Structure for shoring of foundation trench and construction method

Abstract

The invention discloses a structure for shoring of a foundation trench and a construction method. The foundation trench needing shoring construction is composed of a middle foundation trench body and two side foundation trench bodies on the two sides of the middle foundation trench body. The construction method comprises the following steps that firstly, earthwork of the foundation trench is excavated to a foundation bottom elevation position of the middle foundation trench body; secondly, foundation piles of the middle foundation trench body and support piles of the two side foundation trench bodies on the periphery of the middle foundation trench body are constructed; thirdly, structural bottom plates of the middle foundation trench body are constructed at the foundation bottom elevation position of the middle foundation trench body; fourthly, earthwork of the two side foundation trench bodies is excavated to a position where a counter-pulled anchor with prestress is arranged, and a counter-pulled anchor with prestress is constructed between the two side foundation trench bodies at the position; and fifthly, the fourth step is executed repeatedly, the earthwork of the two side foundation trench bodies is excavated from top to bottom, counter-pulled anchors with prestress are sequentially constructed until foundation bottom elevation positions of the two side foundation trench bodies are reached.

Description

technical field [0001] The invention relates to a foundation pit support structure and a construction method, in particular to a foundation pit support structure and a construction method in the field of construction engineering. Background technique [0002] Due to the rapid development of modern construction technology, more and more construction projects have appeared. Especially in developed cities, the construction land is very tight, which leads to the smaller and smaller spacing of foundation pits for construction projects. However, because the distance between the foundation pits of adjacent buildings is too small, the foundation pit support of the building constructed later will have an impact on the structure of the already constructed building; The cost of foundation pit support needs to be designed without support, but the foundation pits of adjacent buildings cross each other, which has a great impact on the overall construction progress of the construction proj...

AI Technical Summary

Problems solved by technology

However, this support design requires vertical support systems to be installed on the foundation pits 20 on both sides, which greatly increases the vertical support 61 and prestressed anchor cables 62, and this design method causes the foundation pits 20 on both sides to be backfilled. Construction of middle foundation pit 10 buildings

[0005] Because the current support design of this kind of foundation pit still uses the traditional construction method, a large amount of earthwork is excavated and then backfilled during the construction process, resulting in a long construction period; in addition, the large increase in vertical support and prestressed anchor cables not only increases the construction cost. The cost also increases the workload of the construction, and of course the construction period is extended.

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