高温–高含冰量冻土蠕变试验研究

为了研究高温–高含冰量冻土的蠕变特性,开展了温度分别为-0.3℃,-0.5℃,-1.0℃,含水率分别为40%,80%,120%的冻结黏土单轴压缩蠕变试验。试验结果表明,无论应力多大、作用时间多长,高温–高含冰量冻结黏土单轴压缩蠕变过程都具有衰减特征;在相同的温度条件下,在相同时刻、含水率40%时冻土强度最大,含水率120%时次之,含水率80%时最小;还得到高温–高含冰量冻结黏土单轴压缩蠕变方程、应力–应变关系和长期强度方程的参数。

Experimental study on creep of warm and ice-rich frozen soil

In order to study the creep characteristics of warm and ice-rich frozen soil,a series of uniaxial creep tests of frozen clay with water content of 40%,80%,120% at temperature of –0.3℃,–0.5℃,–1.0℃were conducted respectively.It was shown that the creep process of the warm and ice-rich frozen soil was always attenuate;at the same temperature and time,the strength of the frozen soil with 40% water content was the greatest,and that with 120% water content was greater than that with 80%.Furthermore,the parameters of the creep equation,long-term strength equation and relationship between stress and strain of the warm and ice-rich frozen soil were obtained.