Shaft type underground garage foundation pit supporting system in water-rich stratum and construction method: Fid-Bau Portal

Shaft type underground garage foundation pit supporting system in water-rich stratum and construction method

LI YING / TONG XING / ZHANG JINHONG / CHEN DONG / LIU XINGWANG

The invention discloses a shaft type underground garage foundation pit supporting system in a water-rich stratum and a construction method. The shaft type underground garage foundation pit supportingsystem in the water-rich stratum and the construction method can meet the construction requirement of a shaft type underground garage in the water-rich stratum and avoid underground water seepage damage, and the foundation pit supporting structure is stable and reliable. The shaft type underground garage foundation pit supporting system in the water-rich stratum comprises an annular outer-layer anti-seepage wall, an annular inner-layer retaining wall and a garage lining wall, wherein the outer-layer anti-seepage wall is composed of underground cement soil continuous walls, the inner-layer retaining wall is located on the inner side of the outer-layer anti-seepage wall, and the inner-layer retaining wall is composed of reinforced concrete underground continuous walls, and the garage liningwall is located on the inner side of the inner-layer retaining wall, the garage lining wall is constructed in the downward excavation process of a basement of the shaft type underground garage, and the garage lining wall is tightly attached to the inner-layer retaining wall.

本发明公开了一种富水地层中的井筒式地下车库基坑支护系统及施工方法，旨在提供一种不仅能满足富水地层中的井筒式地下车库的施工要求，避免地下水渗透破坏；而且基坑支护结构稳定可靠的富水地层中的井筒式地下车库基坑支护系统及施工方法。富水地层中的井筒式地下车库基坑支护系统包括：外层防渗墙，外层防渗墙呈环形，外层防渗墙由地下水泥土连续墙组成；内层围护墙，内层围护墙呈环形，且内层围护墙位于外层防渗墙的内侧，内层围护墙由钢筋混凝土地下连续墙组成；车库内衬墙，车库内衬墙位于内层围护墙的内侧，车库内衬墙在井筒式地下车库的地下室向下挖掘的过程中施工，车库内衬墙紧贴内层围护墙。

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