高填方渠堤土体强度差异对比分析

Comparative Analysis of the Strength of High Fill Embankment

摘要: 南水北调工程是解决我国水资源分布不均匀，促进地方经济发展和社会进步的一项重大举措。选取南水北调中线某高填方渠段的两种不同土体，分别进行了不同含水率下的直接剪切实验。对比分析了两种土体在相同含水率下抗剪强度、粘聚力和内摩擦角的差异性。结果表明：两种土体的强度均随含水量的降低而增大，而水泥改性土在含水率较高下的强度小于渠基弱膨胀土的强度，在含水率较低的情况下则相反。

Abstract: The south-to-north water Diversion project is a major measure to solve the uneven distribution of water resources in China and promote the local economic development and social progress. Two different soils from a high fill canal of the middle route of the South-to-North Water Diversion Project were selected to perform direct cut experiments at different water content. The difference of the shear strength, cohesion and internal friction angle at the same water content were analyzed. The results show that the strength of both kinds of soil increases with the decrease of water content, while the strength of cement modified soil is less than that of weak expanded soil, while the opposite is true.