固结不排水剪总应力强度指标的几点讨论  

Some Problems About Strength Parameters of Total Stress Under Consolidated-undrained Test

作　　者：罗嗣海[1] 黄松华[2] 胡火旺[2] 

机构地区：[1]华东地质学院资源与环境工程系,临川344000 [2]华东地质学院工程勘察研究院,临川344000

出　　处：《岩土力学》1999年第4期36-41,共6页Rock and Soil Mechanics

摘　　要：建立了偏离室内常规三轴压缩试验应力条件下的总应力强度指标和有效固结压力强度指标的理论公式;讨论了这两种强度指标的变化规律及其与室内常规CU试验指标的差异;简要地分析了直接将室内常规CU试验指标用于压缩与伸长土单元的强度计算、用于有效固结压力法确定抗剪强度和用于土压力与地基极限承载力计算时的偏差情况。Theoretical formulae of cu and c are established taking into account the consolidation stress prior to shear and stress path during shear process. The variation of cu with some factors and its discrepancy from are ahalyed. The strength parameter for effective consolidation pressure method is also discussed .Based on the above-metioned analyses, the errors of shear etrength in compression and extension soil element by total stress method or effective consolidation pressure methed, and the ennrs of earth pressure and bearing capacity ,due to the application of lab to in-situ conditions are qualitatively estimated.

关 键 词：总应力强度指标 极限承载力 固结不排水 地基 

分 类 号：TU431[建筑科学—岩土工程] TU432[建筑科学—土工工程]