冻结粉质黏土声学特性与物理力学性质试验研究

发布时间：2018-07-05 16:46

  本文选题：土力学 + 超声波波速　； 参考：《岩石力学与工程学报》2015年07期

【摘要】：为分析冻结粉质黏土的声波参数与其物理力学性质之间的关系,进行冻结粉质黏土的超声波测试,同时测定了其在不同温度下的抗拉、抗压强度。基于试验分析温度、含水率和干密度等对冻土波速的影响以及波速与强度的关系。结果表明:土样在-1℃~-7℃范围内,波速变化尤为剧烈;存在一个临界含水率16.03%,使波速随含水率的增加呈先增加后减少的趋势;在含水率相同的情况下,波速随干密度的增加呈线性增加;通过波速计算得到冻结粉质黏土的3个动弹性力学参数,并分析这些参数随温度的变化趋势;冻土声波波速与强度呈现出良好的相关性,冻土的强度越大,声波波速越高。因此,可利用声波测试技术对冻土进行无损检测,为冻土强度的预测奠定基础。
[Abstract]:In order to analyze the relationship between the acoustic wave parameters of frozen silty clay and its physical and mechanical properties, the ultrasonic testing of frozen silty clay was carried out, and the tensile and compressive strength of frozen silty clay at different temperatures was also measured. The influence of temperature, moisture content and dry density on the wave velocity of frozen soil and the relationship between wave velocity and strength are analyzed. The results show that the variation of wave velocity is especially sharp in the temperature range of 1 鈩，

本文编号：2100959