Foundation pit supporting structure and foundation pit supporting method: Fid-Bau Portal

Foundation pit supporting structure and foundation pit supporting method

WANG YONGHONG / HAO XIAOGUANG / CHEN WENQIANG / ZHANG HANRU

The invention relates to the field of building construction structures and processes thereof, in particular to a foundation pit supporting structure and a foundation pit supporting method.The foundation pit supporting structure comprises a positioning base, inner inclined cantilever piles, outer inclined cantilever piles, a cross support, a waterproof curtain and supporting piles, and the inner inclined cantilever piles and the outer inclined cantilever piles are alternately arranged; the inner inclined cantilever pile and the outer inclined cantilever pile intersect to form an X shape, the positioning seat is fixedly arranged on the top of the inner inclined cantilever pile and the top of the outer inclined cantilever pile, and the intersection point of the inner inclined cantilever pile and the outer inclined cantilever pile is located on the edge of the bottom face of a foundation pit. And one end of the crossed support is fixedly arranged on the crossed point of the inner inclined cantilever pile and the outer inclined cantilever pile, and the other end is fixedly provided with a supporting pile extending below the pit bottom. The crossed support provides stable support at the junction of the bottom and the side wall of the foundation pit, collapse of the side wall of the foundation pit and intersection of the inner inclined cantilever pile and the outer inclined cantilever pile are avoided, the positioning seat is poured at the top, the upper half part forms a stable triangular supporting structure, the lower half part goes deep into the bottom of the foundation pit, and the anti-overturning performance of the supporting structure is improved.

本发明涉及建筑施工结构及其工艺领域，具体涉及一种基坑支护结构及基坑支护方法，基坑支护结构包括定位座、内斜悬臂桩、外斜悬臂桩、交叉支座、隔水帷幕和支撑桩，内斜悬臂桩和外斜悬臂桩交替排列，内斜悬臂桩和外斜悬臂桩相互交叉成X型，定位座固设于内斜悬臂桩和外斜悬臂桩的顶部，内斜悬臂桩和外斜悬臂桩交叉点位于基坑底面的边缘，交叉支座的一端固设于内斜悬臂桩和外斜悬臂桩交叉点上、另一端固设有向坑底下方延伸的支撑桩。交叉支座在基坑底部和侧壁的交界处提供稳定的支撑，避免基坑侧壁塌陷，内斜悬臂桩和外斜悬臂桩交叉，且顶部浇筑定位座，上半部分形成稳固的三角形支护结构，下半部分深入基坑底部，提高支护结构的抗倾覆性能。

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