Supporting base of fishbelly girder purlin

Abstract

The invention discloses a supporting base of a fish belly sill surrounding purlin. The supporting base comprises wide-flange H-shaped steel with the length of 100-150mm. The lower end of the H-shaped steel is welded to a square bottom plate which is provided with four flange holes. The four flange holes are distributed at four corners in a square shape. The side length of the square is 200mm. The diameter of each flange hole is 28mm. The upper end of the H-shaped steel is welded to a square connecting plate. Reinforcing plates are arranged in grooves in the two sides of the H-shaped steel. Three guiding plates are perpendicular to the square connecting plate and correspond to the reinforcing plates and wing plates on the two sides of the H-shaped steel respectively in an up-down mode. Two arch-shaped plates are arranged between the three guiding plates. The two arch-shaped sides of the arch-shaped plates are fixedly welded to the guiding plates on the two sides respectively. The two bottom sides of each arch-shaped plate are fixedly welded to the square connecting plate. A limiting inserting hole for a limiting blocking rod to be inserted in is formed in each of the two sides, above each arch-shaped plate, of each guiding plate. According to the technical scheme, assembling and disassembling are convenient, multi-time repeated using can be achieved, and the purpose that construction cost is saved, and construction is convenient is achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a support base for a fish-belly girder purlin in an internal support system for foundation pit support. Background technique [0002] In soft soil deep foundation pit engineering, reinforced concrete or steel pipe supports the support structure. In order to reduce the deformation of the foundation pit and increase the stability, the commonly used methods are: increase the size of the reinforced concrete purlin street surface, increase the number of steel pipe supports, Reduce spacing etc. But this will greatly increase the consumption of building materials and also reduce the effective construction space in the foundation pit. Since the steel support structure currently used mainly uses a single section steel or steel pipe as a support beam, there is no effective connection between each section steel or steel pipe, and it cannot work as a composite structure, so their ...

AI Technical Summary

Problems solved by technology

Since the steel support structure currently used mainly uses a single section steel or steel pipe as a support beam, there is no effective connection between each section steel or steel pipe, and it cannot work as a composite structure, so their support stiffness is relatively low. The force it can withstand is relatively limited. For foundation pits with large spans, it is difficult to control their deformation with the current steel support support

Because many of these supports are made according to the requirements of on-site construction, there is no standardized connection size, and the purpose of interchangeability and universal use between various parts cannot be achieved. After the foundation pit construction is completed, most of the support parts have become disposable consumables. , cannot be reused

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