武广客运专线红黏土抗剪强度参数试验对比和分析  

Comparison and Analysis of the Shear Strength Parameters Test about Red Clay of Passenger Transport Line from Wuhan to Guangzhou

作　　者：杨果林[1] 余敦猛[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《铁道建筑技术》2007年第1期14-16,共3页Railway Construction Technology

摘　　要：对武广客运专线红黏土的大量试验表明,剪切与三轴压缩实验测得的抗剪强度参数值不一致,而且直剪试验内摩擦角大于三轴试验,两种试验的黏聚力互有大小。基于上述实验结果,从试验方法和条件的角度分析了两种实验所得参数不一致的原因,并给出了三轴压缩试验和抗剪强度参数之间的线性关系式。建议今后在给出红黏土的黏聚力和内摩擦角时应标明是由何种试验方式所测得的,并提出了红黏土抗剪强度参数的选取原则。Laboratory tests were performed on passenger transport line from Wuhan to Guangzhou. The results show that shear strength parameters from a shear test and a tri-axial compressive test are not consistent, and the friction angle of the shear test larger than the tri-axial. The cohesion of the two kinds of tests is overlap. According to the above experimental results, reasons for the differences between the two kinds of tests were analyzed respectively based on the strength theory of the methods and conditions of laboratory tests. Linear correlation between the shear strength parameters of red clay from a tri-axial test and the shear strength parameters was set up. It＇s suggested that, when the cohesion or the friction angle of red clay is given, the type of the tests be described. In addition, the principles of determining the shear strength parameters of red clay of passenger transport line from Wuhan to Guangzhou were put forward.

关 键 词：客运专线 红黏土 抗剪强度参数 三轴试验 剪切试验 

分 类 号：TU411.7[建筑科学—岩土工程]