In FIG. 1, the fluid (refrigerant) flowing in all the minute refrigerant flow paths is configured to flow in one direction. Then, a refrigerant (for example, liquid carbon dioxide) flows inside the minute refrigerant flow path, recovers the heat of the ground (or absorbs the amount of heat held by the ground by the refrigerant), and freezes the ground.
The cross-sectional shape of the microchannel 1A (attached freezing tube 1) is as shown in FIG. 29, a plurality of microchannels A are formed, and the microchannel A has a rectangular cross section. However, the cross-sectional shape of the microchannel A is not limited to a rectangular shape, and may be a cross-sectional shape other than the rectangular shape, for example, a trapezoidal cross-section or a semi-circular cross-section (so-called “kamaboko-shaped cross-section”).

Again, in FIG. 1, the flat plate-like member 1A (microchannel) is made of a material (eg, aluminum) that is lightweight, highly flexible, and has excellent heat dissipation and heat absorption (excellent heat transfer). ing. The microchannel structure does not have a portion corresponding to the outer tube of the double tube, unlike the double tube structure of the conventional freezing tube, and has a function of reciprocating the refrigerant in a single microchannel. Does not have (does not have the function of returning / returning the refrigerant).
The microchannel 1A can be attached to a structure (for example, a steel segment or the like) as a sticking freezing tube in the state shown in FIG.
In the illustrated embodiment, it is also possible to configure the attached freezing pipe to have a function of reciprocating the refrigerant (having a function of returning / returning the refrigerant). For example, it is possible to use a part of a plurality of microchannels of the microchannel as a refrigerant supply path and use the remaining microchannels as a refrigerant return channel.

At one end of the flat plate-shaped member 1A (microchannel), a dispersion socket 1B provided with a space for communicating with a secondary refrigerant supply system (for example, a round tube 2A for supplying refrigerant from a refrigerator on the ground side) is joined. At the other end, a collecting socket 1C provided with a space for communicating with a return system of the secondary refrigerant (for example, a round pipe 2B for returning the refrigerant to the refrigerator on the ground side) is joined.
The arrow F in FIG. 1 indicates the direction of the flow of the refrigerant.

FIG. 2 shows an attachment mode of the attached freezing pipe 1 of FIG. 1, and shows a state in which the attached freezing pipe is attached to the steel segment at a stage before assembling the steel segment at the freezing method construction site. The steel segment is originally arcuate, but in the attached drawings, it may be rectangular as shown in FIG. 2 for simplification of illustration.
The steel segment 40 shown in FIG. 2 has a skin plate 41, a main girder 42, and a segment joint plate 43 adjacent to the ground. Two vertical ribs 44 (partitions) are provided in the space surrounded by the skin plate 41, the main girder 42, and the segment joint plate 43. In order to install the sticking freezing pipe 1 in contact with the skin plate 41 of the steel segment 40, the vertical rib 44 is formed with a space 44A (through hole) in which the sticking freezing pipe 1 is installed (inserted). Then, the sticking freezing tube 1 is attached (integrated) to the steel segment 40 in a state of being inserted into the space 44A in the vertical rib 44.
In the configuration as shown in FIG. 2, since the attached freezing pipe 1 is attached to the steel segment 40, only the piping work for the refrigerant of the round pipes 2A and 2B needs to be performed in the field work in the tunnel mine. .. Reference numeral 2C in FIG. 2 indicates a communication pipe having flexibility for allowing the refrigerant to flow inside by communicating the two adjacent freezing pipes.

When attaching the attached freezing pipe 1 of FIG. 1 to the steel segment 40, as shown in FIG. 3, the attached freezing pipe 1 (three attached freezing pipes 1 in FIG. 3) and the round pipe communicating with the refrigerant supply source are used. The assembly 20 is composed of 2 and the frame 3, the assembly 20 is assembled outside the tunnel pit, and the assembly 20 is pressed against a predetermined position in the steel segment 40 inside the tunnel pit to attach the freezing pipe 1. (3 in FIG. 3) can be attached at a predetermined position on the steel segment 40.
In FIG. 3, the assembly 20 is composed of three sticking freezing pipes 1 having a microchannel 1A, a distributed socket 1B, and a collecting socket 1C, and a supply pipe 2A and a return pipe 2B communicating with a refrigerant supply source. It is assembled by a round tube 2 and a lightweight frame 3 (frames 3A, 3B, 3C). The predetermined position for attaching the three sticking freezing pipes 1 is a position in contact with the skin plate 41 of the steel segment joint 40. The frame 3 and the circular tube 2 are joined and fixed at appropriate positions by a conventionally known method.
By assembling the assembly 20 with the lightweight frame 3 as a support member and installing it at a predetermined position, the round tube 2 and the microchannel 1A (freezing tube 1) having low rigidity can be attached at a predetermined position without being deformed. You can. Then, by integrating the sticking freezing pipe 1, the round pipe 2, and the frame 3 and attaching them to the structure (steel segment) as the assembly 20, the sticking freezing pipe 1 is installed in the structure such as the steel segment 40. The labor of work can be reduced.

When arranging the microchannel 1A, for example, as shown in FIG. 4, a distributed socket 1B is brazed to one end of a long flat microchannel 1A, and a collecting socket 1C is brazed to the other end (at a factory or a construction site). Then, the long microchannel 1A can be rolled and transported in the tunnel as shown in FIG.
Then, when the sticking freezing tube 1 is attached in the shield machine 50, as shown in FIG. 4, the roll-wound freezing tube 1 is unwound from the rolled state and adjusted to the curvature of the inner surface of the shield machine 50. While returning to a gentle curve, it can be expanded in the direction of the tunnel axis, and as a so-called "spiral structure", the freezing tube 1 to which the spiral structure is attached can be attached in close contact with the inner surface of the shield machine 50. In FIG. 4, two freezing tubes 1 are attached in the axial direction of the tunnel.

As shown in FIG. 4, when the long freezing tube 1 is installed according to the curvature of the inner surface of the shield machine 50, the flat plate-shaped member 1A (microchannel) used in the illustrated embodiment is made of, for example, aluminum. It has excellent thermal conductivity, is lightweight, and is highly flexible, so workability is good.
Although not shown, a ring-shaped sticking freezing tube may be installed on the inner wall surface of the steel segment joined in a ring shape along the shape of the hollow cylindrical rear body portion of the shield machine 50.
As shown in FIG. 4, if the long microchannel 1A is attached to the structure as it is long, the labor of attaching the sticking freezing tube 1 to the structure is greatly reduced.

The long microchannel 1A can be installed in a structure (for example, the rear body of a shield machine) in the manner shown in FIG.
In FIG. 5, a long microchannel 1A (attached freezing pipe 1) having a distributed socket 1B and a collecting socket 1C brazed on both ends is rolled and loaded on an underground transport carriage 4. The transport carriage 4 is run on the track 5 in the mine, and the roll-wound microchannel 1A (attached freezing pipe 1) is transported to a predetermined installation position in the shield machine 50.
At a predetermined installation position, the roll-wound microchannel 1A is unwound from the roll-wound state and extended spirally in a state where the roll-wound microchannel 1A is unwound from the transport carriage 4 or placed on the transport carriage 4 (FIG. 4), and attach it to the inner surface of the shield machine 50.

When a long microchannel is attached to a segment, as shown in FIG. 6, a through hole 43A is formed in the joint plate 43 of each of the segments 40-1, 40-2, 40-3, ... If the long microchannel 1A is inserted through the 43A, the long microchannel 1A can be installed in contact with the skin plate 41 even if there is a joint plate 43 (protrusions such as a main girder and a vertical rib). Can be done.
In FIG. 6, reference numeral 43B is a sealing member that prevents the intrusion of groundwater from the ground side.

Alternatively, as shown in FIG. 7, the long microchannel 1A is appropriately bent without forming a through hole in the joint plate (or protrusions such as vertical ribs), and the joint plate 43 (main girder, vertical ribs, etc.) is formed. The long microchannel 1A can be attached to the segment even if it is arranged so as to get over the protrusion).
As described above, since the microchannel is made of aluminum and is highly flexible, it is easy to bend and arrange it as shown in FIG.
Here, when the microchannel is extended in the segment circumferential direction (tunnel circumferential direction), the joint plate 43 and / or the vertical rib 44 is overcome, or the through port of the joint plate 43 and / or the vertical rib 44. Insert into. On the other hand, when the microchannel extends in the direction of the tunnel axis, the main girder (not shown) is overcome or inserted into the through hole formed in the main girder.

As shown in FIG. 7, when the long microchannel 1A is installed on the structure (for example, the rear body of the shield machine) so as to overcome the joint plate 43 (or the main girder (not shown)), as shown in FIG. It can be carried out in various manners.
Similar to that shown in FIG. 5, in FIG. 7, at the microchannel installation position, the roll-wound microchannel 1A (attached freezing tube 1) is lowered from the transport trolley 4 or placed on the transport trolley 4. The microchannel 1A (attached freezing tube 1) is unwound from the rolled state to the spirally extending state, and attached to the inner surface of the shield machine 50.

Here, as shown in FIG. 8, the microchannel 1A is preliminarily (joint plate 43 or) so that the microchannel 1A easily overcomes the joint plate 43 (or the main girder (not shown) and extends (see FIG. 7). It is rolled in a bent state (so that it can easily get over the main girder). In that respect, FIG. 8 differs from the embodiment shown in FIG.
By pre-bending the microchannel 1A so that it can easily get over the joint plate 43 or the main girder, the microchannel 1A extends over the joint plate 43 (or the main girder not shown) as shown in FIG. The efficiency of the work of pasting as if it exists is improved.

Next, an embodiment of the present invention will be described with reference to FIGS. 9 to 25.
First, the first embodiment will be described with reference to FIGS. 9 to 14.
When a long freezing tube 1A is installed according to the curvature of the inner surface of the shield machine 50, the micro channel 1A is placed on the inner wall surface of the rear body of the shield machine 50 in order to bring the micro channel 1A into close contact with the inner wall surface of the rear body of the shield machine 50. It is necessary to attach the microchannel 1A in place while pressing it.
At that time, if a gap (a heat insulating layer such as air) is formed between the microchannel 1A and the inner wall surface of the rear body of the shield machine 50, it should be frozen from the secondary refrigerant (liquid phase carbon dioxide). It reduces the conductivity of cold heat to the ground (inhibits thermal conductivity). In order to prevent such a decrease in thermal conductivity, it is necessary to interpose a material having high thermal conductivity between the metal surface of the outer body (steel shell) of the shield machine 50 and the metal surface of the microchannel 1A.

In the first embodiment of FIG. 9, the microchannel 1A is attached at a predetermined position, and a gap (heat insulating layer such as air) is formed between the microchannel 1A and the inner wall surface 50A of the rear body of the shield machine 50. Space VS (vacuum space) is provided at both ends of the micro channel 1A, and the space VS (vacuum space) is communicated with a vacuum pump (not shown) to suck air, thereby sucking air. A negative pressure is generated on the bottom surface of the channel 1A (the surface in contact with the inner wall surface 50A of the rear body of the shield machine 50).

In FIG. 9A, the freezing tube 1 in which the dispersion socket 1B (not shown) and the collective socket 1C (not shown) are joined to the flat plate-shaped member 1A (microchannel) having the plurality of microchannels 1AA is A negative pressure mechanism 10 (vacuum suction mechanism) is integrally provided.
The vacuum adsorption mechanism 10 integrally attached to the microchannel 1A (freezing pipe 1) has a main body portion 10A provided at both ends of the microchannel 1A along the extending direction of the refrigerant flow path, and is inside the main body portion 10A. A vacuum space VS is formed in.

As shown in FIG. 9B, a plurality of vacuum holes 10H (drill holes) extend through the refrigerant flow path at the bottom of the main body 10A at both ends of the microchannel 1A (on the inner wall surface 50A side of the rear body of the shield machine 50). It is formed at regular intervals in the existing direction (vertical direction in FIG. 9B).
In FIG. 9A, a highly heat conductive close contact sheet 6 that is flexible and has good thermal conductivity is attached to the bottom surface of the microchannel 1A (on the inner wall surface 50A side of the rear body of the shield machine 50). In other words, the high thermal conductive contact sheet 6 is interposed between the microchannel 1A and the inner wall surface 50A of the rear body of the shield machine 50.
Further, as shown in FIG. 9B, an air flow blocking sheet 9 is provided on the bottom of the main body 10A of the vacuum suction mechanism 10 attached to both ends of the microchannel 1A (on the inner wall surface 50A side of the rear body of the shield machine 50). Is provided. The thickness and elasticity of the air flow blocking sheet 9 are about the same as those of the high thermal conductive contact sheet 6.

When the vacuum pump (not shown) is operated, the air in the vacuum space VS is sucked, and the vacuum holes 10H (drilled holes) formed at regular intervals on the bottom surface of the main body 10A are extended to the region below the bottom surface of the microchannel. The existing air is sucked (arrow G), and the microchannel 1A is pressed against the inner wall surface 50A of the rear body of the shield machine 50.
As described above, the high thermal conductive contact sheet 6 is attached to the bottom surface of the microchannel 1A, and since the high thermal conductive contact sheet 6 is highly flexible, the dimensions in the thickness direction are variable, and the microchannel 1A and the microchannel 1A The inner peripheral surface 50A of the outer body of the shield machine (steel shell) is brought into close contact with the high heat conductive contact sheet 6.

Since the microchannel 1A and the inner peripheral surface 50A of the shield machine outer body (steel shell) are in close contact with each other via the high thermal conductive contact sheet 6, the microchannel 1A and the inner peripheral surface 50A of the shield machine outer body (steel shell) are in close contact with each other. It is prevented that a gap is formed in the space of. At the same time, since the high thermal conductivity contact sheet 6 has good thermal conductivity, the cold heat possessed by the secondary refrigerant flowing through the minute flow path in the microchannel 1A is efficiently transferred to the outer body (steel shell) of the shield machine. To.
Further, since the air flow blocking sheet 9 is provided on the bottom surface of the main body portion 10A of the vacuum suction mechanism 10 (on the inner wall surface 50A side of the rear body portion of the shield machine 50), the region below the bottom surface of the microchannel 1A from the vacuum hole 10H. When sucking the air, the air is blocked from flowing from the space outside the microchannel 1A in the left-right direction (in FIG. 9) to enhance the above-mentioned air suction effect.

The vacuum space VS in FIG. 9 communicates with the air vacuum connection block 10B and the air vacuum end block 10C shown in FIG. 10, and the air vacuum connection block 10B communicates with a vacuum pump (not shown) via a pipe 21 (round pipe). doing.
That is, the air in the vacuum space VS (of the vacuum suction mechanism 10) of the microchannel 1A is sucked by a vacuum pump (not shown) through the air vacuum connection block 10B and the air pipe 21 (round pipe).

In FIG. 10, each of the pair of main body portions 10A and 10A having the vacuum space VS (main body portions 10A at the left and right ends of the microchannel 1A in FIG. 9) is air vacuumed at one end in the longitudinal direction (approximately the left and right direction in FIG. 10). It is connected to the connection block 10B and the other end is connected to the air vacuum termination block 10C. The end of the air vacuum termination block 10C opposite to the connection with the main body 10A is closed.
When the vacuum pump (not shown) was operated, the air in the vacuum space VS and the air existing in the region below the bottom surface of the microchannel 1A (air sucked from the vacuum hole 10H: see FIG. 9) were sucked and sucked. The air is sucked into the vacuum pump via the vacuum space VS, the air vacuum connection block 10B, and the air pipe 21 (round pipe). The arrow G in FIG. 10 indicates the direction of the flow of the sucked air.

Further, in FIG. 10, the microchannel 1A is connected to the refrigerant supply socket 1B and the refrigerant return socket 1C. The refrigerant supply socket 1B and the refrigerant return socket 1C communicate with a refrigerator (not shown) via the refrigerant supply pipe 2A and the refrigerant return pipe 2B.
Secondary refrigerant is supplied to the microchannel 1A from a refrigerator (not shown) via a refrigerant supply pipe 2A and a refrigerant supply socket 1B, and for example, a secondary refrigerant that exchanges heat with the ground outside the outer body of the shield machine is exchanged. The refrigerant is returned to the refrigerator on the ground side (not shown) via the microchannel 1A, the refrigerant return socket 1C, and the refrigerant return pipe 2B.

In FIG. 11, which shows a state in which the freezing tube 1A shown in FIG. 9 is attached to the inner peripheral surface 50A of the rear body of the shield machine 50 to operate the vacuum pump, the high heat conductive contact sheet 6 provided below the microchannel 1A is deformed. As a result, the non-landing existing on the inner peripheral surface 50A of the rear body portion (steel shell) of the shield machine 50 is absorbed. In other words, by interposing the high thermal conductive contact sheet 6, the microchannel 1A can be brought into close contact with the inner peripheral surface 50A of the rear body (steel shell) of the shield machine 50 having unevenness or unevenness. .. As a result, the cold heat possessed by the secondary refrigerant flowing through the microchannel 1A is efficiently transferred to the ground to be frozen via the structure (for example, the steel shell rear body of the shield machine 50).
Although not shown, the attached freezing pipe with a vacuum adsorption mechanism shown in FIGS. 9 to 11 is provided not only in the inner wall surface 50A of the rear body of the shield machine 50 but also in a steel segment (or a synthetic segment containing concrete as a composition). It is also possible to place it.

Here, in the attached freezing pipe with the vacuum adsorption mechanism of FIGS. 9 to 11, since the vacuum hole 10H is open over the entire length of the flat coolant 1A (microchannel), when the vacuum pump (not shown) is operated, Negative pressure is generated over the entire length of the freezing tube 1, and the freezing tube 1 adheres to the mating side (shield machine 50 side). Therefore, the positioning work of the freezing tube 1 is difficult.
On the other hand, as shown in FIG. 12, if the temporary closing tape 13 for temporarily closing the vacuum hole 10H is attached along the length direction of the micro channel 1A (the direction perpendicular to the paper surface of FIG. 12), the micro The temporary closing tape 13 at the portion where the channel is positioned can be peeled off, and the suction force from the vacuum hole 10H can be applied only to the portion from which the temporary closing tape 13 has been peeled off.

In FIG. 13, only a part of the vacuum hole temporary closing tape 13 attached by closing the vacuum hole 10H is peeled off in the length direction of the micro channel 1A, and vacuum suction is activated to bring the vacuum hole temporary closing into close contact (vacuum hole temporary closing). Part where the tape 13 is peeled off: Area indicated by reference numeral E1: Area where suction force acts) and part where vacuum suction does not operate (Part where the vacuum hole temporary closing tape 13 is not peeled off: Area indicated by range E2: Suction It shows a state in which a region where force does not act) coexists.
In the positioning work of the freezing tube 1, at the start of the work, the temporary closing tape 13 is attached to all the vacuum holes 10H, and the freezing tube 1 is placed from one end (the left end of the microchannel 1A in FIG. 13) toward the other end ( (Arrow E direction) When positioning with respect to the shield machine side (structure side), the temporary closing tape 13 may be sequentially peeled off from the vacuum hole 10H for which positioning has been completed, and suction of that portion may be activated. ..

The vacuum suction mechanism 10 in the first embodiment is provided for temporary bonding when the sticking freezing pipe 1 is brought into close contact with the steel material inner surface 50A (for example, the inner wall of the rear body of the shield machine or the inner peripheral surface of the steel segment). Vacuum suction requires constant suction by a vacuum pump, but if the suction function is temporarily impaired due to a momentary power failure or the like, the attached freezing tube 1 may fall off. In particular, it is dangerous if the attached freezing tube 1 attached above the structure falls off.
Therefore, in the first embodiment, the attached freezing pipe 1 (or microchannel 1A) is temporarily adhered to the steel material inner surface 50A by the vacuum mechanism 10, and then fixed with the fixing fastener 7 as shown in FIG.
During the construction period of the freezing method, the sticking freezing pipe 1 and the steel material inner surface 50A are fixed by the fixing fastener 7, and after the freezing method is completed, the fixing fastener 7 is removed and the sticking freezing pipe 1 is removed. In this way, the work of removing the mortar adhering to the structure in the prior art is unnecessary, and the attached freezing tube 1 can be quickly and easily removed.

According to the first embodiment of FIGS. 9 to 14, the high heat conductive contact sheet 6 is interposed between the freezing pipe 1 and the steel material surface 50A (for example, the inner wall of the rear body of the shield machine or the inner peripheral surface of the steel segment). Therefore, when the vacuum suction mechanism 10 provided on the freezing pipe 1 is operated, the freezing pipe 1 can be attached in close contact with the steel material surface 50A. At that time, an air heat insulating layer is not formed between the freezing pipe 1 and the steel surface 50A.
Therefore, the cold heat possessed by the refrigerant (secondary refrigerant: for example, liquid phase carbon dioxide) flowing through the freezing pipe 1 is efficiently transferred to the ground to be frozen via the steel surface 50A (structure).
Further, even if the steel surface 50A (structure) has non-landing (or unevenness), the highly heat-conducting adhesive sheet 6 that is flexible and has good thermal conductivity is deformed to absorb the non-landing (or unevenness). Therefore, a gap, that is, a heat insulating layer due to air is not formed.

Further, according to the first embodiment, the freezing pipe 1 is attached to the steel surface 50A (structure) by using the vacuum suction mechanism 10, and then fixed to the steel surface 50A (structure) by the fixing fastener 7. When the freezing method is completed and the freezing pipe 1 is removed, the freezing pipe 1 can be easily removed by removing the fixing fastener 7.
Therefore, it is not necessary to remove the attached mortar from the structure as in the prior art, and the freezing tube 1 can be removed quickly and easily.

In addition to that, according to the first embodiment, the sticking freezing pipe 1 can be easily and surely attached to the steel material surface (for example, the inner wall of the rear body of the shield machine or the inner peripheral surface of the steel segment), so that the sticking freezing pipe is installed. Cost reduction can be achieved by improving work efficiency. Further, since the attached freezing pipe can be attached without performing welding work, welding work in the tunnel is unnecessary, the burden on the operator can be reduced, and pollution of the working environment can be prevented. Further, it is possible to reduce the risk of a fall accident or the like in the upward construction of a heavy object in the tunnel mine.

Here, a modified example of the first embodiment of FIGS. 9 to 14 will be described.
In FIGS. 12 and 13, the temporary blocking tape 13 that temporarily closes the vacuum hole 10H is not peeled off (including the case where the vacuum hole 10H is not drilled in the member forming the vacuum space VS in FIGS. 9 to 14). With the temporary closing tape 13 attached, the microchannel 1A is temporarily fastened and fixed, and the freezing method is executed. Then, when it is no longer necessary to freeze the ground, a thermal fluid (for example, hot water) is allowed to flow through the space VS (see FIG. 9A) at both ends of the microchannel 1A.
Since the space VS (see FIG. 9 (A)) temporary closing tape 13 at both ends of the microchannel 1A is attached, the vacuum hole 10H is closed by the temporary closing tape 13, and the space VS is filled with a hot fluid (for example, hot water). ) Flows through the area to which the microchannel 1A is attached without leaking from the vacuum hole 10H, and at that time, depending on the amount of heat possessed by the thermal fluid (for example, hot water), the microchannel 1A The space between the steel material inner surface 50A and the steel material inner surface 50A is heated. Therefore, the microchannel 1A can be easily peeled off (removed) from the steel material inner surface 50A. Therefore, according to the above-mentioned modification, the microchannel 1A can be quickly removed after the freezing method is applied.
Other configurations and actions and effects in the modified examples of the first embodiment mainly described with reference to FIGS. 12 and 13 are the same as those of the first embodiment.

Next, a second embodiment of the present invention will be described with reference to FIGS. 15 to 17.
In the first embodiment of FIGS. 9 to 14, the vacuum adsorption mechanism 10 is integrally added to the attached freezing tube 1 itself, but in the second embodiment of FIGS. 15 to 17, the vacuum adsorption mechanism is the attached freezing tube. It is configured to be separable from.
In FIG. 15, the attached freezing tube 1 (attached freezing tube having microchannels 1A in which a plurality of microchannels 1AA (not shown) are formed) similar to that of the first embodiment is separate from the vacuum type flat coolant pressing device 11. It is configured in. The vacuum type flat coolant pressing device 11 is configured in a concave shape as a whole, and the microchannel 1A (attached freezing tube 1) is a concave portion R of the vacuum type flat coolant pressing device 11 (mounting jig). Can be accommodated in. In other words, the vacuum flat coolant pressing device 11 is configured to surround the microchannel 1A.

In FIG. 15, the vacuum type flat coolant pressing device 11 has a main body portion 11A at both ends (left and right ends in FIG. 15), and the main body portion 11A is arranged in a direction in which the refrigerant flow path extends, and vacuum is provided therein. Space VS is formed.
The main body portions 11A at both ends of the vacuum type flat coolant pressing device 11 communicate with each other by the communication portion 11B, and communicate with the vacuum pump (not shown) via the branch portion 11C at the substantially center of the communication portion 11B.
Although not shown, the embodiment of FIGS. 15 to 17 is applied not only when the sticking freezing pipe is attached to the inner wall surface 50A of the rear body of the shield machine 50 but also when it is arranged in the steel segment (or synthetic segment). It is possible.

A plurality of vacuum holes 11H (drill holes) are formed at regular intervals in the refrigerant flow path extending direction (direction perpendicular to the paper surface in FIG. 15) on the bottom surface of the main body 11A (on the inner wall surface 50A side of the rear body of the shield machine 50). Has been done.
Similar to the first embodiment, the high thermal conductive contact sheet 6 is attached to the bottom surface of the microchannel 1A (the inner wall surface 50A side of the rear body of the shield machine 50), and the main body of the vacuum type flat coolant pressing device 11 is attached. An air flow blocking sheet 9 is provided on the bottom surface of 11A (on the inner wall surface 50A side of the rear body of the shield machine 50).

As described above, the microchannel 1A having the high thermal conductive contact sheet 6 attached to the bottom surface is arranged so as to fit into the recess R of the vacuum type flat coolant pressing device 11. In other words, the microchannel 1A is surrounded by the vacuum type flat coolant pressing device 11.
When the vacuum pump (not shown) is operated, the air in the vacuum space VS is sucked, and the vacuum holes 11H formed on the bottom surface of the main body 11A on both sides of the vacuum type flat coolant pressing device are below the bottom surface of the microchannel. The air existing in the region is sucked (arrow G), and the vacuum type flat coolant pressing device 11 is adsorbed on the inner wall surface 50A of the rear body portion of the shield machine 50. As a result, the microchannel 1A is pressed against the inner wall surface 50A of the rear body of the shield machine 50.
Since the high thermal conductive contact sheet 6 is interposed, the secondary flow through the microchannel in the microchannel 1A without forming a gap between the microchannel 1A and the inner wall surface 50A of the rear body of the shield machine 50. The cold heat possessed by the refrigerant is reliably and efficiently transferred to the outer body (steel shell) of the shield machine.

In FIG. 15, an air hole 11DA is provided on the side of the communication portion 11B communicating with the vacuum space VS of the vacuum type flat coolant pressing device 11, and the vacuum suction can be performed by adjusting the opening degree of the air hole 11DA. The strength can be adjusted. The mechanism for adjusting the opening degree of the air hole 11DA is specified in FIG.
In FIG. 16, the air hole opening degree adjusting mechanism 11D for adjusting the strength of vacuum suction adjusts the opening degree of the air hole 11DA by operating the lever 11A. By operating the lever 11DB as shown by the arrow H, the opening degree of the air hole 11DA changes from fully open to fully closed, and the air suction force from the bottom surface of the main body 11A fluctuates, resulting in a high heat conduction contact sheet. The effect of pressing the microchannel 1A against the inner wall surface 50A of the rear body of the shield machine 50 can be adjusted via 6. Here, if the air hole 11DA is fully open, the air suction force from the bottom surface of the main body 11A is "weakest", and if it is fully closed, it is "strongest". In addition, in FIGS. 16 and 17, the flow of the suction air is indicated by an arrow G.

As shown in FIG. 17, the vacuum type flat coolant pressing device 11 does not surround the entire length of the refrigerant flow path extending direction of the microchannel 1A, but is one of the refrigerant flowway extending directions of the microchannel 1A. The microchannel 1A is pressed against the steel surface 50A so as to surround only the portion. Then, as shown in FIG. 14, the region near the microchannel 1A pressed against the steel surface 50A is fixed by the fixing fastener 7.
In the second embodiment, the micro channel 1A is pressed (temporarily fastened) to the steel surface 50A by the vacuum type flat coolant pressing device 11 and fixed to the steel surface 50A by the fixing fastener 7 in this order. Channel 1A is attached to the steel surface 50A over its entire length.

According to the second embodiment of FIGS. 15 to 17, for example, even when the microchannel 1A must be divided into short distances and attached to a structure (for example, the rear body of a shield machine or a steel segment), the vacuum type is used. By using the flat coolant pressing device 11, it is possible to efficiently attach the flat coolant in a state where the worker can move easily.
Other configurations and effects in the second embodiment of FIGS. 15 to 17 are the same as those of the first embodiment of FIGS. 9 to 14.

Next, a third embodiment of the present invention will be described with reference to FIG.
As described above, in the conventional freezing method using the attached freezing pipe 1A, if the frozen operation is performed with the attached freezing pipe 1A, which is a square steel pipe, exposed to the air, a high humidity environment such as inside a tunnel is particularly high. Then, frost is generated on the surface (tube surface) other than the joint surface with the structure of the pasted freezing tube 1A (for example, the rear body of the shield machine or the steel segment). That is, in the prior art, the freezing efficiency was low because a part of the cold heat of brine, which is a refrigerant, was not used for freezing the ground but was used for forming frost.

In the third embodiment of FIG. 18, a high thermal conductive adhesive sheet 6 is attached to the bottom surface of the microchannel 1A (freezing tube 1), and a fixing fastener 7 is attached to the upper surface of the microchannel 1A. The microchannel 1A, the high thermal conductive contact sheet 6, and the fixing fastener 7 are covered with a heat insulating member 8 arranged on the outside of the fixing fastener 7.
Here, it is not necessary to fix the microchannel 1A to the structure 50 (for example, the inner wall of the rear body of the shield machine) by the heat insulating member 8, and it is sufficient that the heat insulating member 8 can simply keep the covered state.
In FIG. 18, the high thermal conductive contact sheet 6 is a water-absorbent polymer mat, and the heat insulating member 8 is made of rock wool.

According to the third embodiment of FIG. 18, since the heat insulating member 8 surrounds the fixing fastener 7 and the freezing pipe 1, the cold heat possessed by the secondary refrigerant (for example, liquid phase carbon dioxide) flowing through the freezing pipe 1. This prevents frost from being generated on the surface of the freezing pipe 1, and the cold heat possessed by the secondary refrigerant is not consumed to generate frost and is used for freezing the surrounding ground. Therefore, the freezing efficiency is improved.
Although not shown, the third embodiment of FIG. 18 can be applied not only when the sticking freezing pipe is attached to the inner wall surface 50A of the rear body of the shield machine 50 but also when it is arranged in the steel segment (or synthetic segment). Is.
Other configurations and effects in the third embodiment of FIG. 18 are the same as those of the second embodiment of FIGS. 15 to 17.

19 to 21 show a fourth embodiment of the present invention.
In each of the embodiments of FIGS. 9 to 18, vacuum (negative pressure) is used to temporarily fasten the attached freezing tube, but in the fourth embodiment of FIGS. 19 to 21, the attached freezing tube is used by magnetic force. Is fixed.
In FIG. 19 showing an outline of a fourth embodiment, the microchannel 1A and the high heat conductive contact sheet 6 are surrounded by a strong magnet 12 (permanent magnet having a strong magnetic force) and are surrounded by a steel structure 50 (for example, a permanent magnet having a strong magnetic force). It is pressed against the rear body of the shield machine and the steel segment).

In FIGS. 20 and 21 showing the specific structure of the fourth embodiment, the high heat conductive contact sheet 6 is attached to the bottom surface (the inner wall surface 50A side of the rear body of the shield machine 50) (FIG. 20). The channel 1A is arranged on the inner wall surface 50A of the rear body of the shield machine 50.
In particular, as shown in FIG. 20, the strong magnet 12 is composed of a main body portion 12A, a support portion 12B, and a grip portion 12C. Then, the tip of the support portion 12B is brought into contact with the rear body inner wall surface 50A of the shield machine 50 to surround the microchannel 1A, and the strong magnet 12 is attached to the rear body inner wall surface 50A of the shield machine 50 by its magnetic force. Has been done.

Here, the height of the support portion 12B of the strong magnet 12 (height dimension H1 in FIG. 20) is the thickness dimension of the microchannel 1A and high heat conduction in a state where no external force is applied (state in which it is not pressed). The high heat conductive contact sheet 6 is pressed when the strong magnet 12 is attached to the inner wall surface 50A (structure) of the rear body of the shield machine 50, which is slightly smaller than the sum of the thickness dimensions of the contact sheet 6. ing. As a result, the high thermal conductive contact sheet 6 is in close contact with the microchannel 1A and the rear body inner wall surface 50A (structure) of the shield machine 50, and the microchannel 1A is pressed and fixed to the rear body inner wall surface 50A of the shield machine 50. ..

In this state, as in the first and second embodiments, the shield machine 50 is provided by the fixing fastener 7 (see FIG. 14) in the vicinity of the portion surrounded by the strong magnet 12 of the microchannel 1A (freezing tube 1). It is fixed to the inner wall surface 50A (structure) of the rear fuselage.
In the fourth embodiment, the microchannel 1A is surrounded and fixed by the strong magnet 12, but it is also possible to surround and fix the microchannel 1A by a mounting jig having a magnet body (a mechanism for emitting magnetic field lines). ..
In FIG. 21, a secondary refrigerant is supplied to the microchannel 1A from a refrigerator (not shown) via a refrigerant supply pipe 2A (round pipe) and a refrigerant supply socket 1B (arrow F), and a structure (for example, a structure) in the microchannel 1A. After exchanging heat with the ground outside the shield machine outer body), the secondary refrigerant returns to the refrigerator (not shown) via the refrigerant return socket 1C and the refrigerant return pipe 2B (round pipe).

According to the fourth embodiment of FIGS. 19 to 21, if the dimension in the length direction of the microchannel 1A is relatively small, the sticking freezing tube 1 can be used as a constituent structure without using the fixing fastener 7 shown in FIG. Can be fixed.
Further, according to the fourth embodiment, since piping such as electricity and air is not required for mounting the freezing pipe 1, the mounting structure is compact and work efficiency is good.
In the fourth embodiment of FIGS. 19 to 21, a permanent magnet is used in preparation for the loss of power, but an electromagnet can also be used.

Although not shown, the fourth embodiment of FIGS. 19 to 21 is not only when the sticking freezing pipe is attached to the inner wall surface 50A of the rear body of the shield machine 50, but also when it is arranged in the steel segment (or synthetic segment). Is also applicable.
Other configurations and effects in the fourth embodiment of FIGS. 19 to 21 are the same as those of the respective embodiments of FIGS. 9 to 18.

A fifth embodiment of the present invention will be described with reference to FIG.
In the fifth embodiment of FIG. 22, a heat insulating material as shown in FIG. 18 is added to the fourth embodiment of FIGS. 19 to 21.
In FIG. 22, a microchannel 1A (freezing tube 1) to which a high thermal conductive contact sheet 6 is attached is arranged on a rear body inner wall surface 50A (structure) of the shield machine 50, and the microchannel 1A is covered with a heat insulating member 8. There is. The high thermal conductive contact sheet 6 and the heat insulating member 8 are pressed while the strong magnet 12 is attached to the inner wall surface 50A (structure) of the rear body of the shield machine 50. At that time, the high thermal conductive contact sheet 6 is in close contact with the microchannel 1A and the rear body inner wall surface 50A (structure) of the shield machine 50, and the microchannel 1A is fixed to the rear body inner wall surface 50A of the shield machine 50.

According to the fifth embodiment of FIG. 22, since the microchannel 1A is covered with the heat insulating member 8, frost is prevented from being generated on the surface of the microchannel 1A, and the cold heat possessed by the secondary refrigerant causes frost. It is used to freeze the ground without being used to produce it. Therefore, the freezing efficiency is improved.
Although not shown, the embodiment of FIG. 16 is applicable not only when the sticking freezing pipe is attached to the inner wall surface 50A of the rear body of the shield machine 50, but also when it is arranged in the steel segment (or synthetic segment). ..
Other configurations and effects in the fifth embodiment of FIG. 22 are the same as those of the fourth embodiment of FIGS. 19 to 21.

FIG. 23 shows a sixth embodiment of the present invention.
In each embodiment of FIGS. 9 to 22, a case where the sticking freezing pipe is attached to the inner wall surface of the rear body of the shield machine, which is a structure, is shown, but as shown in FIG. 23, the sticking freezing pipe (or sticking freezing) is shown. (Microchannels constituting the pipe) may be arranged inside the segment 40 beyond the segment joint plate 43.
In FIG. 23, a through hole 43A is formed in the joint plate 43 of the plurality of segments 40-1, 40-2, 40-3, ..., And the long microchannel 1A inserts the through hole 43A. The plurality of segments 40-1, 40-2, 40-3, ... Are installed.

A high thermal conductive contact sheet 6 that is flexible and has good thermal conductivity is interposed between the bottom surface (ground side) of the microchannel 1A and the skin plate 41 of the segment 40. Reference numeral 43B is a sealing member that prevents the intrusion of groundwater from the ground side.
When the microchannel 1A (attached freezing tube 1) in the sixth embodiment of FIG. 23 is temporarily fastened or fixed, for example, the vacuum type flat coolant pressing device 11 or the strong force is the same as in the embodiments of FIGS. 15 to 22. After temporarily fixing with the magnet 12, it may be fixed with the fixing fastener 7. Since the high thermal conductive contact sheet 6 is interposed, no gap is formed between the microchannel 1A and the skin plate 41, and the cooling heat of the secondary refrigerant is efficiently applied to the ground around the segment 40. Is transmitted to.

A plurality of segments 40-1, 40-2, 40- are formed by appropriately bending a long microchannel as shown in FIG. 7 so as to get over the joint plate 43 without forming the through hole 43A in the joint plate 43. Even when installed over 3, ..., the high thermal conductivity adhesive sheet 6 is flexible and has good thermal conductivity between the bottom surface (ground side) of the microchannel 1A and the skin plate 41 of the segment 40. Can be intervened and fixed.
Even in this case, since the high thermal conductive contact sheet 6 is interposed, no gap is formed between the microchannel 1A and the skin plate 41, and the cold heat of the secondary refrigerant is efficiently transferred to the ground around the segment 40. Is transmitted efficiently.

According to the sixth embodiment of FIG. 23, even when the long microchannel 1A is installed over a plurality of segments 40-1, 40-2, 40-3, ..., The segment 40 It can be fixed properly and the ground can be frozen.
Other configurations and effects in the sixth embodiment of FIG. 23 are the same as those of the second embodiment of FIGS. 15 to 17 and the fourth embodiment of FIGS. 19 to 21.

FIG. 24 shows a seventh embodiment of the present invention.
In each of the embodiments of FIGS. 9 to 23, a high thermal conductive contact sheet is arranged on the structure side of the sticking freezing tube (for example, the rear body of the shield machine or the steel segment), and a heat insulating material is provided on the side separated from the structure. It is arranged.
On the other hand, in the seventh embodiment of FIG. 24, the attached freezing tube 1 (microchannel 1A) is a cloth-like member 14 having heat insulating properties (outer cloth: corresponding to the heat insulating material of each embodiment of FIGS. 9 to 23). It is surrounded by a cloth-like member 15 (inner cloth: corresponding to the high heat conductive contact sheet of each embodiment of FIGS. 9 to 23) having good heat conductivity and good adhesion.
As the outer cloth 14, for example, a non-woven fabric can be used. Further, as the inner cloth 15, a cloth having good water permeability or a cloth wet with water can be used. Here, the cloth-like member having good thermal conductivity and good adhesion is used in the sense of including a bag-like member filled with water inside.

FIG. 25 shows a modified example of the seventh embodiment of FIG. 24, and includes the pasted freezing tube 1 so as to be sandwiched between the inner cloth 15A and the inner cloth 15B having two layers. The inner cloth 15A and the inner cloth 15B are the same as those described with reference to FIG. 24.
In the seventh embodiment of FIGS. 24 and 25, as in the respective embodiments of FIGS. 9 to 23, when fixing to the structure, the fixing fastener 7 (see FIG. 14) is fixed after being temporarily fastened. The work of fixing the fasteners may be performed for each predetermined length (area).
Other configurations and effects in the seventh embodiment of FIGS. 24 and 25 are the same as those of the respective embodiments of FIGS. 9 to 23.
Although not shown, the seventh embodiment of FIG. 24 and the modified example of FIG. 25 show, for example, a case where the sticking freezing pipe is attached to the inner wall surface 50A of the rear body of the shield machine 50, or in a steel segment (or synthetic segment). Applicable when arranging.

It should be noted that the illustrated embodiment is merely an example and is not intended to limit the technical scope of the present invention.
For example, in the illustrated embodiment, carbon dioxide in the liquid phase is illustrated as the secondary refrigerant, but other liquefied gases can also be selected.
Further, although the case of using the attached freezing tube is described in the illustrated embodiment, the present invention can be applied to other freezing methods using the freezing tube.

1 ... Attached freezing tube 1A ... Flat plate-shaped member (microchannel)
1B ・ ・ ・ Distributed socket 1C ・ ・ ・ Collecting socket 2 ・ ・ ・ Refrigerant piping (round pipe)
2A ・ ・ ・ Supply piping (round pipe)
2B ・ ・ ・ Return pipe (round pipe)
3 ... Frame 4 ... Underground transport cart 5 ... Track 6 ... High heat conduction adhesion sheet 7 ... Fixing fastener 8 ... Insulation member 9 ... Air flow blocking sheet 10 ... Negative pressure mechanism (vacuum suction mechanism)
10A ・ ・ ・ Main body 10B ・ ・ ・ Air vacuum connection block 10C ・ ・ ・ Air vacuum end block 10H ・ ・ ・ Vacuum hole (drill hole)
11 ... Vacuum type flat coolant pressing device 11A ... Main body 11B ... Communication part 11C ... Branch 11D ... Air hole opening adjustment mechanism 11H ... Vacuum hole (drill hole)
12 ... Strong magnet 12A ... Main body 12B ... Support 12C ... Grip 13 ... Temporary closing tape 14 ... Outer cloth 15, 15A, 15B ... Inner cloth 20 ...・ ・ Assembly 21 ・ ・ ・ Air piping (round pipe)
40 ... Steel segment 41 ... Skin plate 42 ... Main girder 43 ... Segment joint 43A ... Throughout 44 ... Vertical rib (partition)
44A ・ ・ ・ Space (through hole)
50 ... Shield machine 50A ... Rear fuselage inner wall surface VS ... Vacuum space

Claims (12)

It has a flow path through which the secondary refrigerant flows,
It has a flat plate-like member provided with a plurality of minute refrigerant flow paths as a flow path through which the secondary refrigerant directly flows.
Flat plate-like member having a flexible, formed of a material having thermal properties that are involved in the absorption of the cold heat dissipation and heat, attached to the structure,
A freezing tube provided with a member having flexibility and thermal conductivity so as to be in close contact with a structure. The flat plate-shaped member is joined by a dispersion socket having a space communicating with the secondary refrigerant supply system at one end and a collective socket having a space communicating with the secondary refrigerant return system at the other end. The freezing tube according to claim 1, which is joined. The freezing tube according to any one of claims 1 and 2, wherein the secondary refrigerant is carbon dioxide. The freezing tube according to any one of claims 1 to 3, which has a negative pressure mechanism so as to be in close contact with a structure. The freezing pipe according to claim 4, wherein the negative pressure mechanism has a pipe line extending in parallel with the flat plate-shaped member, and the pipe line communicates with a hot fluid supply source. The freezing tube according to any one of claims 1 to 3, which is configured to be surrounded by a mounting jig having a negative pressure mechanism so as to be in close contact with the structure. The freezing tube according to any one of claims 1 to 3, which is configured to be surrounded by a mounting jig having a mechanism for emitting magnetic lines of force in order to adhere to a steel structure. The freezing tube according to any one of claims 1 to 7, which is covered with a heat insulating material. Has a flat plate-like member having a plurality of fine coolant flow path is provided as a channel through the secondary coolant directly, flat plate-like member has a flexible, responsible for the absorption of thermal dissipation and thermal In the mounting method of attaching a freezing tube made of a material having thermal properties to a structure,
The cryotubes has a negative pressure mechanism, while interposed between the freeze pipe and the structure member having a flexible and thermally conductive, by placing cryotubes into a predetermined position, a negative pressure mechanism To temporarily fasten the freezing tube,
A method of attaching a freezing tube, which comprises fixing a temporarily fastened freezing tube to a structure with a fixing fastener. The negative pressure mechanism has a pipeline extending parallel to the flat plate-shaped member, and the pipeline communicates with a hot fluid supply source, and when the ground does not need to be frozen, the pipe is used. The method for attaching a freezing pipe according to claim 9, wherein a thermal fluid is allowed to flow through the path. Has a flat plate-like member having a plurality of fine coolant flow path is provided as a channel through the secondary coolant directly, flat plate-like member has a flexible, responsible for the absorption of thermal dissipation and thermal In the mounting method of attaching a freezing tube made of a material having thermal properties to a structure,
While interposed between the negative by pressure mechanism mounting jig having a surrounding said freezing tube, freeze pipe and the structure member having a flexible and thermally conductive, given the mounting jig having a negative pressure mechanism Place it in position and activate the negative pressure mechanism to press the freezing tube against the structure and temporarily fasten it.
A method for attaching a frozen tube, which comprises fixing a temporarily fastened freezing tube to a structure with a fixing fastener in the vicinity of a portion surrounded by the attaching jig. Has a flat plate-like member having a plurality of fine coolant flow path is provided as a channel through the secondary coolant directly, flat plate-like member has a flexible, responsible for the absorption of thermal dissipation and thermal In the mounting method of attaching a freezing tube made of a material having thermal properties to an iron structure,
The mounting jig having a mechanism that emits magnetic field lines surrounding the cryotubes, a member having a flexible and thermally conductive in a state interposed between the freezing tube and iron structure, cryotubes by the mounting jig Is pressed against the iron structure and temporarily fastened.
A method for attaching a frozen tube, which comprises fixing a temporarily fastened freezing tube to a structure with a fixing fastener in the vicinity of a portion surrounded by the attaching jig.

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