CN111519544A

CN111519544A - Bridge flange plate construction formwork support system

Info

Publication number: CN111519544A
Application number: CN202010434785.9A
Authority: CN
Inventors: 常春章; 华敬华; 陶云雷; 杨保全; 张海霞; 曾来仕
Original assignee: China Railway No 10 Engineering Group Co Ltd
Current assignee: China Railway No 10 Engineering Group Co Ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-11

Abstract

The invention discloses a bridge flange plate construction formwork supporting system. It includes a plurality of bearing structure along the vertical interval setting of bridge, characterized by: every bearing structure includes stand, bracket and lacing wire, the stand is vertical to be fixed at the bridge outer fringe and its lower extreme wears out the bridge outer fringe downwards, the bracket is H shaped steel, the one end of bracket with the stand wears out bridge outer fringe end fixed connection downwards, the other end of bracket is encorbelmented to the bridge outside, wherein one end of lacing wire with the end-to-end connection of the end of encorbelmenting of bracket, the other end of lacing wire with the upper end fixed connection of stand, bracket, lacing wire form the tripod. The invention can realize the quick mounting and dismounting of the support system and the template, solves the problem that the triangular bracket damages a steel beam web, improves the construction efficiency of the concrete template, and ensures the construction safety and the construction quality.

Description

Bridge flange plate construction formwork support system

Technical Field

The invention relates to a bridge flange plate construction template supporting system, which is used for cast-in-place concrete construction of a steel box girder flange plate and belongs to the technical field of concrete template construction.

Background

The steel-concrete composite beam has good stress performance and better comprehensive economic benefit, has wide application prospect, light weight, large structural strength, easy span adjustment, quick and convenient construction, economy and applicability, so the cast-in-place concrete of the steel box beam flange plate is a common design point of the common steel-concrete composite beam. The flange plate formwork engineering is one of the key processes of concrete construction, and at present, a support or bracket support system is mostly adopted. When the support system is adopted, the cost of materials of full-scale supports and steel pipe columns is high, the construction period is long, and the safety risk of erection and dismantling is high; when the bracket supporting system is adopted, the triangular bracket needs to weld the connecting piece on the web plate on the side surface of the steel box girder in advance, the steel box girder is damaged if the connecting piece is removed after construction is finished, the appearance is influenced if the connecting piece is not removed, the whole triangular bracket is installed and removed in a high-altitude mode, and the triangular bracket is complex and has high safety risk. And steel box girder web is difficult for punching, and the web punches and can arouse hole site stress concentration, can lead to the fracture, if the beading on the web, add and weld the bracket and can make the web secondary be heated, influence the outward appearance moreover, still need polish once more to and whole spraying paint etc..

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a bridge flange plate construction formwork support system, which can realize the quick mounting and dismounting of the support system and a formwork, improve the construction efficiency of a concrete formwork, realize the construction safety and avoid the problem of damaging a steel girder web plate.

The invention is realized by the following technical scheme: the utility model provides a bridge flange plate construction formwork support system, includes a plurality of bearing structure, characterized by that along the vertical interval setting of bridge: every bearing structure includes stand, bracket and lacing wire, the stand is vertical to be fixed at the bridge outer fringe and its lower extreme wears out the bridge outer fringe downwards, the bracket is H shaped steel, the one end of bracket with the stand wears out bridge outer fringe end fixed connection downwards, the other end of bracket is encorbelmented to the bridge outside, wherein one end of lacing wire with the end-to-end connection of the end of encorbelmenting of bracket, the other end of lacing wire with the upper end fixed connection of stand, bracket, lacing wire form the tripod.

According to the invention, the upright post, the bracket and the tie bar can form a stable tripod structure and can bear larger load, and the tripod formed by the upright post, the bracket and the tie bar can be stably connected with the bridge, so that the construction safety can be effectively ensured. The invention does not need to punch holes at the position of the bridge web during installation, does not damage the structure of the bridge web and does not influence the construction quality of the bridge. After the support system is installed, a bottom die and a side die can be installed on the support system, steel bars are bound, and concrete is poured.

Further, in order to facilitate disassembly, the lower end of the upright post is provided with an external thread, and the bracket is detachably connected with the lower end of the upright post through a nut.

Furthermore, in order to improve the structural strength of the support system, the lacing wire is made of round steel.

Furthermore, in order to improve the structural strength of the support system, the upright column is phi 25 finish-rolled deformed steel bar, and the lacing wire is phi 12 round steel.

The invention has the beneficial effects that: the invention has convenient assembly and disassembly, high construction efficiency and short cycle of the template system, can accelerate the construction progress and shorten the construction period; the formwork support system is relatively fixed, the design is precise, the structure is reasonable, the operation is simple, and the construction safety is guaranteed; by utilizing the method, the steel box girder web is not required to be punched during construction, the steel box girder web is not damaged, the problem that the steel box girder web is damaged by adopting the triangular bracket in the prior art is solved, the appearance of the bridge is not influenced, and the construction quality is stable.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention in a specific embodiment;

in the figure, 1, upright posts, 2, brackets, 3, tie bars, 4, flange plates, 5 and steel box girders.

Detailed Description

The invention will now be further illustrated by way of non-limiting examples in conjunction with the accompanying drawings:

as shown in the attached drawings, the bridge flange plate construction formwork support system comprises a plurality of support structures which are arranged along the longitudinal direction of a bridge at intervals, and each support structure comprises an upright post 1, a bracket 2 and a tie bar 3. The upright posts 1 are vertically fixed on the outer edge of the steel box girder 5, and the lower ends of the upright posts penetrate through the outer edge of the steel box girder 5 downwards and are positioned on the lower part of the outer edge of the steel box girder 5. Bracket 2 is H shaped steel, bracket 2's one end with stand 1 is worn out 5 outer fringe end fixed connection of steel box girder downwards, bracket 2's the other end is encorbelmented to the steel box girder outside. One end of the lacing wire 3 is fixedly connected with the tail end of the cantilever end of the bracket 2, and the other end of the lacing wire 3 is fixedly connected with the upper end of the upright post 1. The tie bar 3 is connected with the tail end of the overhanging end of the bracket 2 and the upper end of the upright post 1 by welding. The upright post 1, the bracket 2 and the lacing wire 3 are connected to form a tripod structure.

In order to improve the structural strength of the support system, the preferred lacing wire adopts phi 12 round steel, and the upright post is phi 25 finish-rolled deformed steel.

In order to facilitate installation and disassembly, the lower end of the upright post 1 is provided with external threads, the bracket 2 is provided with bolt holes, and the bracket 2 is detachably connected with the lower end of the upright post 1 through nuts.

When the steel box girder supporting structure is installed, the steel box girder is installed in place, and then the supporting structure is installed along the longitudinal direction of a bridge according to design requirements. The longitudinal spacing of the brackets was 1 m. After the supporting system is installed, a bottom die and a side die can be installed on the supporting system, reinforcing steel bars are bound, concrete is poured, and the construction of the bridge flange plate 4 is completed. After the construction is finished, the invention can be dismantled.

The invention can realize the quick assembly and disassembly of the supporting system and the template, solves the problem that the steel beam web is damaged when the triangular bracket is used as the support in the prior art, improves the construction efficiency of the concrete template, and ensures the construction safety and the construction quality. The invention is particularly suitable for the construction of the concrete flange plate of the steel-concrete composite beam.

Other parts in this embodiment are the prior art, and are not described herein again.

Claims

1. The utility model provides a bridge flange plate construction formwork support system, includes a plurality of bearing structure, characterized by that along the vertical interval setting of bridge: every bearing structure includes stand (1), bracket (2) and lacing wire (3), stand (1) is vertical to be fixed at the bridge outer fringe and its lower extreme wears out the bridge outer fringe downwards, bracket (2) are H shaped steel, the one end of bracket (2) with stand (1) wears out bridge outer fringe end fixed connection downwards, the other end of bracket (2) is encorbelmented to the bridge outside, wherein one end of lacing wire (3) with the end-to-end connection of the end of encorbelmenting of bracket (2), the other end of lacing wire (3) with the upper end fixed connection of stand (1), bracket (2), lacing wire (3) form the tripod.

2. The bridge flange plate construction formwork support system of claim 1, wherein: the lower end of the upright post (1) is provided with an external thread, and the bracket (2) is detachably connected with the lower end of the upright post (1) through a nut.

3. The bridge flange plate construction formwork support system of claim 1, wherein: the lacing wire (3) is round steel.

4. The bridge flange plate construction formwork support system of claim 1, 2 or 3, wherein: the upright post (1) is phi 25 finish-rolled deformed steel bar, and the lacing wire (3) is phi 12 round steel bar.