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击实非饱和黏土电阻率特征实验研究

发表时间:2008-01-15  浏览量:1564  下载量:668
全部作者: 李方
作者单位: 河海大学土木工程学院
摘 要: 本文主要通过实验手段来研究击实土样的电阻率特性、电阻率的影响因素及其与土体物理性质指标的关系。土样击实后含水率对电阻率的影响为:在含水率较低时,电阻率随含水率的增加而降低,但含水率超过一定数值(22%)后影响程度较低;饱和度的影响是:随着饱和度的增加,电阻率降低;孔隙率和干密度的影响是:随着它们的增加达到一定值(100 Ω·m)后呈减小趋势;随着土样密度的增大电阻率减小;随着无侧限抗压强度的增加先平缓直线增加,当无侧限抗压强度增加到120 kPa后呈指数上升,可用两条曲线拟合得到电阻率与无侧限抗压强度之间的关系。
关 键 词: 勘探地球物理;电阻率;实验;击实黏土
Title: Electrical Resistivity of Compacted Unsaturated Clay by Experiment Study
Author: LI Fang
Organization: Department of Geological and Geotechnical Engineering,Hohai University
Abstract: This paper studied the electrical resistivity characteristics after compaction, and the influence factors of resistivity, The relationship between resistivity and other physical properties are studied too. The relationship between resistivity and water content of soil samples after compaction are that the resistivity decreased when the water content increased, but the influence degree became small when water content reach to about 22%. The resistivity decreased with the water saturation increased. The influence of the porosity ratio and dry density to resistivity are that the resistivity increased to about 100Ω·m, then decreased with the increase of porosity ratio and dry density, the resistivity increase when the density decrease. The relationship between unconfined compression strength and electrical resistivity are that the resistivity gentle increase when the unconfined compression strength increased, when the unconfined compression strength increase to about 120kPa ,the resistivity increase as exponential curve.the relationship can use two different curve to fitting them ,the first one is liner, the second one is exponential curve.
Key words: exploration geophysics; electrical resistivity; experiment; compaction clay
发表期数: 2008年5月第1期
引用格式: 李方. 击实非饱和黏土电阻率特征实验研究[J]. 中国科技论文在线精品论文,2008,1(1):110-114.
 
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