正常固结饱和土总应力强度指标的有效应力分析

The Effective Stress Analysis of Total Stress Strength Parameters For Normally-consolidated Saturated Soil

基于土的有效应力原理,从库伦定律和莫尔-库伦强度理论表达式探讨了抗剪强度与总应力呈线性关系应满足的应力条件;讨论了UU和CU剪对应的应力条件,从理论上证明了其强度包线的存在性并推导了相应的总应力强度指标表达式,分析了破坏时破坏面上的有效应力.

Based on the principle of effective stress, Columb＇s law and Mohr-Columb＇s theory, the stress condition which should be satisfied for the obtained points from non-fully drained strength testing on normally-consolidated saturated soils to lie in a line are derived. The stress situation and the existence of linear strength envelope of normal UU and CU tests are subsequently analyzed and the expressions relating the strength parameters of total stress to that of effective stress are presented. Finally, the characteristics of the effective stresses on the failure planes of UU and CU testing were discussed and the ratio of φf（t）/φf（t）〉 andφ′/φ are computed.