Foundation pit supporting device and supporting method thereof: Fid-Bau Portal

Foundation pit supporting device and supporting method thereof

WANG JIANCHENG / MING YAN / PAN RONGSHENG / LI ZHIZHONG / ZONG GUOYING

The invention discloses a foundation pit supporting device and a supporting method thereof, and relates to the technical field of foundation pit supporting, the foundation pit supporting device comprises an inner supporting plate and an outer supporting plate, an expansion supporting piece is arranged between the inner supporting plate and the outer supporting plate, and the inner supporting plate and the outer supporting plate are oppositely arranged at the bottom of a slope in a foundation pit; the expanding pieces are connected with the opposite side walls of the inner supporting plate and the outer supporting plate to form a double-layer soil retaining frame, the expanding pieces support the outer supporting plate to be obliquely adjusted towards the side away from the inner supporting plate, the upper end of the outer supporting plate obliquely moves towards the side close to the inner supporting plate, and the lower end of the outer supporting plate obliquely moves towards the side away from the inner supporting plate. The space between the side slope and the outer supporting plate is filled with the soil body, the inner supporting plate is vertically supported on the soil body at the bottom of the foundation pit, the outer supporting plate obliquely supports the supporting frame of the side slope, the side slope soil body generates transverse pressure on the supporting frame and also generates obliquely-downward pressure, and then the side slope soil body pushes the supporting frame to transversely and laterally move, so that the dumping resistance is increased; the slope can be stably supported, and collapse safety accidents are prevented.

本发明公开了一种基坑支护支撑装置及其支撑方法，涉及基坑支护技术领域，包括内撑板和外撑板，内撑板和外撑板之间设有扩撑件，内撑板与外撑板相对设置于基坑内边坡底部位置，扩撑件连接内撑板和外撑板相对侧壁组成双层挡土框架，扩撑件支撑外撑板向远离内撑板的一侧倾斜调节，外撑板上端向靠近内撑板的一侧倾斜移动，外撑板下端向远离内撑板的一侧倾斜移动。本发明在边坡和外撑板之间填充土体，形成内撑板垂直支撑在基坑底部土体上、外撑板倾斜支撑边坡的支撑框架，边坡土体除了对支撑框架产生横向压力外还产生倾斜向下压力，进而使得边坡土体推动支撑框架横向侧移倾倒阻力增大，能够稳定支撑边坡，防止出现坍塌安全事故。

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