中文摘要：

以墙后填土为非饱和土的刚性挡墙为研究对象,考虑土拱效应和水平微单元体层间剪切作用的影响,假定墙后土拱形状为抛物线形拱,结合水平单元分析法、朗肯滑裂面等,分别建立了平动模式下水平微单元体平均竖向应力、层间剪切力与被动土压力的定量关系,然后推导了平动模式下的挡墙被动土压力系数及被动土压力解析解,并加以实例及参数分析。该方法能考虑墙后土体中的应力偏转以及水平微单元体层间剪切作用,较之于传统的挡墙土压力计算方法,能够更真实地反映土体中的应力状态,可为工程实践提供一定指导。

英文摘要：

A rigid retaining wall with unsaturated soil backfill was taken as the research object,by considering the soil arching effects and the inter laminar shear action in the process with the assumption of parabolic arch and combining with horizontal layer analysis method and Rankine＇slip surface,the quantitative relationships between average vertical stress,the inter laminar shear stress of soil differential element and the passive earth pressure were calculated. Analytical expressions for the passive earth pressure ratio and passive earth pressure were derived,and parameter as well as specific example analysis were given. Compared with the conventional methods,stress deflection and the inter laminar shear action was considered,which were more closed to the true stress state and could provide some guide for engineering practice.