JP2744208B2 - Method of installing rebar unit in concrete placing space in tunnel and rebar unit installation device used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a reinforcing bar unit for installing a reinforcing bar unit for concrete reinforcement in a concrete casting space between a tunnel excavated and a centur set inside the tunnel. The present invention relates to a rebar unit installation device for setting a rebar unit used in a method at a concrete placing position.

[0002]

2. Description of the Related Art Conventionally, there has been a concrete placing method for placing reinforced concrete as shown in FIG. 10 on the inner wall surface of an excavated tunnel. One of the methods is a reinforced concrete placing method as described below. . . Concrete is sprayed on the inner wall surface of the excavated tunnel A to form the primary lining concrete B. . A waterproof sheet C is attached to the surface of the primary lining concrete B. . A setup bar E for fixing the reinforcing bar D is driven into the primary lining concrete B from the surface of the waterproof sheet C. The setup lines E must be accurately driven into the inner wall surface of the tunnel A at a predetermined pitch.

[0003] The holes formed in the waterproof sheet C are closed by spraying a waterproofing agent or the like on the portion of the waterproof sheet C into which the setup streaks E are driven, and the waterproof sheet C is subjected to a water stopping process. . The reinforcing bar D is connected to the setup bar E by a line or the like, and an arch-shaped reinforcing bar unit F is constructed in a lattice shape on the inner wall surface of the tunnel A. . A concrete casting center G is set inside the reinforcing bar unit F, and a concrete casting space is formed between the center G and the waterproof sheet C. . Concrete is poured from the inside of the center G into the concrete placing space on the outer periphery thereof, and the reinforcing unit F is buried in the concrete to form an arched reinforced concrete H.
Lining.

[0004] There are also the following variations in the reinforced concrete casting method. . A method in which a primary lining concrete B is formed on the inner wall surface of the tunnel A, and then a setup bar E is driven without setting a waterproof sheet C. . A method in which a waterproof sheet C is stuck on the inner wall surface of the tunnel A without forming the primary lining concrete B, and a setup bar E is driven onto the waterproof sheet C. . Assemble the reinforcing bar unit in a grid pattern on a reinforcing bar jumbo (mobile trolley with a reinforcing bar assembly gauge),
A method in which this rebar unit is moved to the concrete pouring position while being placed on the rebar jumbo, and is attached collectively to the setup bar that is driven into the inner wall surface of the tunnel.

[0005]

However, the reinforced concrete casting method has the following problems. . When the lattice-shaped reinforcing bar unit F is tied to the setup bar E, a large number of setup bars E are attached to the inner wall surface of the tunnel A at a predetermined pitch (the grid of the reinforcing bar unit F) in order to bind the intersection of the reinforcing bar units F to the setup bar E. You have to hit it exactly on the pitch). However, this was a very laborious task. . Since the inner wall surface of the excavated tunnel A has considerable unevenness, it was difficult to accurately drive the setup streaks E into predetermined positions. In this case, it becomes difficult to tie the reinforcing bar unit F as designed, and as it is, the reinforcing bar D cannot be arranged in the concrete placing space as designed.

[0006] When the waterproof sheet C is stretched, a hole is opened in the waterproof sheet C while the setup streaks E are driven, and water leaks from the hole, so that the water stopping process must be performed. This work requires more work as the number of setup lines E increases. Further, it is quite difficult to completely stop the waterproof sheet C once perforated, and even after the water stop processing, water leakage occurs over time. . The construction method of assembling the rebar unit F with the rebar jumbo and the like and setting it in the concrete placing space in the tunnel A has a shortened construction period as compared with the method of assembling the rebar individually on the setup bar E and assembling them in a lattice. Although the work is facilitated, the above-mentioned problems (1) to (4) have not been solved because the rebar unit previously assembled must be attached to the setup bar.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of installing a reinforcing bar unit in a concrete casting space in a tunnel, in which a reinforcing bar can be easily and quickly installed in a concrete casting space between a tunnel and a center inside the tunnel. To provide a reinforcing bar unit installation device.

[0008]

According to the present invention, there is provided a method for installing a reinforcing bar unit in a concrete placing space in a tunnel according to the first aspect of the present invention, as shown in FIGS. Reinforcing unit 4 assembled so that it can be placed in concrete placing space 3 between
The moving frame 6 of the moving vehicle 5 that can move in the tunnel 1
The moving frame 6 is supported by the concrete placing space 3
The moving frame 6 is removed from the reinforcing bar unit 4, the reinforcing frame unit 4 is disposed in the concrete placing space 3, and the moving frame 6 is moved to the same position. It is characterized in that it is detached from the reinforcing bar unit 4 and returned to the outside of the concrete placing space 3.

According to a second aspect of the present invention, there is provided a method for installing a reinforcing bar unit in a concrete placing space in a tunnel.
Is supported by a support 7 that is attached to the center 2 and protrudes into the concrete casting space 3.

According to a third aspect of the present invention, there is provided a method for installing a reinforcing bar unit in a concrete placing space in a tunnel.
Is guided by a guide tool 8 provided on the outer peripheral surface of the center 2.

As shown in FIGS. 1 and 2, the rebar unit installation apparatus according to claim 4 of the present invention is arranged on a movable carriage 5 movable in the depth direction of the tunnel 1 inside the tunnel 1 and inside the tunnel. A movable frame 6 capable of detachably supporting a reinforcing bar unit 4 that can be disposed in the concrete placing space 3 between the center 2 and the movable frame 6 capable of reciprocating in the depth direction of the tunnel 1; A frame drive that allows the rebar unit 4 supported by the moving frame 6 to enter the inside of the concrete placing space 3 and that can send the moved moving frame 6 back out of the concrete placing space 3. A mechanism 9 is provided.

As shown in FIG. 3, the rebar unit installation apparatus according to the fifth aspect of the present invention is configured such that the moving frame 6 and the frame driving mechanism 9 are mounted at desired intervals in the circumferential direction of the moving carriage 5. It is a feature.

According to a sixth aspect of the present invention, as shown in FIGS.
Is movable by the frame driving mechanism 9 in the depth direction of the tunnel 1, a movable rack 11, a support beam 12 reciprocally movable with the movable rack 11 and capable of supporting the rebar unit 4, and a support beam 12 of the tunnel 1. A support beam drive mechanism 13 for reciprocating to the inner wall surface side is provided.

As shown in FIG. 8, the rebar unit installation apparatus according to the present invention comprises a guide 8 for guiding the moving frame 6 fed into the concrete casting space 3 outside the centre 2 as shown in FIG. It is characterized by becoming.

As shown in FIGS. 6 and 7, the reinforcing unit installation apparatus according to the eighth aspect of the present invention supports the reinforcing unit 4 of the moving frame 6 which is fed into the concrete placing space 5 outside the center 2. It is characterized by comprising a support 7

[0016]

According to the method for installing a reinforcing bar unit in a concrete placement space in a tunnel according to the first aspect of the present invention, as shown in FIG. Moving frame 6 of moving carriage 5
In order to feed the moving frame 6 into the concrete placing space 3 and to feed the reinforcing bar unit 4 supported by the moving frame 6 into the concrete placing space 3 as shown in FIG.
The assembling of the reinforcing bar unit 4 and the installation work on the center 2 can be performed in parallel. Also, the moving frame 6 is removed from the reinforcing bar unit 4 and the reinforcing bar unit 4 is
In this case, the work is installed in the concrete placing space 3 and the work of attaching the setup streaks and the work associated therewith can be eliminated. And the reinforcing bar unit 4 is the center 2
After the support, the moving frame 6 is detached from the reinforcing bar unit 4 and returned to the outside of the concrete placing space 3 so that the concrete placing into the space 3 can be performed.

According to a second aspect of the present invention, there is provided a method for installing a reinforcing bar unit in a concrete placing space in a tunnel.
Since the reinforcing bar unit 4 sent into the concrete placing space 3 is supported by the support 7 attached to the center 2, the reinforcing bar unit 4 can be accurately fixed to a desired position in the concrete placing space 3, and accordingly. High precision as designed,
High quality reinforced concrete can be cast.

According to the third aspect of the present invention, there is provided a method for installing a reinforcing bar unit in a concrete placing space in a tunnel.
Since the moving frame 6 sent into the concrete placing space 3 is guided by the guide 8 provided on the outer peripheral surface of the centre 2, the reinforcing bar unit 4 can be accurately sent to a desired position in the concrete placing space 3. It is possible to cast high-precision, high-quality reinforced concrete as designed.

In the rebar unit installation apparatus according to the fourth aspect of the present invention, the movable carriage 5 capable of moving in the tunnel 1 is provided.
In addition, it is possible to support the reinforcing bar unit 4 and move in the depth direction of the tunnel 1 to enter the concrete casting space 3,
A movable frame 6 capable of retreating, and a frame drive mechanism 9 for reciprocating the movable frame 6 in the depth direction of the tunnel 1
Is provided, it is possible to transport the reinforcing bar unit 4 to the position just before the centre 2 by moving the movable cart 5, and to project the moving frame 6 to cast the reinforcing bar unit 4 on the outer peripheral side of the centre 2. It can be arranged in the space 3 or pulled out of the concrete placing space 3 in which the reinforcing bar unit 4 is set by pulling back the moving frame 6.

In the rebar unit installation apparatus according to the fifth aspect of the present invention, the moving frame 6 and the frame driving mechanism 9 are attached to the moving carriage 5 at a desired interval in the circumferential direction of the tunnel 1, so that the tunnel 1 The rebar unit 4 assembled in a similar arch shape can be firmly supported by the moving frame 6, and the rebar unit 4 can be reliably moved by the drive mechanism 9 for each moving frame 6. Therefore, the reinforcing bar unit 4 can be accurately installed in the concrete casting space 3.

In the rebar unit installation apparatus according to claim 6 of the present invention, the movable frame 6 is reciprocated in the depth direction of the tunnel 1 by the frame driving mechanism 9 and is reciprocally movable together with the movable rack 11. A support beam 12 which is capable of supporting the rebar unit 4 and
And a support beam driving mechanism 13 for reciprocating the support beam to the inner wall surface side of the tunnel 1.
While moving in the outer circumferential direction, the reinforcing bar unit 4 is supported and sent into the concrete placing space 3,
When is located at a desired position in the concrete placing space 3, the support beam 12 can be moved in the inner circumferential direction of the tunnel 1 to replace the reinforcing bar unit 4 on the centre 2. In this case, the rebar unit 4
Is provided on the center 2 at an interval, the reinforcing bar unit 4 is mounted on the support 7 and fixed to the outer periphery of the center 2. When the support beam 12 is further moved in the inner circumferential direction of the tunnel 1, the support beam 12 comes off the reinforcing bar unit 4 and can be pulled out from the reinforcing bar unit 4.

In the rebar unit installation apparatus according to claim 7 of the present invention, since the guide 8 for guiding the moving frame 6 fed into the concrete casting space 3 is provided outside the center 2, the moving carriage 5 is provided. Moving frame 6
Is slid accurately.

In the reinforcing bar unit installation apparatus according to the present invention, the support 7 for supporting the reinforcing bar unit 4 of the moving frame 6 fed into the concrete placing space 5 is provided outside the centre 2. The rebar unit 4 carried on the center 2 by the moving frame 6 can be placed on the support 7 and fixed. If the reinforcing bar unit 4 is replaced on the support 7, the moving frame 6 can be easily pulled out thereafter. If necessary, the position of the reinforcing bar unit 4 can be adjusted by adjusting the height of the support 7.

[0024]

[Embodiment of Rebar Unit Installation Apparatus] One embodiment of the rebar unit installation apparatus of the present invention will be described in detail with reference to FIG. 4 shown in FIG. 1 is a reinforcing bar unit. This is assembled in a lattice-like arch shape using a large number of rebars 20 and other members so that it can be arranged in the concrete casting space 3 between the tunnel 1 and the center 2 set inside the tunnel. Has become. This rebar unit 4 can be assembled in an arched shape on a moving carriage 5 described later,
It can also be arched elsewhere. For example, an assembling gauge such as a reinforcing bar jumbo is installed between the excavation point and the concrete placing point in the tunnel 1, and the assembling work of the reinforcing bar unit 4 can be performed thereon. Also, a plurality of assembled rebar units 4 are suspended at appropriate positions in the tunnel 1, and the movable cart 5 is moved below these rebar units 4 as necessary, and is mounted on the movable cart 5. You can also. By doing so, the work of installing the reinforcing bar unit 4 by the movable trolley 5 and the work of assembling the reinforcing bar unit 4 by the reinforcing bar jumbo can be performed in parallel, and the working efficiency is further increased.

Reference numeral 5 shown in FIG. 1 is a movable carriage for assembling the reinforcing bar unit 4 and transporting the assembled reinforcing bar unit 4. The movable trolley 5 is formed in an arch shape substantially the same as the centre 2 using a steel material such as an H-shaped steel or a steel plate. The mobile trolley 5 has a plurality of wheels 21 mounted on a lower portion mounted on rails (not shown) laid in the tunnel 1 so that the trolley 5 can move back and forth in the tunnel 1. Has become. This movement is performed by a drive mechanism (not shown). The supporting cart 5 can be replaced with a conventional reinforcing bar jumbo (a mobile cart having a reinforcing bar assembly gauge).

On the outer periphery of the arched support frame 22 of the movable carriage 5, long movable frames 6 are attached at desired intervals in the circumferential direction thereof. A frame drive mechanism 9 for horizontally sliding the frame is mounted. The individual drive mechanisms 9 are configured to operate in conjunction with each other,
As shown in FIG. 1 and FIG. 2, all the moving frames 6 can be simultaneously protruded to the rear of the moving trolley 5, and the protruding frames 6 can be pulled back to the moving trolley 5 side. Naturally, all the moving frames 6 are attached to the moving trolley 5 so as to be inserted into the concrete casting space 3 between the tunnel 1 and the center 2.

As shown in FIGS. 4, 5 and 6, the movable frame 6 is guided by a rack guide 23 provided on the outer periphery of a support frame 22 so as to be slidable.
And a support beam 12 arranged in parallel on the upper side of the rack 11
And a hydraulic cylinder (support beam drive mechanism) 13 that connects the movable rack 11 and the support beam 12 and moves the support beam 12 up and down with respect to the movable rack 11. A driven roller 28 is attached to both sides of the moving rack 11, and the driven roller 28 rolls on a roller rail 29 attached to the support frame 22 or on the outer peripheral surface (the surface of the skin plate) of the center 2. You can slide. The lower surface of the movable rack 11 is formed with teeth for meshing gears. At the upper part of the support beam 12, a locking pin 30 for locking the reinforcing bar 20 of the reinforcing bar unit 4 is attached. When the support beam 12 is raised by the hydraulic cylinder 13, the locking pin 30 is raised together with the support beam 12, and
When the support beam 12 is lowered by 3, the support beam 12 is lowered together with the support beam 12.

As shown in FIGS. 4 and 5, the frame drive mechanism 9 comprises an electric motor 25 mounted on the support frame 22, a pinion 26 thereof, and an intermediate gear 27 meshed with the pinion 26. Intermediate gear 2
The tooth 7 is meshed with the tooth of the moving rack 11. In the frame driving mechanism 9, when the electric motor 25 is rotated, the pinion 26 and the intermediate gear 27 are rotated, and the movable rack 11 is slid. The sliding direction of the movable rack 11 can be switched by changing the rotation direction of the electric motor 25.

The movable frame 6 arranged on the outer periphery of the movable carriage 5 has an arched metal member (not shown).
The connection in the lateral direction (circumferential direction of the arch) may increase the rigidity. In this case, the moving racks 11 of the moving frame 6 may be connected to each other, or the support beams 12 may be connected to each other.

In addition, the moving frame 6 attached to the moving carriage 5 may have a shape and structure other than those described above. The point is that the rebar unit 4 placed on the movable trolley 5 can be firmly supported, and the rebar unit 4 can be safely sent out into the concrete casting space 3 on the outer periphery of the center 2 while supporting the rebar unit 4. It should just be able to do.

Reference numeral 8 shown in FIG. 1 is a guide for guiding the moving frame 6 sent out to the outer peripheral surface of the center 2. This guide 8 is made of wood, and the driven roller 28 of the moving frame 6 is attached to the surface of the wood 31 as shown in FIG.
Are formed in two rows. The guide 8 can be attached to an opening / closing window 33 opened on the outer peripheral surface of the center 2. This installation is opening window 3
The guide member 8 can be fixed to both ends of the connecting member 34 protruding from the inside of the guide member 3 with pins 35.
5 can be skipped. The guide 8 needs to be mounted in accordance with the traveling position of the moving frame 6 sent out from the moving carriage 5.

Reference numeral 7 shown in FIG. 1 denotes a support for supporting the reinforcing bar unit 4 disposed in the concrete casting space 3 on the centre 2. The support 7 can be detachably attached to the outer peripheral surface of the center 2. As shown in FIGS. 4, 6, and 7, the support 7 includes a block 40 formed of a rectangular parallelepiped made of concrete, and bolts 41 protrudingly attached to the block 40. The bolt 41 is a skin plate 4 of the center 2
4 can be inserted into a small hole 42 opened in the same, and the tip of the bolt 41 can be fixed to the skin plate 44 by a nut 43 from the inside of the skin plate 44. In this case, the height of the block 40 can be adjusted by changing the tightening position of the nut 43. The position of the hole 42 to be opened in the skin plate 44 is determined based on the structure of the reinforcing bar unit 4, and it is necessary that the reinforcing bar unit 4 be accurately supported by the support 7.

When the concrete is cast, the support 7 is buried in the concrete. Therefore, a large number of the supports 7 are required until one tunnel is completed. For this reason, the support 7 must be made in a large amount. For this purpose, for example, a method as shown in FIG. 7 can be used. A large number of lattice-shaped mold frames 62 are formed by inserting partition plates 61 vertically and horizontally inside a wooden wooden box 60 that is easy to assemble and disassemble, and bolts 41 are vertically set in the mold frames 62, and the mold is formed in this state. The frame 62 is filled with ready-mixed concrete. If the wooden box 60 is destroyed when the concrete has solidified, a large number of supports 7 having bolts 41 protruding from the rectangular block 40 are completed at a time.

The support 7 can be set by attaching it to the skin plate 44 from the outside of the center 2. In this case, the block 40 of the set support 7 is supplied to the rebar unit 4, which is fed into the center 2, or the like. Since it is uncomfortable to hit the moving frame 6, it is desirable to temporarily retract the support 7 inside the center 2 so that it can be stored. Specifically, as shown in FIG. 9, an opening hole 45 (corresponding to the hole 42 in FIG. 4) is formed in the skin plate 44 so as to allow the block 40 of the support member 7 to pass therethrough. The support bar 46 having a rectangular shape is attached, and a slide pipe 47 is screwed inside the support base 46. By turning the slide pipe 47, the pipe 47 can be retracted inside the rebar receiving metal support base 46 or protruded outside. A closing plate 49 for closing the opening hole 45 is attached to the tip of the slide pipe 47, and a lid plate 50 is attached to the other end. The closing plate 49 and the lid plate 50 have bolts 4
Insertion holes 52 and 53 for inserting the
At 0, a cylinder 54 is attached. An opening 55 for disposing a nut 58 in the insertion hole 53 of the cover plate 50 and an insertion hole 57 for inserting a rod-like lever 56 are formed on the outer periphery of the cylindrical body 54.

When mounting the support 7 as shown in FIG. 9, the bolts 41 of the support 7 are inserted into the closing plate 49 and the cover plate 50 of the slide pipe 47 from outside the skin plate 44 as shown in FIG. As shown in FIG. 3B, the tip of the bolt 41 is fixed to the cover plate 50 with the nut 55, and the slide pipe 47 is rotated by the lever 56 to move the outer side of the reinforcing bar support 46 as shown in FIG. , The block 40 of the support 7 can be accommodated inside the opening hole 45. When the slide pipe 47 is rotated in the reverse direction by the lever 56 and retracted into the reinforcing bar support 46, the block 4 of the support 7 housed inside the opening 45 is opened.
0 can protrude outside the opening hole 45. Then, the opening hole 45 from which the block 40 protrudes can be closed flat by the closing plate 49.

In the mounting structure shown in FIG. 9, the support 7 can be set from the inside of the center 2. The slide pipe 47 is rotated by the lever 56 so as to be extracted from the rebar receiving metal support base 46, and the support 7 is attached to the extracted slide pipe 47 as shown in FIG. 9B.
If the slide pipe 47 with the support 7 is screwed to the reinforcing bar support 46, the support 7 can be easily mounted.
Can be set.

It is also conceivable that the support 7 is attached to the reinforcing bar unit 4 instead of to the center 2. For example, a support member is provided on the reinforcing bar 20 of the reinforcing bar unit 4 so as to be able to support the reinforcing bar unit 4 with an appropriate gap provided on the outer periphery of the center 2.
Can be independently supported on the center 2 by this support member.

[0038]

[Embodiment of a method of installing a reinforcing bar unit in a concrete placing space in a tunnel] FIGS. 1 and 2 show an embodiment of a method of installing a reinforcing bar unit of the present invention. This installation method will be described below. 1. A support 7 for supporting the reinforcing bar unit 4 is attached to the outer peripheral surface of the center 2. In this case, the support 7 is shown in FIG.
As shown in (c), it is housed inside the center 2 so as not to protrude from the surface of the center 2. 2. In addition, a guide 8 for guiding the moving frame 6 sent from the moving cart 5 is attached to the outer peripheral surface of the center 2. The guide 8 is attached to an opening / closing window 33 provided on the outer peripheral surface of the center 2 as shown in FIG.

3. An arched reinforcing bar unit 4 to be placed in a concrete casting space 3 between the tunnel 1 and the center 2 is assembled. This assembling may be performed on the movable trolley 5, but may be performed by installing another conventional reinforced jumbo in the tunnel 1, for example, a conventional reinforced jumbo, and assembling on the reinforced jumbo. Further, the reinforcing bar unit 4 may be assembled by other methods. For example, assemble a small unit outside tunnel 1, bring it into tunnel 1,
The reinforcing bar unit 4 may be assembled in an arch shape at a location wider on the excavator side than the concrete placing position.

4. The rebar unit 4 assembled in an arch shape is supported on the moving frame 6 of the moving trolley 5, and in this state, the moving trolley 5 is moved to approach the front end of the center 2, and the moving trolley 5 and the center 2 are aligned. To be placed. 5. The moving frame 6 of the moving carriage 5 is protruded toward the center 2, and the frame 6 is moved along the outer peripheral surface of the center 2. Thereby, the rebar unit 4 on the moving frame 6
Are arranged on the outer periphery of the center 2.

6. When the rebar unit 4 is arranged on the outer periphery of the centre 2, the support beam 12 of the moving frame 6 is moved toward the centre 2, and the rebar unit 4 is moved toward the centre 2. Then, the reinforcing bar unit 4 is placed on the support 7 protruding from the outer peripheral surface of the center 2. Reinforcing unit 4
Is fixed on the support 7 and the pin 3 of the support beam 12 is fixed.
When 0 is disengaged from the reinforcing bar unit 4, the support beam 12 stops moving, and then the movable frame 6 is slid toward the movable carriage 5 and pulled back. When the moving frame 6 is completely pulled out of the concrete placing space 3 (when the moving frame 6 is removed from the center 2), the moving carriage 5 assembles the next reinforcing bar unit 4, or has the reinforcing bar unit 4 already assembled. Move to the position to support the next rebar unit 4.

7. The guide 8 attached to the opening / closing window 33 of the center 2 is removed from the center 2 and the opening / closing window 33 is closed.
In addition, a plate is attached to the arched edge at the front end of the center 2 to completely close the concrete casting space 3. Then, concrete is poured into the concrete casting space 3 from a concrete filling port (not shown) provided in the center 2. When the concrete has solidified, the nuts holding the bolts 41 of the support 7 are removed, and then the centrifuge 2 is released. A support 7 is provided on the inner peripheral surface of the cast concrete.
Since the bolts 41 are protruding, the bolts 41 are removed, and the remaining holes are closed with concrete to complete the placement of the concrete in the tunnel.

[0043]

The method of installing a reinforcing bar unit in a concrete placing space in a tunnel according to the present invention has the following effects. . Since no setup bar is required, the time and labor required for installing the reinforcing bar unit can be reduced. . Since there is no hole in the waterproof sheet, there is no need to perform water stoppage. In addition, since the waterproofness of the waterproof sheet is not impaired, the waterproof performance can be guaranteed. . Since the complicated assembling of the reinforcing bar unit can be performed at a place different from the concrete placing position, the concrete placing operation can be performed efficiently.

By using the reinforcing bar unit installation apparatus of the present invention, the reinforcing bar unit mounting method of the present invention can be easily realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a method of installing a reinforcing bar unit in a concrete placing space in a tunnel and a reinforcing bar unit installing apparatus used in the same according to the present invention, wherein the reinforcing bar unit is supported by a movable trolley. Indicates the state in which

FIG. 2 is a perspective view showing one embodiment of a method for installing a reinforcing bar unit in a concrete placing space in a tunnel and a reinforcing bar unit installing apparatus used in the present invention, wherein the reinforcing bar unit is supported by a centre; An indication of the state.

FIG. 3A is a plan view of the reinforcing bar unit installation apparatus shown in FIGS. 1 and 2, and FIG. 3B is a front view thereof.

FIG. 4 is an enlarged view of a portion A in FIG.

FIGS. 5A and 5B are enlarged views of a moving frame in the reinforcing bar unit installation apparatus, wherein FIG. 5A is a side view and FIG. 5B is a front view.

FIG. 6 is a side view showing a state where the reinforcing bar unit is set on a support of the center.

FIG. 7 (a) is an explanatory view showing how to make a support,
(B) is a perspective view of a support.

FIG. 8 is a perspective view showing a guide member and a mounting structure thereof.

FIGS. 9A to 9C are cross-sectional views showing another mounting structure of the support tool.

10A is a cross-sectional view of a conventional reinforced concrete, and FIG. 10B is an explanatory view showing a state in which water leaks from the reinforced concrete that has been cast.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel 2 Center 3 Concrete placing space 4 Rebar unit 5 Moving trolley 6 Moving frame 7 Support 8 Guide 9 Frame drive mechanism 11 Moving rack 12 Support beam 13 Support beam drive mechanism

Claims (8)

(57) [Claims] 1. A rebar unit (4) assembled so as to be placed in a concrete casting space (3) between a tunnel (1) and a center (2) set inside the tunnel (1) is inserted into the tunnel (1). Is supported by a movable frame (6) of a movable carriage (5), and the movable frame (6) is sent into a concrete placing space (3), and a reinforcing bar unit (4) supported by the movable frame is placed in concrete. The moving frame (6) is fed into the space (3), the moving frame (6) is detached from the reinforcing bar unit (4), and the reinforcing bar unit (4) is arranged in the concrete placing space (3). 4)
A method of installing a reinforcing bar unit in a concrete placing space in a tunnel, wherein the reinforcing bar unit is removed from the concrete placing space (3). 2. The method for installing a reinforcing bar unit in a concrete placing space in a tunnel according to claim 1, wherein the reinforcing bar unit (4) sent into the concrete placing space (3) is attached to the center (2). A method of installing a reinforcing bar unit in a concrete placing space in a tunnel, wherein the reinforcing unit is supported by a support (7) projecting into the concrete placing space (3). 3. A method for installing a reinforcing bar unit in a concrete placing space in a tunnel according to claim 1 or 2, wherein the moving frame (6) fed into the concrete placing space (3) includes a center (2). The method of installing a reinforcing bar unit in a concrete casting space in a tunnel, characterized in that the guide is provided by a guide tool (8) provided on the outer peripheral surface of (1). 4. A concrete placing space (3) between a tunnel (1) and a center (2) disposed inside a movable trolley (5) movable in the depth direction of the tunnel (1). A movable frame (6) capable of detachably supporting a rebar unit (4) that can be disposed therein and reciprocating in a depth direction of the tunnel (1); and a movable frame (6) in a concrete placing space (3). The rebar unit (4) supported by the moving frame (6) while being moved into the concrete can be fed into the concrete placing space (3), and the fed moving frame (6) can be moved into the concrete placing space (3). A frame drive mechanism (9) that can be sent back out of the unit. 5. The rebar unit installation apparatus according to claim 4, wherein the movable frame (6) and the frame drive mechanism (9) are attached at desired intervals in a circumferential direction of the movable carriage (5). Rebar unit installation equipment. 6. The moving rack (11) according to claim 4, wherein the moving frame (6) is reciprocated in the depth direction of the tunnel (1) by the frame driving mechanism (9). A support beam (12) reciprocally movable with the moving rack (11) and capable of supporting the rebar unit (4); and a support beam drive mechanism (7) for reciprocating the support beam (12) to the inner wall surface side of the tunnel. 13) A rebar unit installation device, comprising: 7. A guide for guiding a moving frame (6) fed into a concrete placing space (3) outside of a center (2) in the reinforcing bar unit installing apparatus according to any one of claims 4 to 6. A reinforcing bar unit installation device, comprising: a tool (8). 8. The reinforcing bar unit of a moving frame (6) fed into a concrete placing space (5) outside of the center (2) in the reinforcing bar unit installing apparatus according to any one of claims 4 to 7. 4) A rebar unit installation device comprising a support (7) for supporting (4).