Integral supporting device for deep foundation pit and supporting method thereof: Fid-Bau Portal

Integral supporting device for deep foundation pit and supporting method thereof

LIANG ZHANYUAN / ZHOU YUE

The invention provides an integral supporting device for a deep foundation pit and a supporting method thereof. The device comprises an enclosing purlin, a structural bottom plate, reinforced concretesupporting columns and opposite supports, wherein the U-shaped enclosing purlin is additionally arranged at the position, in a pit, of the reinforced concrete supporting columns on the outer side ofthe deep foundation pit; and the enclosing purlin and the reinforced concrete supporting columns of the foundation pit are connected in a bar planting mode; top steel bars of the reinforced concrete supporting columns are anchored into the structural bottom plate, so that the structural bottom plate and the reinforced concrete supporting columns are fixedly connected; and opposite support steel bars are anchored into the structural bottom plate. The local support and bottom plate connecting mode can reduce the influence of a temporary structure on a permanent structure in the construction process, and the exposure time of the foundation pit can be shortened while the safety of the foundation pit is guaranteed.

本发明提供了一种深基坑整体支撑装置及其支撑方法，包括围檩、结构底板、钢筋混凝土支护柱、对撑；深基坑外侧钢筋混凝土支护柱在坑中坑部位增加一道U型围檩，围檩与基坑钢筋混凝土支护柱采用植筋连接方式；钢筋混凝土支护柱顶钢筋锚入结构底板，使结构底板与钢筋混凝土支护柱固定连接；对撑钢筋锚入结构底板。局部支撑与底板连接方式在施工过程中不仅能够减少临时结构对永久结构的影响，还能在保证基坑安全的同时减少基坑暴露时间。

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