摘要
基于K0固结试验原理,将花岗岩残积土试样恢复到天然的K0应力状态,然后进行不排水剪切试验,同时进行三向等压固结状态下的不排水剪切平行试验。经试验结果分析,可知:花岗岩残积土静止侧压力系数K0试验值分布于0.38～0.40,与K0固结土样的K0计算值相近,K0固结试验测得的K0值比传统方式测得的数据稳定;花岗岩残积土CU剪切应力-应变关系呈加工硬化型;对比三向等压固结方式,K0固结条件对花岗岩残积土的破坏偏应力和抗剪强度指标有较大影响。
Based on the principle of K0 consolidation,the soil specimens were initially restored to the in-situ stress state under K0 consolidation,then triaxila CU tests were presented.Meanwhile,in order to make a comparison,tests on the specimens under isotropic consolidation condition were carried out.The test results showed that：（1）K0 value of this kind of soil was distributed from 0.37 to 0.40,these measured values are similar to the calculating ones.Compared with traditional method,the K0 values obtained by K0 consolidation tests are more stable.（2）The shear stress-strain curve in a undrained condition indicated a hardening one.（3）Compared with isotropic consolidation,K0 consolidation has a conspicuous infulence on the shear strength indexes of the saturated granite residual soil.
出处
《福建建筑》
2011年第8期47-50,共4页
Fujian Architecture & Construction
基金
侨办基金(09QZR03)
关键词
花岗岩残积土
K0固结
K0值
抗剪强度指标
Granite residual soil K0 consolidation K0 value Shear strength indexes
