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基于滑楔理论计算土压力的基本原理,运用考虑中间主应力效应的统一强度理论,对传统的土压力公式不能反映土体材料强度的中间主应力效应的公式进行了改进,推导了基于滑楔理论的土压力统一解公式,Coulomb和Rankine土压力公式为其特例。通过变换统一强度参数,可获得一系列的解。在工程运用中可根据土质和工程的实际情况,适当选择统一强度参数和应力状态来确定土压力的大小。
Based on the basic principle of sliding-wedge theory for calculating earth pressure and applying the unified strength theory which takes into account the effect of intermediate principal stress, the formula of traditional principal stress effect of soil material strength can not be reflected by the traditional earth pressure formula. The theory of earth pressure unified solution formula, Coulomb and Rankine earth pressure formula is its special case. By changing the uniform strength parameters, a series of solutions can be obtained. In engineering application, according to the actual conditions of soil and engineering, the appropriate choice of uniform strength parameters and stress state to determine the size of earth pressure.