软土渗透各向异性特性及其微观机理研究  

STUDY ON THE PERMEABILITY ANISOTROPY AND MICROSCOPIC MECHANISM OF SOFT SOIL

作　　者：胡浩[1,2] 周建[1,2] 张晓[1,2] 蒋熠诚 HU Hao;ZHOU Jian;ZHANG Xiao;JIANG Yicheng(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Zhejiang Urban Underground Space Development Engineering Research Center,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,杭州310058 [2]浙江大学,浙江省城市地下空间开发工程技术研究中心,杭州310058

出　　处：《低温建筑技术》2021年第6期101-105,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金重点项目(51338009);国家重点研发课题(2016YFC0800203)。

摘　　要：为探究原状软土渗透各向异性特性的机理,文中基于GDS渗透仪对杭州原状软黏土开展一系列渗透试验,并将完成渗透试验的土样进行微观观测与分析。得到了杭州软土渗透各向异性随固结压力的变化规律,并分析了软土在不同观测方向上微观孔隙结构的差异及其随固结压力的变化,发现从微观角度解释渗透各向异性更为合理。In order to explore the mechanism of the permeability anisotropy of the undisturbed soft soil, a series of permeability tests were carried out on unmodified soft clay in Hangzhou based on GDS permeation apparatus, and microscopic observation and analysis were carried out on the soil samples completed in the permeability tests. The variation law of permeability anisotropy with consolidation pressure of Hangzhou soft soil is obtained, and the difference of microscopic pore structure and its variation with consolidation pressure of soft soil in different observation directions are analyzed. It is found that it is more reasonable to explain permeability anisotropy from microscopic perspective.

关 键 词：渗透系数 渗透各向异性 原状软土 微观分析 孔隙面积 

分 类 号：TU411.4[建筑科学—岩土工程]