Foundation pit supporting structure

The utility model discloses a foundation pit supporting structure, which can realize large-depth foundation pit construction in a low clearance state by arranging cast-in-situ bored piles and high-pressure jet grouting piles in a combined manner, vertically supporting a foundation pit and transversely supporting the foundation pit through an inner supporting structure, and can form a waterproof curtain on the outer side of the foundation pit through double rows of high-pressure jet grouting piles. The waterproof performance in foundation pit excavation and the stability of foundation pit supporting are guaranteed, in addition, the double rows of high-pressure jet grouting piles are arranged in a lap joint mode, the construction cost is comprehensively reduced, and the water stopping effect is further improved. 本实用新型公开了一种基坑支护结构，通过结合设置钻孔灌注桩和高压旋喷桩，对基坑进行竖向支护，通过内支撑结构对基坑进行横向支护，能够实现低净空状态下的大深度基坑施工，通过双排高压旋喷桩在基坑外侧形成止水帷幕，保证了基坑开挖中的防水性和基坑支护的稳定性，另外，将双排高压旋喷桩进行搭接设置，综合降低施工成本，进一步提高了止水效果。