Foundation pit supporting structure and construction method thereof

Abstract

The invention relates to a foundation pit supporting structure which comprises a concrete pile and a top beam. The concrete pile is provided with a steel reinforcement cage which is provided with a first steel batten plate, a second steel batten plate, first shaped steel and second shaped steel, wherein the first shaped steel and the second shaped steel are fixedly arranged between two side ends of the first steel batten plate and the second steel batten plate respectively. The foundation pit supporting structure is reasonable in structure and simplifies traditional design. The invention further provides a construction method of the foundation pit supporting structure. Construction is made to be convenient, construction efficiency is ensured, vibration to circumferential underground pipelines by the construction of the foundation pit supporting structure can be effectively reduced, and safety of the underground pipelines is sufficiently guaranteed.

Description

technical field [0001] The present invention relates to a foundation pit support structure and its construction method, in particular to the foundation pit support structure and its construction, which are suitable for the construction of deep foundation pit enclosure structures close to important underground pipelines and require key protection for underground pipelines method. Background technique [0002] With the rapid development of urban rail transit construction across the country, more and more subway station foundation pit projects are constructed by open cut method. Most of the subway stations and entrances and exits are located in urban traffic arteries and prosperous areas, and the underground pipelines are dense and complicated. Pipeline relocation is often limited by factors such as space, pipeline function interruption, construction period, and construction cost. The foundation pit enclosure structure of the main body of the subway station and ancillary works...

AI Technical Summary

Problems solved by technology

The vibration of the surrounding underground pipelines is very large when the cast-in-situ pile is mechanically formed, and it may even cause various unexpected damages, resulting in immeasurable economic losses and social impacts

Concrete crown beam construction requires a relatively large construction space. For example, when the construction is close to the surrounding important underground pipelines, the safety protection distance required by the property rights unit is not enough, and the conditions are not available; secondly, the elevation of the reinforced concrete crown beam is lower than the ground. , there is a problem of chiseling in the later stage, and chiseling will also cause vibration and damage to the surrounding underground pipelines

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