Lade-Duncan准则在土压力计算中的应用  

APPLICATION OF LADE-DUNCAN CRITERION IN EARTH PRESSURE CALCULATION

作　　者：胡贺祥[1] 宋福渊 耿冬青[1] 郭恒[1] 

机构地区：[1]中国建筑股份有限公司技术中心,北京101300

出　　处：《工业建筑》2013年第12期109-112,166,共5页Industrial Construction

基　　金：中国建筑股份有限公司科技研发课题(CSCEC-2010-002)

摘　　要：基于严格意义上的Lade-Duncan准则,将挡土墙土压力计算问题视为平面应变问题,推得了黏性土与无黏性土的主动和被动土压力计算公式,推导中由于考虑了中主应力的影响,所以更真实地反映了土压力的作用情况。与以往应用Lade-Duncan准则在平面应变条件下的强度公式不同,该推导完全基于LadeDuncan准则,而没有借助由SMP准则得到的中主应力公式。为了验证公式的有效性和优势,将公式计算与实测结果进行对比。结果表明:相对于朗肯理论和基于SMP准则的方法,该方法更为接近实测结果,而又留有一定的安全储备。Based on the strict Lade-Duncan criterion , to take earth pressure problem as plane strain problem , the formulae of the active and passive earth pressure for clay and non-cohesive soil were derived , which could reflect the action of earth pressure more really , considering the intermediate principal stress .Unlike the past papers , the proposed formulae were derived only from the Lade-Duncan criterion, with no help of the SMP criterion .To verify the feasibility of the proposed formulae , the results determined from the proposed formulae were compared with those obtained from the experiment , also with those obtained from Rankine ’ s theory.It was shown that the results determined from the proposed formulae enough safety storage , and were in better agreement with those obtained from the experiment .

关 键 词：土压力 平面应变 中主应力 Lade-Duncan准则 

分 类 号：TU432[建筑科学—岩土工程]