戈壁地区高速铁路路基填料压缩特性试验研究  

Experimental Study on Compression Characteristics of Subgrade Filling for High-speed Railway in the Gobi Desert

作　　者：陈仕清[1,2] 杨有海[1,2] 

机构地区：[1]兰州交通大学甘肃省道路桥梁与地下工程重点实验室,兰州730070 [2]兰州交通大学土木工程学院,兰州730070

出　　处：《高速铁路技术》2012年第4期1-5,共5页High Speed Railway Technology

基　　金：铁道部科技研究开发计划项目(2009G020-C)

摘　　要：以兰新铁路第二双线新疆境内试验段路基工程为依托,对试验段某里程处填料进行了颗粒分析试验,得到填料的颗粒组成及颗粒级配曲线。通过室内压缩试验,对填料在 2 种含水率、不同压实系数下,进行了压缩特性试验研究。结果表明: 压实系数对戈壁地区粗粒土填料压缩特性有很大的影响; 含水率对填料的压缩特性也有一定的影响; 提高压实系数可以改善填料的水稳定性; 填料的 e - p 关系曲线和沉降变形同含水率及加载次数有很大的关系; 在提高压实系数或反复加载条件下,填料可以获得良好的压缩特性。Based on the embankment engineering of the test sections of the second double-track for Lanzhou-Xinjiang Railway in Xinjiang and with particle analysis test of the filling in a test section, the particle composition and the particle grading curve were obtained. With laboratory compression test, experimental study on compression characteristics of the filling was carried out with two kinds of moisture content and different compaction coefficient. The results of the study show that compaction coefficient greatly influences compression characteristics of the Gobi Desert; moisture content affects compression characteristics of the filling filling of coarse grained soil in the in some degree too ; improving compaction coefficient can improve the water stability of the filling ; there is an important relationship between the e-p relation curves as well as the settlement and deformation of the filling with water content and loading times; under conditions of improved compaction coefficient or repeated load, good compression characteristics can be obtained for the filling.

关 键 词：高速铁路 填料 压缩特性 试验 

分 类 号：U214.11[交通运输工程—道路与铁道工程]