Combined prefabricated retaining wall square pile foundation pit supporting structure and construction method thereof

Abstract

The invention discloses a combined prefabricated retaining wall square pile foundation pit supporting structure and a construction method thereof. A stirring pile, a prefabricated pile, a connecting steel component, an externally-hung steel component and micro-expansion concrete are constructed to form a water-stopping and soil-retaining integrated underground retaining wall, so that supporting stability is provided for a foundation pit, and the foundation pit can be quickly and safely excavated within the enclosure range of the underground retaining wall; and in addition, an externally-hung part of the externally-hung steel component is used for being externally hung on a lining wall of a basement, a fertilizer groove needed by the lining wall of the basement during conventional construction can be omitted, excavation and filling of the foundation pit are reduced, the using area of the basement is enlarged, lining wall embedded steel bars of the basement can be reduced or even omitted, the underground retaining wall can serve as a permanent structure and does not need to be disassembled, the underground retaining wall can also serve as an outer wall of the basement in the construction stage and the using stage, and the construction cost is remarkably reduced. The combined prefabricated retaining wall square pile foundation pit supporting structure and the construction method thereof have the advantages of being safe, short in construction period and low in construction cost.

Description

technical field [0001] The invention relates to foundation pit support, in particular to a combined prefabricated retaining wall square pile foundation pit support structure and a construction method thereof. Background technique [0002] The foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures adopted for the side wall of the foundation pit and the surrounding environment. In the conventional foundation pit support form, the vertical support components mainly include row pile support, ground connection wall, pipe pile, grading and engineering pile; the horizontal support components include concrete support, steel support, anchor cable 6 and soil nails. Wait. One or more support forms can be selected for a foundation pit support form. During foundation pit excavation, groundwater control is also a part of foundation pit support. ...

AI Technical Summary

Problems solved by technology

[0004] First, the foundation pit support is generally a temporary structure, and a certain distance needs to be withdrawn to meet the construction of the side wall of the basement 1, thus causing waste of land, reducing the area of ​​the basement 1, and increasing the excavation and filling costs of the fertilizer tank

[0005] Second, most of the existing foundation pit support construction is carried out on-site concrete pouring, which will cause many common problems of concrete pouring on site, and corresponding inspections need to be completed, thus causing waste of resources and delaying the construction period

[0006] Third, many city management regulations now specify that the horizontal components of foundation pit support are also prohibited from going out of the red line, resulting in serious restrictions on the use of anchor cables in foundation pits, and the support costs will be increased out of thin air after being adjusted to other support components

[0007] At present, the design and construction of foundation pit support are relatively extensive, and there are noise pollution and mud wastewater on site, which does not meet the high-quality development and environmental protection requirements advocated by our country.

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