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山地边坡偏压作用会导致基坑不稳定。本文为了证明这一影响,对基坑与边坡的合理设计间距进行了分析,采用FLAC3D软件,分析了基坑和边坡不同距离下基坑的边坡沉降、桩变形等。结果表明,高边坡下基坑施工中,近、远边坡桩最大位移和基坑边坡距离分别为递减和递增关系。距离在24米以上,两侧桩最大位移开始稳定。基坑边坡侧地表最大沉降值和基坑距边坡距离在不同情况下,基坑整体稳定性也会也会有不一样的要求。
Mountain slope bias will lead to pit instability. In order to prove this influence, the reasonable design spacing of foundation pit and slope is analyzed. The FLAC3D software is used to analyze the settlement and pile deformation of foundation pit under different distances between foundation pit and slope. The results show that in the construction of the foundation pit under high slope, the maximum displacement of the proximal and distal slope piles and the slope of the foundation pit are decreasing and increasing respectively. At a distance of more than 24 meters, the maximum displacement of the pile on both sides begins to stabilize. The maximum settlement on the slope side of the foundation pit and the distance between the foundation pit and the slope under different conditions, the overall stability of the foundation pit will also have different requirements.