Auxiliary reinforcing device for incremental launching construction of fabricated steel truss girder bridge

Abstract

The invention discloses an auxiliary reinforcing device for incremental launching construction of a fabricated steel truss girder bridge. The auxiliary reinforcing device comprises a bridge system, a control center, a sliding mast, a control lifting point, a steel cable and a reinforcing assembly. The guide beam, the first section of main beam and the second section of main beam are assembled and connected for pushing operation, a control lifting point is arranged at the position of the guide beam and clamped and fixed through a bolt plate and a matched bolt, a first sliding mast and a second sliding mast are arranged on the first section of main beam and the second section of main beam respectively, and a control center is arranged at the tail ends of the main beams. Steel cables penetrate through sliding wheels respectively arranged at the tops of the control lifting point and the first and second sliding masts; the right sides of the steel cables are connected to a driving wheel of a control center. And the motor drives the chain to control the driving wheel to rotate, so that the steel rope is retracted and released, and the lifting and falling functions of the lifting point are controlled. And the situation that the normal service state of the steel truss girder bridge is affected due to damage to the steel truss girder bridge nodes caused by alternating positive and negative bending moments in the incremental launching construction process is avoided. The control lifting points, the sliding masts and the control center can be installed in an assembly mode, multiple sets of sliding masts are selected according to different steel truss girder bridge scales, balanced stress is achieved, and it is guaranteed that stress is reasonable in the steel truss girder bridge pushing process. The structure is reasonable, the assembling degree is high, construction is convenient, the adaptability is high, and application and popularization can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel truss bridge incremental launching construction technology, in particular to an auxiliary reinforcing device for the incremental launching construction of an assembled steel truss bridge. BACKGROUND

[0002] Steel truss bridge incremental launching construction is a common construction method at present, and is often used as an optimal solution especially in special environments such as existing viaducts, rivers or through valleys, and protected areas. In order to avoid damage to the bridge caused by excessive bending moment in the cantilever stage, a guide beam is used to reduce the cantilever span. However, the steel truss bridge often needs to go through stages such as cantilever state, simply supported state, simply supported cantilever state, maximum cantilever state and completed bridge state during the incremental launching process. From the perspective of mechanical model, the steel truss bridge is a space structure composed of a series of members connected by hinges at both ends, with triangular elements. The members are mainly subjected to tension or compression, and can fully develop the material properties, but the nodes have very high requirements. It can be found that the steel truss bridge is subjected to inconsistent forces at different stages during the incremental launching process, and is in an alternating dynamic process of positive and negative bending moments, which is easy to cause damage to the nodes and inevitably affects the mechanical state of the completed steel truss bridge.

[0003] In view of this, the incremental launching construction process of the steel truss bridge should avoid or reduce the repeated tension and compression stress state of the bridge for a long time, and ensure the healthy stress state of the steel truss bridge. SUMMARY

[0004] The purpose of the present application is to provide an auxiliary reinforcing device for the incremental launching construction of an assembled steel truss bridge, so as to solve the problem that the nodes of the steel truss bridge are damaged by alternating positive and negative bending moments during the incremental launching construction process, and affect the normal service state of the steel truss bridge.

[0005] The present application provides an auxiliary reinforcing device for the incremental launching construction of an assembled steel truss bridge, which comprises a bridge system, a control center, a sliding mast, a control lifting point, a steel cable and a reinforcing assembly. The bridge system comprises a guide beam, a first main beam, a second main beam, a first pier, a second pier and four temporary piers. The control center comprises high-strength dowels, clamping steel plates, chains, driving wheels and motors. The sliding mast comprises a top sliding wheel, a stiffener plate and a bolt plate.

[0006] Further, the guide beam, the first main beam and the second main beam are constructed by assembly, and a three-dimensional walking incremental launching device is arranged on the piers and the temporary piers for incremental launching operation.

[0007] Further, the sliding mast is provided with a sliding wheel at the top for bidirectional sliding of the steel cable, and the bottom of the sliding mast is clamped and fixed to the steel truss bridge by the bolt plate and the corresponding bolts, and is assisted and reinforced by the stiffener plate.

[0008] Further, the control lifting point is arranged at the position of the guide beam and is clamped and fixed by the bolt plate and the matching bolts.

[0009] Furthermore, the control center is fixed to the main beam by high-strength bolts and clamping steel plates. The working principle is to control the rotation of the driving wheel by driving the chain through an electric motor. The driving wheel is connected to a steel cable to realize the retraction and extension function of the steel cable, thereby realizing the lifting and lowering function of the control lifting point.

[0010] Preferably, the number of control suspension points is greater than one, and the number of sliding masts is greater than one, which is selected based on the actual scale of the steel truss bridge.

[0011] During the jacking process of some steel truss bridges, the guide beam is connected to the first section of the main beam for jacking operations. The control lifting point is arranged at the guide beam position and is clamped and fixed by bolt plates and matching bolts. The first sliding mast is arranged in the middle and rear area of ​​the first section of the main beam, and the control center is arranged at the end of the main beam. The control lifting point and the first sliding wheel at the top of the first sliding mast are passed through steel cables, and the right side of the steel cable is connected to the driving wheel of the control center.

[0012] During the jacking process of other steel truss bridges, the guide beam, the first section main beam and the second section main beam are assembled and connected for jacking operations. The control lifting point is arranged at the guide beam position and is clamped and fixed by bolt plates and matching bolts. The first sliding mast is arranged in the middle and rear area of ​​the first section main beam, and the second sliding mast is arranged in the middle and rear area of ​​the second section main beam. The control center is arranged at the end of the main beam. The sliding wheels arranged at the control lifting point and the top of the first sliding mast and the second sliding mast are respectively passed through steel cables, and the right side of the steel cable is connected to the driving wheel of the control center.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention provides an auxiliary reinforcement device for jacking construction of prefabricated steel truss bridges. This device controls the forces acting on the guide and main beams during the jacking process, preventing damage to the joints caused by alternating positive and negative bending moments during the jacking operation. This maximizes the safety and efficiency of the jacking operation. Furthermore, the device can be assembled according to the actual size of the bridge, adapting to jacking construction of steel truss bridges with varying spans, demonstrating a degree of universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention, and the exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0016] Figure 1 This is a schematic diagram of the jacking operation of the guide beam and the first section of the main beam;

[0017] Figure 2This is a schematic diagram of the jacking operation of the guide beam and the first and second sections of the main beams;

[0018] Figure 3 This is a side view of the auxiliary reinforcement device for jacking construction;

[0019] Figure 4 This is a schematic diagram of the control center;

[0020] In the figure: 1 is the control center, 2 is the first sliding wheel, 3 is the second sliding wheel, 4 is the steel cable, 5 is the control lifting point, 6 is the guide beam, 7 is the first section main beam, 8 is the second section main beam, 11 is the high-strength bolt, 12 is the clamping steel plate, 13 is the chain, 14 is the driving wheel, 15 is the electric motor, 20 is the first pier, 30 is the second pier, 40 is the first temporary pier, 50 is the second temporary pier, 60 is the third temporary pier, 70 is the fourth temporary pier, 80 is the three-way walking jacking system, 21 is the first sliding mast, 31 is the second sliding mast, 22 is the stiffening plate, 32 is the bolt plate, 24 is the sliding wheel shaft, 25 is the cross beam, 26 is the cross connection system, and 27 is the longitudinal beam. DETAILED DESCRIPTION

[0021] The technical solutions and process flows in the embodiments of the present invention are clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively understand each technical feature and overall technical solution of the present invention and more clearly understand the process flow of the present invention. However, they should not be understood as limiting the scope of protection of the present invention. Based on the embodiments summarized by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work fall within the scope of protection of the present invention.

[0022] The present invention provides an auxiliary reinforcement device for the top-pushing construction of an assembled steel truss bridge, comprising a bridge system, a control center (1), a sliding mast (21, 31), a control suspension point (5), a steel cable (4) and a reinforcement assembly. The bridge system comprises a guide beam (6), a first section main beam (7), a second section main beam (8), a first bridge pier (20), a second bridge pier (30), and four temporary piers (40, 50, 60, 70). The guide beam and the main beam are composed of a cross beam (25), a longitudinal beam (27) and a cross-connection system (26). The control center (1) comprises a high-strength bolt (11), a clamping steel plate (12), a chain (13), a driving wheel (14) and an electric motor (15); the sliding mast (21, 31) comprises a top sliding wheel (2, 3), a stiffening plate (22) and a bolt plate (32).

[0023] The guide beam (6), the first section main beam (7) and the second section main beam (8) are constructed in an assembled manner, and a three-way walking type pushing device (80) is arranged on the bridge piers (20, 30) and temporary piers (40, 50, 60, 70) for pushing operations.

[0024] Furthermore, sliding wheels (2, 3) are provided on the top of the sliding mast (21, 31) for bidirectional sliding of the steel cable (4), and the bottom of the sliding mast is clamped and fixed on the steel truss bridge by a bolt plate (32) and corresponding bolts, and is auxiliary reinforced by a stiffening plate (22).

[0025] Furthermore, the control suspension point (5) is arranged at the position of the guide beam (6) and is clamped and fixed by a bolt plate (32) and matching bolts.

[0026] Furthermore, the control center (1) is fixed to the main beam by means of high-strength bolts (11) and clamping steel plates (12). The working principle is that a motor (15) drives a chain (13) to control the rotation of a driving wheel (14). The driving wheel (14) is connected to a steel cable (4) to realize the function of retracting and extending the steel cable, thereby realizing the function of lifting and lowering the control lifting point (5).

[0027] Preferably, the number of the control suspension points (5) is greater than one, and the number of the sliding masts is greater than one, which are specifically selected according to the actual scale of the steel truss bridge.

[0028] During the jacking process of only the guide beam and the first section main beam, the guide beam (6) is connected to the first section main beam (7) for jacking operation, the control lifting point (5) is arranged at the position of the guide beam (6) and is clamped and fixed by the bolt plate (32) and the matching bolts, the first sliding mast (21) is arranged in the middle and rear area of ​​the first section main beam (7), the control center (1) is arranged at the end of the main beam, the control lifting point and the first sliding wheel (2) at the top of the first sliding mast are passed through a steel cable (4), and the right side of the steel cable is connected to the driving wheel (14) of the control center.

[0029] During the pushing process of the guide beam and the first and second main beams, the guide beam (6), the first main beam (7) and the second main beam (8) are assembled and connected for pushing operation, the control lifting point (5) is arranged at the position of the guide beam (6) and is clamped and fixed by the bolt plate (32) and the matching bolts, the first sliding mast (21) is arranged in the middle and rear section of the first main beam (7), the second sliding mast (31) is arranged in the middle and rear section of the second main beam (8), the control center (1) is arranged at the end of the main beam, the first sliding wheel (2) and the second sliding wheel (3) arranged at the control lifting point and the top of the first sliding mast and the second sliding mast are respectively passed through a steel cable (4), and the right side of the steel cable is connected to the driving wheel (14) of the control center.

[0030] Finally, it should be noted that the embodiments provided by the present invention are for the convenience of explanation based on the accompanying drawings. In actual practice, control lifting points and sliding masts are respectively arranged on the left and right trusses of the steel truss bridge, and the number of control lifting points and sliding masts depends on the actual scale of the bridge. The first and second in the embodiment are only for the convenience of explanation and do not imply importance. Those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present invention.

Claims

1. An auxiliary reinforcement device for jacking construction of assembled steel truss bridges, characterized by: The auxiliary reinforcement device for the jacking construction of the assembled steel truss bridge includes a bridge system, a control center, a sliding mast, a control lifting point, steel cables and reinforcement components. The bridge system includes a guide beam, a first section main beam, a second section main beam, a first pier, a second pier and four temporary piers; The control center includes high-strength bolts, clamping steel plates, chains, driving wheels and electric motors; The sliding mast includes a top sliding wheel, a stiffening plate and a bolt plate.

2. The auxiliary reinforcement device for jacking construction of an assembled steel truss bridge according to claim 1, characterized in that: The guide beam, the first section main beam and the second section main beam are constructed in an assembled manner, and three-way walking-type jacking devices are arranged on the piers and temporary piers for jacking operations.

3. The auxiliary reinforcement device for jacking construction of an assembled steel truss bridge according to claim 1 is characterized in that: The top of the sliding mast is provided with a sliding wheel for bidirectional sliding of the steel cable. The bottom of the sliding mast is clamped and fixed on the steel truss bridge by a bolt plate and corresponding bolts, and is auxiliary reinforced by a stiffening plate.

4. The auxiliary reinforcement device for jacking construction of an assembled steel truss bridge according to claim 1 is characterized in that: The control hanging point is arranged at the guide beam position and is clamped and fixed by a bolt plate and matching bolts.

5. The auxiliary reinforcement device for jacking construction of an assembled steel truss bridge according to claim 1 is characterized in that: The control center is fixed on the main beam by high-strength bolts and clamping steel plates. The working principle is to control the rotation of the driving wheel by driving the chain through an electric motor. The driving wheel is connected to a steel cable to realize the retraction and extension function of the steel cable, thereby realizing the lifting and lowering function of the control lifting point.

6. The auxiliary reinforcement device for jacking construction of an assembled steel truss bridge according to claim 1, characterized in that: The number of the control suspension points is greater than one, and the number of the sliding masts is greater than one, which are selected according to the actual scale of the steel truss bridge.

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