软土地基稳定性计算中抗剪强度指标的相关分析  

Analysis of shear strength parameters in soft clay ground stability calculation

作　　者：吴玉辉[1] 侯晋芳[2] 闫澍旺[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]中交天津港湾工程研究院有限公司,天津300222

出　　处：《水利学报》2011年第1期76-80,共5页Journal of Hydraulic Engineering

基　　金：天津市科技创新专项基金项目(07FDZDSF02100)

摘　　要：基于摩尔-库伦抗剪强度公式,结合十字板强度与深度的关系,建立了抗剪强度指标的统计回归方程,通过方程可推算出地基土的两个抗剪强度指标。相比较传统的抗剪强度指标,本文推算出的强度指标更接近土体真实的抗剪强度,采用推算指标计算的安全系数更符合工程实际,而且还可用于新型箱筒型基础的稳定性和地基承载力的分析。Based on Mohr-Coulomb theory,and using the linear relation between the vane shear strength and depth,a method of converting in-situ vane shear strength into undrained shear strength parameter is presented.The shear strength parameters are obtained by statistical regression analysis with the anisotropy,lateral compression coefficient and the average consolidation degree in the soft clay taken into account.The comparison between shear strength parameters by CU test and those by UU test shows that the shear strength parameters obtained from regression analysis are very close to the real shear strength of soil.Then,the shear strength parameters are used to the stability calculation of soft clay slope and analysis of the cylindrical caisson foundation engineering.

关 键 词：软黏土 十字板强度 统计回归分析 抗剪强度指标 箱筒型基础 

分 类 号：TU447[建筑科学—岩土工程]