孔隙度对黏性土渗透系数影响的试验研究  

Experimental Research on the Influence of Porosity on Permeability Coefficient of Clay Soil

作　　者：杨忠翰 李明宝[1] 张旭[1] YANG Zhong-han;LI Ming-bao;ZHANG Xu(College of Civil Engineering,Northeast Forestry University,Harbin,150040,China)

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040

出　　处：《科学技术与工程》2020年第3期1152-1156,共5页Science Technology and Engineering

基　　金：中央高校创新团队持续发展专项基金(2572017ET04);哈尔滨市优秀学科带头人基金(2013RFXXJ033)。

摘　　要：利用传统渗透系数经验公式计算黏性土渗透系数时,计算结果与黏性土渗透试验实测数据常存在一定的误差,对实际工程建设加固与修复产生较大影响。为修正此误差,选取两种不同的黏性土制成干密度不同的试样,结合变水头渗透试验研究黏性土孔隙比对渗透系数的影响,拟合黏性土孔隙比与渗透系数之间的函数关系,并分析讨论了传统渗透系数经验公式计算黏性土时误差较大的原因。研究成果符合黏性土的渗透规律,为工程防渗及地基沉降提供了参考。When the traditional empirical formula of permeability coefficient is used to calculate the permeability coefficient of clayey soil,there are always certain errors between the calculated results and the measured data of clayey soil permeability test,which have great influence on the reinforcement and repair of actual engineering construction.To correct this error,two types of clay are selected to make samples,which combine with experiments on permeability coefficient of variable sources to study the effect on void ratio of clay on permeability coefficient and fit the functional relation between void ratio of clay and permeability coefficient.Furthermore,the reasons for distinct errors in calculating clay by traditional empirical formula of permeability coefficient are discussed.The research achievement accords with the rule of clay permeability,providing a reference for engineering seepage control and foundation settlement.

关 键 词：黏性土 渗透试验 渗透系数 干密度 孔隙度 

分 类 号：TU411[建筑科学—岩土工程]