几种孔隙比与渗透系数关系的对比  

Comparison among Some Relationships between Permeability and Void Ratio

作　　者：邓永锋[1] 刘松玉[1] 章定文[1] 徐海波[1] 

机构地区：[1]东南大学交通学院岩土工程研究所,江苏南京210096

出　　处：《西北地震学报》2011年第B08期64-66,76,共4页Northwestern Seismological Journal

基　　金：国家自然科学基金(50908049)

摘　　要：渗透系数是描述土体渗流和固结的基本参数。大量研究实践表明渗透系数与土体的上覆有效应力和孔隙比有相关性,尤其是孔隙比;并提出了多种渗透系数与孔隙比间的经验关系。本文分析表明多种经验关系均可转换到log k-e坐标中,在该坐标中渗透系数与孔隙比呈直线关系,其斜率Ck均为初始孔隙比e0的函数。后续研究对比了各种Ck与e0的关系。Permeability（Hydraulic conductivity） is a basic parameter,used to describe seepage and consolidation of soil.Presently,large numbers of research show that there are consistent connections between permeability and effective volumetric stress,especially and void ratio.Thereafter,some emprirical relationships between permeability and void ratio were proposed.In this paper,the relationships are transformed to the log k – e coordinates.It is found that ？log k linearly increase with ？e,and all the ratio Ck of ？log k to ？e are function of initial void ratio e0.Meanwhile,the Ck functions of the transformed experimental expressions are compared.

关 键 词：土体 渗透系数 孔隙比 经验关系 logk-e坐标 

分 类 号：TU441[建筑科学—岩土工程]