深部原状和扰动冻粘土力学性能差异性研究

A Study on the Differences of Mechanical Properties Between Original and Disturbed Frozen Clays in Deep

根据原状冻土和扰动冻土的强度和蠕变试验结果，全面地讨论了原状、扰动冻粘土单轴抗压、抗拉、抗剪强度及蠕变变形特性的差异性。由试验得出，原状冻粘土强度及蠕变变形低于扰动冻粘土，而弹模高于扰动冻粘土。并说明了两种冻粘土力学指标出现差异的原因。

In this article, based on the experiments in strength and creep, the differences of compression, tensile, shear strength and creep between original and disturbed frozen clays are discussed. According to the experiments, the strength and creep deformation of original frozen caly are smaller and the moduli are larger as compared with that of disturbed frozen calys. It is explained why mechanical properties between original and disturbed frozen clays are different. The results are available for determining design index of freezing engineering.