超固结土的一维固结理论及其试验研究  

Experimental Verification of One-Dimensional Linear Over-Consolidation Theory

作　　者：梁仕华[1] 齐添[2] 谢康和[3] 王坤[3] 

机构地区：[1]广东工业大学,广州510006 [2]广州穗监工程质量安全检测中心,广州510150 [3]浙江大学,杭州310058

出　　处：《应用力学学报》2009年第2期268-273,共6页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金项目(50679074);国家教育部高校博士点基金项目(20070335179)

摘　　要：基于超固结饱和土固结理论,针对变荷载、自重应力分布等条件下提出了相应的一维超固结土问题的控制方程,总结出六个超固结土的一维线性固结计算参数,并采用半解析法编制了求解该问题的Fortran计算程序。利用GDS高级固结仪对萧山黏土进行超固结土的一维固结渗透联合试验以及一维固结压缩试验,将测定的一维超固结土计算参数引入理论程序中,分别对比了位移、平均固结度、底部孔压这三者随时间变化的理论和试验曲线。结果表明:超固结土的一维线性固结理论比正常固结土的一维线性固结理论更接近试验结果,验证了超固结土的固结理论,表明了考虑土体应力历史对固结计算的重要性。Basic governing equation of 1-D linear over-consolidation was derived taking into consideration time-dependent loading,self-weight stress distribution,etc.Six consolidation parameters on 1-D over-consolidated soil were summarized.Following the semi-analytical solution,the corresponding computer program named ODLCAOS was developed.Consolidation and permeability tests on over-consolidated Xiaoshan soil were carried out by GDS ADVCTS.Over-consolidation theory was then applied to predict curves including varying settlement,average consolidation degree and pore pressure of undrained surface with time.Simulations considering effect of stress history indicate better agreement with the consolidation tests than the normal consolidation theory,and thereby the 1-D linear over-consolidation theory is more suitable for soft Xiaoshan soil.

关 键 词：超固结土 一维固结 GDS高级固结仪 固结计算参数 试验曲线 

分 类 号：TU411[建筑科学—岩土工程]