山西省黄土回弹模量影响因素的试验分析  

Test and Analysis of Influence Factors for Resilient Modulus of Loess in Shanxi Province

作　　者：段丹军[1] 

机构地区：[1]山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室,太原市030006

出　　处：《公路》2014年第3期139-144,共6页Highway

基　　金：西部交通建设科技项目;项目编号2008 318 000 99;山西省交通运输厅科研计划项目;项目编号09-1-02

摘　　要：在山西省由北向南选取典型路基土样做颗分、不同含水率和不同压实度回弹模量试验，分析了含水率、压实度、黏粒含量对回弹模量的影响。结果表明：含水率、压实度对路基土回弹模量的影响很大，对于细粒土来说，黏粒含量也是影响回弹模量的主要因素之一，黏粒含量越多路基土回弹模量值越大。山西省典型路基土样在最佳含水率、100％压实度情况下的回弹模量值由北向南逐渐增加，山西省晋北地区细粒土黏粒含量范围为0％～10％，最佳含水率最大密实度状态下回弹模量值约为40～60MPa；晋南地区细粒土黏粒含量范围为10％～30％，回弹模量值约为80～100MPa。Resilient modulus tests of particle size analysis, different compactness and different water content have been conducted for typical subgrade soil in Shanxi Province from north to south, and the influence Of water content, compactness and clay content to resilient modulus are analyzed. It is shown that both water content and compactness greatly affect resilient modulus, and for fine-grained soil, clay content is the main influence factor. The higher clay content, the bigger resilient modulus is. With the optimum moisture content and 100% compactness, resilient modulus of typical subgrade soil increases gradually from north to south in Shanxi Province. Range of fine-grained soil clay content is respectively 0~10% and 10~30% in north and south Shanxi Province and value of resilient modulus is approximately 40~60 MPa and 80~100 MPa respectively for northern and southern Shanxi Province.

关 键 词：细粒土 含水率 压实度 黏粒含量 回弹模量 

分 类 号：U416.03[交通运输工程—道路与铁道工程]