土石混合介质中石料间隙土压实度剪切波速评价研究  

Evaluation of compactness degree of interval soil in soil-stone mixtures by use of shear-wave velocity

作　　者：张宇辉[1,2] 张献民[2] 程国勇[2] 

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

出　　处：《岩土工程学报》2011年第6期909-915,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(60879021);中国民航局科研基金项目(MHRD07Z11);中央高校基本科研基金项目(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率、不同含石量情况下试件剪切波速对比试验。引入体积膨胀率γV,通过分析γV与细粒土剪切波速及关性模型。结果表明:石料间隙土剪切波速可由混合料宏观剪切波速推定。研究结果将为采用石料间隙土剪切波速评价混合料压实程度测试技术提供依据。The shear-wave velocity variation laws of soil-stone mixtures due to alteration of water content and mass are studied.Comparative laboratory compaction tests on soil and soil-stone samples of sandy soil,silty clay and low liquid-limit clay under different water contents and soil-stone proportions are performed based on percentage of stone.The volume expansion ration（γv） is introduced.The correlation between γv and the shear-wave velocity of the soil and the correlation between γv and the shear-wave velocity of the soil-stone mixtures are analyzed.Thus,a model for the correlation between the shear-wave velocity of interval soil in crushed stone（vs2） and the macro shear-wave velocity of the soil-stone mixture（vs） under different compaction degrees of mixtures is proposed.The results show that vs2 can be derived by means of vs.This conclusion is valuable in compaction degree evaluation of soil-stone mixtures by use of the shear-wave velocity of interval soil in crushed stone.

关 键 词：土石混合介质 剪切波速 石料间隙土 压实度 

分 类 号：TU458[建筑科学—岩土工程]