基于双剪统一强度理论的加筋土挡墙卡斯台德空间土压力  

Twin shear Unified Solution of J.Karstedt Space Earth Pressure of Reinforced Retaining Wall

作　　者：王维[1] 刘哲哲 黄向京[1] 

机构地区：[1]湖南省交通规划勘察设计院,湖南长沙410008 [2]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《公路工程》2010年第5期17-19,25,共4页Highway Engineering

基　　金：湖南省交通科技(项目200612)

摘　　要：将加筋土看作各向异性的复合体材料,采用双剪统一强度理论,考虑中间主应力的影响,导出了加筋土挡墙卡斯台德空间土压力的双剪统一解。所给出的解可适用于采用各种筋材各种填料的空间土压力的计算。运用双剪统一强度参数公式可求算不同b值所对应的筋土复合体的强度参数,该值同时包含了σ1、σ2和σ3对加筋土强度的贡献,并可将与平面问题对应的常规土工试验方法所测得的强度指标cp和φ换算成空间问题所需要的强度指标ct和φt。统一解可以更好的发挥筋土复合体的强度潜力,应用于实际工程将产生一定的经济效益。The reinforced soil was considered as a kind of composite material with characteristic of aeolotropy,the formulae of J.Karstedt space earth pressure of reinforced retaining wall were derived based on the twin shear unified strength theory.The solutions given are appropriate to reinforced soil of different reinforcements and different fillings.The strength parameters of reinforced soil can be calculated by using the twin shear unified strength theory when the coefficient b is of different values,which contain the contributions of the main stresses σ1、σ2 and σ3.The plain strength parameters cpand tested by conventional soil tests can be converted into ct and t respectively,which can be used to solve space problem.The unified solutions can make better use of the strength of the reinforced soil,and help obtain a certain degree of economical benefit.

关 键 词：道路工程 空间主动土压力 双剪统一强度理论 卡斯台德法 加筋土 

分 类 号：U417.11[交通运输工程—道路与铁道工程]