高填方土石混合材料剪切波速含石量因素分析  

Analysis of Factors of Mass Percent of Stone in Research on Shear-Wave Velocity of High Filled Soil-Stone Mixture

作　　者：张宇辉[1,2] 张献民[2] 

机构地区：[1]南京航空航天大学民航学院,南京市210016 [2]中国民航大学机场工程与管理学院,天津市300300

出　　处：《公路》2011年第4期69-73,共5页Highway

基　　金：国家自然科学基金资助项目;项目编号60879021;中国民航局科研基金资助项目;项目编号MHRD07Z11;中央高校基本科研基金资助项目;项目编号ZXH2009D019

摘　　要：采用室内重型击实试验的方法,分别对砂土、粉质黏土、低液限黏性土3种土样的纯土试件和土石混合试件进行了不同含水量、不同含石量情况下试件剪切波速对比试验,研究了土石混合试件在密度一定条件下混合料宏观剪切波速及石料间隙土表征剪切波速随含石量的变化规律,分析了含石量对剪切波速影响的机理。大量试验结果表明,含石量与土石混合介质的剪切波速存在显著的相关性。同时这种相关性随含水率的变化而波动,含水率对混合料剪切波速的影响随含石量的增大而减小。研究结果将为土石混合料间隙土剪切波速测试模型提供依据。To study the shear-wave velocity variation law of soil-stone mixtures due to alteration of water content and mass percent of stone,by using sandy soil,silty clay and low liquid-limit clay,comparative laboratory compaction test is conducted under the condition of different water content and different soil-stone proportion.The change regulation of the macro shear-wave velocity of the soil-stone mixture is analyzed and the shear-wave velocity of interval soil in crushed stone with the mass percent of stone changed under the density of soil-stone mixture is unchanged.The effect mechanism of mass percent of stone on the shear wave velocity is revealed.The results show that the mass percent of stone is related strongly to the shear wave velocity of mixture,and this correlation changes with water content change.The effect of water content on shear wave velocity of soil-stone mixture decreases along with the mass percent of stone increased.This conclusion is valuable in compaction degree evaluation of soil-stone mixture by the shear-wave velocity of interval soil in crushed stone.

关 键 词：土石混合介质 剪切波速 含石量 石料间隙土 

分 类 号：U416.1[交通运输工程—道路与铁道工程] TU459.3[建筑科学—岩土工程]