Construction method of tube-jet combined pile supporting underground wall structure

Abstract

The invention discloses a tube-jet combined pile supporting underground wall structure and a construction method for the tube-jet combined pile supporting underground wall structure. The underground wall structure comprises prestressed pipe piles pressed in soil at intervals, wherein the prestressed pipe piles are encircled along the periphery of a to-be-constructed basement; a high-pressure rotary-jet cement-soil pile is closely arranged between every two adjacent prestressed pipe piles in parallel, so as to form a combined pile; earthwork is segmentally excavated from top to bottom, and a reinforced concrete basement annular wall body is segmentally poured at the inner side of the combined pile from top to bottom; the upper layer of the annular wall body is connected with the lower layer of the annular wall body by means of instant grouting, so that a basement continuous wall is formed by each layer of the annular wall body; and an attached wall column can be arranged in the annular wall body, anchor lacing bars or pile hoops are arranged on the prestressed pipe piles at intervals along the length direction, the anchor lacing bars or the pile hoops are connected with the lacing fasteners of the basement continuous wall, so that the basement continuous wall and the prestressed pipe piles form a waterproof integer. The underground wall structure is simple, convenient and reliable to construct, capable of saving temporary supporting expense, free from adverse influence on environment, free of earthwork backfilling, and short in construction period.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for supporting an underground wall structure with pipe-spray combined piles, which can be used for temporary or permanent underground supporting structures supported in various forms. Background technique [0002] In the soft soil underground structure, the excavation of earthwork needs to be provided with support facilities in advance, and the underground structure also needs to be provided with surrounding protection structures. The support facilities for earthwork excavation are independent temporary support bodies, whose purpose is to ensure the stability of the surrounding soil and construction safety during the construction of underground structures. Therefore, the requirements for support facilities are high, but they are discarded after the completion of underground works, which not only wastes manpower and financial resources, but also...

AI Technical Summary

Problems solved by technology

Therefore, the requirements for support facilities are high, but they are discarded after the completion of the underground project, which not only wastes manpower and financial resources, but also easily causes pollution and other hazards to the environment.

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