摘要
高液限黏土具有天然含水率高、孔隙比大及结构性强等特点,属于特殊路基填料。为了获得高液限黏土的动态回弹性能,利用动三轴试验研究了高液限黏土动态回弹模量的影响因素及其规律,分析了动态回弹模量对偏应力、侧应力、体应力的依赖关系。研究表明,动态回弹模量随压实度和围压应力的增大而增大,而随循环偏应力的增大而减小。动态回弹模量受含水量影响较大,并在最佳含水量附近达最大值。试验结果为确定高液限黏土路基填筑含水量和压实度控制指标提供了依据。
High liquid limit clay has the properties,such as high natural moisture content,large void ratio and strong structural property,etc. For the sake of investigating the dynamic resilient performance,a series resilient modulus tests were carried out by conducting dynamic-triaxial test. The factors which affect the high liquid limit clay dynamic resilient modulus and their laws were studied. The relationships between deviation stress,confining stress,bulk stress and dynamic resilient modulus were analyzed. The study demonstrated that dynamic resilient modulus rise with the increase of confining stress,compaction degree,in reverse of circular deviator stress. The dynamic resilient modulus were greatly influenced by the water content,and it reached its maximum near the optimum moisture content. The test results can provide basis for subgrade filling water content and compaction degree control indicators of high liquid limit clay.
出处
《公路工程》
北大核心
2015年第1期182-185,共4页
Highway Engineering
基金
湖南省交通科技项目(201112)
湖南省交通科技项目(201310)
关键词
高液限黏土
动回弹模量
动三轴试验
应力依赖
双因素方差分析
high liquid limit clay
dynamic resilient modulus
dynamic-triaxial test
stress-dependent
dual-factor analysis
