Bridge flange plate construction formwork support system

Abstract

This invention discloses a formwork support system for bridge flange plate construction. It includes several support structures spaced at intervals along the longitudinal direction of the bridge. Each support structure comprises a column, a bracket, and a tie rod. The column is vertically fixed to the outer edge of the bridge, with its lower end extending downwards beyond the outer edge. The bracket is an H-beam, with one end fixedly connected to the end of the column extending downwards beyond the outer edge of the bridge, and the other end of the bracket cantilevered outwards from the bridge. One end of the tie rod is connected to the cantilevered end of the bracket, and the other end is fixedly connected to the upper end of the column. The column, bracket, and tie rod form a triangular frame. This invention enables rapid installation and dismantling of the support system and formwork, solves the problem of damage to the steel beam web caused by the triangular bracket, improves the efficiency of concrete formwork construction, and ensures construction safety and quality.

Description

Technical Field

[0001] This invention relates to a formwork support system for bridge flange plate construction, used for cast-in-place concrete construction of steel box girder flange plates, and belongs to the field of concrete formwork construction technology. Background Technology

[0002] Steel-concrete composite beams possess excellent load-bearing performance and good overall economic benefits, with broad application prospects. Steel box girder-concrete composite beams are lightweight, have high structural strength, easily adjustable spans, and are quick, convenient, and economical to construct. Therefore, cast-in-place concrete for the flange plates of steel box girders is a common design feature of steel-concrete composite beams. Flange plate formwork engineering is one of the key processes in concrete construction, and currently, scaffolding or bracket support systems are commonly used. Using scaffolding support systems involves high material costs for full-span scaffolding and steel pipe columns, long construction periods, and significant safety risks during erection and dismantling. Using bracket support systems requires pre-welding connectors to the side webs of the steel box girder for the triangular brackets. Removing these connectors after construction damages the steel box girder, while retaining them affects aesthetics. Furthermore, the installation and dismantling of the entire triangular bracket system involves high-altitude operations, which are cumbersome and pose significant safety risks. Moreover, it is not easy to drill holes in the web of a steel box girder. Drilling holes in the web will cause stress concentration at the hole location, which will lead to cracking. If it is directly welded to the web, the addition of a corbel will cause the web to be heated again, and it will also affect the appearance. It will also require grinding again and overall painting. Summary of the Invention

[0003] In view of the above-mentioned defects in the existing technology, the present invention provides a bridge flange plate construction formwork support system, which can realize the rapid installation and dismantling of the support system and formwork, improve the efficiency of concrete formwork construction, ensure construction safety, and avoid the problem of damage to the web of steel beams.

[0004] This invention is achieved through the following technical solution: a bridge flange plate construction formwork support system, comprising a plurality of support structures spaced apart along the longitudinal direction of the bridge, characterized in that: each support structure includes a column, a bracket, and a tie rod; the column is vertically fixed to the outer edge of the bridge and its lower end extends downward through the outer edge of the bridge; the bracket is an H-beam; one end of the bracket is fixedly connected to the end of the column extending downward through the outer edge of the bridge; the other end of the bracket cantilevered outwards from the bridge; one end of the tie rod is connected to the end of the cantilevered end of the bracket; the other end of the tie rod is fixedly connected to the upper end of the column; the column, bracket, and tie rod form a triangular frame.

[0005] In this invention, the columns, brackets, and tie rods form a stable triangular frame structure capable of bearing significant loads. Furthermore, the triangular frame is securely connected to the bridge, effectively ensuring construction safety. This invention eliminates the need for drilling holes in the bridge web during installation, thus avoiding damage to the bridge web structure and ensuring the quality of bridge construction. After the support system is installed, the bottom and side forms can be installed, reinforcement bars tied, and concrete poured.

[0006] Furthermore, for ease of disassembly, the lower end of the column is provided with external threads, and the bracket is detachably connected to the lower end of the column via a nut.

[0007] Furthermore, to improve the structural strength of the support system, the tie rod is made of round steel.

[0008] Furthermore, to improve the structural strength of the support system, the columns are made of Φ25 precision-rolled threaded steel, and the tie rods are made of Φ12 round steel.

[0009] The beneficial effects of this invention are: it is easy to install and dismantle, has high construction efficiency, and a short cycle of the formwork system, which can accelerate the construction progress and shorten the construction period; the formwork support system of this invention is relatively fixed, rigorously designed, rationally structured, and easy to operate, ensuring construction safety; using this invention for construction eliminates the need to drill holes in the web of the steel box girder, thus avoiding damage to the web of the steel box girder, solving the problem of damage to the web of the steel beam caused by the use of triangular brackets in the prior art, and does not affect the appearance of the bridge, ensuring stable construction quality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention in a specific embodiment;

[0011] In the diagram, 1 is the column, 2 is the bracket, 3 is the tie rod, 4 is the flange plate, and 5 is the steel box girder. Detailed Implementation

[0012] The invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0013] As shown in the attached diagram, a bridge flange plate construction formwork support system includes several support structures spaced at intervals along the longitudinal direction of the bridge. Each support structure includes a column 1, a bracket 2, and a tie rod 3. The column 1 is vertically fixed to the outer edge of a steel box girder 5, with its lower end extending downwards through the outer edge of the steel box girder 5 and located below the outer edge of the steel box girder 5. The bracket 2 is an H-beam, with one end fixedly connected to the end of the column 1 extending downwards through the outer edge of the steel box girder 5, and the other end of the bracket 2 cantilevered outwards from the steel box girder. One end of the tie rod 3 is fixedly connected to the end of the cantilevered end of the bracket 2, and the other end of the tie rod 3 is fixedly connected to the upper end of the column 1. The tie rod 3 is welded to both the end of the cantilevered end of the bracket 2 and the upper end of the column 1. The column 1, bracket 2, and tie rod 3 form a triangular frame structure after connection.

[0014] To improve the structural strength of the support system, Φ12 round steel is preferred for the tie rods, and Φ25 precision rolled threaded steel is preferred for the columns.

[0015] For ease of installation and disassembly, the lower end of the column 1 is provided with external threads, and the bracket 2 is provided with bolt holes. The bracket 2 and the lower end of the column 1 are detachably connected by nuts.

[0016] During installation, after the steel box girder is in place, the aforementioned support structure is installed longitudinally along the bridge according to design requirements. The longitudinal spacing of the brackets is 1m. After the support system is installed, the bottom formwork and side formwork can be installed on the support system, the reinforcing bars can be tied, and concrete can be poured to complete the construction of the bridge flange plate 4. After construction is completed, the present invention can be dismantled.

[0017] This invention enables rapid installation and dismantling of the support system and formwork, solving the problem of damage to the steel beam web caused by using triangular brackets as supports in existing technologies. It improves the efficiency of concrete formwork construction and ensures construction safety and quality. This invention is particularly suitable for the construction of concrete flanges in steel-concrete composite beams.

[0018] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A formwork support system for the flange plate of a steel box girder-concrete composite bridge, comprising a plurality of support structures spaced apart along the longitudinal direction of the bridge, characterized in that: Each of the aforementioned support structures includes a column (1), a bracket (2), and a tie rod (3). The column (1) is vertically fixed to the outer edge of the bridge and its lower end extends downward through the outer edge of the bridge. The bracket (2) is an H-beam. One end of the bracket (2) is fixedly connected to the end of the column (1) extending downward through the outer edge of the bridge, and the other end of the bracket (2) cantilevered outward from the bridge. One end of the tie rod (3) is connected to the end of the cantilevered end of the bracket (2), and the other end of the tie rod (3) is fixedly connected to the upper end of the column (1). The column (1), bracket (2), and tie rod (3) form a triangular frame. The lower end of the column (1) is provided with an external thread, and the bracket (2) is detachably connected to the lower end of the column (1) by a nut; The column (1) is made of Φ25 precision rolled threaded steel, and the tie rod (3) is made of Φ12 round steel; The tie rod (3) and the cantilever ends of the bracket (2) and the upper end of the column (1) are all connected by welding.

Images