CN-117230730-B - Construction method for dismantling large-span prestress cast-in-situ box girder bracket

CN117230730BCN 117230730 BCN117230730 BCN 117230730BCN-117230730-B

Abstract

The invention discloses a construction method for dismantling a large-span prestress cast-in-situ box girder bracket, which particularly relates to the field of cast-in-situ box girders, comprising four adjusting components, wherein the bottoms of the four adjusting components are fixedly connected with a traction component together, the upper surface of the traction assembly is provided with a supporting assembly, the outer side wall of the adjusting assembly is provided with a monitoring assembly, and the four adjusting assemblies are symmetrically positioned in front of and behind the traction assembly. According to the invention, the four brackets are fixed on the surface of the cast-in-situ box girder main body, the adjusting disc is rotated, the position of the supporting component is adjusted, the supporting frame is in butt joint with the positioning column, then the traction rope sequentially passes through the supporting disc, the supporting ring, the limiting pulley, the limiting hole and the circular ring, and is slowly released through the winch, at the moment, the support main body slowly moves downwards under the action of gravity, and the traction rope is integrated on one winch through the supporting component, so that the four traction ropes can be synchronously retracted and released, and the level of the support main body when being detached is ensured.

Inventors

ZHANG HAIHONG
WU BIAO
Lu Rang
WANG JIAN
YANG LEI
MENG YADONG
PENG JIAJUN
CHEN YANZHENG
WANG ZUNZHENG

Assignees

中国水利水电第三工程局有限公司

Dates

Publication Date: 20260512
Application Date: 20231102

Claims (5)

1. The construction method for dismantling the large-span prestress cast-in-situ box girder bracket comprises four adjusting components (101), and is characterized in that the bottoms of the four adjusting components (101) are fixedly connected with a traction component (601) together, the upper surface of the traction component (601) is provided with a supporting component (401), the outer side wall of the adjusting component (101) is provided with a monitoring component (301), the four adjusting components (101) are symmetrically arranged in front of and behind the traction component (601), the supporting component (401) is arranged right above the traction component (601), the adjusting component (101) comprises a bracket (11), a positioning column (12), a limiting hole (14), four connecting frames (15), a sliding seat (16), a screw rod (17), a driving motor (18), two limiting rods (19), an adjusting seat (20) and a pull ring (21), the sliding seat (16) is connected to the inner side wall of the adjusting seat (20) in a sliding mode, the sliding seat (16) is connected to the outer side wall of the two limiting rods (19) in a sliding mode, the sliding seat (16) is connected to the outer side wall of the screw rod (17) in a threaded mode, one end of the screw rod (17) is fixedly connected to the output shaft (21) of the screw rod (17), the positioning column (12) is fixedly connected to the upper surface of the bracket (11), the limiting hole (14) is formed in the upper surface of the bracket (11), and the supporting assembly (401) comprises a supporting disc (41), four sliding grooves (42), four supporting frames (44), a supporting ring (46), four limiting pulleys (47), a sliding block (48), a threaded rod (49), a rotating seat (50) and two guide rods (51); The four sliding grooves (42) are symmetrically formed in the upper surface of the supporting disc (41), the four limiting pulleys (47) are symmetrically arranged in the supporting ring (46), the rotating seat (50) is fixedly connected to the upper surface of the supporting frame (44), the sliding blocks (48) are slidably connected to the outer side walls of the two guide rods (51), and the sliding blocks (48) are slidably connected to the outer side walls of the threaded rods (49); the traction assembly (601) comprises a winch (61), a bracket main body (62), a traction rope (63), a cast-in-situ box girder main body (64), four traction sleeves (65) and a circular ring (66); The winch (61) is arranged in the center of the upper surface of the cast-in-situ box girder main body (64), four traction sleeves (65) are symmetrically sleeved on the outer side wall of the bracket main body (62), the circular ring (66) is buckled with the traction sleeves (65), one end of the traction rope (63) is fixedly connected with the outer side wall of a winding shaft of the winch (61), and the other end of the traction rope (63) is fixedly connected with the pull ring (21); the traction ropes (63) sequentially penetrate through the circular rings (66), the limiting holes (14), the limiting pulleys (47), the supporting rings (46) and the supporting plates (41), the four brackets (11) are symmetrically and fixedly connected to the upper surface of the cast-in-situ box girder main body (64), and the windlass (61) is located under the supporting plates (41); The two ends of the guide rod (51) are symmetrically and fixedly connected to two sides of the inner wall of the chute (42), one end of the threaded rod (49) is rotatably connected to one side of the inner wall of the chute (42), the threaded rod (49) is rotatably connected to the inside of the supporting disc (41), and the other end of the threaded rod (49) is fixedly connected with the adjusting disc (43); Four brackets are fixed on the surface of the cast-in-situ box girder main body, the adjusting disk is rotated to adjust the position of the supporting component, the supporting frame is in butt joint with the positioning column, then the traction ropes sequentially penetrate through the supporting disk, the supporting ring, the limiting pulley, the limiting hole and the circular ring, the traction ropes are slowly released through the winch, at the moment, the support main body slowly moves downwards under the action of gravity, the traction ropes are integrated on one winch through the supporting component, and the purposes of synchronously winding and unwinding the four traction ropes are achieved, so that the level of the support main body during disassembly is guaranteed.
2. The method for dismantling the large-span prestressed cast-in-situ box girder support according to claim 1, wherein the driving motor (18) is installed on the front surface of the adjusting seat (20), the front ends of the limiting rods (19) are fixedly connected to the inner front wall of the adjusting seat (20), the rear ends of the limiting rods (19) are fixedly connected to the front surface of the bracket (11), the rear ends of the screw rods (17) are rotatably connected to the inner rear wall of the adjusting seat (20), the front ends of the four connecting frames (15) are symmetrically and fixedly connected to the outer side wall of the sliding seat (16), the rear ends of the four connecting frames (15) are symmetrically and fixedly connected to the outer side wall of the bracket (11), and the adjusting seat (20) is slidably connected to the outer side walls of the two limiting rods (19).
3. The method for dismantling the large-span prestressed cast-in-situ box girder bracket according to claim 1, wherein the monitoring assembly (301) comprises a mounting frame (31), a ranging sensor (32), a controller (33) and an audible and visual alarm (34); The mounting frame (31) is fixedly connected to the lower surface of the bracket (11), the ranging sensor (32) is mounted on the lower surface of the mounting frame (31), the controller (33) is mounted on one side of one bracket (11), and the audible-visual annunciator (34) is mounted on the upper surface of the bracket (11).
4. The method for dismantling the large-span prestressed cast-in-situ box girder support according to claim 1, wherein the upper surface of the rotating seat (50) is rotatably connected to the lower surface of the sliding block (48), the supporting ring (46) is rotatably connected to the upper surface of the supporting plate (41), the supporting ring (46) and the supporting plate (41) are coaxially arranged, and a positioning hole (45) is formed in the supporting frame (44).
5. The method for dismantling the large-span prestressed cast-in-situ box girder support as claimed in claim 4, wherein four supporting frames (44) are symmetrically arranged above the cast-in-situ box girder main body (64), the positioning columns (12) are slidably connected to the inner side walls of the positioning holes (45), and the supporting frames (44) are fixedly connected with the positioning columns (12) through nuts.

Description

Construction method for dismantling large-span prestress cast-in-situ box girder bracket Technical Field The invention relates to the technical field of cast-in-situ box girders, in particular to a construction method for dismantling a large-span prestressed cast-in-situ box girder bracket. Background The Chinese patent discloses cast-in-situ box girder support dismantling equipment, which has the technical proposal that the positioning mechanism is designed to increase the positioning of the convex ring during the movement, so that the movable block is positioned during the movement, the sliding block at the bottom of the rolling frame is inserted along the sliding groove arranged at the top of the base during the installation of the rolling frame, the positioning during the installation of the rolling frame is increased, the threaded rod is rotated after the rolling frame is inserted, and the threaded rod is screwed into the slot arranged at the top of the rolling frame, so that the stable installation of the rolling frame is realized. However, the problem that whether the bracket is dismantled or the bracket is dismantled on the market at present exists is that when the bracket is dismantled, a plurality of rolling devices or hoisting devices are required to be used for hoisting and dismantling the bracket, so that the bracket can incline during hoisting, and certain potential safety hazards exist. Therefore, we propose a construction method for dismantling a large-span prestress cast-in-situ box girder bracket to solve the problems. Disclosure of Invention In order to overcome the defects in the prior art, the embodiment of the invention provides a construction method for dismantling a large-span prestress cast-in-situ box girder bracket, wherein a traction rope is slowly released by a winch, a bracket main body slowly moves downwards under the action of gravity, and the traction ropes are integrated on one winch by a supporting component, so that four traction ropes can be synchronously retracted and released, and the problems in the prior art are solved. The invention provides a construction method for dismantling a large-span prestress cast-in-situ box girder bracket, which comprises four adjusting components, wherein the bottoms of the four adjusting components are fixedly connected with a traction component together, the upper surface of the traction component is provided with a supporting component, the outer side wall of the adjusting component is provided with a monitoring component, the four adjusting components are symmetrically positioned in front of and behind the traction component, the supporting component is positioned right above the traction component, the adjusting component comprises a bracket, a positioning column, a limiting hole, four connecting frames, a sliding seat, a screw rod, a driving motor, two limiting rods, an adjusting seat and a pull ring, the sliding seat is connected to the inner side wall of the adjusting seat in a sliding manner, the sliding seat is connected to the outer side walls of the two limiting rods in a sliding manner, one end of the screw rod is fixedly connected to an output shaft of the driving motor, the pull ring is fixedly connected to the lower surface of the adjusting seat, the positioning column is fixedly connected to the upper surface of the bracket, the limiting hole is formed in the upper surface of the bracket, and the supporting component comprises a supporting seat, four supporting brackets, four supporting rods, four supporting brackets, four supporting rings, four supporting rods, two sliding blocks, two limiting pulleys, two sliding blocks and a rotating disc; The four sliding grooves are symmetrically formed in the upper surface of the supporting disc, the four limiting pulleys are symmetrically arranged in the supporting ring, the rotating seat is fixedly connected to the upper surface of the supporting frame, the sliding blocks are slidably connected to the outer side walls of the two guide rods, and the sliding blocks are slidably connected to the outer side walls of the threaded rods. The traction assembly comprises a winch, a bracket main body, a traction rope, a cast-in-situ box girder main body, four traction sleeves and a circular ring; The winch is arranged at the center of the upper surface of the cast-in-situ box girder main body, the four traction sleeves are symmetrically sleeved on the outer side wall of the bracket main body, the circular ring is buckled with the traction sleeves, one end of the traction rope is fixedly connected with the outer side wall of the winch reel, and the other end of the traction rope is fixedly connected with the pull ring; The traction rope sequentially passes through the circular ring, the limiting hole, the limiting pulley, the supporting ring and the supporting disc, the four brackets are symmetrically and fixedly connected to the upper surface of the cast-in-situ box girder main body, and t