Fish-belly beam components of the inner support system of foundation pit support

Abstract

The invention discloses a fish belly sill part of a foundation pit support inner supporting system. The fish belly sill part comprises a lower chord beam part made of H-type steel, a belly rod part and inclined supporting parts. The two ends of the lower chord beam part are fixedly and respectively provided with a square flange plate, reinforcing plates, lug plates and drainage holes are formed in grooves in the two sides of the lower chord beam part, and a plurality of connecting holes are formed in an outer wing plate. The two ends of the belly rod part are respectively provided with a square flange plate in a welded mode, one end of the belly rod part is connected with an inner wing plate of the lower chord beam part through a bolt, and reinforcing plates and drainage holes are formed in grooves in the two sides of the belly rod part. Two end faces of each inclined supporting part are 45-degree inclined faces and are connected with rectangular flange plates in a welded mode, one end of each inclined supporting part is connected with the belly rod part through a bolt, the other end of each inclined supporting part is connected with the lower chord beam part through a bolt, lug plates and drainage holes are formed in grooves in the two sides of each inclined supporting part, and the two inclined supporting parts are symmetrically arranged on the two sides of the belly rod part respectively. The lower chord beam part, the belly rod part and the belly plates made of H-type steel of the inclined supporting parts are located in the same plane. According to the technical scheme, the fish belly sill part is convenient to assemble and disassemble and can be used repeatedly, and the aims of saving construction cost and facilitating construction are achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a fish-belly beam component of 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 support stiffness ...

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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