黄土滑坡微型桩抗滑作用现场试验与数值模拟

In-situ test and numerical analysis of skid resistance for micropile to loess landslide

摘要: 通过现场大型模拟试验和数值(FLAC3D)模拟,研究了黄土滑坡中微型桩滑坡推力及桩后土体抗力分布规律。综合试验结果及数值分析认为:滑坡推力在微型桩上的分布形式可近似认为为三角形,推力在滑面处达到最大值;滑坡推力在五排桩上的分配系数为:0.279,0.195,0.189,0.161,0.176;桩后土体抗力与滑坡推力变化趋势相对应,在滑面附近达到最大值;根据实测值绘出微型桩P-y曲线,并拟合出相应公式,其成果可为微型桩变形破坏机理分析提供基础资料,为微型桩设计提供参考。

Abstract: Based on tests of large-scale physical models and numerical analysis(FLAC3D),distribution of landslide-thrust and resistance of soil acting on micropiles in loess landslide were studied.Results from in-situ tests and numerical modeling indicate that the distribution mode of landslide-thrust is triangle,which reach its maximum at the sliding surface.Distribution coefficient for landslide-thrust on the five rows of micropiles is 0.279,0.195,0.189,0.161,0.176.Only resistance near the sliding surfac...