Small-angle corner trestle structure for bridge construction

Abstract

The utility model discloses a small-angle corner trestle structure for bridge construction, which comprises a linear section and a corner section, the corner section is provided with a corner first-layer main beam, a corner second-layer main beam and a corner third-layer main beam, and the corner first-layer main beam, the corner second-layer main beam and the corner third-layer main beam are sequentially erected and fixedly connected. The small-angle corner trestle structure for bridge construction is small in welding amount, high in construction efficiency and low in construction cost.

Description

Technical Field

[0001] The utility model belongs to the field of bridge construction, and specifically relates to a small-angle corner trestle structure used for bridge construction. Background Art

[0002] At present, the bridge construction field mainly adopts straight trestles, L-shaped trestles and other structures, which cannot meet the needs of curved bridge construction. With the increasing demand for curved bridge construction, in order to meet the needs of curved cross-river bridge construction, the trestles used in bridge construction need to change with the line shape of the bridge. How to achieve small-angle turning of this trestles has become an urgent need in current engineering construction.

[0003] The utility model patent with announcement number CN211285286U was published on August 18, 2020. The name is a corner structure for installing bridge steel formwork. The corner structure includes a frame-type bracket, and the two ends of the bottom of the frame-type bracket are hinged with rotating rods. The rotating rods at both ends of the frame-type bracket are provided with hinge seats. The frame-type bracket is provided with a limiting mechanism for limiting the rotating rod. The limiting mechanism includes a telescopic rod fixed to the upper end of the frame-type bracket, the bottom end of the telescopic rod is hinged with the hinge seat, the bottom end of the telescopic rod is fixedly connected with a connecting rod perpendicular to the telescopic rod, and the connecting rod is provided with a support plate arranged perpendicular to the connecting rod; the frame-type bracket, the rotating rod and the support plate together constitute the bracket used for the inner formwork of the bridge. This corner structure cannot realize a small angle turn of the trestle. Utility Model Content

[0004] The utility model aims to provide a small-angle corner trestle structure for bridge construction with less welding amount, high construction efficiency and low construction cost in view of the shortcomings of the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The bridge is constructed with a small-angle corner trestle structure, which includes a straight segment and a corner segment. The corner segment is provided with a first-layer corner main beam, a second-layer corner main beam and a third-layer corner main beam. The first-layer corner main beam, the second-layer corner main beam and the third-layer corner main beam are sequentially erected and fixedly connected.

[0007] Steel pipe piles are provided at the bottom of the pier, and the steel pipe piles are provided below the ends of the straight segments and the corner segments. A lower cross beam is provided at the top of the steel pipe piles. The straight segments include Bailey beams and transverse distribution beams. The Bailey beams are provided at the upper end of the lower cross beams, and the transverse distribution beams are provided at the upper end of the Bailey beams. The upper end of the lower cross beam located below the corner segment is fixedly connected to one end of the Bailey beam and one end of the first-layer main beam of the corner.

[0008] A longitudinal distribution beam is provided at the upper end of the transverse distribution beam, a corner transverse distribution beam is provided at the upper end of the corner third-layer main beam, the corner first-layer main beam and the corner third-layer main beam are both arranged in the longitudinal direction of the bridge, and the corner second-layer main beam and the corner transverse distribution beam are both arranged in the transverse direction of the bridge.

[0009] The longitudinal distribution beams and the corner transverse distribution beams are at the same height, and the longitudinal distribution beams and the corner transverse distribution beams are arranged in sequence to form a bridge deck.

[0010] The first-layer main beams at the corner and the third-layer main beams at the corner are arranged at equal intervals, and the second-layer main beams at the corner are located at both sides of the corner segment.

[0011] The lower cross beam, the first-layer main beam at the corner, the second-layer main beam at the corner, the third-layer main beam at the corner and the transverse distribution beam at the corner are all welded and fixed.

[0012] Flat joints are arranged between the steel pipe piles, and protective railings are arranged on both sides of the trestle.

[0013] The technical effect of the utility model is as follows: the small-angle corner trestle structure for bridge construction of the utility model is adopted, and the structural form of variable-section multi-layer steel main beams is adopted. The steel main beams are laid in layers at a certain interval in the corner triangle area on the trestle steel pipe piles and the lower crossbeam, so that the small-angle corner trestle can be quickly erected, which can meet the construction needs of curved bridges and solve the problems of difficult construction and low efficiency in the prior art; the structure does not require a large amount of welding, and all of them are flat corner welds, with fast construction speed, simple structure, clear force, and can be prefabricated in advance for overall hoisting. The construction is convenient and quick, which can greatly speed up the trestle erection progress. After construction, the trestle structure is safe and reliable, the materials can be circulated and used, and the construction cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] This specification includes the following drawings, which show the following contents:

[0015] Figure 1 It is a top view of a small-angle corner trestle structure for bridge construction of the utility model;

[0016] Figure 2 It is a front view of a small-angle corner trestle structure for bridge construction of the utility model;

[0017] Figure 3 yes Figure 1 Structural schematic diagram of section AA;

[0018] Figure 4 yes Figure 1 Schematic diagram of the structure of section BB.

[0019] The markings in the figure are: 1. Steel pipe piles; 2. Flat joints; 3. Lower cross beams; 4. Bailey beams; 5. Horizontal distribution beams; 6. Longitudinal distribution beams; 7. Guardrails; 8. First-layer main beams at corners; 9. Second-layer main beams at corners; 10. Third-layer main beams at corners; 11. Horizontal distribution beams at corners. DETAILED DESCRIPTION

[0020] The specific implementation methods of the utility model are further explained in detail below with reference to the accompanying drawings through the description of embodiments, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0021] like Figures 1 to 4 As shown, the bridge construction uses a small-angle corner trestle structure, the trestle includes a straight segment and a corner segment, the corner segment is provided with a corner first-layer main beam 8, a corner second-layer main beam 9 and a corner third-layer main beam 10, the corner first-layer main beam 8, the corner second-layer main beam 9 and the corner third-layer main beam 10 are erected in sequence and fixedly connected.

[0022] The small-angle corner trestle structure used in the bridge construction adopts the structure of variable-section multi-layer steel beams. The steel beams are laid in layers at a certain interval in the corner triangle area on the trestle steel pipe pile 1 and the lower crossbeam 3, and the bridge deck elevation of the triangle area is kept consistent with the standard bridge deck elevation on both sides. During construction, the steel beams are cut according to the size of the corner triangle area, and after being installed layer by layer and welded in place, the bridge deck is installed, which can quickly realize the small-angle turning of the trestle. It has the advantages of fast construction speed, clear structural force, overall prefabrication and hoisting, convenient and fast construction, and low construction cost. The corner segment structure of the trestle is simple, and the material only needs to be steel beams, so the components can be prefabricated, and the purpose of rapid construction can be achieved by hoisting, erecting and welding layer by layer during construction.

[0023] like Figures 2 to 4 As shown, a steel pipe pile 1 is provided at the bottom of the trestle, and the steel pipe pile 1 is provided below the end of the straight segment and the corner segment. A lower crossbeam 3 is provided at the top of the steel pipe pile 1. The straight segment includes a Bailey beam 4 and a transverse distribution beam 5. The Bailey beam 4 is provided at the upper end of the lower crossbeam 3, and the transverse distribution beam 5 is provided at the upper end of the Bailey beam 4. The upper end of the lower crossbeam 3 located below the corner segment is fixedly connected to one end of the Bailey beam 4 and one end of the first-layer main beam 8 of the corner. The Bailey beam 4 is used as the bridge structure of the straight segment. It has a simple structure and high bearing capacity. It can be easily assembled into different spans required for construction according to actual conditions. It also has the advantages of being easy to install, disassemble and transport. The lower crossbeam 3 set on the steel pipe pile 1 supporting the corner segment can simultaneously support the Bailey beam 4 and the first-layer main beam 8 of the corner, so as to achieve synchronous fixation of the straight segment and the corner segment, which is conducive to making full use of the construction space and improving the integrity of the trestle structure.

[0024] like Figures 1 to 4 As shown, a longitudinal distribution beam 6 is provided at the upper end of the transverse distribution beam 5, a corner transverse distribution beam 12 is provided at the upper end of the third-layer main beam 10, the first-layer main beam 8 and the third-layer main beam 10 are both arranged in the longitudinal direction, and the second-layer main beam 9 and the corner transverse distribution beam 12 are both arranged in the transverse direction. The steel beams of the above-mentioned corner segment are arranged alternately in the longitudinal direction and the transverse direction, that is, the layout of each layer of steel beams and the steel beams of the upper and lower layers is a cross structure. When the construction of one layer of steel beams is in progress, the steel beams of the lower layer will not interfere with the construction operation of the current layer. The construction workers have enough construction space to complete the construction, and the construction process is more convenient and quick. In addition, the alternating layout structure of the longitudinal direction and the transverse direction provides evenly distributed welding positions for the fixation of the adjacent layers of steel beams. After the steel beams of each layer are welded and fixed, a firm and reliable integral structure can be formed.

[0025] like Figure 2 As shown, the longitudinal distribution beam 6 and the corner transverse distribution beam 12 are at the same height, and the longitudinal distribution beam 6 and the corner transverse distribution beam 12 are sequentially arranged to form a bridge deck. After the structure below the bridge deck is completed, the longitudinal distribution beam 6 and the corner transverse distribution beam 12 only need to be constructed at a certain interval and ensure that the heights of the two are uniform and consistent to complete the construction of the bridge deck.

[0026] like Figure 1 As shown, the first-layer corner beam 8 and the third-layer corner beam 10 are arranged at equal intervals, and the second-layer corner beam 9 is located on both sides of the corner segment. The above structure is installed at a certain interval to provide uniform welding positions for the steel beams of adjacent layers, which is beneficial to improving the integrity of the trestle in the corner area.

[0027] The lower cross beam 3, the first layer main beam 8, the second layer main beam 9, the third layer main beam 10 and the transverse distribution beam 12 are all welded and fixed. The steel beam is fixed with fillet welds and stiffeners. The fixing position is located at the bottom and side of the steel beam. The construction operation is simple and convenient. The above components are set up and welded in turn to achieve rapid construction.

[0028] like Figure 1 , Figure 3 and Figure 4 As shown, a tie 2 is provided between the steel pipe piles 1, and guardrails 7 are provided on both sides of the trestle. The tie 2 is arranged horizontally, and can stably support the adjacent steel pipe piles 1, ensure the stability of the construction process of the trestle, and the guardrails 7 play a role in safety protection.

[0029] Embodiment: The steel pipe pile 1 is made of φ630×8mm steel pipe, the lower cross beam 3 is made of double-joined HW588×300 steel, and the Bailey beam 4 is made of 321 Bailey sheet. The first-layer main beam 8 and the second-layer main beam 9 of the corner are both made of double-joined HW588×300 steel, the third-layer main beam 10 of the corner is made of single-joined HW588×300 steel, the transverse distribution beam 5 is made of I-25 I-beam, the longitudinal distribution beam 6 and the transverse distribution beam 12 of the corner are both made of 28 # Channel steel, flat joint 2 uses 28 # Channel steel and guardrail 7 are made of φ48×3.5 steel pipe.

[0030] The first-layer main beam 8 of the corner is placed longitudinally on the lower cross beam 3 of the standard span steel trestles on both sides, and the first-layer main beam 8 of the corner is connected to the lower cross beam 3 by fillet welds and stiffening plates, and its length is cut according to the longitudinal span of the corresponding part of the triangular area. The second-layer main beam 9 of the corner is placed transversely on the first-layer main beam, and the main beam and the first-layer main beam are connected by fillet welds and stiffening plates. Its length is cut according to the width of the trestles and takes into account the space inside the corner. If there is insufficient space, a single main beam can be used. The third-layer main beam 10 of the corner is placed longitudinally on the second-layer main beam 9 of the corner, and the third-layer main beam 10 of the corner is connected to the second-layer main beam 9 of the corner by fillet welds and stiffening plates. Its length is cut according to the longitudinal span of the corresponding part of the triangular area. Its length is cut according to the longitudinal span of the corresponding part of the triangular area. The spacing should meet the force requirements of the bridge deck under the maximum design load, which is 75cm in this embodiment. The corner transverse distribution beam 12 and bridge deck are placed on the third-layer main beam 10 of the corner in the transverse direction, with a spacing of 32cm, and are firmly welded to the third-layer main beam by fillet welds. After the three-layer main beam and bridge deck are installed, they are consistent with the Bailey beam 4 bridge deck on both sides. The bridge deck is smooth and meets the requirements of construction equipment passage or construction operations. The steel type and spacing are determined according to the actual trestle superstructure height and the calculated span of the distribution beams of each layer in the corner triangle area.

[0031] The small-angle corner trestle structure used in the bridge construction adopts a variable-section multi-layer steel main beam structure. The steel main beams are laid in layers at a certain interval in the corner triangle area on the trestle steel pipe piles 1 and the lower crossbeam 3, which can realize the rapid erection of the small-angle corner trestle, meet the construction needs of curved bridges, and solve the problems of difficult construction and low efficiency in the existing technology. The structure does not require a lot of welding, and all are flat corner welds. The construction speed is fast, and the structure is simple, the force is clear, and the overall hoisting can be prefabricated in advance. The construction is convenient and fast, which can greatly speed up the trestle erection progress. After construction, the trestle structure is safe and reliable, the materials can be circulated, and the construction cost is low.

[0032] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A small-angle corner trestle structure for bridge construction, characterized in that: The trestle comprises a straight section and a corner section, wherein the corner section is provided with a first-layer corner main beam (8), a second-layer corner main beam (9) and a third-layer corner main beam (10), and the first-layer corner main beam (8), the second-layer corner main beam (9) and the third-layer corner main beam (10) are sequentially erected and fixedly connected.

2. The small-angle corner trestle structure for bridge construction according to claim 1, characterized in that: The bottom of the trestle is provided with steel pipe piles (1), the steel pipe piles (1) are arranged below the ends of the straight segment and the corner segment, the top of the steel pipe piles (1) is provided with a lower cross beam (3), the straight segment includes a Bailey beam (4) and a transverse distribution beam (5), the Bailey beam (4) is arranged at the upper end of the lower cross beam (3), and the transverse distribution beam (5) is arranged at the upper end of the Bailey beam (4); the upper end of the lower cross beam (3) located below the corner segment is fixedly connected to one end of the Bailey beam (4) and one end of the first-layer main beam (8) of the corner.

3. The small-angle corner trestle structure for bridge construction according to claim 2, characterized in that: The upper end of the transverse distribution beam (5) is provided with a longitudinal distribution beam (6), the upper end of the corner third-layer main beam (10) is provided with a corner transverse distribution beam (12), the corner first-layer main beam (8) and the corner third-layer main beam (10) are both arranged in the longitudinal direction of the bridge, and the corner second-layer main beam (9) and the corner transverse distribution beam (12) are both arranged in the transverse direction of the bridge.

4. The small-angle corner trestle structure for bridge construction according to claim 3 is characterized in that: The longitudinal distribution beam (6) and the corner transverse distribution beam (12) are at the same height, and the longitudinal distribution beam (6) and the corner transverse distribution beam (12) are arranged in sequence to form a bridge deck.

5. The small-angle corner trestle structure for bridge construction according to claim 4, characterized in that: The first-layer corner main beam (8) and the third-layer corner main beam (10) are arranged at equal intervals, and the second-layer corner main beam (9) is located on both sides of the corner segment.

6. The small-angle corner trestle structure for bridge construction according to any one of claims 2 to 5, characterized in that: The lower cross beam (3), the first-layer corner main beam (8), the second-layer corner main beam (9), the third-layer corner main beam (10) and the corner transverse distribution beam (12) are all welded and fixed.

7. The small-angle corner trestle structure for bridge construction according to claim 6, characterized in that: A parallel connection (2) is provided between the steel pipe piles (1), and protective railings (7) are provided on both sides of the trestle.

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