CN109607384A - The turn-over method of super-large-diameter shield machine knife disk - Google Patents
The turn-over method of super-large-diameter shield machine knife disk Download PDFInfo
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- CN109607384A CN109607384A CN201910127597.9A CN201910127597A CN109607384A CN 109607384 A CN109607384 A CN 109607384A CN 201910127597 A CN201910127597 A CN 201910127597A CN 109607384 A CN109607384 A CN 109607384A
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- cutterhead
- crane
- gantry crane
- turn
- shield machine
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of turn-over methods of super-large-diameter shield machine knife disk, this method is located at the gantry crane in foundation pit construction place, more annular wire ropes and multiple shackles using a movable hoist, a rack, method includes the following steps: gantry crane and crane are moved on the ground by foundation pit first, make cutterhead between crane and gantry crane, the suspension centre on cutterhead is connected by annular wire rope with shackle to the suspension hook of gantry crane and the suspension hook of crane;Gantry crane and crane coordinating operation are manipulated, turning over cutterhead by horizontality is vertical state.The turn-over method of super-large-diameter shield machine knife disk provided by the invention can be safe and reliable realization super-large-diameter shield machine knife disk turn operation, and use gantry crane and movable crane coordinating operation, gantry crane can directly be built above foundation pit, reduce the occupancy for being used for the engineering machinery of cutterhead turn to construction site, from without extending to construction site, construction cost is reduced.
Description
Technical field
The present invention relates to shield machine package technique fields, and in particular to a kind of turn side of super-large-diameter shield machine knife disk
Method.
Background technique
The construction site in many tunnels is located at more crowded city or remoter remote mountains, for example urban subway tunnel, wears
Mountain railway tunnel wears mountain vcehicular tunnel, and the construction site of these Tunnel Engineering is often hard up or engineering equipment is difficult to reach and apply
Work scene, brings difficulty to some construction operations, for example, cutter head of shield machine be before installation of going into the well in horizontality, and
Cutterhead needs installation of going into the well with vertical state, therefore cutterhead goes into the well and needs to carry out turn operation before, usually uses two shoes
Band hangs coordinating operation and turns over to cutterhead, and still, on construction ground in more crowded situation, construction site is difficult to accommodate simultaneously
Two crawler cranes, and the weight of cutterhead is bigger, size is bigger, and the lifting capacity and volume of the crawler crane for turn are also got over
Greatly, e.g., the super-large-diameter shield machine knife disk for 500 tons or more needs the crawler crane coordinating operation using two up to 30 meters
It is turned over, if construction site is narrow, two heavy crawler hangings are moved inconvenient, and operation safety coefficient is low, and job scheduling
Slowly.
Therefore, for the turn operation of super-large-diameter shield machine knife disk, it is desirable that construction site spaciousness enough is in order to crawler belt
Movement is hung, and if need to carry out extensive enclosing to urban road in Construction of City Tunnel place or be dismantled to building
Can just there be the construction site of enough spaciousnesses, interference be brought to urban road normal pass, resident's normal life, if it is remote mountains tunnel
Road engineering needs to extend construction site, the road for being passed through remote mountains, construction cost is caused to rise on a large scale.
For these reasons, it is necessary to provide it is a kind of safe and reliable, can guarantee construction speed, can be relatively tight on construction ground
The method that super-large-diameter shield machine knife disk is turned in the Tunnel Engineering opened.
Summary of the invention
The present invention is intended to provide a kind of turn-over method of super-large-diameter shield machine knife disk, solves super-large diameter in the prior art
The technical issues of being difficult to turn over by horizontality as vertical state when cutter head of shield machine is installed.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of turn-over method of super-large-diameter shield machine knife disk is provided, this method is located at using a movable hoist, a rack
The gantry crane in foundation pit construction place and rigging for binding cutterhead, this method specifically include the following steps:
(1) cutterhead suspension centre is bound:
(1.1) gantry crane and crane move on the ground by foundation pit, so that the cutterhead is located at the crane and dragon
Between gantry crane;
(1.2) suspension centre on the cutterhead close to the gantry crane side is connected into described gantry with shackle by annular wire rope
The suspension hook hung, the rated load weight G1 of the gantry crane are greater than the weight G2 of the cutterhead, enable the gantry crane independent
Lift by crane the cutterhead;
(1.3) described in connecting the suspension centre on the cutterhead close to the crane side with shackle by the annular wire rope
The suspension hook of crane;
(2) cutterhead turns over: manipulating the gantry crane and crane coordinating operation, completes the turn operation of the cutterhead, makes described
It is vertical state that cutterhead is turned over by horizontality.
Preferably, the step (2) specifically includes:
(2.1) suspension hook of the suspension hook of the crane and the gantry crane is slowly promoted simultaneously, and the crane cooperates the dragon
The cutterhead is hung ground by gantry crane;
(2.2) suspension hook of the crane is motionless, and the suspension hook of the gantry crane is slowly promoted, by the cutterhead turn over to level
Ground is in A angle;
(2.3) suspension hook of the crane slowly declines, and the respective side decentralization of the cutterhead is supported on the sleeper padded;
(2.4) suspension hook of the gantry crane is slowly promoted, while being adjusted the gantry crane and slowly being drawn close to the cutterhead side, directly
To cutterhead state in a vertical shape.
Preferably, the side of the cutterhead is equipped at least one main lifting lug, and the main lifting lug can bear the weight of the cutterhead
Amount is equipped at least one auxiliary lifting lug with the main lifting lug opposite side;In the step (1.1), the gantry crane is located at institute
Main lifting lug side is stated, the crane is located at the auxiliary lifting lug side.
Preferably, the suspension hook on the gantry crane is twin beams suspension hook, in the step (1.2), the two of the gantry crane
A suspension hook respectively passes through a shackle and at least one annular wire rope is connect with the suspension centre of the cutterhead.
Preferably, the suspension hook on the crane is twin beams suspension hook, in the step (1.3), the two of the crane
A suspension hook respectively passes through a shackle and at least one annular wire rope is connect with the suspension centre of the cutterhead.
Preferably, for the track for gantry crane walking by welding spelling place where the cutterhead and described
The cutterhead for being located at welding spelling place is moved to by foundation pit before the step (1) by the gantry crane by foundation pit.
Preferably, in the step (2.2), the range of the A angle is 60-70 °.
Preferably, the cutterhead is turned over by horizontality as after vertical state, the gantry crane is slowly moved to the base
Right above hole, the suspension hook of the gantry crane, which slowly declines, makes the cutterhead go into the well installation.
Preferably, rated load weight G1 >=1.2G2 of the gantry crane.
Preferably, construction site of this method for twin tunnel side by side, two tunnels respectively where construction site on divide
It is not equipped with operation track corresponding with the gantry crane, is equipped with cross moving track between the operation track described in two groups, so that
The gantry crane can be by the cross moving track by a group job track travel to another group job track, for two
The cutterhead for the shield machine installed in tunnel distinguishes hoisting and overturning.
The beneficial technical effect of the present invention lies in:
1. the turn-over method of super-large-diameter shield machine knife disk provided by the invention is cooperated using gantry crane and movable crane
Operation, the turn operation of realization super-large-diameter shield machine knife disk that can be safe and reliable.
2. gantry crane can directly be built above foundation pit, reduces the engineering machinery turned over for cutterhead and construction site is accounted for
With, so that cutterhead turn-over method of the present invention can be used for the Tunnel Engineering of construction site anxiety, from without being extended to construction site,
Reduce construction cost.
3. the turn-over method of super-large-diameter shield machine knife disk provided by the invention is in twin tunnel engineering side by side, it can lead to
It crosses a gantry crane and turn operation is carried out to the cutter head of shield machine installed in two tunnels, can reduce and once gantry crane is built
Work reduces workload, accelerates construction progress.
Detailed description of the invention
Fig. 1 is the structural representation for the cutterhead that one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention is turned over
Figure;
Schematic diagram cutterhead is just is sling by Fig. 2 in one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention when;
Fig. 3 be super-large-diameter shield machine knife disk of the present invention one embodiment of turn-over method in translation lifting lug pass through annular wire rope,
The schematic diagram of the twin beams suspension hook of shackle and gantry crane connection;
Fig. 4 is that cutterhead is sling showing when turning over 46 ° in one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention
It is intended to;
Fig. 5 is that cutterhead is sling showing when turning over 68 ° in one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention
It is intended to;
Fig. 6 is that cutterhead is sling turn in one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention is vertical state
When schematic diagram;
Fig. 7 is when one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention is turned over for twin tunnel cutterhead side by side
Construction site schematic diagram;
Fig. 8 is the left view of gantry crane used in one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention;
Fig. 9 is the main view of gantry crane used in one embodiment of turn-over method of super-large-diameter shield machine knife disk of the present invention.
In figure, each label signal are as follows: 11, first main piece 111, second main piece 112, main piece 113, the 4th main piece of third of cutterhead
114, the 5th main piece 115, the 6th main piece 116, translation lifting lug 117, main lifting lug 118, auxiliary lifting lug 119, crane 12, gantry crane
13, twin beams suspension hook 131, annular wire rope 141, shackle 142, ground 15, Zuo Zuoye track 161, left welding spelling place 162,
Left foundation pit 163, right operation track 171, backhand welding connect spelling place 172, cross moving track 181.
Specific embodiment
Illustrate a specific embodiment of the invention with reference to the accompanying drawings and examples, but following embodiment is used only in detail
It describes the bright present invention in detail, does not limit the scope of the invention in any way.
Embodiment 1:
Also referring to Fig. 1 to Fig. 6.
The turn-over method of super-large-diameter shield machine knife disk provided in an embodiment of the present invention is used for shield machine knife shown in FIG. 1
Disk 11 is turned over, more than 500 tons of 11 weight of cutter head of shield machine, and by 1 piece of central block, 6 pieces main piece, 6 pieces of auxiliary piece of compositions are place shields
Single lifting diameter is maximum during the assembling of structure machine, the most heavy component of weight.Since 11 size of cutterhead is big, weight is big, cutterhead
11 whole inconvenient transports, therefore, by 1 piece of central block of cutterhead 11,6 pieces main piece, 6 pieces auxiliary piece directly for assembling shield machine
Welding spelling place welding near foundation pit is completed, and is transferred near foundation pit later, is avoided long-distance transportation.
As shown in Figure 1, cutterhead 11 is equipped with multiple lifting lugs for lifting, these lifting lugs include second main piece of cutterhead 11
112, main piece 113 of third, the 5th main piece 115, four translation lifting lugs 117 of the 6th main piece 116 of front setting, first main piece
Two main lifting lugs 118 of 111 edge setting, two auxiliary lifting lugs 119 of the 4th main piece 114 of edge setting, translate lifting lug
117 bind when mobile for the horizontal lifting of cutterhead 11, and main lifting lug 118 and auxiliary lifting lug 119 are bound when turning over for cutterhead 11.
As shown in Fig. 2, the turn-over method of super-large-diameter shield machine knife disk provided in an embodiment of the present invention uses a crawler belt
The crane 12 of formula and 13 coordinating operation of gantry crane, and used using more annular wire ropes and the rigging component of multiple shackles
In cutterhead 11 is bundled on the suspension hook of crane 12 and gantry crane 13, wherein the track for walking for gantry crane 12 passes through
Welding spelling place and foundation pit where cutterhead 11, and the suspension hook on crane 12 and gantry crane 13 is twin beams suspension hook, lifting
30 meters of main force's brachium of machine 12.
Two main lifting lugs 118 can bear the weight of cutterhead 11, and the rated load weight G1 of gantry crane 13 is 650 tons, is greater than
The weight G2 of cutterhead 11 guarantees that gantry crane 13 can be sling cutterhead 11 with vertical state by two main lifting lugs 118.
The turn-over method of super-large-diameter shield machine knife disk provided in an embodiment of the present invention specifically include the following steps:
(1) cutterhead 11 for being located at welding spelling place is moved to by foundation pit by gantry crane 13.
In this step, cutterhead 11 is translated by lifting lug 117 and gantry crane 13 by annular wire rope and shackle first
Twin beams suspension hook connection, as shown in figure 3, passing through the annular wire rope of a φ 120mm × 12m in each translation lifting lug 117
141, the both ends of annular wire rope 141 are set in shackle 142, and shackle 142 is hung on the translation lifting lug 117 of cutterhead 11.
The annular wire rope 141 connecting with the translation lifting lug 117 on main piece 113 of second main piece 112 and third is using specified
The shackle that lifting capacity is 200 tons, the annular wire rope being connect with the translation lifting lug 117 on the 5th main piece 115 and the 6th main piece 116
141 use rated load weight for 150 tons of shackle, and the suspension hook of the every side of twin beams suspension hook 131 hangs a rated load weight and is
The shackle that 150 tons of shackle and a rated load weight are 200 tons.
After binding, gantry crane 13 slings the 1m from the ground of cutterhead 11, then lifts cutterhead 11 and is slowly moved to apart from base
It cheats on the ground at 2m, then cutterhead 11 is put in above sleeper.
(2) cutterhead suspension centre binding before turning over:
(2.1) gantry crane 13 and crane 12 are moved on the ground 15 by foundation pit, so that cutterhead 11 is located at crane 12 and dragon
Between gantry crane 13, at this point, gantry crane 13 is located at main 118 side of lifting lug of cutterhead 11, and crane 12 is located at auxiliary lifting lug 119 1
Side, the main force's arm and ground for adjusting crane 12 are in 65 ° of angles.
(2.2) the main lifting lug 118 of cutterhead 11 is connected by annular wire rope with shackle to the suspension hook of gantry crane 13.Gantry crane
13 pass through the main lifting lug that annular wire rope, 2 rated load weights of 2 φ 120mm × 12m are that 400 tons of shackles are hung on cutterhead 11
On 118, wherein each main lifting lug 118 passes through an annular wire rope, and each annular wire rope passes through a shackle difference
It is suspended on two suspension hooks of gantry crane 13.
(2.3) the auxiliary lifting lug 119 on cutterhead 11 is connected by annular wire rope with shackle to the suspension hook of crane 12.?
In the step, the shackle for the use of the annular wire rope of 4 φ 90mm × 12m, 2 rated load weights being altogether 200 tons, wherein every
One auxiliary lifting lug 119 passes through the annular wire rope of two φ 90mm × 12m, two φ on each auxiliary lifting lug 119
The annular wire rope of 90mm × 12m is suspended on a suspension hook of gantry crane 13 by the shackle that a rated load weight is 200 tons
On.
The binding of cutterhead suspension centre terminates before turning over.
(3) cutterhead turns over: manipulation gantry crane 13 and 12 coordinating operation of crane complete the turn operation of cutterhead 11, make knife
It is vertical state that disk 11 is turned over by horizontality.The step (3) specifically includes:
(3.1) firstly, crane 12 is matched as shown in Fig. 2, the suspension hook of crane 12 and the suspension hook of gantry crane 13 are slowly promoted simultaneously
Cutterhead 11 is hung ground by closure gantry crane 13;
(3.2) as shown in figure 4, the suspension hook of crane 12 is motionless after cutterhead 11 hangs 1 meter of ground, the suspension hook of gantry crane 13 is slow
It is slow to be promoted, while crane 12 is slowly drawn close to gantry crane 13, tilts cutterhead 11 gradually in the sky.
(3.3) cutterhead 11 is turned over to, in after 65 ° of angles, the suspension hook of crane 12 slowly declines, by knife with level ground
The respective side decentralization of disk 11 is supported on the sleeper padded;
(3.4) as shown in figure 5, crane 12 is hung after the side decentralization that cutterhead 11 is located at crane 12 is supported on sleeper
Hook no longer applies lifting force, and the suspension hook of gantry crane 13 is slowly promoted, while adjusting gantry crane 13 and slowly drawing close to 11 side of cutterhead,
Until cutterhead 11 is in vertical state shown in fig. 6.
Finally, cutterhead 11 is turned over by horizontality as after vertical state, gantry crane 13 is slowly moved to right above foundation pit, dragon
The suspension hook of gantry crane 13, which slowly declines, makes cutterhead 11 go into the well installation.
Embodiment 2
Fig. 7 is please referred to Fig. 9.
Construction field of the turn-over method of super-large-diameter shield machine knife disk provided in an embodiment of the present invention for twin tunnel side by side
Close, two tunnels each by a shield machine construction, two tunnels respectively where construction site on be equipped with respectively with it is imperial
The corresponding operation track of gantry crane, is equipped with cross moving track between two group job tracks, so that gantry crane can pass through cross moving track
By on a group job track travel to another group job track, for the cutterhead difference to the shield machine installed in two tunnels
Hoisting and overturning.
Specifically, as shown in fig. 7, being equipped with left operation track 161, Zuo Zuoye rail on construction site where the tunnel of left side
Road 161 pass through left side tunnel where construction site on for the left welding spelling place 162 of spelling cutterhead and for assembling
The left foundation pit 163 of shield machine, so that cutterhead can be moved near left foundation pit 163 by gantry crane 13 by left welding spelling place 162;
Right operation track 171, applying where the tunnel of the right process of operation track 171 right side are equipped on construction site where the tunnel of right side
The backhand welding for spelling cutterhead of workshop ground connects spelling place 172 and the right foundation pit 173 for assembling shield machine, so that gantry
It hangs 13 and cutterhead can be connect spelling place 172 by backhand welding and be moved near right foundation pit 173;In left operation track 161 and right operation rail
Cross moving track 181 is equipped between road 171.
As shown in Figure 8 and Figure 9, gantry crane 13 has four support posts, has one group eight below each support post
Traveling wheel, gantry crane 13 share four groups of 32 traveling wheels, wherein 16 traveling wheels of the same side support post bottom exist
It walks on same track, i.e., the traveling wheel of two left support column bottoms is located on same track, two right support column bottoms
The traveling wheel in portion is located on same track, when gantry crane is walked along longitudinal direction, by two rails, and left operation track
161 and the gauges of two rails on right operation track 171 be corresponding to it.
The traveling wheel of 13 bottom of gantry crane can be rotated 90 degree, when gantry crane 13 turns over cutterhead in left side tunnel
Afterwards, gantry crane 13 is moved to cross moving track 181 and left 161 junction of operation track, the traveling wheel rotation 90 of 13 bottom of gantry crane
Degree, is consistent direction of the traveling wheel direction with cross moving track 181, and arrives right operation rail by the walking of cross moving track 181
On road 171, turn operation is carried out with the cutterhead for installing to right side tunnel.
Here cross moving track 181 has four rails, and the traveling wheel of 13 bottom of gantry crane all after 90 degree of rotation, turns to
Distance is consistent with the gauge of four rails of cross moving track 181 between traveling wheel afterwards, two root support post bottoms of every side
The traveling wheel in portion occupies two rails can with four groups of wheels on four tracks of chain block sync pulling cross moving track 181
Slow mobile gantry hangs 13 to the operation track on right side, again will be whole when gantry crane 13 moves on to the operation track on right side
Traveling wheel is rotated by 90 °, and completes to become rail.
The present invention is described in detail above in conjunction with drawings and examples, still, those of skill in the art
Member is it is understood that without departing from the purpose of the present invention, can also carry out each design parameter in above-described embodiment
Change, forms multiple specific embodiments, is common variation range of the invention, is no longer described in detail one by one herein.
Claims (10)
1. a kind of turn-over method of super-large-diameter shield machine knife disk, which is characterized in that this method uses a movable hoist, one
Rack is located at the gantry crane in foundation pit construction place and the rigging for binding cutterhead, this method specifically include the following steps:
(1) cutterhead suspension centre is bound:
(1.1) gantry crane and crane move on the ground by foundation pit, so that the cutterhead is located at the crane and dragon
Between gantry crane;
(1.2) suspension centre on the cutterhead close to the gantry crane side is connected into described gantry with shackle by annular wire rope
The suspension hook hung, the rated load weight G1 of the gantry crane are greater than the weight G2 of the cutterhead, enable the gantry crane independent
Lift by crane the cutterhead;
(1.3) described in connecting the suspension centre on the cutterhead close to the crane side with shackle by the annular wire rope
The suspension hook of crane;
(2) cutterhead turns over: manipulating the gantry crane and crane coordinating operation, completes the turn operation of the cutterhead, makes described
It is vertical state that cutterhead is turned over by horizontality.
2. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that the step (2)
It specifically includes:
(2.1) suspension hook of the suspension hook of the crane and the gantry crane is slowly promoted simultaneously, and the crane cooperates the dragon
The cutterhead is hung ground by gantry crane;
(2.2) suspension hook of the crane is motionless, and the suspension hook of the gantry crane is slowly promoted, by the cutterhead turn over to level
Ground is in A angle;
(2.3) suspension hook of the crane slowly declines, and the respective side decentralization of the cutterhead is supported on the sleeper padded;
(2.4) suspension hook of the gantry crane is slowly promoted, while being adjusted the gantry crane and slowly being drawn close to the cutterhead side, directly
To cutterhead state in a vertical shape.
3. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that the one of the cutterhead
Side is equipped at least one main lifting lug, and the main lifting lug can bear the weight of the cutterhead, is equipped with extremely with the main lifting lug opposite side
A few auxiliary lifting lug;In the step (1.1), the gantry crane is located at the main lifting lug side, and the crane is located at
The auxiliary lifting lug side.
4. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that on the gantry crane
Suspension hook be twin beams suspension hook, in the step (1.2), two suspension hooks of the gantry crane respectively pass through a shackle and at least one
Root annular wire rope is connect with the suspension centre of the cutterhead.
5. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that on the crane
Suspension hook be twin beams suspension hook, in the step (1.3), two suspension hooks of the crane respectively pass through a shackle and at least one
Root annular wire rope is connect with the suspension centre of the cutterhead.
6. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that for supplying the dragon
The track of gantry crane running pass through the cutterhead where welding spelling place and the foundation pit pass through before the step (1)
The cutterhead for being located at welding spelling place is moved to by foundation pit by the gantry crane.
7. the turn-over method of super-large-diameter shield machine knife disk according to claim 2, which is characterized in that in the step
(2.2) in, the range of the A angle is 60-70 °.
8. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that the cutterhead is by water
Level state is turned over as after vertical state, the gantry crane is slowly moved to right above the foundation pit, and the suspension hook of the gantry crane is slow
Slow decline makes the cutterhead go into the well installation.
9. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that the gantry crane
Rated load weight G1 >=1.2G2.
10. the turn-over method of super-large-diameter shield machine knife disk according to claim 1, which is characterized in that this method is used for
The construction site of twin tunnel side by side, two tunnels respectively where construction site on be equipped with respectively it is corresponding with the gantry crane
Operation track is equipped with cross moving track between the operation track described in two groups, so that the gantry crane can pass through the traversing rail
Road is by a group job track travel to another group job track, for the cutterhead to the shield machine installed in two tunnels point
Other hoisting and overturning.
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CN111606181A (en) * | 2020-05-28 | 2020-09-01 | 中铁工程装备集团有限公司 | Detachable lifting lug mechanism for shield cutter head and hoisting method thereof |
CN117188224A (en) * | 2023-08-22 | 2023-12-08 | 中铁十一局集团有限公司 | Recyclable track beam and construction method thereof |
CN117188224B (en) * | 2023-08-22 | 2024-03-08 | 中铁十一局集团有限公司 | Recyclable track beam and construction method thereof |
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