条形基础作用下加固边坡的抗震稳定性分析  

Seismic stability analysis of strip foundation loaded slope reinforced by a row of piles

作　　者：王作伟 黄诗阳 

机构地区：[1]长沙市中等城乡建设职业技术学校,湖南长沙410216

出　　处：《湖南文理学院学报（自然科学版）》2017年第3期88-94,共7页Journal of Hunan University of Arts and Science(Science and Technology)

摘　　要：边坡坡顶设有构筑物时,其埋置于坡顶土体内部的条形基础将对边坡稳定性构成直接影响。借助极限分析上限原理,对坡顶作用有条形基础的加固边坡的抗震稳定性进行了研究。基于对数螺旋曲线破坏模式,通过各项功率的确定,获得了边坡抗震安全系数的表达式。通过参数优化分析了条形基础尺寸、土体强度非线性和地震荷载等因素对边坡稳定性和潜在滑移范围的影响。分析结果表明:抗滑桩最佳支护位置不因土体强度参数的改变而发生变化;条形基础尺寸、地震荷载和土体强度非线性等因素均对边坡稳定性影响显著。Strip foundation located on slope crest will significantly influence the stability of slope. Based on the limit analysis upper bound theorem, a nonlinear seismic stability analysis of slope with strip foundation on crest is conducted. Objective function is obtained by equaling the external works to the internal energy dissipation of the potential logarithm failure curve, then the optimal solution of the slope safety factors are obtained by parameter optimization. Parameter analysis of strip foundation shape, soil nonlinearity and seismic forces on slope stability as well as the sliding curve is taken place afterwards. The results show that the most suitable reinforcement location of piles on slope will not change no matter what the strength parameters are, at the same time, factors such as the strip foundation shape, the seismic forces and the soil nonlinearity all have significant effects on slope stability.

关 键 词：边坡稳定性 条形基础 上限法 土体非线性 抗震稳定性 

分 类 号：P642.22[天文地球—工程地质学]