兰州马兰黄土的水敏感性特征  

Water sensitivity of Malan loess in Lanzhou

作　　者：李保雄[1] 牛永红[2] 苗天德[1] 

机构地区：[1]兰州大学土木工程与力学学院 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《岩土工程学报》2007年第2期294-298,共5页Chinese Journal of Geotechnical Engineering

基　　金：中国国家科委攻关项目(CII-CT92-0004);甘肃省科学基金资助项目(2003506)

摘　　要：马兰黄土在水软化作用下,土体的物理、力学与水理性质呈现出明显的规律性,属典型的水敏感性地质体。通过多断面勘测,采用不同的原位及室内试验方法,分别在荷兰尤怀特大学和甘肃兰州对兰州地区马兰黄土的工程地质性质进行了系统测试。在大量试验资料的基础上,对兰州马兰黄土的水敏感性特征进行了多方法研究,根据试验室和原位测试结果,论述了兰州马兰黄土水理性质和抗剪强度的变化规律,划分了兰州马兰黄土类脆性变形和类塑性变形的界限,提出了兰州马兰黄土的多项临界指标参数。Malan loess was a special water sensitive geological deposit, whose physical, mechanical and hydraulic properties changed obviously under the softening action of water. Based on the investigation, in-sire and Lab tests on Malan loess carried out in Utrecht University of Netherlands and Lanzhou of Gansu Province with different methods, the water sensitivity, the hydraulic and shear strength properties of Malan loess were studied. The boundary of the brittle and plastic deformations was found, and some important critical indices of Malan loess were dexeloped.

关 键 词：马兰黄土 试验 水理性质 界限含水率 水敏感性 抗剪强度 特征 

分 类 号：P642.13[天文地球—工程地质学] P694[天文地球—地质矿产勘探]