CN-121992732-A - Construction method of bridge girder erection machine at height-limited position

CN121992732ACN 121992732 ACN121992732 ACN 121992732ACN-121992732-A

Abstract

The invention belongs to the technical field of bridge girder erection machines, and particularly relates to a construction method of a bridge girder erection machine at a position with limited height. The method comprises the steps of S1, arranging at least 2 hydraulic brackets on a girder transporting vehicle for supporting a bridge girder erection machine, S2, transporting the girder transporting vehicle to a position with limited height, lowering the bridge girder erection machine to a position with limited height, S3, enabling a front supporting leg structure to be firmly supported on a pier through the position with limited height, S4, enabling the bridge girder erection machine to move forwards on the girder transporting vehicle at the stage, supporting the front supporting leg structure and the auxiliary supporting leg structure on the pier corresponding to the front at the same time, S5, carrying out synchronous jacking operation on the bridge girder erection machine by means of the auxiliary supporting leg structure and the rear hydraulic brackets so as to enable a girder of the bridge girder erection machine to be restored to a normal high position, S6, operating the rear supporting leg structure, and folding an upper curved girder, an upper door girder and a lower curved girder back to the original position. The invention successfully solves the problem of transportation profile limitation faced by the traditional equipment when the traditional equipment is transited in narrow spaces such as tunnels and the like.

Inventors

GUO WENJUN
BAI YONG
Du Tiefeng
QI GUOHUAN

Assignees

中铁十二局集团有限公司
中铁十二局集团第一工程有限公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (10)

1. The construction method of the bridge girder erection machine at the height limited place is characterized by comprising the following steps: S1, arranging at least 2 hydraulic brackets on a girder transporting vehicle for supporting a bridge girder erection machine, wherein a rear supporting leg structure (2) of the bridge girder erection machine is arranged on the girder transporting vehicle and can move along the girder transporting vehicle, and a front supporting leg structure (3) and an auxiliary supporting leg structure (4) of the bridge girder erection machine are positioned at the direction of a transport Liang Cheqian; S2, the girder transporting vehicle lifts the high position of the bridge girder erection machine to the position with limited height, and the bridge girder erection machine is lowered to the low position and then passes through the position with limited height; s3, enabling the front supporting leg structure (3) to be stably supported on the bridge pier through the position with limited height; s4, the tail part of the bridge girder erection machine is still at a position with limited height, the bridge girder erection machine forwards moves on a girder transporting vehicle, and the front supporting leg structure (3) and the auxiliary supporting leg structure (4) are simultaneously erected on the pier corresponding to the front part; s5, synchronous jacking operation is carried out on the bridge girder erection machine by means of the auxiliary supporting leg structure (4) and the rear hydraulic bracket, so that the main girder of the bridge girder erection machine is restored to a normal high position; S6, operating the rear supporting leg structure (2) and folding the upper curved beam (8), the upper door beam (5) and the lower curved beam (9) back to the original positions.
2. The method for constructing a bridge girder erection machine at a height limited place according to claim 1, wherein in the step S2, the operation of lowering the bridge girder erection machine to a low position specifically comprises: Erecting a plurality of hydraulic brackets at the bottom of a girder (1) of the bridge girder erection machine, and enabling the girder (1) of the bridge girder erection machine to stably descend from a high position to a low position by utilizing synchronous shrinkage of the hydraulic brackets; -performing a folding operation on the front leg structure (3) and the auxiliary leg structure (4): the front supporting leg structure (3) is turned over and folded towards the main beam (1) by utilizing the traction of an electric hoist; the auxiliary supporting leg structure (4) drives the auxiliary supporting leg steel frame (20) to turn up around the hinge point by driving the turning oil cylinder assembly (21) to shrink; performing a folding operation on the rear leg structure: an upper door Liang Shezhuai cylinder (6) is operated to drive an upper door beam (5) to fold; the upper curved beam (8) and the lower curved beam (9) are operated by an electric hoist to fold relative to the main beam (1); only the hydraulic bracket is used for supporting the bridge girder erection machine, and the hydraulic bracket is lowered to lower the whole bridge girder erection machine.
3. The method of construction of a bridge girder erection machine at a height restricted place according to claim 1, wherein the step S4 comprises: the front supporting leg structure (3) and the auxiliary supporting leg structure (4) are operated to be folded back to a vertical state, wherein the front supporting leg structure (3) is supported on a corresponding pier, and the auxiliary supporting leg structure (4) is in a suspended state; The lower curved beam (9) in the support leg structure (2) is folded back to the original position after operation, and the bridge girder erection machine is supported by the lower curved beam (9), the lower curved beam base (10) and the lower curved beam base transportation trolley (11); The connection relation between the hydraulic bracket and the bridge girder erection machine is relieved, a lower curved beam base transport trolley (11) of the rear supporting leg structure (2) drives the main girder (1) and the auxiliary supporting leg structure (4) to move forwards, and the front supporting leg structure (3) slides relative to the main girder (1) so as to keep the position of the front supporting leg structure unchanged; After the auxiliary supporting leg structure (4) moves forward to the corresponding pier position, the auxiliary supporting leg structure (4) is operated to be supported on the pier.
4. The method of constructing a bridge girder erection machine at a height restricted place according to claim 1, further comprising, after step S6: The rear supporting leg structure (2) is lifted, the hydraulic bracket is separated from the main beam (1), the beam transporting vehicle returns to the beam field for beam assembly, and the bridge girder erection machine completes the operation.
5. The method of constructing a bridge girder erection machine at a height restricted place according to claim 1, wherein the bridge girder erection machine comprises: the main beam (1) is horizontally arranged; The rear supporting leg structure (2) is arranged on the main beam (1) structure and used for supporting the main beam (1) to walk; The front support leg structure (3) is slidably arranged at the front end of the main beam (1), and the front support leg structure (3) can be folded around the connecting position and is used for supporting the main beam (1); The auxiliary supporting leg structure (4), the auxiliary supporting leg structure (4) is installed at the forefront end of the girder (1) in a hinged mode, and the auxiliary supporting leg structure (4) can be used for carrying out angle adjustment or folding around a hinged point and is used for supporting the girder (1).
6. The method of constructing a bridge girder erection machine at a height restricted place according to claim 5, wherein the rear leg structure comprises: the upper curved beam (8) is connected with the main beam (1) through an upper curved beam folding hinged support (26) and can be folded relative to the main beam (1); the upper door beam (5) is hinged on the upper curved beam (8) and can be driven to rotate and fold by an upper door Liang Shezhuai oil cylinder (6), one end of the upper door Liang Shezhuai oil cylinder (6) is connected with the upper curved beam (8), and the other end is connected with an upper door beam folding hinged support (7) fixed on the main beam (1); the lower curved beam (9) is connected with the bottom of the upper curved beam (8) through a lower curved beam folding hinged support (27) and can be folded relative to the upper curved beam (8); The lower curved beam base (10) is arranged at the bottom of the lower curved beam (9); the lower curved beam base transportation trolley (11), the lower curved beam base transportation trolley (11) is arranged at the bottom of the lower curved beam base (10).
7. The method of construction of a bridge girder erection machine at a height restricted place according to claim 5, wherein the front leg structure (3) comprises: the main beam rear supporting seats (12), wherein the main beam rear supporting seats (12) are provided with 2 groups and can move along a guide rail arranged at the bottom of the main beam (1); The upper slideway support cross beam (13), the upper slideway support cross beam (13) is connected between the rear support seats (12) of the 2 groups of main beams; The diagonal bracing support beam (15), the diagonal bracing support beam (15) is installed at the bottom of the upper slideway support beam (13); the lifting column body is hinged to one side of the bottom of the diagonal bracing support beam (15); The middle cross beam (32), the middle cross beam (32) is arranged in the middle of the lifting column, and a pulley assembly (34) is arranged on the middle cross beam (32); The lower cross beam (33), the lower cross beam (33) is installed at the lifting column lower extreme, and lower cross beam (33) are articulated with bracing supporting beam (15) bottom through the diagonal brace.
8. The method of construction of a bridge girder erection machine at a height restricted place according to claim 5, wherein the auxiliary leg structure (4) comprises: The auxiliary support leg steel frame (20) is hinged to the bottom of the forefront end of the main beam (1) through a hinged seat (35) at the upper end of the overturning oil cylinder; The overturning oil cylinder assembly (21), the overturning oil cylinder assembly (21) is arranged between the auxiliary support leg steel frame (20) and the main beam (1); The bottom grounding support beam (23) is connected to the lower end of the auxiliary support leg steel frame (20) through the telescopic oil cylinder device (22); The bottom oblique grounding support beam (25) is hinged with the bottom grounding support beam (23) through the lower cross beam oblique reinforcement support (24), and can turn around a hinge point by means of driving of an electric hoist so as to adjust the grounding angle of the bottom oblique grounding support beam.
9. The construction method of the bridge girder erection machine at the height-limited position according to claim 6, wherein a chain block traction system is configured for the folding operation of the upper curved girder (8), one end of the chain block is fixed on the main girder (1), the other end of the chain block is fixed on the upper curved girder (8), an electric block traction system is configured for the folding operation of the lower curved girder (9), one end of the electric block is fixed on the main girder (1), the other end of the electric block is fixed on the lower curved girder (9), and the sequential controllable folding of the rear leg structure is realized by respectively operating the chain block and the electric block.
10. The construction method of the bridge girder erection machine at the height-limited place according to claim 7, wherein a safety locking mechanism is further configured for lifting and folding operations of the front supporting leg structure (3), the safety locking mechanism comprises a hinge pin II for fixing the telescopic column assembly (28) and the supporting leg assembly (29) and a hinge pin I for fixing the supporting leg assembly (29) and the pier-holding support (30), and each hinge pin is embedded into or pulled out of a corresponding hole site in a manual hammering mode so as to achieve mechanical interlocking of the telescopic column assembly and the supporting leg assembly and prevent accidental shrinkage caused by decompression of an oil cylinder in a supporting state.

Description

Construction method of bridge girder erection machine at height-limited position Technical Field The invention belongs to the technical field of bridge girder erection machines, and particularly relates to a construction method of a bridge girder erection machine at a position with limited height. Background In the field of bridge construction, a transition passing method of the bridge girder erection machine is as important as a girder erection operation method, and the continuity and the overall efficiency of a construction line are directly determined. When the traditional bridge girder erection machine passes through tunnels, under bridges or other obstacle areas with limited height and width, the adopted construction organization method has obvious problems, and becomes a key bottleneck for restricting the rapid promotion of large engineering projects. Currently, the transition passing method commonly adopted in the industry can be summarized as an on-site disintegration and sectional transportation method. This method involves a fixed, labor-intensive set of flow sequences: after the bridge girder erection machine is in place before the entrance of the obstacle, constructors need to systematically disassemble the girder connecting bolts, the supporting leg anchoring pieces, the hydraulic pipelines and the electric circuits on site. The process is often assisted by large hoisting equipment, and the whole machine is decomposed into a plurality of units with the sizes and the weights meeting the transportation requirements. The disassembled parts pass through transportation means such as a flat car and sequentially pass through a narrow area in batches. The logistics organization process not only occupies a large amount of transportation resources, but also needs to clean and control transportation paths, and coordination work is complex. After all the components are transported to the other end of the obstacle, the components need to be assembled, butted, leveled and system debugged again on a new bridge pier or bridge deck. The stage relates to high-altitude operation, precise centering and load test, and is a link with high concentration of safety and quality risks. Therefore, from the viewpoint of construction methodology, there is an urgent need in the art to develop a completely new "low-level folding overall pass-through method". The ideal new method aims to realize the following aims that the bridge girder erection machine can be used as a complete and intelligent system, can pass through a limited space in a safe low-attitude integrally on the premise of not stopping and disassembling by controllable deformation and cooperative action of the structure of the bridge girder erection machine, and can quickly restore to a working state after being in place. Disclosure of Invention The invention aims to solve the problems and provides a construction method of a bridge girder erection machine at a position with limited height. The invention adopts the following technical scheme that the construction method of the bridge girder erection machine at the position with limited height comprises the following steps: S1, arranging at least 2 hydraulic brackets on a girder transporting vehicle for supporting a bridge girder erection machine, wherein a rear supporting leg structure of the bridge girder erection machine is arranged on the girder transporting vehicle and can move along the girder transporting vehicle, and a front supporting leg structure and an auxiliary supporting leg structure of the bridge girder erection machine are positioned at the direction of carrying Liang Cheqian; S2, the girder transporting vehicle lifts the high position of the bridge girder erection machine to the position with limited height, and the bridge girder erection machine is lowered to the low position and then passes through the position with limited height; s3, enabling the front supporting leg structure to be stably supported on the bridge pier through the position with limited height; s4, the tail part of the bridge girder erection machine is still at a position with limited height, the bridge girder erection machine forwards moves on a girder transporting vehicle, and the front supporting leg structure and the auxiliary supporting leg structure are simultaneously erected on the pier corresponding to the front part; S5, synchronous jacking operation is carried out on the bridge girder erection machine by means of the auxiliary supporting leg structure and the rear hydraulic bracket, so that the girder of the bridge girder erection machine is restored to a normal high position; and S6, operating the rear supporting leg structure, and folding the upper curved beam, the upper door beam and the lower curved beam back to the original positions. In some embodiments, in step S2, the operation of lowering the bridge girder erection machine to the low position specifically includes: Erecting a plurality of hydraulic brackets at