含水量对土石混合介质剪切波传播速度的影响分析  

Study of Influence of Water Content on Shear Wave Velocity of Soil-stone Mixture

作　　者：张献民[1] 庄旭瑞[1] 张宇辉 邱鹏炼[1] 

机构地区：[1]中国民航大学交通学院,天津300300 [2]南京航宅航天大学,江苏南京210016

出　　处：《公路交通科技》2010年第12期16-20,共5页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(60879021)

摘　　要：采用室内重型击实试验的方法,分别对低液限粘土、粉质粘土、砂土的纯土试件和土石混合试件进行了不同含水量、不同含石量情况下的剪切波速对比试验。研究了纯土试件在密度一定的条件下试件剪切波速随含水率的变化规律,同时分析了纯土试件含水量对剪切波速影响的机理。大量试验结果表明,土体的含水量与土石混合介质的剪切波速存在显著的相关性,即剪切波速随含水量的增加而减少,同时在土石混合料中这种相关性随着含石量的增大而逐步减弱。研究结果将为土石混合料压实质量剪切波速测试分析技术提供理论依据。The contrast of shear wave velocities of plain soil and soil-stone mixture specimens was carried out through indoor compaction test of low liquid-limit clay,silt clay and sandy soil with different water contents and stone contents.The regulation of shear wave velocity of plain soil specimen with given density changing with water content was analyzed to find out the effect mechanism of water content on shear wave velocity.The test result indicates that the water content of soil is related strongly to the shear wave velocity of soil-stone mixture（shear wave velocity decreases with the increase of water content）,and this correlation decreases along with the increase of stone content.The test result could be a reference for detecting the compaction quality of soil-stone mixtures concerned with shear wave velocity.

关 键 词：道路工程 土石混合介质 室内试验 剪切波速 含水量 

分 类 号：U414.11[交通运输工程—道路与铁道工程]