武广客运专线非饱和红粘土的快剪 与慢剪对比试验研究

采用某客运专线3个工点的非饱和红粘土试样进行三轴、直剪的不固结不排水剪切、固结不排水剪切和固结排水剪切试验，获得了这3个工点的直剪、三轴试验指标，分别对其进行了不固结不排水剪与固结排水剪强度指标对比，获得了相应的比值，提出了建议，对客运专线非饱和红粘土地段设计参数的选取具有参考作用。

The Contrast Study between Quick Shear Test and Slow Shear Test of Unsaturated Red Clay in the Passenger Transportation Line

Three groups of unsaturated red clay samples have been chosen from the three section of in the passenger transportation line respectively. After UU, CU, and CD tests of the samples, the direct shear test target and triaxial test target have been obtained. Meanwhile, after comparing these target with UU test strength index and CD test strength index respectively, the corresponding ratio is obtained and some advice are provided, which has important reference function when it refers to the design parameter in the sector of unsaturated red clay in the passenger transportation line.