摘要
采用固结不排水剪切方法,对粉土进行了增湿情况下的三轴剪切试验。试验结果表明,随着初始含水率增加,粉土试样的变形破坏逐渐由脆性特征转变为延性特征;极限抗剪强度随着围压增加线性增大,随着含水率增加非线性降低;同时,随着初始含水率增加,粉土的黏聚力显著减小,但内摩擦角减少并不明显,且抗剪强度指标与初始含水率均呈负幂指数关系变化。
The consolidated undrained triax.ial test was carried out on silt in the case of moistening. It is found that with the initial moisture content increased, the deformation and failure of silt specimen gradually change from the brittle characteristics to ductile characteristics. Moreover, the ultimate shear strength of silt increases linearly with the increase of the confining pressure, and decreases nonlinearly with the increase in moisture content. And the cohesion of silt reduces remarkably with the increase in moisture content, but the internal friction angle decreases insignificantly, however, the shear strength index of silt present a negative exponential relationship with the initial moisture content.
出处
《低温建筑技术》
2010年第4期20-22,共3页
Low Temperature Architecture Technology
关键词
粉土
增湿
抗剪强度
三轴试验
silt
moistening
shear strength
triaxial test
