不同温度下饱和黏土抗剪强度试验研究

Experimental study on shear strength of saturated clay at different temperatures

通过开展不同温度下土的三轴剪切试验,获得了不同围压、不同温度下饱和黏土的应力-应变特性曲线,分析了温度对饱和黏土强度特性的影响,讨论了三轴抗剪强度与温度、围压的关系。结果表明:不同温度和围压下试样的剪切曲线均呈现较为明显的温度硬化形态;随温度的升高,黏性土的c,φ值均有所减小,土的强度降低;软黏土抗剪强度的温度效应与试样所受的围压有一定的关系,围压越大其温度效应越明显。

Triaxial shear strength tests on the clay at different temperatures were carried out to obtain stress-strain characteristic curves of saturated clay at different confining pressures and temperatures. The effect of temperature on strength properties of saturated clay was analyzed,and the relationship between triaxial shear strength and temperature as well as confining pressure was discussed. The results show that shear curves of samples at different temperatures and confining pressures show a significant temperature hardening forms; the values of c,φ of the clay are reduced with the rise of temperature and strength of soil is reduced; temperature effect on shear strength of soft clay is related to the confining pressure of samples,and the greater the confining pressure is,the more obvious the temperature effect is.