土压力公式的统一解  

Unified solution of formulae for earth pressure

作　　者：范文[1] 白晓宇[1] 俞茂宏[2] 孙巧银[1] 

机构地区：[1]长安大学地质工程与测绘工程学院,陕西西安710054 [2]西安交通大学建筑工程与力学学院,陕西西安710049

出　　处：《煤田地质与勘探》2005年第2期52-55,共4页Coal Geology & Exploration

基　　金：国家自然科学基金资助研究项目 (5 992 4 0 33) ;国土资源部岩土工程开放研究实验室资助项目 (KF0 11)

摘　　要：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,但中间主应力效应是存在的且不容忽视的。基于俞茂宏统一强度理论,考虑中间主应力效应,推导了土压力公式的统一解,给出了具有广泛意义的土压力公式,可以充分发挥材料的强度潜能,Rankine土压力公式为其特例。根据不固结不排水强度指标与固结不排水强度指标,按有效应力法与总应力法对土压力的计算公式进行了推导和分析,得出了两种强度指标下的土压力公式。另外,通过已有文献的实例进行了对比分析。The effect of the intermediate principal stress was not considered in the traditional earth pressure theories, which did exist and should not be negle cted. Based on the unified strength theory considering the effect of the interme diate principal stress proposed by Yu Maohong in 1991, this paper deduced the eq u ations that can be widely applied. The solution of Rankine is a special case of this paper. According to the relations between the undrained strength parameter and concreted undrained strength parameter, the formulae for earth pressure are deduced and analyzed by using effective stress method and total stress method, a nd the relation of the earth pressures under the two cases are got. At last , th e paper contrasts the results of the unified solution with other papers publishe d.

关 键 词：强度理论 统一强度理论 土压力 应力 

分 类 号：TU432[建筑科学—岩土工程]