Super deep foundation pit support structure and construction method thereof

Abstract

The invention relates to a super deep foundation pit support structure and a construction method thereof. The structure comprises a first fence, a second fence and a connecting part; the first fence comprises a first concrete wall and multiple pieces of first section steel, the multiple pieces of first section steel are uniformly inserted into the first concrete wall and fixedly connected into a whole, and the upper portions of the multiple pieces of first section steel are exposed out of the first concrete wall; the second fence comprises a second concrete wall and multiple second pieces of second section steel, and the multiple pieces of second section steel are uniformly inserted into the second concrete wall and fixedly connected into a whole, and the upper portions of the multiple pieces of second section steel are exposed out of the second concrete wall; the connecting part is used for connecting the first fence with the second fence and comprises a connecting piece, a connectinglayer and connecting soil nails. All components in the connecting part are connected into a whole, the immediate dilapidation problem is effectively solved, the structure is especially suitable for super deep foundation pit support, the excavation area is greatly decreased compared with unprotected open cut excavation, and backfill earthwork is greatly reduced.

Description

technical field [0001] The invention relates to the field of ultra-deep foundation pit construction, in particular to an ultra-deep foundation pit support structure and a construction method thereof. Background technique [0002] The foundation pit project refers to the excavation of the foundation pit, dewatering and enclosure of the pit wall during the construction of the underground part of the building. At the same time, it is necessary to inspect and maintain the surrounding buildings (structures), roads and underground pipelines to ensure that the entire process normal and safe construction. With the rapid development of urban economy and construction, the available building space has become smaller and smaller. It is often necessary to excavate deep foundation pits on narrow sites. There is no grading space around, and the excavation depth is constant. Deepening, support measures must be taken to ensure the safe construction of the foundation pit. [0003] With the ...

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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides an ultra-deep foundation pit supporting structure and its construction method. By adopting a new structure, the problem that the ultra-deep foundation pit is easy to collapse can be effectively solved

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