基于统一强度理论朗肯土压力参数的正交试验

经典朗肯土压力理论是土压力计算的重要理论之一，采用统一强度理论主应力型表达式和平面应变假设，首先将挡土墙土压力问题视为平面应变问题，通过广义虎克定律确定出中主应力，并根据朗肯土压力分析原理确定出另外一个主应力，最后结合统一强度理论主应力型表达式分别推导了朗肯主动土压力和被动土压力的计算公式。经典的朗肯土压力计算公式仅为该统一解的特例。最后通过算例采用正交试验设计对反映中主应力影响的中间主剪应力系数、粘聚力、内摩擦角、重度 4种因素进行了敏感性分析。结果表明，中主应力对朗肯土压力计算结果的影响是一个不可忽视的重要因素。 

Sensitivity analysis of parameters of Rankine earth pressure based on unified strength theory

Classical Rankine earth pressure theory is an important calculation of earth pressure theories.The issue of wall earth pressure will be regarded as problem of plane strain,so we calculate intermediate principal stress by generalized Hook's law in plane strain assumption.We determine principal stress in accordance with the principle of Rankine earth pressure.On this basis,the formula of Rankine earth pressure is derived when the expression of principal stress in double-shear unified strength theory is used.T...