Supporting structure suitable for high-altitude crossover bridge girder erection operation

Abstract

The utility model discloses a supporting structure suitable for high-altitude crossover bridge girder erection operation, belongs to the field of bridge construction, and aims to reduce construction difficulty and cost. The retaining wall is arranged on the bridge pier column and is through in the longitudinal direction. A plurality of reinforced concrete temporary buttresses are distributed along the longitudinal direction of the retaining wall, reinforced concrete temporary buttresses are distributed at the top ends of the bridge pier columns, and the reinforced concrete temporary buttresses are located in the middles of the bridge pier columns along the longitudinal direction; the retaining wall is connected with a reserved steel bar of the bridge pier column; the bottom end of a reinforcement cage of the reinforced concrete temporary buttress is in lap joint with a reserved steel bar of the bridge pier column; a reinforcement cage of the reinforced concrete temporary buttress is fixed with a reinforcement of the retaining wall; and the retaining wall and concrete of the reinforced concrete temporary buttress are poured together. The supporting leg fulcrum of the bridge girder erection machine is transferred to the back wall on the bridge pier column from the ground, the acceptance performance is good, the requirement for the ground bearing capacity is not affected, the foundation reinforcement treatment construction cost is saved, and the labor and material cost needed for erecting the supporting frame body is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, in particular to a supporting structure suitable for beam erection operations of a high-altitude crossover bridge. Background Art

[0002] In the process of municipal and highway construction, especially in mountainous highway projects, bridges often need to be erected, and bridge erection machines are often installed when erecting bridges. One of the traditional ways to install bridge erection machines is to erect a support frame from the ground, and the legs of the bridge erection machine are erected on the support frame. However, when constructing a crossover bridge in mountainous areas, erecting a support frame from the ground to support the legs of the bridge erection machine has the following disadvantages:

[0003] First, there are construction difficulties:

[0004] The construction method of erecting a temporary support frame is to support the ground, which has high requirements on the ground bearing capacity. In addition, mountainous areas often have problems such as steep terrain, which makes it difficult to erect the support frame. It takes a lot of time to erect the support frame, and there are great safety hazards due to the high-altitude erection.

[0005] Second, the cost is too high:

[0006] The support frame needs to bear the load of the bridge-erecting machine and the T-beam, and the bridge-erecting machine and the T-beam themselves are heavy, which places high stress requirements on the support frame material, consumes more materials, and incurs higher costs. Utility Model Content

[0007] The purpose of the utility model is to solve the drawbacks of currently using a ground-mounted support frame to erect the legs of a bridge-building machine, to provide a support structure suitable for high-altitude crossover bridge beam erection operations, to reduce construction difficulty and cost, to save construction time, and to ensure safety.

[0008] The technical scheme adopted by the utility model is: a supporting structure suitable for the beam erection operation of a high-altitude crossover bridge, comprising two rows of bridge piers separated on both sides of a T-beam along the longitudinal direction of the crossover bridge, and a back wall penetrating in the longitudinal direction is respectively arranged on each row of bridge piers; the back wall comprises a retaining wall and a reinforced concrete temporary pier; the retaining wall is arranged on the bridge pier and penetrates in the longitudinal direction; a plurality of the reinforced concrete temporary piers are distributed in the longitudinal direction of the retaining wall, and the reinforced concrete temporary piers are distributed on the top of each bridge pier, and the reinforced concrete temporary piers are located in the middle of the bridge pier in the longitudinal direction; the retaining wall is connected with the reserved steel bars of the bridge pier; the bottom end of the steel cage of the reinforced concrete temporary pier is overlapped with the reserved steel bars of the bridge pier; and the steel cage of the reinforced concrete temporary pier is fixed with the steel bars of the retaining wall; the retaining wall and the concrete of the reinforced concrete temporary pier are cast together.

[0009] Furthermore, a reinforced concrete connecting pier is arranged between the reinforced concrete temporary piers on two adjacent bridge piers, the steel cage of the reinforced concrete connecting pier is tied together with the steel bars of the retaining wall, and the retaining wall and the concrete of the reinforced concrete connecting pier are cast together.

[0010] Furthermore, a fulcrum is arranged on the top of the temporary reinforced concrete pier.

[0011] Furthermore, the top and bottom surfaces of the reinforced concrete temporary pier are parallel to each other in the vertical direction, and the area of ​​the bottom surface is smaller than that of the top surface; the orthographic projection of the reinforced concrete temporary pier along the horizontal direction of the crossover is a rectangle, and the orthographic projection in the vertical plane along the longitudinal direction of the crossover is a right trapezoid or a pentagon, and the hypotenuse of the right trapezoid formed by the orthographic projection in the vertical plane is located on the outside, and the inner side of the pentagon formed by the orthographic projection in the vertical plane is vertical, and the outer side includes a vertical section located at the top and an inclined section located at the bottom.

[0012] Furthermore, the reinforced concrete temporary pier is located in the middle of the top of the bridge pier column in the longitudinal direction and is located outside the top of the bridge pier column in the transverse direction.

[0013] Furthermore, a cushion stone is arranged on the top of the bridge pier, and the cushion stone is located laterally inside the reinforced concrete temporary pier.

[0014] The beneficial effects of the utility model are as follows: firstly, the fulcrum of the bridge-erecting machine legs is transferred from the ground to the back wall composed of the temporary reinforced concrete piers and retaining walls on the bridge piers, which has no effect on the ground bearing capacity requirements and underground pipelines, and solves the problem of erecting a large number of support frames in the prior art.

[0015] Furthermore, the utility model patent does not need to set up a large number of supporting frames, that is, there is no need to treat the foundation of the frame setting area, saving the reinforcement construction cost.

[0016] Thirdly, the supporting points of the bridge-erecting machine legs are set on the back wall composed of the temporary reinforced concrete piers and the retaining wall. The back wall transfers the load to the bridge piers. The bridge piers are buried deep and are set on relatively hard rocks underground. There is no need to consider problems caused by excessive stress and deformation of the frame due to the large load when erecting the bridge.

[0017] Fourthly, it saves the labor and material costs required for erecting the support frame, saves the construction time consumed in erecting the support frame, and effectively reduces the safety risks of erecting the frame at high altitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the front view of the utility model;

[0019] Figure 2 It is the left view of the utility model.

[0020] In the figure, there are bridge piers 1, pad stones 2, reinforced concrete temporary piers 3, retaining walls 4, T-beams 5, fulcrums 6, and reinforced concrete connecting piers 7. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0022] In the present utility model, terms such as "center", "lateral", "longitudinal", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", and "bottom" indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as limiting the specific scope of protection of the present application.

[0023] Suitable for supporting structures of overhead crossover bridge beam erection operations, such as Figure 1 and Figure 2 As shown, it includes two rows of bridge piers 1 separated on both sides of the T-beam 5 along the longitudinal direction of the crossover, and a back wall penetrating along the longitudinal direction is arranged on each row of bridge piers 1; the back wall includes a retaining wall 4 and a reinforced concrete temporary pier 3; the retaining wall 4 is arranged on the bridge pier 1 and penetrates along the longitudinal direction; a plurality of the reinforced concrete temporary piers 3 are distributed along the longitudinal direction of the retaining wall 4, and the reinforced concrete temporary pier 3 is distributed on the top of each bridge pier 1, and the reinforced concrete temporary pier 3 is located in the middle of the bridge pier 1 along the longitudinal direction; the retaining wall 4 is connected with the reserved steel bars of the bridge pier 1; the bottom end of the steel cage of the reinforced concrete temporary pier 3 is overlapped with the reserved steel bars of the bridge pier 1; and the steel cage of the reinforced concrete temporary pier 3 is fixed together with the steel bars of the retaining wall 4; the retaining wall 4 and the concrete of the reinforced concrete temporary pier 3 are cast together.

[0024] Before pouring the bridge pier 1, steel bars are reserved at the top. After the concrete pouring of the bridge pier 1 is completed, the retaining wall 4 can be constructed. The retaining wall 4 is connected to the reserved steel bars by welding at the reserved position of the bridge pier 1 and is arranged on the bridge pier 1 in a rectangular shape along the longitudinal direction, that is, the retaining wall 4 is connected along the longitudinal direction to form two rows of bridge pier 1 tops on both sides of the T-beam 5. The steel cage of the reinforced concrete temporary pier 3 is welded to the steel bars of the retaining wall 4, and the bottom of the reinforced concrete temporary pier 3 is overlapped with the steel bars of the bridge pier 1. According to the cross-sectional size of the bridge pier 1 and the position of the T-beam 5, the top and bottom surfaces of the reinforced concrete temporary pier 3 are parallel to each other in the vertical direction, and the bottom surface area is smaller than the top surface area; the orthographic projection of the reinforced concrete temporary pier 3 along the horizontal direction of the crossover is a rectangle, and the orthographic projection in the vertical plane along the longitudinal direction of the crossover is a right-angled trapezoid or a pentagon, and the hypotenuse of the right-angled trapezoid formed by the orthographic projection in the vertical plane is located on the outside, and the inner side of the pentagon formed by the orthographic projection in the vertical plane is vertical, and the outer side includes a vertical section located above and an inclined section located below. After the steel cage of the reinforced concrete temporary pier 3 is firmly welded to the steel bars of the retaining wall 4, the template can be installed, and concrete can be poured after the template installation is completed. At the same time, the concrete pad stone 2 can be constructed.

[0025] If only reinforced concrete temporary piers 3 are set on the bridge piers 1, there is a problem that the distance between two adjacent reinforced concrete temporary piers 3 is large. In order to increase the density of piers, better support the bridge erection machine, and transmit the force, preferably, a reinforced concrete connecting pier 7 is set between the reinforced concrete temporary piers 3 on the two adjacent bridge piers 1. The steel cage of the reinforced concrete connecting pier 7 is tied together with the steel bars of the retaining wall 4, and the retaining wall 4 is cast together with the concrete of the reinforced concrete connecting pier 7. The reinforced concrete connecting pier 7 can adopt the same structure as the reinforced concrete temporary pier 3. The top of the reinforced concrete connecting pier 7 is also provided with a fulcrum 6.

[0026] After the reinforced concrete reaches the curing age, the bridge erection machine can be set up on the supporting structure, and the supporting points of the legs at both ends of the bridge erection machine can be respectively set on the supporting points 6 of the corresponding reinforced concrete temporary piers 3. After the curing age of the cushion stone 2 is reached, the T beam 5 can be hoisted, and the T beam 5 is hoisted to the cushion stone in the center of the two piers. After the installation of the T beam 5 is completed, the bridge erection machine can be removed. The back wall does not need to be removed, and can become a bridge load-bearing structure together with the T beam.

[0027] The “outside” and “inside” mentioned in this embodiment represent relative positional relationships, that which is relatively closer to the installation area of ​​the T-beam 5 is the “inside”, and that which is relatively farther from the installation area of ​​the T-beam 5 is the “outside”.

[0028] The utility model realizes structural co-construction by connecting the temporary reinforced concrete pier 3 with the retaining wall 4, optimizes the structural integration design scheme, avoids setting up a large number of support legs for supporting the legs of the bridge erection machine, reduces the impact of the project construction on the ecological environment and the project construction cost, and at the same time improves the construction efficiency, reduces the difficulty of construction coordination, and ensures the construction quality and safety.

[0029] The structural steel bars involved are all connected by welding to form a whole. After the steel bars are connected, formwork support is carried out. After the formwork support is completed, concrete is poured to form a whole, ensuring the safety and stability of the structure during the installation of the bridge erection machine and the beam erection operation. During the beam erection operation, the load is transmitted to the reinforced concrete temporary pier 3 and the retaining wall 4 through the fulcrum 6, and then transmitted to the bridge pier 1, and then transmitted to the underground bearing layer through the bridge pier 1. Since the bridge pier 1 is buried deep and the bottom of the bridge pier 1 reaches the bearing layer, it can effectively bear the load transmitted from the upper part, thereby avoiding the risk of collapse due to insufficient ground bearing capacity when erecting the support, and there is no need to treat the ground foundation, which can save a lot of construction costs while reducing the impact on the ecological environment, and also ensure construction quality and safety.

[0030] The bridge pier 1, pad stone 2, reinforced concrete temporary pier 3 and back wall 4 are all reinforced concrete cast-in-place structures. After the beam erection operation is completed, the bridge erection machine can be dismantled, and the reinforced concrete temporary pier 3 and back wall 4 are connected with the prefabricated T-beam 5 through wet joints and bear the force together. They do not need to be dismantled, which does not affect the overall appearance of the bridge and can bear the force together with the bridge, effectively ensuring the quality and stability of the bridge.

Claims

1. A support structure suitable for overhead crossover bridge beam erection operations, comprising two rows of bridge piers (1) separated along the longitudinal direction of the crossover bridge on both sides of a T-beam (5), characterized in that: A back wall is provided on each row of bridge piers (1) and extends in the longitudinal direction; the back wall comprises a retaining wall (4) and a reinforced concrete temporary pier (3); the retaining wall (4) is provided on the bridge pier (1) and extends in the longitudinal direction; a plurality of the reinforced concrete temporary piers (3) are distributed in the longitudinal direction of the retaining wall (4), and the top of each bridge pier (1) is provided with the reinforced concrete temporary pier (3), and the reinforced concrete temporary pier (3) is located in the middle of the bridge pier (1) in the longitudinal direction; the retaining wall (4) is connected to the reserved steel bars of the bridge pier (1); the bottom end of the steel cage of the reinforced concrete temporary pier (3) is overlapped with the reserved steel bars of the bridge pier (1); and the steel cage of the reinforced concrete temporary pier (3) is fixed to the steel bars of the retaining wall (4); the retaining wall (4) and the concrete of the reinforced concrete temporary pier (3) are cast together.

2. The supporting structure suitable for overhead crossover bridge beam erection operation as claimed in claim 1, characterized in that: A reinforced concrete connecting pier (7) is arranged between the reinforced concrete temporary piers (3) on two adjacent bridge piers (1); the steel cage of the reinforced concrete connecting pier (7) is tied together with the steel bars of the retaining wall (4); and the retaining wall (4) and the concrete of the reinforced concrete connecting pier (7) are cast together.

3. The supporting structure suitable for overhead crossover bridge beam erection operation as claimed in claim 1 or 2, characterized in that: A fulcrum (6) is arranged on the top of the reinforced concrete temporary buttress (3).

4. The supporting structure suitable for overhead crossover bridge beam erection operation as claimed in claim 1 or 2, characterized in that: The top and bottom surfaces of the reinforced concrete temporary pier (3) are parallel to each other in the vertical direction, and the area of ​​the bottom surface is smaller than that of the top surface; the orthographic projection of the reinforced concrete temporary pier (3) along the horizontal direction of the crossover is a rectangle, and the orthographic projection in the vertical plane along the longitudinal direction of the crossover is a right-angled trapezoid or a pentagon, and the hypotenuse of the right-angled trapezoid formed by the orthographic projection in the vertical plane is located on the outside, and the inner side of the pentagon formed by the orthographic projection in the vertical plane is vertical, and the outer side includes a vertical section located at the top and an inclined section located at the bottom.

5. The supporting structure suitable for overhead crossover bridge beam erection operation as claimed in claim 1 or 2, characterized in that: The reinforced concrete temporary supporting pier (3) is located in the middle of the top of the bridge pier (1) in the longitudinal direction and is located outside the top of the bridge pier (1) in the transverse direction.

6. The supporting structure suitable for overhead crossover bridge beam erection operation as claimed in claim 5, characterized in that: A cushion stone (2) is arranged on the top of the bridge pier (1), and the cushion stone (2) is located laterally inside a reinforced concrete temporary supporting pier (3).

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