Deep foundation pit underground space structure and construction method thereof

Abstract

The invention relates to a deep foundation pit underground space structure. The deep foundation pit underground space structure comprises a foundation pit which is in the shape of a barrel, a plurality of pile bodies which are annularly arranged along the pit wall of the foundation pit and are mutually engaged with one another to form a retaining wall which is closed in the peripheral direction, and an inner supporting structure which is annularly arranged along the inner wall of the retaining wall and supports the retaining wall from the interior of the foundation pit to soil, and the bottom ends of the pile bodies are supported on the bottom face of the foundation pit. Due to the adoption of the design, the pile bodies only serve as media of retaining bodies, the pile bodies do not generate reactive force by means of soil anchored below the bottom face of the foundation pit to absorb the side pressure applied to the pile bodies by soil on the periphery of piles, the side pressure is transmitted to inner supporting ring beams, the inner supporting structure bears more side pressure, and the effect of 'strong supporting and weak piles' is achieved. By additionally arranging the inner supporting ring beams to absorb the side pressure of the soil, needed materials are far less than material needed when the pile bodies are inserted into the foundation part.

Description

technical field [0001] The invention relates to a foundation pit support structure and a construction method, in particular to an underground space structure of a deep foundation pit and a construction method thereof. Background technique [0002] At present, with the development of society, urban land resources are becoming more and more scarce. When the buildings above the ground cannot meet people's needs, it will lead to more and more demands for the use of underground space. The current underground space wants to expand the utilization rate. It can only expand its own area horizontally, or increase the depth of underground space vertically. In modern cities, it is obviously impossible to expand the area of ​​underground space horizontally, and it will affect other urban buildings, which makes it difficult to increase the depth of underground space vertically. Depth has been paid more and more attention by architects. At present, most of the deep foundation pits are des...

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, the retaining wall structure in which the pile body is inserted below the soil at the bottom of the foundation pit is a retaining wall structure with many consumables and high cost.

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