冻土抗压强度对应变速率敏感性分析

The Strain Rate Sensitivity Analysis of Compression Strength of Frozen Soil

在室内采用人工冻结的方法，制备冻土试样，进行单轴抗压强度的实验研究。获得不同应变速率及不同温度的压力一应变曲线。在给定的温度下，研究了强度与应变速率之间的关系，得出：在给定的应变速率范围内，研究了强度与温度的关系，得出表达式，并给出了相应参数α、β、ｎ及σ＿０、Ｋ、ｍ的取值范围。最后，应用上述公式进行强度计算，与实测结果比较吻合。

The samples of frozen soil are made in the laboratory artificially，and experiment studiesof uniaxial compression are carried out．The curves of stress－strain are obtained with differ－ent strain rates and at different temperatures．At a certain temperature，the relation betweenstrength and strain rate is explored，a formula，is obtained．within a cer－tain temperature range, a expression of relation between strength and temperature, is presented and a range ofvalues for parametar α，β，n and σ_0，K, mobtained．Fimally above formulae are employed to calculate the compression stenghth．Theresults are in good accordance with practical measurements.