Frame type double-row-pile cement-soil wall foundation pit enclosure structure and construction method thereof

Abstract

The invention provides a frame type double-row-pile cement-soil wall foundation pit enclosure structure which is arranged in a soil body around a foundation pit. The frame type double-row-pile cement-soil wall foundation pit enclosure structure comprises a group of frame type double-row-pile units and a cement-soil mixed pile waterproof curtain. The cement-soil mixed pile waterproof curtain is arranged along the edge of the foundation pit, and an interval exists between the edge of the foundation pit and the cement-soil mixed pile waterproof curtain. The cement-soil mixed pile waterproof curtain is composed of a group of cement-soil mixed piles, wherein every two adjacent cement-soil piles are meshed. The group of frame type double-row-pile units are arranged at intervals along the edge ofthe foundation pit in parallel. Each frame type double-row-pile unit comprises a front single-arm steel pipe pile, a back single-arm steel pipe pile and horizontal connection plates, wherein the front single-arm steel pipe pile is inserted into the soil body around the foundation pit and located on the side close to the foundation pit, and the back single-arm steel pipe pile is inserted into thecement-soil mixed pile waterproof curtain. The frame type double-row-pile cement-soil wall foundation pit enclosure structure solves the technical problems that construction of a traditional concreteenclosure structure is not environmentally friendly, and materials are wasted and solves the technical problems that a profile steel or steel sheet pile enclosure structure is low in flexural rigidity, and support deformation cannot be effectively controlled.

Description

technical field [0001] The invention relates to the field of foundations, in particular to a frame-type double-row pile cement-soil wall foundation pit enclosure structure and a construction method thereof. Background technique [0002] At present, the enclosure structure of deep foundation pit can be divided into concrete enclosure structure and steel enclosure structure in terms of materials. Among them, the concrete enclosure structure includes support piles and underground diaphragm walls, etc.; the steel enclosure structure includes steel cement-soil walls formed by SMW construction methods, TRD construction methods, and CSM construction methods, as well as various forms of steel sheet piles. Although the existing concrete enclosure structure has the advantages of high rigidity and good deformation control, it has the disadvantages of environmental pollution by construction mud, non-recyclable temporary enclosure structure of foundation pit and waste of materials. Alth...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a frame-type double-row pile cement-soil wall foundation pit enclosure structure and its construction method, to solve the technical problems of the traditional concrete enclosure structure construction not being environmentally friendly and material waste and the section steel or steel sheet pile enclosure The structural bending stiffness is small and the technical problems that the support deformation cannot be effectively controlled

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