CN210594945U - Movable hoisting operation frame for bridge floor wet joint construction - Google Patents
Movable hoisting operation frame for bridge floor wet joint construction Download PDFInfo
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- CN210594945U CN210594945U CN201921118908.7U CN201921118908U CN210594945U CN 210594945 U CN210594945 U CN 210594945U CN 201921118908 U CN201921118908 U CN 201921118908U CN 210594945 U CN210594945 U CN 210594945U
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- wet joint
- bridge floor
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Abstract
The utility model relates to a portable hoist and mount operation frame of wet seam construction of bridge floor uses in the wet seam construction field of bridge floor, and its technical scheme main points are: a movable hoisting operation frame for bridge floor wet joint construction comprises operation frames erected on bridge floors on two sides of a wet joint, wherein a cross beam is arranged on each operation frame, an electric hoist is arranged on each cross beam, a cable is wound on a hook of each electric hoist, lifting hooks are fixedly arranged at two ends of each cable respectively, and the bottom of each operation frame is rotatably connected with four universal wheels respectively; has the technical effects that: the prefabricated wet joint plate can be continuously hoisted and installed on the bridge floor, time and labor are saved, and the working efficiency of bridge floor wet joint construction is improved.
Description
Technical Field
The utility model belongs to the technical field of the wet seam construction of bridge floor's technique and specifically relates to a portable hoist and mount operation frame of wet seam construction of bridge floor is related to.
Background
The wet joint refers to the joint that the prestressed concrete beam body is prefabricated in blocks, and when the cantilever is assembled into a large-span continuous beam, the beam body is connected into a whole by adopting cast-in-place concrete.
At present, the wet joint of the bridge deck of the cross-railway bridge mostly adopts a mode of paving a reinforced concrete precast slab at the bottom and pouring concrete at the upper part. At present, when the reinforced concrete precast slabs are laid on the wet joints of the bridge deck, the mode of manually lifting or building a simple fixed operation frame is mostly adopted for laying, time and labor are wasted, and the working efficiency is lower.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a portable hoist and mount operation frame of wet seam construction of bridge floor, its advantage: the prefabricated wet joint plate can be continuously hoisted and installed on the bridge floor, time and labor are saved, and the working efficiency of bridge floor wet joint construction is improved.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a portable hoist and mount operation frame of wet seam construction of bridge floor, contains to erect the operation frame on the bridge floor of wet seam both sides, be equipped with the crossbeam on the operation frame, be equipped with electric block on the crossbeam, around being equipped with the cable on electric block's the couple, the both ends of cable have set firmly the lifting hook respectively, the bottom of operation frame is rotated respectively and is connected with four universal wheels.
Through the technical scheme, the operation frame can move in a rolling mode on the bridge floor through four universal wheels, a worker can push the operation frame to drive the electric hoist on the cross beam to move to the position above the prefabricated plate, the electric hoist is started to lower the hook, so that the two lifting hooks move downwards to the prefabricated plate under the influence of self gravity, then the two lifting hooks are respectively hooked on the two lifting rings on the prefabricated plate, the electric hoist is started to pull the hook upwards, the cable on the hook can be tensioned to drive the lifting hooks at the two ends of the cable to move upwards, the lifting hooks pull the lifting rings to integrally lift the prefabricated plate, then the worker can push the operation frame to drive the prefabricated plate to move to the position above the specified mounting position, the electric hoist is started to lower the prefabricated plate to be mounted at the specified position, the lifting hooks are taken down from the lifting rings, then the operation frame is pushed, the staff can promote the operation frame and move on the bridge floor and realize the effect of the wet seam prefabricated plate of hoist and mount installation in succession, and labour saving and time saving has improved the work efficiency of the wet seam construction of bridge floor.
The utility model discloses further set up to: the electric hoist bolt connection structure is characterized in that a groove is formed in the cross beam, a first opening is formed in the bottom of the groove, a guide rail groove is formed in the groove in two sides of the first opening, an adjusting frame is erected in the groove, a plurality of electric wheels are connected to the adjusting frame in a rotating mode and move in the guide rail groove, a connecting plate with one end penetrating through the first opening is arranged on the adjusting frame, and the connecting plate penetrates through the one end penetrating through the first opening and is connected with an electric hoist bolt below the cross beam.
Through the technical scheme, after the prefabricated plate is lifted by the operation frame and moves to the position above the appointed installation position, a worker can start the electric wheels to drive the adjusting frame to move along the direction of the guide rail groove, the electric hoist can move along with the adjusting frame along the direction of the guide rail groove, so that the prefabricated plate hoisted below the electric hoist is driven to move along the direction of the guide rail groove, the worker can adjust the position of the prefabricated plate to be aligned with the wet joint, the phenomenon that the prefabricated plate is slightly deviated from the relative position of the wet joint after being hoisted to a preset position is reduced, the worker is troublesome and time-consuming in a mode of adjusting the alignment by pushing the operation frame, and further the possibility of influencing the installation efficiency is reduced; thereby further promoting the work efficiency of the wet joint construction of the bridge deck.
The utility model discloses further set up to: the utility model discloses a damping device, including operation frame, connecting pipe, damping rod, universal wheel, connecting pipe, second trompil, damping rod, fixed plate, four, universal wheel rotate respectively and connect on four fixed plates, the operation frame bottom is equipped with four connecting pipes respectively, four the one end that the operation frame was kept away from to the connecting pipe sets firmly and is used for sealing the orificial baffle of connecting pipe, the second trompil has been seted up on the baffle, wear to be equipped with the damping rod who mutually supports with the second trompil in the second trompil, the one end that the damping rod is located the connecting pipe outside is equipped with and.
Through above-mentioned technical scheme, the operation frame is erect on the universal wheel through the spring on the shock-absorbing rod, and when the universal wheel passes through unevenness's bridge floor, the elastic restoring force after the spring is compressed can offset the momentum that partly universal wheel rises suddenly or falls to slowed down the operation frame along with the condition of universal wheel shake from top to bottom, had the absorbing effect, when having reduced through unevenness's bridge floor, the shake range is great from top to bottom on the operation frame, leads to the possibility that the prefabricated plate drops.
The utility model discloses further set up to: the shock absorption rod is provided with a limiting plate on the end face, located in the connecting pipe, of the shock absorption rod, the limiting plate is located in the connecting pipe and moves along the connecting pipe, and the outer periphery of the limiting plate is larger than that of the second opening.
Through above-mentioned technical scheme, the connecting pipe rebound take the altitude back alone, the limiting plate can support tightly on the baffle of connecting pipe bottom for the shock attenuation pole that is connected with the limiting plate is difficult to break away from the connecting pipe from the second trompil, touch protruding road surface and upwards bounce suddenly when having reduced operation frame translation rate when very fast, the connecting pipe rebound under the drive of operation frame, make the shock attenuation pole break away from the second trompil of connecting pipe, lead to the operation frame to be difficult to continue the possibility of normal work.
The utility model discloses further set up to: the connecting pipe is characterized in that an extension plate is arranged on the pipe wall of the connecting pipe, a threaded shaft penetrates through the extension plate and is in threaded connection with the extension plate, and a brake block is rotatably connected to one end, facing the bridge floor, of the threaded shaft.
Through the technical scheme, after the prefabricated plate is lifted by the operation frame and moves to the upper side of the specified installation position, the worker can rotate the threaded shaft downwards, so that the brake block is abutted against the bridge floor under the driving of the threaded shaft, the friction force between the operation frame and the bridge floor is increased, the operation frame is difficult to continue to move, the operation frame is fixed to the position, the situation that the prefabricated plate is placed downwards and moved by the operation frame in a process of driving the prefabricated plate to move, the installation position of the prefabricated plate is deviated, and the construction effect is influenced is reduced.
The utility model discloses further set up to: the operation frame is provided with a first safety rod and a second safety rod on two end faces perpendicular to the cross beam, the first safety rod is provided with two safety ropes, one ends, far away from the first safety rod, of the two safety ropes are provided with hooks respectively, and the second safety rod is provided with hanging rings matched with the hooks respectively.
Through above-mentioned technical scheme, the operation frame is in the back of hoisting the prefabricated plate, and the staff can be hung to the couple of second safety lever through the couple respectively with two safety ropes on the first safety lever, and two safety ropes are located the both sides position down of prefabricated plate respectively, and when the prefabricated plate took place the condition of falling, two safety ropes can be respectively the pocket at the both ends of prefabricated plate for the prefabricated plate is difficult to continue to fall, has reduced on the prefabricated plate falls the bridge floor, with the bridge floor possibility of damage after bumping.
The utility model discloses further set up to: and fastening plates are respectively and crossly arranged on two end surfaces of the operation frame parallel to the cross beam.
Through above-mentioned technical scheme, alternately the mounting plate that sets up constitutes triangle-shaped stable structure with the operation frame, has promoted the structural stability of operation frame, has reduced the operation frame and has received heavily to press, and the unbalanced barycenter leads to the operation frame to the scattered possibility of putting up of one side slope.
The utility model discloses further set up to: the one end that the brake block was kept away from to the screw shaft is equipped with the rolling disc, the bottom of brake block is equipped with anti-skidding bead.
Through the technical scheme, a worker can easily drive the rotating shaft to rotate by grasping the rotating disc with hands, so that the brake block is conveniently abutted against the bridge floor; the anti-skidding convex ribs at the bottom of the brake block increase the surface roughness of the bottom of the brake block, so that the friction resistance between the brake block and a bridge floor is increased, and the possibility of the operation frame slipping back is further reduced.
To sum up, the utility model discloses a beneficial technological effect does:
1. the movable hoisting operation frame can continuously hoist and mount the wet joint precast slabs on the bridge floor, so that time and labor are saved, and the working efficiency of bridge floor wet joint construction is improved;
2. the brake block is tightly propped against the bridge floor, so that the back-sliding condition of the operation frame is reduced;
3. the safety rope has the effect of preventing the prefabricated plate from falling, and reduces the possibility of falling and breaking the prefabricated plate.
Drawings
Fig. 1 is a schematic view of the overall structure of the present embodiment.
FIG. 2 is a schematic cross-sectional view of a portion of the present embodiment for embodying a shock absorbing rod.
Fig. 3 is a schematic structural diagram of a portion of the adjusting bracket according to the present embodiment.
Fig. 4 is a schematic structural diagram of a safety rope portion according to the embodiment.
Fig. 5 is an enlarged view at a in fig. 4.
Reference numerals: 1. wet seaming; 2. a bridge deck; 3. an operation frame; 4. prefabricating a slab; 5. a hoisting ring; 6. a cross beam; 7. an electric hoist; 8. a cable; 9. a hook; 10. a universal wheel; 11. grooving; 12. a first opening; 13. a guide rail groove; 14. an adjusting bracket; 15. an electric wheel; 16. a connecting plate; 17. a connecting pipe; 18. a baffle plate; 19. a second opening; 20. a shock-absorbing lever; 21. a propping plate; 22. a spring; 23. a fixing plate; 24. a limiting plate; 25. an extension plate; 26. a threaded shaft; 27. a brake block; 28. a first safety lever; 29. a second safety lever; 30. a safety cord; 31. hooking; 32. hanging a ring; 33. a fastening plate; 34. rotating the disc; 35. and (4) anti-slip ribs.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): the utility model provides a portable hoist and mount operation frame of wet seam construction of bridge floor, like figure 1 and figure 2, contain to erect operation frame 3 on wet seam 1 both sides bridge floor 2, operation frame 3 bottom has set firmly four connecting pipes 17 respectively, the one end that operation frame 3 was kept away from to connecting pipe 17 has set firmly and is used for sealing the orificial baffle 18 of connecting pipe 17, circular second trompil 19 has been seted up on the baffle 18, wear to be equipped with a shock attenuation pole 20 who matches each other with second trompil 19 in the second trompil 19, shock attenuation pole 20 is located one of connecting pipe 17 and serves and has set firmly circular limiting plate 24, limiting plate 24's size is set up to: the outer periphery of the limiting plate 24 is larger than the outer periphery of the second opening 19, the limiting plate is located in the connecting pipe 17 and moves up and down along the connecting pipe 17, one end, located outside the connecting pipe 17, of the shock absorption rod 20 is provided with a pressing plate 21, a spring 22 is sleeved on the shock absorption rod 20, the spring 22 is pressed between the baffle 18 and the pressing plate 21, a fixing plate 23 is arranged on the surface, deviating from the spring 22, of the pressing plate 21, and the fixing plate 23 is rotatably connected with the universal wheel 10. Therefore, the worker can push the operation frame 3 to move back and forth on the bridge deck 2, and the four universal wheels 10 reduce the friction resistance when the operation frame 3 moves, so that the worker can push the operation frame 3 to any position of the bridge deck 2 easily.
As shown in fig. 1 and 2, when the working frame 3 passes through the uneven bridge deck 2, the working frame 3 may shake up and down, so that the spring 22 is further compressed continuously, and the elastic restoring force when the spring 22 is compressed may counteract the momentum when a part of the working frame 3 falls down, therefore, the spring 22 has a shock-absorbing effect, and slows down the shaking degree when the working frame 3 passes through the uneven bridge deck 2, the limiting plate 24 serves to block the shock-absorbing rod 20 in the connecting pipe 17, and when the shaking amplitude of the working frame 3 is large, the limiting plate 24 may abut against the baffle 18 at the bottom of the connecting pipe 17, so that the shock-absorbing pipe is difficult to disengage from the second opening 19; after the construction is completed, when the operation frame 3 is integrally hoisted, the baffle 18 can be abutted against the limiting plate 24 to drive the damping rod 20 and the universal wheel 10 to be hoisted together, so that the possibility that the damping rod 20 can be separated from the operation frame 3 from the second opening 19 when the operation frame 3 is integrally hoisted is reduced.
As shown in fig. 2, an extension plate 25 is arranged on the wall of the connection pipe 17, a threaded shaft 26 is threaded on the extension plate 25, one end of the threaded shaft 26 facing the bridge deck 2 is rotatably connected with a brake block 27, the other end is provided with a rotating disc 34, and the bottom of the brake block 27 is provided with an anti-skid convex rib 35. Therefore, the worker can grasp the rotating disc 34 by hand to rotate, so as to drive the threaded shaft 26 to rotate, so that the brake block 27 is abutted against the bridge floor 2 under the driving of the threaded shaft 26, the friction resistance of the operation frame 3 moving on the bridge floor 2 is increased, the operation frame 3 is difficult to continue to move, the effect of fixing the operation frame 3 is realized, and the possibility that the operation frame 3 slides backwards along the bridge floor 2 is reduced. The anti-slip beads 35 further increase the frictional resistance when the working frame 3 is moved, making it more difficult for the working frame 3 to slip back along the deck 2.
As shown in fig. 3 and 4, a cross beam 6 is arranged on the operation frame 3, two lifting rings 5 are respectively arranged on the prefabricated plate 4, an electric hoist 7 is placed below the cross beam 6, a slot 11 is formed in the cross beam 6, a first opening 12 is formed in the bottom of the slot 11, guide rail slots 13 are formed in the slot 11 on two sides of the first opening 12, an adjusting frame 14 is erected in the slot 11, four electric wheels 15 moving in the guide rail slots 13 are rotatably connected to the adjusting frame 14, a connecting plate 16 with one end penetrating through the first opening 12 is fixedly arranged on the adjusting frame 14, one end penetrating through the first opening 12 of the connecting plate 16 is connected with the electric hoist 7 below the cross beam 6 through bolts, a cable 8 is wound on a hook 31 of the electric hoist 7, and lifting hooks 9 matched with the lifting rings 5 are respectively fixedly arranged at two ends of the. Therefore, the staff can push the operation frame 3 to the prefabricated plate 4 to be hoisted, start the electric block 7 and put down the couple 31, two lifting hooks 9 are influenced by self gravity and can also fall on the prefabricated plate 4, catch on two rings 5 on the prefabricated plate 4 with two lifting hooks 9 respectively, then start the electric block 7 and drive the couple 31 and move upwards, the cable 8 receives the pulling force of prefabricated plate 4 and the pulling force of couple 31 simultaneously and is strained, then drive the prefabricated plate 4 on the lifting hook 9 and move upwards along with the couple 31 together, thereby hoist the prefabricated plate 4, later promote the operation frame 3 and drive the prefabricated plate 4 and move to the top position that needs to place the wet seam 1 of prefabricated plate 4.
As shown in fig. 2 and 3, the worker can rotate the threaded shaft 26 to fix the operation frame 3 at the position, and then drive the electric wheel 15 on the adjusting frame 14, drive the adjusting frame 14 to move along the guide rail groove 13, the electric hoist 7 below the adjusting frame 14 and the precast slab 4 on the electric hoist 7 can move along with the adjusting frame 14, so as to adjust the position of the precast slab 4, so that the precast slab 4 is aligned with the position of the wet joint 1, then start the electric hoist 7 to put down and install the precast slab 4 into the wet joint 1, remove the hook 9 on the precast slab 4, and then push the operation frame 3 to perform the hoisting and installation of the next precast slab 4, therefore, the movable hoisting operation frame 3 can continuously hoist and install the precast slabs 4 of the wet joint 1 on the bridge floor 2, thereby saving time and labor, and improving the working efficiency of the construction of the wet joint 1 on the.
As shown in fig. 1, fastening plates 33 are provided to intersect with both end surfaces of the work frame 3 parallel to the cross member 6. The fastening plates 33 are crossed with the operation frame 3 to form a triangular stable structure, so that the structural stability of the operation frame 3 is enhanced, and the possibility that the operation frame 3 is scattered when the gravity center of the operation frame 3 deviates to one side due to the weight of the prefabricated plate 4 and the electric hoist 7 after the prefabricated plate 4 is lifted by the operation frame 3 is reduced.
As shown in fig. 4 and 5, a first safety rod 28 and a second safety rod 29 are respectively arranged on two end faces of the working frame 3 perpendicular to the cross beam 6, two safety ropes 30 are fixedly arranged on the first safety rod 28, hooks 31 are respectively arranged at one ends of the two safety ropes 30 far away from the first safety rod 28, and a hanging ring 32 matched with the hooks 31 is arranged on the second safety rod 29. Therefore, after the precast slab 4 is lifted by the electric hoist 7, the worker can hang the hooks 31 of the two safety ropes 30 on the hanging rings 32 respectively, so that the two safety ropes 30 are located at the positions below the two ends of the precast slab 4 respectively, and when the precast slab 4 falls during the moving process of the operation frame 3, the two safety ropes 30 can hold the precast slab 4 to prevent the precast slab 4 from continuing falling, thereby reducing the possibility that the precast slab 4 is damaged after falling onto the bridge floor 2 and colliding with the bridge floor 2.
The operation process is as follows: the staff promotes the operation frame 3 to the top of treating the prefabricated plate 4 of hoist and mount installation, start electric block 7 and hoist prefabricated plate 4, two safety rope 30 of installation live in with prefabricated plate 4, promote operation frame 3 and drive prefabricated plate 4 to the top of wet seam 1 mounted position, control about drive adjusting bracket 14, the position of adjusting prefabricated plate 4 is controlled to the removal about driving prefabricated plate 4, make it align with wet seam 1, take off two safety rope 30, drive electric block 7 puts down prefabricated plate 4, then install prefabricated plate 4 in the wet seam 1.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a portable hoist and mount operation frame of wet joint construction of bridge floor which characterized in that: contain and erect operation frame (3) on wet seam (1) both sides bridge floor (2), be equipped with two rings (5) on prefabricated plate (4) respectively, be equipped with crossbeam (6) on operation frame (3), be equipped with electric block (7) on crossbeam (6), around being equipped with cable (8) on couple (31) of electric block (7), the both ends of cable (8) set firmly respectively with rings (5) assorted lifting hook (9), the bottom of operation frame (3) is rotated respectively and is connected with four universal wheels (10).
2. The movable hoisting operation frame for bridge deck wet joint construction according to claim 1, wherein: offer fluting (11) on crossbeam (6), first trompil (12) have been seted up to the bottom of fluting (11), guide rail groove (13) have been seted up on fluting (11) of first trompil (12) both sides, fluting (11) inner tower is equipped with alignment jig (14), it is connected with a plurality of electronic wheels (15) to rotate on alignment jig (14), and is a plurality of electronic wheel (15) removes in guide rail groove (13), be equipped with connecting plate (16) that first trompil (12) were worn to establish by one end on alignment jig (14), electric block (7) bolted connection of the one end of first trompil (12) and crossbeam (6) below is worn to establish by connecting plate (16).
3. The movable hoisting operation frame for bridge deck wet joint construction according to claim 1, wherein: operation frame (3) bottom is equipped with four connecting pipes (17), four respectively the one end that operation frame (3) were kept away from in connecting pipe (17) sets firmly and is used for sealing orificial baffle (18) of connecting pipe (17), second trompil (19) have been seted up on baffle (18), wear to be equipped with in second trompil (19) and hold down the shock-absorbing rod (20) of mutually supporting with second trompil (19), the one end that shock-absorbing rod (20) are located outside connecting pipe (17) is equipped with and supports tight board (21), the cover is equipped with spring (22) on shock-absorbing rod (20), spring (22) are located baffle (18) and support between tight board (21), it is equipped with fixed plate (23) to support tight board (21) on deviating from spring (22), four universal wheel (10) rotate respectively and connect on four fixed plates (23).
4. The movable hoisting operation frame for bridge deck wet joint construction according to claim 3, wherein: be equipped with limiting plate (24) on the terminal surface that shock attenuation pole (20) are located connecting pipe (17), limiting plate (24) are located connecting pipe (17) and remove along connecting pipe (17), the outer peripheral edges of limiting plate (24) are greater than the outer peripheral edges of second trompil (19).
5. The movable hoisting operation frame for bridge deck wet joint construction according to claim 4, wherein: be equipped with extension board (25) on the pipe wall of connecting pipe (17), wear to establish and threaded connection has screw thread axle (26) on extension board (25), screw thread axle (26) are rotated towards the one end of bridge floor (2) and are connected with brake block (27).
6. The movable hoisting operation frame for bridge deck wet joint construction according to claim 1, wherein: be equipped with first safety lever (28) and second safety lever (29) on operation frame (3) and crossbeam (6) vertically both ends face respectively, be equipped with two safety rope (30) on first safety lever (28), two the one end that first safety lever (28) were kept away from in safety rope (30) is equipped with couple (31) respectively, be equipped with respectively on second safety lever (29) with couple (31) assorted link (32).
7. The movable hoisting operation frame for bridge deck wet joint construction according to claim 1, wherein: and fastening plates (33) are respectively arranged on two end surfaces of the operation frame (3) parallel to the cross beam (6) in a crossed manner.
8. The movable hoisting operation frame for bridge deck wet joint construction according to claim 5, wherein: one end of the threaded shaft (26) far away from the brake block (27) is provided with a rotating disc (34), and the bottom of the brake block (27) is provided with an anti-skidding convex rib (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921118908.7U CN210594945U (en) | 2019-07-16 | 2019-07-16 | Movable hoisting operation frame for bridge floor wet joint construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921118908.7U CN210594945U (en) | 2019-07-16 | 2019-07-16 | Movable hoisting operation frame for bridge floor wet joint construction |
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| Publication Number | Publication Date |
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| CN210594945U true CN210594945U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921118908.7U Active CN210594945U (en) | 2019-07-16 | 2019-07-16 | Movable hoisting operation frame for bridge floor wet joint construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554082A (en) * | 2020-12-04 | 2021-03-26 | 贵州大通路桥工程建设有限公司 | Method for hoisting newly-added pile foundation reinforcement cage in narrow space under bridge reinforcement bridge |
| CN112660993A (en) * | 2020-12-30 | 2021-04-16 | 中国建筑土木建设有限公司 | Box girder falling-prevention stop block mounting system and construction method |
-
2019
- 2019-07-16 CN CN201921118908.7U patent/CN210594945U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554082A (en) * | 2020-12-04 | 2021-03-26 | 贵州大通路桥工程建设有限公司 | Method for hoisting newly-added pile foundation reinforcement cage in narrow space under bridge reinforcement bridge |
| CN112660993A (en) * | 2020-12-30 | 2021-04-16 | 中国建筑土木建设有限公司 | Box girder falling-prevention stop block mounting system and construction method |
| CN112660993B (en) * | 2020-12-30 | 2022-11-18 | 中国建筑土木建设有限公司 | Box girder falling-prevention stop block mounting system and construction method |
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