岩土力学2017，Vol.38Issue(4)：951-957,964,8.DOI:10.16285/j.rsm.2017.04.004
超固结软黏土的静止土压力系数与不排水抗剪强度
Coefficient of earth pressure at rest and undrained shear strength of overconsolidated soft clays
摘要
Abstract
The stress path triaxial tests were conducted to examine the coefficient of K0 of different stress paths and the undrained shear stress-strain under K0-conlidation.Formula of K0 coefficient was proposed for K0 overconsolidated soil.Based on anisotropic yield criteria,the undrained shear strength equations of K0 overconsolidated soil were developed.The validity of proposed procedure was verified by comparing calculated results and experimental results.The results indicated that the formula proposed by Mayne and Kulhawy overestimated the coefficient when the OCR was large.The undrained shear strength equations of K0 overconsolidated soil avoided errors which were caused by assuming a constant slope of rebound denoted by the effective overburden pressure,by considering the variation of K0 coefficient with OCR.Experimental results indicated that the proposed formula has the advantage to predict the undrained shear strength of K0 overconsolidated soil.关键词
三轴试验/K0固结/静止土压力系数K0/抗剪强度/超固结比Key words
triaxial test/K0-consolidation/coefficient of earth pressure at rest (K0)/shear strength/overconsolidation ratio分类
建筑与水利引用本文复制引用
纠永志,黄茂松..超固结软黏土的静止土压力系数与不排水抗剪强度[J].岩土力学,2017,38(4):951-957,964,8.基金项目
国家973计划课题(No.2013CB036304).This work was supported by the National Basic Research Program of China (973 program)(2013CB036304). （No.2013CB036304）
