花岗岩残积土边坡水平拱高竖向变化规律

Variation of Horizontal Arch Height of Granite Residual Soil Slope in Vertical Direction

边坡抗滑桩土拱高度决定了桩及桩间措施的受力分配.本文研究土拱高度沿桩长方向的变化,为边坡抗滑桩及桩间措施的精细化设计提供理论基础.首先采用数值模拟技术,研究土拱高度沿桩深方向的变化规律;继而结合理论分析,建立桩间土拱的力学模型,并提出可考虑埋置深度的桩间土拱高度计算方法.研究结果表明,土拱高度在桩顶及以下不同深度处变化明显,滑面以上桩顶以下4.5 m范围内有土拱,滑面以下可不考虑土拱影响.

Soil arch height of slope anti-slide pile determines the stress distribution of the pile and pile measures. The paper study the variation of soil arch height along the length of the pile, which could provide a theoretical basis for the precise design of slope anti-slide pile and measures between the pile and the pile. Firstly, the numerical simulation technology is adopted to explore the variation law of soil arch height along the direction of pile depth. Combined with theoretical analysis, the mechanical model of soil arch between piles was established. A method for calculating the height of soil arch between piles with embedded depth was proposed. The results show that the soil arch height varies significantly at different depths from the pile top. In the range of 4.5 m above sliding surface and under the pile top, the soil arch appears, while below the sliding surface, the effect of soil arch could be neglected.