铁路路基戈壁土填料物理力学特性试验研究  

Experimental Study on Physical and Mechanical Properties of Gobi Desert Soil Filling of Railway Subgrade

作　　者：周党伟 陈仕清[2] 杨有海[2] 

机构地区：[1]中铁七局集团有限公司,河南郑州450016 [2]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《交通标准化》2012年第17期8-12,共5页Communications Standardization

摘　　要：对取自兰新铁路第二双线路基试验段某工点的填料,开展颗粒分析、重型击实、大型直剪以及大型压缩试验等土工试验。研究结果表明:填料级配不良主要受曲率系数Cc控制;增大压实系数,可以提高填料的抗剪强度指标和压缩指标;含水率对填料的抗剪强度特性和压缩特性均有一定的影响;增加加载次数,可以提高填料的压缩指标效果。结论可为戈壁土填料在高速铁路路基工程中的应用提供参考及依据。Based on the embankment engineering of the test sections of the second doubletrack for LanzhouXinjiang Railway, particle analysis tests, heavy compaction tests, largesize shear tests, largesize com pression tests of the Gobi desert soil filling in a site of the test sections were made. The results show that the bad gradation of the filling is mainly controlled by the curvature coefficient C,.; increasing the compaction coefficient （：an improve shear strength parameters and compression index of the filling; moisture content affects shear strength and compression characteristics of the filling in some degree; increasing the loading times can improve compression index effect of the filling. It can provide the basis and reference for the actual application of Gobi desert soil filling in subgrade for highspeed railway.

关 键 词：路基 戈壁土 填料 抗剪强度 压缩特性 

分 类 号：U213.14[交通运输工程—道路与铁道工程]