Deep foundation pit supporting system and construction method: Fid-Bau Portal

Deep foundation pit supporting system and construction method

HU TIEYI / JIANG CHUANTONG / LIU YA / MEI JIANGTAO / CAI CHANGHONG / FAN JINFU

The deep foundation pit supporting system comprises an underground diaphragm wall, a plurality of transverse enclosing purlins are fixed to the inner side of the underground diaphragm wall in the vertical direction, and a vertical enclosing purlin is arranged between every two adjacent transverse enclosing purlins; the steel supports comprise support movable ends, three-way steel supports, horizontal steel supports and inclined steel supports, the steel support movable ends are fixed with the vertical enclosing purlins, each vertical enclosing purlin is connected with the two steel support movable ends, the inclined steel supports are connected with the steel support movable ends at the lower ends of the vertical enclosing purlins, and the horizontal steel supports are connected with the inclined steel supports at the lower ends of the vertical enclosing purlins. The three-way steel support is provided with three connecting ends, one horizontal connecting end is connected with the steel support movable end, one inclined connecting end is connected with the inclined steel support, and the other horizontal connecting end is connected with the horizontal steel support. And the influence on earthwork and structural operation is small, construction is convenient and fast, and the method is suitable for deep foundation pits of different sizes and high in applicability.

本发明公开一种深基坑支护体系及施工方法，包括地下连续墙，所述地下连续墙的内侧沿竖向固定有若干道横向围檩，相邻两道横向围檩之间设置有竖向围檩；还包括有钢支撑，所述钢支撑包括支撑活络端、三向钢支撑、水平钢支撑和斜向钢支撑，所述钢支撑活络端和竖向围檩固定，每个竖向围檩和两个钢支撑活络端连接，所述斜向钢支撑与竖向围檩下端的钢支撑活络端相连，所述三向钢支撑设有三个连接端，其中一个水平连接端与钢支撑活络端相连，一个斜向连接端与斜向钢支撑相连，另一个水平连接端与水平钢支撑相连，本发明简单实用，较传统深基坑支护耗钢量小，设置间距较大，对土方和结构作业影响较小，施工便捷，适用于不同尺寸的深基坑，适用性强。

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