摘要
通过对新疆岳普湖～英吉沙公路及和硕～库尔勒高速公路沿线的天然盐渍土室内基本性质试验分析，选取典型天然盐渍土，在开放系统中进行反复冻融循环条件下的试验，从土类角度研究了天然盐渍土在多次冻融循环时的强度变化特征。试验结果表明：经多次冻融循环，低液限粘土试样粘聚力自下而上线性减小，内摩擦角呈S形分布；含砂低液限粘土试样冻融循环过程中，试样粘聚力呈反S形分布，内摩擦角均呈S形分布；低液限粉土试样各层土粘聚力随着冻融循环次数的增加逐渐减小，各土层内摩擦角随着冻融循环次数的增加而减小。
On the basis of the results of testing saline soil samples of Yue-Ying Highway and He-Ku Expressway, the representative crude saline soil samples are selected for the experiment of freeze-thaw cycle. The characteristics of shear strength of crude saline soil are researched from soil type. The results of tests show that the distribution of cohesion of low liquid-limit clay decreases linearly form bottom to top and the distribution of the angle of internal friction is ＂S＂ form under freeze-thaw cycle. The distribution of cohesion of bearing sand low liquid-limit clay is in reverse ＂S＂ form. Cohesion of low liquid-limit silt gradually decreases and the angle of internal friction increases with the increase of freeze-thaw cycle number.
出处
《公路》
北大核心
2008年第1期5-10,共6页
Highway
基金
国家西部交通建设科技项目(200331879750)
关键词
道路工程
盐渍土
冻融循环
抗剪强度
粘聚力
内摩擦角
road engineering
saline soil
freeze-thaw cycle
shear strength
cohesion
internal friction angle
