A method for positioning and reinforcing a steel pipe support on a slope surface of a V-shaped pier of a bridge

Abstract

The invention discloses a method for positioning and reinforcing a steel pipe support on a slope surface of a V-shaped bridge pier, comprising the following steps: S1: construction of a pile foundation, a cap and a V-shaped pier; S2: erection of supports on both sides of the V-shaped pier; S3: binding of steel bar skeletons of wing plates on both sides of the V-shaped pier, positioning and embedding of positioning steel bars; S4: pouring wing plate concrete on the wing plates on both sides of the V-shaped pier; S5: laying of a gridded steel mesh; S6: installation and reinforcement of scaffolding above the wing plates on both sides of the V-shaped pier; S7: pouring concrete for the bridge span structure; S8: dismantling the supports and the supporting system, which facilitates the installation of the steel pipe supports, increases the overall stability of the supports, effectively solves the problem that the supports are difficult to erect, and ensures the quality and safety of concrete pouring on the deck of the V-shaped rigid frame arch bridge.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a method for positioning and reinforcing a steel pipe bracket on a slope surface of a V-shaped pier of a bridge. Background Art

[0002] Chinese utility model disclosure specification CN208748529U discloses a formwork support system for a V-shaped rigid frame arch bridge, including a support column, a cable and an arch rib support system, wherein the bottom of the support column is buried under the arch foot pedestal, and the arch rib support system includes a formwork, a wooden square, a longitudinal double steel pipe, a shoulder beam and a full-height bracket, and the formwork, the wooden square, the shoulder beam, the longitudinal double steel pipe and the full-height bracket are connected in sequence from top to bottom, the first end of the cable is connected to the support column, the second end of the cable passes through the formwork, the wooden square and the longitudinal double steel pipe in sequence, and the second end of the cable is connected to the shoulder beam. The utility model improves the bearing capacity of the formwork support system of the V-shaped rigid frame arch bridge by setting the arch rib support system, ensures the quality and safety of concrete pouring, and ensures the force safety of the V-shaped pier arch foot during construction, thereby ensuring the construction quality of the V-shaped steel structure arch bridge.

[0003] However, the prior art technology for installing steel pipe supports directly on the slope surface is prone to slippage after the concrete is poured and the support is subjected to load; when subjected to large wind loads, instability is also prone to occur without special reinforcement measures. If other specific reinforcement measures are taken, it will increase costs, prolong the construction period, and derive many unfavorable factors; the prior art pays more attention to the construction technology of the wing plates on both sides of the V-shaped inclined legs. After the construction of the V-shaped inclined legs is completed, there is a lack of detailed introduction on how to set up supports on the slope surface of the inclined legs to facilitate the pouring of bridge deck concrete, especially the setting up of supports on the inner slope surface of the V-shaped inclined legs, which has little overall reference significance. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a method for positioning and reinforcing a steel pipe support on the slope surface of a V-shaped pier of a bridge, by pre-installing positioning steel bars and setting up a gridded steel mesh at the V-shaped inclined legs, thereby facilitating the installation of the steel pipe support, increasing the overall stability of the support, and effectively solving the problem of difficulty in setting up the support, thereby ensuring the quality and safety of concrete pouring of the V-shaped rigid frame arch bridge deck.

[0005] The technical solution of the present invention is a method for positioning and reinforcing a steel pipe support on a slope surface of a V-shaped bridge pier, comprising the following steps:

[0006] S1: Construction of pile foundation, cap and V-pier column;

[0007] S2: Erection of brackets on both sides of the V-pier column;

[0008] S3: Tie the steel bar skeleton of the flange plates on both sides of the V-pier column, position them and embed the positioning steel bars;

[0009] S4: pouring wing concrete on both sides of the V-pier column;

[0010] S5: laying of mesh reinforcement mesh;

[0011] S6: Installation and reinforcement of scaffolding above the wing plates on both sides of the V-pier column;

[0012] S7: pouring of span structure concrete;

[0013] S8: Remove the bracket and support system.

[0014] Furthermore, the brackets on both sides of the V-shaped pier in S2 include a plurality of vertical poles, a plurality of longitudinal steel pipes and a plurality of transverse steel pipes, the vertical poles, the longitudinal steel pipes and the transverse steel pipes are vertically connected to each other, a steel plate is provided at the bottom of the vertical poles, and the plurality of vertical poles are welded to the steel plate.

[0015] Furthermore, drainage wells are opened under the steel plate, and the drainage wells are arranged on the left and right sides of the bridge. Drainage pumps are arranged in the drainage wells. A plurality of drainage pipes are also arranged under the steel plate, and the drainage pipes are arranged in the middle of the bridge.

[0016] Furthermore, multiple positioning steel bars are embedded in the wing plates on both sides of the V-pier column in S3, one end of the positioning steel bar is embedded in the wing plate, the embedding depth is half of the thickness of the wing plate, and the other end of the positioning steel bar should be 5-10 cm higher than the surface of the wing plate.

[0017] Furthermore, in S4, the pouring method of the wing plate concrete on both sides is symmetrical pouring on both sides, pouring from the bottom of the wing plate to the upper part.

[0018] Furthermore, in S5, the gridded steel mesh is laid on the top of the wing plate slope surface, and the gridded steel mesh includes transverse steel bars and longitudinal steel bars. The transverse steel bars and longitudinal steel bars are laid perpendicularly to each other to form a mesh structure. The transverse steel bars form a 90-degree angle with the positioning steel bars. The transverse steel bars, longitudinal steel bars and positioning steel bars are connected by welding.

[0019] Furthermore, the scaffolding in S6 includes a plurality of vertical poles, transverse steel pipes and longitudinal steel pipes, the vertical poles are sleeved on one end of the positioning steel bars, the vertical poles, transverse steel pipes and longitudinal steel pipes are vertically connected to each other, and the scaffolding is welded to the gridded steel mesh in S5, and the welding direction is vertical.

[0020] Furthermore, the method of pouring the concrete of the bridge span structure in S7 is to pour it symmetrically from both sides to the middle at the same time, and the pouring is continuous and uninterrupted.

[0021] Furthermore, the order of dismantling the brackets in S8 is to first dismantle the steel pipe brackets above the wing panels, and then dismantle the brackets below the wing panels and below the arch ring.

[0022] Compared with the prior art, the present invention is beneficial in that:

[0023] 1. A method for positioning and reinforcing steel pipe supports on the slope surface of a V-shaped pier column of a bridge is established. For the erection of the steel pipe supports on the upper part of the V-shaped inclined leg wing plate, according to the pre-designed steel pipe erection drawing, the steel bars are positioned in advance at the position of the steel pipe feet, and a steel bar grid is made to form an effective steel pipe foot ground grid control. The steel pipe scaffolding is welded to the steel bar grid to increase the stability of the steel pipe support, prevent local stress, and ensure the quality and safety of the concrete pouring of the V-shaped steel structure arch bridge and the forming effect of the arch bridge.

[0024] 2. The V-shaped rigid frame arch bridge cable-stayed formwork support balance system has clear force, convenient material acquisition, and simple production. It improves the bearing capacity of the local support system of the V-shaped rigid frame arch bridge, ensures the quality and safety of concrete pouring, has low construction costs, and meets national energy-saving and environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The invention provides a construction process for positioning and reinforcing a steel pipe support on a slope surface of a V-shaped bridge pier;

[0026] Figure 2 This is a schematic diagram of the positioning, installation and reinforcement of the steel pipe bracket at the V-shaped oblique leg;

[0027] Figure 3 yes Figure 2 A partial enlarged schematic diagram of middle Ⅰ;

[0028] Figure 4 yes Figure 2 Schematic diagram of the mesh steel mesh laid on the top of the wing plate;

[0029] Figure 5 It is a schematic diagram of support erection and concrete pouring;

[0030] Figure 6 This is the effect picture after the concrete pouring is completed and the support is removed;

[0031] In the figure: 1. Positioning steel bars; 2. Horizontal steel pipes; 21. Horizontal steel bars; 3. Vertical poles; 4. Longitudinal steel pipes; 41. Longitudinal steel bars; 5. Wing plates; 6. Steel plates; 7. Drainage wells; 8. Drainage pumps; 9. Shaped wooden boxes; 10. V-pier columns; 11. Caps; 12. Pile foundations; 13. Diagonal braces; 14. Bridge span structure; 151. Caps concrete; 152. Pier column concrete; 153. Wing plate concrete; 154. Bridge span structure concrete; 16. Drain pipes. DETAILED DESCRIPTION

[0032] Combine the following Figure 1-6 The embodiments of the present invention are described in detail. The following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0033] Example:

[0034] S1: Construction of pile foundation 12, cap 11 and V-pier 10;

[0035] S2: Erection of brackets on both sides of the V-pier 10;

[0036] S3: Tie the steel bars of the flange plates 5 on both sides of the V-shaped pier 10, position them and embed the positioning steel bars 1;

[0037] S4: pouring wing plate concrete 153 on both sides of the wing plate 5 of the V-pier column 10;

[0038] S5: laying of mesh reinforcement mesh;

[0039] S6: Installation and reinforcement of scaffolding above the wing plates on both sides of the V-pier column;

[0040] S7: pouring of span structure concrete 154 for the span structure 14;

[0041] S8: Remove the bracket and support system.

[0042] Furthermore, the supports on both sides of the V-pier in S2 include multiple vertical poles 3 and multiple longitudinal steel pipes 4. The vertical poles 3, longitudinal steel pipes 4 and transverse steel pipes 2 are vertically connected to each other. A steel plate 6 is provided at the bottom of the vertical poles 3, and the multiple vertical poles 3 are all fixedly connected to the steel plate 6.

[0043] Furthermore, a drainage well 7 is opened under the steel plate 6 , and the drainage well is arranged on the left and right sides of the bridge. A drainage pump 8 is arranged in the drainage well 7 .

[0044] Furthermore, a plurality of drainage pipes 16 are provided below the steel plate 6 , and the drainage pipes 16 are provided in the middle of the bridge.

[0045] Furthermore, multiple positioning steel bars 1 are embedded in the wing plates 5 on both sides of the V-pier 10 in S3, one end of the positioning steel bar is embedded in the wing plate 5, and the embedding depth is half of the thickness of the wing plate 5. The other end of the positioning steel bar 1 should be 5-10 cm higher than the surface of the wing plate 5.

[0046] Furthermore, in S4 , the wing plate concrete 153 of the wing plates 5 on both sides is poured symmetrically on both sides, from the bottom of the wing plate 5 to the upper part.

[0047] Furthermore, the gridded steel mesh in S5 is laid on the top of the slope surface of the wing plate 5, and the gridded steel mesh includes transverse steel bars 21 and longitudinal steel bars 41. The transverse steel bars 21 and the longitudinal steel bars 41 are laid perpendicular to each other to form a mesh structure. The transverse steel bars 21 form a 90-degree angle with the positioning steel bars 1. The transverse steel bars 21, the longitudinal steel bars 41 and the positioning steel bars 1 are connected by welding.

[0048] Furthermore, the steel pipe scaffolding set up in S6 should be welded with the gridded steel mesh in S5. The steel pipe scaffolding is an existing technology. The vertical verticality is adjusted while welding. The scaffolding includes multiple vertical poles 3, horizontal steel pipes 2 and longitudinal steel pipes 4. The vertical pole 3 is sleeved on one end of the positioning steel bar 1. The vertical pole 3, horizontal steel pipe 2 and longitudinal steel pipe 4 are vertically connected to each other. The scaffolding is welded to the gridded steel mesh in S5. The welding direction is vertical. The vertical and horizontal spacing of the scaffolding is 600mm. It is erected strictly according to the design dimensions. The joints of the vertical poles 3 and the horizontal rods should be staggered in different frame layers to ensure that the vertical deviation of the vertical poles 3 and the horizontal deviation of the cross bars are less than the requirements of the "Fastener Frame Specifications", to ensure that the quality of each fastener and steel pipe meets the requirements, and the tightening torque of each fastener should be controlled at 45-60N.m. It is forbidden to use steel pipes with deformed materials. At the position of the shaped wooden box 9, a diagonal brace 13 is used to support the shaped wooden box 9 at intervals of 500mm in the horizontal direction and 300mm in the longitudinal direction, and a through-screw is arranged at the foot of the shaped wooden box 9 to fix the shaped wooden box 9.

[0049] Furthermore, in S7, the method of pouring the bridge span structure concrete 154 of the bridge span structure 14 is to pour symmetrically from both sides to the middle simultaneously, and the pouring is continuous and uninterrupted.

[0050] Furthermore, the order of dismantling the brackets in S8 is to first dismantle the steel pipe brackets above the wing plate 5, and then dismantle the brackets below the wing plate 5 and below the arch ring. After the steel pipe scaffolding above the V-pier 10 is dismantled, the positioning steel bars 1 that are higher than the wing plate 5 can be directly cut off, and anti-rust measures are taken for the cut steel bars. The steel bars located in the structural layer of the wing plate 5 can be left untreated and remain in the wing plate 5 as structural steel bars.

[0051] The above describes in detail the preferred specific embodiments of the present invention. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A method for positioning and reinforcing a steel pipe support on a slope surface of a V-shaped bridge pier, characterized in that: The following steps are involved: S1: Construction of pile foundation (12), cap (11) and V-shaped pier (10); S2: erection of brackets on both sides of the V-shaped pier (10); The brackets on both sides of the V-shaped pier column include a plurality of vertical poles (3), a plurality of longitudinal steel pipes (4) and a transverse steel pipe (2), wherein the vertical poles (3), the longitudinal steel pipes (4) and the transverse steel pipe (2) are vertically connected to each other, a steel plate (6) is provided at the bottom of the vertical poles (3), and the plurality of vertical poles (3) are fixedly connected to the steel plate (6); S3: Tie the steel bars of the wing plates (5) on both sides of the V-shaped pier column (10), position them and embed the positioning steel bars (1); A plurality of positioning steel bars (1) are embedded in the wing plates (5) on both sides of the V-shaped pier column (10), one end of the positioning steel bar (1) is embedded in the wing plate (5), and the other end of the positioning steel bar (1) should be 5-10 cm higher than the surface of the wing plate (5); S4: pouring wing plate concrete (153) on the wing plates (5) on both sides of the V-shaped pier column (10); The wing plate concrete (153) of the two side wing plates (5) is poured symmetrically on both sides, from the bottom of the wing plate (5) to the upper part; S5: laying of mesh reinforcement mesh; The mesh steel mesh is laid on the top of the slope surface of the wing plate (5), the mesh steel mesh comprises transverse steel bars (21) and longitudinal steel bars (41), the transverse steel bars (21) and longitudinal steel bars (41) are laid perpendicularly to each other to form a mesh structure, the transverse steel bars (21) and the positioning steel bars (1) form an angle of 90 degrees, and the transverse steel bars (21), the longitudinal steel bars (41) and the positioning steel bars (1) are connected by welding; S6: Installation and reinforcement of scaffolding above the wing plates on both sides of the V-pier column; The scaffolding comprises a plurality of vertical poles (3), a transverse steel pipe (2) and a longitudinal steel pipe (4), wherein the vertical pole (3) is sleeved on one end of a positioning steel bar (1), the vertical pole (3), the transverse steel pipe (2) and the longitudinal steel pipe (4) are vertically connected to each other, and the scaffolding is welded to the gridded steel mesh in S5, and the welding direction is vertical; S7: bridge span structure (14) pouring bridge span structure concrete (154); The bridge span structure (14) is poured with the bridge span structure concrete (154) in a manner of symmetrically pouring from both sides toward the middle simultaneously and continuously; S8: Remove the bracket and support system; The order of removing the brackets is to first remove the steel pipe brackets above the wing plate (5), and then remove the brackets below the wing plate (5) and the arch ring.

2. A method for positioning and reinforcing a steel pipe support on a sloped surface of a V-shaped bridge pier according to claim 1, characterized in that: A drainage well (7) is provided below the steel plate (6), and the drainage well is arranged on the left and right sides of the bridge. A drainage pump (8) is provided in the drainage well (7).

3. A method for positioning and reinforcing a steel pipe support on a sloped surface of a V-shaped bridge pier according to claim 2, characterized in that: A plurality of drainage pipes (16) are also arranged below the steel plate (6), and the drainage pipes (16) are arranged in the middle of the bridge.

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