摘要
基于非饱和土渗透系数与其强度相关的特性,将黄土视为非饱和土,分析研究不同压密状况对其渗透系数的影响规律。在试样土体初始含水量相同的情况下,采用水气运动联合测试仪进行渗透试验,测定5种不同干密度试样土体的渗透系数。试验研究证明,试样土体干密度不同,其渗气系数变化趋势相同;干密度的变化对土体渗气、渗水系数的影响较大,土体渗气系数和渗水系数均随干密度增大而减小;土体干密度减小,渗水系数随渗气系数的增大而增大。
Based on the correlation between intensity of unsaturated soil and its permeability coefficients, regard loess as unsaturated soil, this paper studies the influence laws of permeability coefficient at different compaction effort. At the same initial water content of test sample, it used water-air combined sensor to testing permeability coefficients, and the permeability coefficients of five different dry density loess test sample have been obtained. Results of test study proved that, different dry density; the variation tendencies are same. Variation of dry density influence the permeability air coefficient and permeability water coefficient of loess test sample obviously. Dry density is increasing, permeability coefficients are decreased ; when it decreases, permeability water coefficient is same increasing as permeability air coefficient.
出处
《公路工程》
2009年第6期130-134,143,共6页
Highway Engineering
关键词
道路工程
黄土
压密状况
渗透系数
试验研究
road engineering
unsaturated loess
compaction effort
permeability coefficient
test study
