饱和黏土非达西渗透特性试验研究  

Experimental Study on Non-darcy Permeability Characteristics of Saturated Clays

作　　者：孙丽云[1] 乐金朝[1] 张杰[2] 

机构地区：[1]郑州大学水利与环境学院,河南郑州450001 [2]郑州大学土木工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2010年第6期31-34,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省教育厅自然科学研究计划项目(2010B560015);河南高速公路发展有限责任公司科技项目(2007GF009)

摘　　要：利用改造过的渗透固结仪,通过交叉,进行固结试验和渗透试验,对河南某地饱和黏土在不同固结压力下的渗透规律进行了研究.试验证明,该种饱和黏土中的渗流存在偏离Darcy定律的现象,并可用Hansbo的非线性分段模型来描述.试验结果表明,黏土渗透性与孔隙比呈非线性关系,黏土渗透性随固结压力增加呈现非线性减小.在此基础上分析了相关渗透参数与孔隙比之间的关系.Based on the consolidation and permeability tests of saturated clays in Henan,the permeability of clays under different consolidation pressures are systematically investigated by using the modified osmotic oedometer.Experiments prove that the flow in this soil does not obey Darcy＇s flow and it can be described by the two-section model of Hansbo＇s.Experiment results show that permeability and void ration of clay are nonlinear relationship,and the permeability of Henan clays decreases nonlinearly with consolidation pressure increasing.Then the relations of the void ratio and the flow parameters are analyzed.

关 键 词：非达西渗流 渗透性 饱和黏土 非线性 

分 类 号：TU431[建筑科学—岩土工程]