A self-falling box girder steel pipe Bailey door opening bracket and its supporting method

Abstract

The invention discloses a self-dropping type box girder steel pipe bailey door opening bracket and a supporting method thereof. The bracket comprises a reinforced concrete foundation (1), wherein a plurality of steel buttress piers (2) are arranged on the reinforced concrete foundation (1) and are connected with the reinforced concrete foundation (1) through sand boxes (3); bailey truss components (4) are arranged on the steel buttress piers (2); the steel buttress piers (2) and the bailey truss components (4) are combined to form a bailey door opening. Due to the fact that the structure of the bracket is toolized and modularized and the self-dropping characteristic of the sand boxes is applied, a casting box girder bracket can be assembled and disassembled within about 7 days, and the construction speed is increased; due to the adoption of the technology that the whole sand boxes fall into a die, the workload of work high above the ground for de-molding the bracket is reduced by over 90 percent, and the safety of construction is greatly improved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering construction, in particular to a self-falling box girder steel pipe Bailey door support. Background technique [0002] In the construction of municipal bridge projects, cast-in-situ box girder steel pipe Bailey door support is more and more widely used because of its advantages of convenient installation and disassembly, easy quality and safety control, and saving construction land. [0003] At present, in the supporting system of the steel pipe Bailey door opening, in order to adjust the elevation of the bottom formwork of the box girder and facilitate the removal of the formwork, it is often used to add a full support above the Bailey main girder, or to set up two or even three floors above the Bailey main girder. Layer wooden squares to achieve the purpose of adjusting the height of the bottom mold. However, if the plan of adding a full hall support above the main girder of Bailey i...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a self-falling box girder steel pipe Bailey door opening bracket and its supporting method to solve the problems of high disassembly and assembly risk coefficient, high structural safety risk, high engineering cost and long construction period of the existing steel pipe Bailey door opening support. technical problem

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