杨凌地区黄土三轴渗透试验研究  

Study on the Triaxial Permeability Test of Yangling Loess

作　　者：李广冬[1] 骆亚生[1] 郭鸿[1] 谭东岳[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《人民黄河》2011年第7期141-143,共3页Yellow River

基　　金：国家自然科学基金资助项目(50578134);教育部新世纪优秀人才支持计划项目(NECT-06-0864)

摘　　要：通过杨凌地区重塑黄土不同干密度下的常规渗透试验和三轴渗透试验,对比分析了围压和干密度对渗透系数的影响,用指数函数对围压和渗透系数的关系曲线进行了拟合,并推导出了饱和黄土干密度与渗透系数的函数关系。结果表明:在同等条件下,随着围压和干密度的增大,渗透系数减小,但其对渗透系数的影响会越来越小;干密度与渗透系数呈指数函数关系。The conventional seepage and the three axle permeability tests are carried on to the remolded loess of the Yangling area using three control dry densities,analyze the influences of confining pressure and dry density on the permeability coefficient contrastively,and have carried on the fitting with the exponential function to the curve between confining pressure and the permeability coefficient,and get the function of dry density and the permeability coefficient about the saturated loess.The results showed that： under the same conditions,with the increase of confining pressure,the permeability coefficient decreases,as the dry density increases,the permeability coefficient is also reduced,and the effect getting smaller.The relationship between dry density and permeability coefficients is the exponential function.

关 键 词：饱和黄土 三轴渗透试验 渗透系数 干密度 杨凌地区 

分 类 号：TU411.4[建筑科学—岩土工程]