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一、引言确定作用于刚性挡土墙上的被动土压力是土木工程中最广泛的研究课题之一。大多数计算被动土压力的方法都认为土楔体处于极限平衡状态,只是滑动面形状和静力学应用的假定有所不同。由于对滑动面形状和土壤可变特性的解释多种多样,因而有实践经验的工程师广泛地使用条分法来确定作用于挡土墙的被动土压力。本文推荐使用条分法估算被动土压力系数的简易方法。二、推导在本研究中,假定滑动面按太沙基所建议的由一根对数螺线和一根直线组成(图一),从而导出具有一般C-φ特性土壤的被动推力的表达式。假定土壤是均质的且有效强度参数是各向同性的。把图-BD曲线部分以上的面积分成若干土条并用一般的分条程序进行分析。
I. INTRODUCTION Determining the passive earth pressure acting on a rigid retaining wall is one of the most widely studied topics in civil engineering. Most methods for calculating the passive earth pressure consider the wedge body to be in equilibrium, except that the shape of the sliding surface is different from the assumption of statics. Due to the wide variety of interpretations of the shape of the sliding surface and the variable properties of the soil, engineers with practical experience widely use the strip method to determine the passive earth pressure acting on the retaining wall. This article recommends the use of a strip method to estimate a simple method of passive earth pressure coefficient. Deduction In this study, it is assumed that the sliding surface is composed of a logarithmic spiral and a straight line (Fig. 1) according to the recommendations of Tai Saki, thereby deriving an expression for the passive thrust of a soil with general C-φ characteristics. . It is assumed that the soil is homogeneous and that the effective strength parameter is isotropic. Divide the area above the graph-BD curve section into several soil strips and analyze them using a general striping procedure.