Novel foundation pit supporting system and construction method

Abstract

The invention provides a novel foundation pit supporting system and a construction method. A plurality of linearly arranged steel pipe piles are vertically arranged at the bottom of a foundation pit; beam crowns are arranged at the tops of the steel pipe piles, and reinforced concrete cover plates are arranged between the beam crowns; concrete waist beams and section steel waist beams are welded to the steel pipe piles correspondingly; the concrete waist beams are located above the section steel waist beams; pre-stressed anchor rods are arranged on the concrete waist beams and the section steel waist beams in a driving mode; common anchor rods are located below the pre-stressed anchor rods and connected with the steel pipe piles; reinforced concrete inner supports are arranged between the concrete waist beams; and section steel inner supports are arranged between the section steel waist beams. The problems of deformation of the foundation pit and surrounding ground surface settlement can be reduced, and the safety performance of the foundation pit is improved; and the supporting system has the advantages of being simple in structural form and construction method process, reasonable in stress, convenient and fast to construct and the like, safety of surrounding houses and smoothness of site construction organization can be guaranteed, and the construction risk is relatively low.

Description

technical field [0001] The invention belongs to the technical field of subways and civil construction projects, and in particular relates to a novel foundation pit support system and a construction method. Background technique [0002] With the development of social economy and technology and the improvement of people's living standards, more and more subways and civil buildings are being built. However, due to the increasing utilization of space in many cities, many projects are located in densely built urban areas with complex surrounding houses and environments, and the distance between foundation pits and surrounding buildings is getting closer and closer. In order to ensure the safety of foundation pit excavation, The invention is a novel foundation pit support design system combining an anchor cable and an internal support system. [0003] At present, the use of enclosure structures has its own adaptability, but due to the complex surrounding environment, it may be di...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of large foundation pit deformation and difficulty in controlling house settlement and cracking when excavating foundation pit support in densely populated surrounding areas, the invention provides a new type of foundation pit support system and construction method, which is a A new support design concept can reduce the deformation of the foundation pit itself and the surrounding surface settlement, and improve the safety performance of the foundation pit; the support system has the advantages of simple structure and construction method, reasonable force, convenient and fast construction, etc. Features, can ensure the safety of surrounding houses, smooth on-site construction organization, and low construction risk

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