南水北调中线穿黄工程南岸黄土强度特性研究  

Shear Strength Properties of Loess on South Bank of Crossing the Yellow River Project in the Middle Route of South-to-North Water Diversion Project

作　　者：邢义川[1] 李振[2] 安鹏[1] 

机构地区：[1]中国水利水电科学研究院,北京100048 [2]西北农林科技大学,陕西杨凌712100

出　　处：《南水北调与水利科技》2014年第2期129-132,共4页South-to-North Water Transfers and Water Science & Technology

摘　　要：为了查明南水北调中线穿黄工程南岸黄土的工程性质,研究不同工况下的黄土边坡稳定性,并为后续渠道开挖方案的确定提供设计依据,对该区域非饱和黄土强度特性进行了试验研究,内容包括黄土的物理性质试验、饱和黄土三轴CU试验、土—水特征曲线试验和非饱和黄土的抗剪试验。试验结果表明,该区域的黄土为低液限黏土,粉粒含量较大,持水能力较差,吸力内摩擦角φb=7.58°。In order to investigate the characteristics of loess on south bank of crossing the Yellow River Project in the Middle Route of South-to-North Water Diversion Project ,and the slope stability of loess under different working conditions to provide design support for the subsequent channel excavation scheme ,the strength tests of unsaturated loess were conducted in the study area .The experimental tests included the tests of physical properties of loess ,the CU triaxial tests of saturated loess ,the tests of soil-water characteristic curve ,and the shear tests of unsaturated loess .The results showed that the loess in the study area is clay with low liquid limit ,large quantity of silt ,low water-holding capacity ,and a suction internal friction angle of φb=7.58° .

关 键 词：南水北调中线 非饱和黄土 物理力学试验 基质吸力 强度规律 

分 类 号：TV68[水利工程—水利水电工程] TV223