Bridge hanging basket cast-in-place box girder bracket and using method thereof

Abstract

The application relates to the technical field of bridge construction equipment, in particular to a bridge hanging basket cast-in-situ box girder bracket and a using method thereof, which comprises a tensioning base, a stress relieving mechanism is fixedly arranged at the bottom of the tensioning base, a tensioning top plate is arranged at the top of the tensioning base, a plurality of sliding grooves are downwardly arranged at the top front end and the top rear end of the tensioning top plate, adjusting mechanisms are slidably arranged in the sliding grooves, and the stress relieving mechanism comprises two front and rear distributed lower I-shaped beams. By starting the two hydraulic gas rods in the stress relieving mechanism, the output rods of the two hydraulic gas rods are retracted, the transfer blocks are synchronously moved, a plurality of steel ropes are pulled, the end portions of the plurality of steel ropes are pulled downward to pull the bracket, the stress in the bracket is relieved, the quality of pouring is guaranteed, and compared with the existing operation mode of applying counterweights, the convenience and efficiency during operation are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology, specifically to a bridge hanging basket cast-in-place box girder support and its usage method. Background Technology

[0002] The so-called cantilever casting method refers to a construction method in which a platform is set up on each side of the pier for working, and concrete is poured segment by segment into the cantilevered equilibrium at the mid-span, with prestress applied to each segment to facilitate better solidification. The main equipment for this construction method consists of a pair of movable formworks that move on the beam segments that have been tensioned, anchored, and integrated with the pier body. Formwork erection, reinforcement binding, prestressing, and concrete pouring are all carried out on these formworks. After completing the construction of one segment, the formworks move symmetrically forward one segment to start the construction of the next pair of beam segments, and so on, until the cantilever beam segment is completed.

[0003] Currently, after the bridge hanging basket cast-in-place box girder brackets are erected, it is usually necessary to place an appropriate amount of counterweight sandbags on the brackets to apply gravity pressure to eliminate the stress inside the brackets. Therefore, after the stress inside the brackets is eliminated, the counterweight sandbags need to be removed one by one, which involves a large amount of work and a complicated operation process, which greatly limits the construction efficiency of bridge hanging basket cast-in-place box girder brackets. Summary of the Invention

[0004] To address this issue, the present invention provides a bridge hanging basket cast-in-place box girder bracket, which solves the problem that currently used bridge hanging basket cast-in-place box girder brackets typically require the placement of appropriate counterweight sandbags on the bracket after erection to apply gravity pressure and eliminate the bracket's stress, resulting in a large workload, cumbersome operation, and limited construction efficiency.

[0005] The present invention provides the following technical solution: a bridge hanging basket cast-in-place box girder support, including a tensioning base, a stress relief mechanism fixedly provided at the bottom of the tensioning base, a tensioning top plate provided at the top of the tensioning base, and multiple sliding grooves extending downward through the front end and rear end of the top of the tensioning top plate, with an adjustment mechanism slidably provided inside each of the multiple sliding grooves;

[0006] The stress relief mechanism includes two lower I-beams distributed front to back, which are fixedly connected to the bottom of the tensioning base. A fixed crossbeam is fixedly connected between the two lower I-beams, located at one end of each lower I-beam. Two hydraulic rods distributed front to back are fixedly connected to the bottom of the fixed crossbeam. A transfer block is fixedly connected to the output shaft ends of the two hydraulic rods. A steel cable is fixedly connected to the side of the transfer block away from the hydraulic rods. A bracket is fixedly connected to the end of the steel cable away from the transfer block. Support arms are fixedly connected to the bottom of each of the two lower I-beams away from the fixed crossbeam. A fixed roller is fixedly connected between the two support arms. The fixed roller is located at the bottom of the bracket, and an I-shaped wheel is rotatably connected to the outer wall of the fixed roller. The I-shaped wheel is engaged with the outer periphery of the steel cable.

[0007] The adjustment mechanism includes an adjustment block that slides inside a groove. A threaded hole is provided through the front of the adjustment block, and an adjustment screw is inserted through the threaded hole. The adjustment screw is connected to the threaded hole by a threaded engagement, and a rotating seat is rotatably connected to the outside of the adjustment screw. The rotating seat is fixedly connected to the top surface of the tensioning top plate.

[0008] As a preferred embodiment of the present invention, there are multiple steel cables, which are distributed in an equidistant linear array, and the number of I-shaped wheels corresponds one-to-one with the number and position of the steel cables.

[0009] As a preferred embodiment of the present invention, the fixed roller is located at the end near the support arm away from the lower I-beam.

[0010] As a preferred embodiment of the present invention, the top of the tensioning top plate is fixedly connected to two upper I-beams distributed front to back. The two upper I-beams are located between multiple adjustment mechanisms. The top of each of the two upper I-beams is fixedly connected to a supporting bend. The top of the two supporting bends is fixedly connected to two cantilever I-beams distributed left to right. The bottom of each of the two cantilever I-beams is fixedly connected to two tie arms distributed front to back. The bottom of the four tie arms is fixedly connected to the top of the bracket.

[0011] As a preferred embodiment of the present invention, a reinforcing rod is fixedly connected to the side wall of each of the two supporting bends, and the top end of the reinforcing rod is fixedly connected to one end of the top wall of the supporting bend.

[0012] As a preferred embodiment of the present invention, the supporting curved frame and the cantilever I-beam are fixedly connected by U-bolts.

[0013] As a preferred embodiment of the present invention, the tensioning base and the tensioning top plate are provided with multiple bolt holes extending downwards at both the top front end and the top rear end. The multiple bolt holes are arranged in an equidistant linear array. Each of the two bolt holes distributed vertically is fitted with a stud. The outer wall of the stud is threaded with a nut, and the top of the nut abuts against the bottom of the tensioning base.

[0014] As a preferred embodiment of the present invention, the bracket is located on one side of the tensioning base and the tensioning top plate, and the bracket is in clearance fit with the tensioning base and the tensioning top plate.

[0015] A method for using a bridge hanging basket cast-in-place box girder support includes the following steps:

[0016] S1. During installation, first place the tensioning top plate on the upper end of the bridge body and place the tensioning base on the bottom of the wall. Then, assemble and connect the tensioning base and the tensioning top plate with multiple studs, and screw multiple nuts onto the multiple studs. Thus, under the action of the spiral force, the tensioning base and the tensioning top plate are initially tensioned and fixed at the upper and lower positions of the bridge body.

[0017] S2. After the tensioning base and tensioning top plate are initially fixed, the two upper I-beams and supporting bends are fixed on the top of the tensioning top plate, and the two cantilever I-beams are fixed on the top of the two supporting bends. The bracket is then suspended on one side of the tensioning top plate using four tie arms. The bracket supports the formwork frame during the pouring of the bridge box girder. At the same time, by rotating each adjusting screw, the adjusting blocks connected to the adjusting screws through the threaded holes slide inside the groove, so that multiple adjusting blocks abut against both sides of the bridge body. By adjusting each adjusting screw, the front and rear positions of the tensioning base and tensioning top plate can be finely adjusted, thereby achieving fine adjustment of the front and rear positions of the bracket and avoiding misalignment during bridge body pouring.

[0018] S3. Then, the two hydraulic pneumatic rods are activated, and the output rods of the two hydraulic pneumatic rods retract, driving the transfer block to move synchronously, thereby pulling multiple steel cables. On the left side of multiple I-shaped wheels, the ends of multiple steel cables are pulled downward to the bracket, thereby eliminating the internal stress of the bracket and ensuring the quality of the pouring.

[0019] S4. After a section of the box girder bridge body is poured, the tensioning force of the tensioning base and tensioning top plate on the bridge body is released by loosening multiple nuts. At the same time, multiple adjusting screws are loosened, so that the adjusting block releases the squeezing force on the tensioning top plate. At this time, under the action of external force, the tensioning top plate can be pushed to move at the upper end of the bridge body, driving the bracket and adjusting mechanism to move synchronously, thereby moving the bracket to the next pouring area, thus improving the flexibility of the bracket.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, by activating the two hydraulic rods in the stress relief mechanism, the output rods of the two hydraulic rods retract, driving the transfer block to move synchronously, thereby pulling multiple steel cables and causing the ends of multiple steel cables to pull down on the left side of multiple I-shaped wheels, thereby eliminating the internal stress of the bracket and ensuring the quality of the casting. Compared with the existing method of applying counterweights, this greatly improves the convenience and efficiency of the operation.

[0022] 2. In this invention, by rotating the adjusting screw in the adjusting mechanism, the adjusting block, which is connected to the adjusting screw through the threaded hole, slides inside the slide groove, so that multiple adjusting blocks abut against both sides of the bridge body. By adjusting each adjusting screw, the front and rear positions of the tensioning base and the tensioning top plate can be finely adjusted, thereby achieving fine adjustment of the front and rear positions of the bracket and avoiding misalignment during bridge body pouring.

[0023] 3. In this invention, by setting multiple nuts to screw onto multiple studs, the tensioning base and tensioning top plate are initially tensioned and fixed at the upper and lower positions of the bridge body under the action of spiral force, which improves the stability of the bracket. After a section of the box girder bridge body is poured, the tensioning force of the tensioning base and tensioning top plate on the bridge body is released by loosening multiple nuts, and at the same time, multiple adjusting screws are loosened, so that the adjusting block releases the squeezing force on the tensioning top plate. At this time, under the action of external force, the tensioning top plate can be pushed to move at the upper end of the bridge body, driving the bracket and adjusting mechanism to move synchronously, thereby moving the bracket to the next pouring area, thus improving the flexibility of the bracket. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the top view structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the bottom view structure of the present invention;

[0026] Figure 3 This is a schematic diagram showing a partial structural detail of the present invention;

[0027] Figure 4 This is a schematic diagram of the adjustment mechanism structure of the present invention;

[0028] Figure 5 and Figure 6 All of these are schematic diagrams of the stress relief mechanism of the present invention.

[0029] Figure 7 This is a schematic diagram of the tensioning base and tensioning top plate structure of the present invention;

[0030] Figure 8for Figure 7 A partially enlarged structural diagram of A in this invention.

[0031] In the diagram: 1. Tensioning base; 2. Stress relief mechanism; 3. Bracket; 4. Tensioning top plate; 5. Adjustment mechanism; 6. Upper I-beam; 7. Supporting bending frame; 8. Cantilever I-beam; 9. Pull arm; 10. Stud; 11. Nut; 201. Lower I-beam; 202. Fixed crossbeam; 203. Hydraulic pneumatic rod; 204. Transfer block; 205. Steel cable; 206. Support arm; 207. Fixed roller; 208. I-shaped wheel; 401. Slide groove; 501. Adjusting block; 502. Threaded hole; 503. Adjusting screw; 504. Rotating seat; 701. Reinforcing rod. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example: Please refer to Figure 1-8 The bridge hanging basket cast-in-place box girder support shown includes a tensioning base 1, a stress relief mechanism 2 fixedly provided at the bottom of the tensioning base 1, a tensioning top plate 4 provided at the top of the tensioning base 1, and multiple sliding grooves 401 extending downward through the front end and rear end of the top of the tensioning top plate 4, and an adjustment mechanism 5 slidingly provided inside the multiple sliding grooves 401.

[0034] The stress relief mechanism 2 includes two lower I-beams 201 distributed front to back. The two lower I-beams 201 are fixedly connected to the bottom of the tensioning base 1. A fixed crossbeam 202 is fixedly connected between the two lower I-beams 201, located at one end of each of the two lower I-beams 201. Two hydraulic pneumatic rods 203 distributed front to back are fixedly connected to the bottom of the fixed crossbeam 202. A transfer block 204 is fixedly connected to the output shaft ends of the two hydraulic pneumatic rods 203. A steel cable 205 is fixedly connected to the side of the transfer block 204 away from the hydraulic pneumatic rods 203. A bracket 3 is fixedly connected to the end of the steel cable 205 away from the transfer block 204. At the bottom of the lower I-beam 201, at the end furthest from the fixed crossbeam 202, a support arm 206 is fixedly connected. A fixed roller 207 is fixedly connected between the two support arms 206. The fixed roller 207 is located at the bottom of the bracket 3. An I-shaped wheel 208 is rotatably connected to the outer wall of the fixed roller 207. The I-shaped wheel 208 is engaged with the outer periphery of the steel cable 205. The output rods of the two hydraulic pneumatic rods 203 are retracted, which drives the transfer block 204 to move synchronously, thereby pulling multiple steel cables 205. On the left side of the multiple I-shaped wheels 208, the ends of the multiple steel cables 205 are pulled downward to the bracket 3, thereby eliminating the internal stress of the bracket 3 and ensuring the quality of the pouring.

[0035] The adjusting mechanism 5 includes an adjusting block 501, which slides inside the slide groove 401. A threaded hole 502 is formed through the front of the adjusting block 501, and an adjusting screw 503 is inserted through the threaded hole 502. The adjusting screw 503 is threadedly connected to the threaded hole 502. A rotating seat 504 is rotatably connected to the outside of the adjusting screw 503. The rotating seat 504 is fixedly connected to the top surface of the tensioning top plate 4. Multiple bolt holes are formed downwards at the front and rear ends of the top of the tensioning base 1 and the tensioning top plate 4, arranged in an equidistant linear array. A stud 10 is inserted into each of the two bolt holes distributed vertically. A nut 11 is threaded onto the outer wall of the stud 10, and the top of the nut 11 abuts against the bottom of the tensioning base 1. A bracket 3 is located on one side of the tensioning base 1 and the tensioning top plate 4, with a clearance fit between the bracket 3 and the tensioning base 1 and the tensioning top plate 4. The adjusting screw 503 is adjusted by adjusting the threaded hole 502. 3. Rotation causes the adjusting block 501, which is threadedly connected to the adjusting screw 503 through the threaded hole 502, to slide inside the slide groove 401. This allows multiple adjusting blocks 501 to abut against both sides of the bridge body. By adjusting each adjusting screw 503, the front and rear positions of the tensioning base 1 and the tensioning top plate 4 can be finely adjusted, thereby achieving fine adjustment of the front and rear position of the bracket 3. This prevents misalignment during bridge body pouring. After a section of the box girder bridge body is poured, multiple nuts 11 are loosened to release the tensioning force of the tensioning base 1 and the tensioning top plate 4 on the bridge body. At the same time, multiple adjusting screws 503 are loosened, allowing the adjusting block 501 to release the squeezing force on the tensioning top plate 4. At this time, under the action of external force, the tensioning top plate 4 can be pushed to move at the upper end of the bridge body, driving the bracket 3 and the adjusting mechanism 5 to move synchronously, thereby moving the bracket 3 to the next pouring area, thus improving the flexibility of the bracket 3.

[0036] In this embodiment, reference is made to Figure 1-6 As shown, there are multiple steel cables 205, which are distributed in an equidistant linear array. The number and position of the I-shaped wheels 208 correspond one-to-one with the number and position of the steel cables 205. By setting multiple steel cables 205, the bottom of the bracket 3 is pulled, which increases the force-bearing area of ​​the bracket 3 and avoids the additional stress caused by local pulling of the bracket 3, which may cause the bracket 3 to deform.

[0037] In this embodiment, reference is made to Figure 1-6 As shown, the fixed roller 207 is located at the end near the support arm 206 and away from the lower I-beam 201. By setting the fixed roller 207, it plays the role of rotational support for the I-shaped wheel 208, ensuring that the multiple I-shaped wheels 208 can rotate at different temperatures.

[0038] In this embodiment, reference is made to Figure 1-5As shown, the top of the tensioning top plate 4 is fixedly connected to two upper I-beams 6 distributed front to back. The two upper I-beams 6 are located between multiple adjustment mechanisms 5. The top of each of the two upper I-beams 6 is fixedly connected to a support bend 7. The top of the two support bend 7 is fixedly connected to two cantilever I-beams 8 distributed left to right. The bottom of each of the two cantilever I-beams 8 is fixedly connected to two tie arms 9 distributed front to back. The bottom of the four tie arms 9 is fixedly connected to the top of the bracket 3. By setting the two upper I-beams 6 to fix the two support bend 7, the two cantilever I-beams 8 are further lifted and placed, so that the bracket 3 is suspended on one side of the tensioning top plate 4 under the connection of the four tie arms 9, ensuring the stability of the bracket 3.

[0039] In this embodiment, reference is made to Figure 5 As shown, reinforcing rods 701 are fixedly connected to the side walls of both support bends 7. The top end of the reinforcing rod 701 is fixedly connected to one end of the top wall of the support bend 7. By setting the reinforcing rods 701, the support bend 7 is supported, which further improves the support and strength of the support bend 7.

[0040] In this embodiment, reference is made to Figure 1-5 As shown, the support bend 7 and the cantilever I-beam 8 are fixedly connected by U-bolts. By connecting the support bend 7 and the cantilever I-beam 8 with U-bolts, the cantilever I-beam 8 and the support bend 7 can be disassembled and separated when the bracket 3 is not needed, so as to facilitate the transportation and installation of the bracket 3 as a whole.

[0041] A method for using a bridge hanging basket cast-in-place box girder support includes the following steps:

[0042] S1. During installation, first place the tensioning top plate 4 on the upper end of the bridge body and place the tensioning base 1 on the bottom of the wall. Then, assemble and connect the tensioning base 1 and the tensioning top plate 4 with multiple studs 10, and screw multiple nuts 11 onto the multiple studs 10. Thus, under the action of the spiral force, the tensioning base 1 and the tensioning top plate 4 are initially tensioned and fixed at the upper and lower positions of the bridge body.

[0043] S2, after the tensioning base 1 and the tensioning top plate 4 are initially fixed, the two upper I-beams 6 and the supporting bend 7 are fixed on the top of the tensioning top plate 4, and the two cantilever I-beams 8 are fixed on the top of the two supporting bend 7. The bracket 3 is then suspended on one side of the tensioning top plate 4 by the four tie arms 9. The bracket 3 supports the formwork frame during the bridge box pouring operation. At the same time, by rotating each adjusting screw 503, the adjusting block 501, which is connected to the adjusting screw 503 through the threaded hole 502, slides inside the slide groove 401, so that multiple adjusting blocks 501 abut against both sides of the bridge body. By adjusting each adjusting screw 503, the front and rear positions of the tensioning base 1 and the tensioning top plate 4 can be finely adjusted, thereby achieving fine adjustment of the front and rear position of the bracket 3 and avoiding misalignment during bridge pouring.

[0044] S3, then, the two hydraulic pneumatic rods 203 are activated. The output rods of the two hydraulic pneumatic rods 203 retract, driving the transfer block 204 to move synchronously, thereby pulling multiple steel cables 205 and pulling the ends of multiple steel cables 205 downwards on the left side of multiple I-shaped wheels 208, thereby eliminating the internal stress of the bracket 3 and ensuring the quality of the pouring.

[0045] S4. After a section of the box girder bridge body is poured, the tensioning force of the tensioning base 1 and the tensioning top plate 4 on the bridge body is released by loosening multiple nuts 11. At the same time, multiple adjusting screws 503 are loosened, so that the adjusting block 501 releases the squeezing force on the tensioning top plate 4. At this time, under the action of external force, the tensioning top plate 4 can be pushed to move at the upper end of the bridge body, driving the bracket 3 and the adjusting mechanism 5 to move synchronously, thereby moving the bracket 3 to the next section of the pouring area, thus improving the flexibility of the bracket.

[0046] In this scheme, a bridge hanging basket cast-in-place box girder support is installed by first placing the tensioning top plate 4 on the upper end of the bridge body and the tensioning base 1 on the bottom of the wall. Then, multiple studs 10 are used to connect the tensioning base 1 and the tensioning top plate 4. Multiple nuts 11 are then screwed onto the studs 10, thus, under the action of helical force, the tensioning base 1 and the tensioning top plate 4 are initially tensioned and fixed at the upper and lower positions of the bridge body. After the tensioning base 1 and the tensioning top plate 4 are initially fixed, the two upper I-beams 6 and supports are then installed. The support frame 7 is fixed to the top of the tensioning top plate 4, and the two cantilever beams 8 are fixed to the top of the two support frames 7. The bracket 3 is then suspended on one side of the tensioning top plate 4 using four tie arms 9. The bracket 3 supports the formwork frame during the pouring of the bridge box girder. Simultaneously, by rotating each adjusting screw 503, the adjusting block 501, which is threadedly connected to the adjusting screw 503 through the threaded hole 502, slides inside the slide groove 401. This causes multiple adjusting blocks 501 to abut against both sides of the bridge body. Adjusting each adjusting screw 503 allows for fine-tuning of the front-to-back position of the tensioning base 1 and the tensioning top plate 4, thereby fine-tuning the front-to-back position of the bracket 3 and preventing misalignment during bridge construction. Subsequently, the two hydraulic pneumatic rods 203 are activated, and their output rods retract, causing the transfer block 204 to move synchronously. This pulls multiple steel cables 205 downwards on the left side of the multiple I-beams 208, causing the ends of the multiple steel cables 205 to pull the bracket 3 downwards, thus tightening the internal tension of the bracket 3. The stress is eliminated to ensure the quality of the pouring. After a section of the box girder bridge body is poured, the tensioning base 1 and the tensioning top plate 4 are released from the tensioning force on the bridge body by loosening multiple nuts 11. At the same time, multiple adjusting screws 503 are loosened, so that the adjusting block 501 releases the squeezing force on the tensioning top plate 4. At this time, under the action of external force, the tensioning top plate 4 can be pushed to move at the upper end of the bridge body, driving the bracket 3 and the adjusting mechanism 5 to move synchronously, thereby moving the bracket 3 to the next pouring area, thus improving the flexibility of the bracket 3.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bridge hanging basket cast-in-place box girder bracket, comprising a tensioning base (1), characterized in that: The bottom of the tensioning base (1) is fixedly provided with a stress relief mechanism (2), the top of the tensioning base (1) is provided with a tensioning top plate (4), the top front end and the top rear end of the tensioning top plate (4) are both provided with a plurality of sliding grooves (401) penetrating downward, and the interiors of the plurality of sliding grooves (401) are both slidably provided with an adjusting mechanism (5); The stress relief mechanism (2) comprises two front and rear distributed lower I-shaped beams (201), the two lower I-shaped beams (201) are fixedly connected to the bottom of the tensioning base (1), a fixed cross beam (202) is fixedly connected between the two lower I-shaped beams (201), the fixed cross beam (202) is located at one end of the two lower I-shaped beams (201), the bottom of the fixed cross beam (202) is fixedly connected with two front and rear distributed hydraulic gas rods (203), the output shaft ends of the two hydraulic gas rods (203) are fixedly connected with a transfer block (204), one side of the transfer block (204) away from the hydraulic gas rod (203) is fixedly connected with a steel cable (205), one end of the steel cable (205) away from the transfer block (204) is fixedly connected with a bracket (3), the bottom of each of the two lower I-shaped beams (201) away from the fixed cross beam (202) is fixedly connected with a support arm (206), a fixed roller (207) is fixedly connected between the two support arms (206), the fixed roller (207) is located at the bottom of the bracket (3), and a I-shaped wheel (208) is rotatably connected to the outer wall of the fixed roller (207), and the I-shaped wheel (208) is clamped to the periphery of the steel cable (205); The adjusting mechanism (5) comprises an adjusting block (501), the adjusting block (501) is slidably arranged in the sliding groove (401), a threaded hole (502) is penetratingly formed in the front of the adjusting block (501), an adjusting screw rod (503) is penetratingly inserted into the threaded hole (502), the adjusting screw rod (503) is connected with the threaded hole (502) through thread cooperation, and a rotating seat (504) is rotatably connected to the outer portion of the adjusting screw rod (503), and the rotating seat (504) is fixedly connected to the top surface of the tensioning top plate (4); The top of the tensioning top plate (4) is fixedly connected with two front and rear distributed upper I-shaped beams (6), the two upper I-shaped beams (6) are located between the plurality of adjusting mechanisms (5), the top of each of the two upper I-shaped beams (6) is fixedly connected with a support bent frame (7), the top of each of the two support bent frames (7) is fixedly connected with two left and right distributed cantilever I-shaped beams (8), the bottom of each of the two cantilever I-shaped beams (8) is fixedly connected with two front and rear distributed pull arms (9), and the bottom of each of the four pull arms (9) is fixedly connected with the top of the bracket (3). The top front end and the top rear end of the tensioning base (1) and the tensioning top plate (4) are penetrated downward and a plurality of bolt holes are formed, the plurality of bolt holes are linearly arranged at equal intervals, two bolt holes arranged upward and downward are equipped with studs (10) respectively, the outer wall of the stud (10) is threadedly connected with a nut (11), and the top of the nut (11) abuts against the bottom of the tensioning base (1).

2. The bridge hanging basket cast-in-place box girder support bracket according to claim 1, characterized in that: The number of the steel ropes (205) is multiple, the multiple steel ropes (205) are linearly arranged at equal intervals, and the number of the I-shaped wheels (208) corresponds to the number and position of the steel ropes (205).

3. The bridge hanging basket cast-in-place box girder support bracket according to claim 1, characterized in that: The fixed roller (207) is located at one end of the support arm (206) away from the lower I-shaped beam (201).

4. The bridge hanging basket cast-in-place box girder support of claim 1, wherein: The side wall of each of the two support brackets (7) is fixedly connected with a reinforcing rod (701), and the top end of the reinforcing rod (701) is fixedly connected with one end of the top wall of the support bracket (7).

5. The bridge hanging basket cast-in-situ box girder support bracket according to claim 4, characterized in that: The support bracket (7) and the bracket I-shaped beam (8) are fixedly connected through a horse bolt.

6. The bridge hanging basket cast-in-place box girder support of claim 1, wherein: The bracket (3) is located on one side of the tensioning base (1) and the tensioning top plate (4), and the bracket (3) is gap-fitted with the tensioning base (1) and the tensioning top plate (4).

7. The method of using a bridge trolley cast-in-place box girder cradle of claim 1, wherein: The following steps are included: S1, during installation, first place the tensioning top plate (4) at the upper end of the bridge body, place the tensioning base (1) at the bottom of the bridge body, then assemble and connect the tensioning base (1) and the tensioning top plate (4) through the plurality of studs (10), and then threadedly connect the plurality of nuts (11) with the plurality of studs (10), so that the tensioning base (1) and the tensioning top plate (4) are preliminarily tensioned and fixed at the upper and lower positions of the bridge body under the action of the screw force; S2, after the tensioning base (1) and the tensioning top plate (4) are preliminarily fixed, the two upper I-shaped beams (6) and the support bracket (7) are fixed at the top of the tensioning top plate (4), the two bracket I-shaped beams (8) are fixed at the top of the two support brackets (7), the bracket (3) is suspended on one side of the tensioning top plate (4) through the four pull arms (9), the bracket (3) supports the formwork during the pouring operation of the bridge box, and the front and rear positions of the tensioning base (1) and the tensioning top plate (4) can be adjusted through the rotation of each adjusting screw rod (503), the sliding of the adjusting block (501) in the sliding groove (401) under the threaded connection of the adjusting screw rod (503) and the threaded hole (502), the abutment of the plurality of adjusting blocks (501) on the two sides of the bridge body, and the adjustment of each adjusting screw rod (503), so that the front and rear positions of the bracket (3) are adjusted, and the misalignment of the bridge body during pouring is avoided. S3, subsequently, start two hydraulic gas rod (203), two said hydraulic gas rod (203) output rod retraction, drive the transfer block (204) synchronous movement, thereby pulling a plurality of steel cable (205), and under the action of a plurality of I-beam (208), the end of a plurality of steel cable (205) to pull down the bracket (3), thereby eliminating the stress of the inside of the bracket (3), to ensure the quality of pouring; S4, when the cast-in-place box girder bridge body pouring is completed after a period, by loosening a plurality of nut (11), remove the tensioning base (1) and the tensioning top plate (4) to the bridge body tensioning force, and at the same time, the plurality of adjusting screw (503) is loosened, so that the adjusting block (501) remove the extrusion force of the tensioning top plate (4), at this time, under the action of external force, push the tensioning top plate (4) in the upper end of the bridge body, drive the bracket (3) and adjusting mechanism (5) synchronous movement, thereby moving the bracket (3) to the next pouring area, thereby improving the flexibility of the bracket use.

Images