京九线路基压实粉土力学特性的试验  

Mechanics Properties of Compacted Silt on Beijing-Kowloon Railway

作　　者：彭丽云[1] 刘建坤[1] 肖军华[1] 陈立宏[1] 朱瑞龙[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]济南铁路局,济南250001

出　　处：《北京交通大学学报》2007年第4期56-60,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：铁道部科技司基金(2005G012);北京交通大学科技基金资助项目(2005SM034)

摘　　要：针对京九线粉土路基在雨季时常发生病害的现状,采用GDS三轴仪进行室内试验,研究路基病害机理.分析了路基粉土的击实特性,同时研究了压实度和含水量对粉土路基压缩、变形的影响,对粉土应力-应变关系的影响和对其粘聚力、内摩擦角的影响.从微观上解释了粉土路基的不可击实性;得出含水量和压实度是影响粉土路基的关键因素,并提出对粉土路基必须进行击实控制和防排水控制.Based on the situation that diseases often occur in railway subgrade from Beijing to Kowloon in rainy season, several tests on compacted silt were carried out to study the mechanism of those problems. Compaction characters of the silt were studied in this paper and the effect of compacted degree and water content on compression and deformation of subgrade, on the stress and strain curves and on the shear strength parameter cohesion and friction angle were also investigated at the same time. It was found that the microstructure of the silt the silt subgrade. The compacted degree and water seepage. was the critical factor that induced the incompactness of waterproof control measures should be adopted to prevent

关 键 词：击实粉土 抗剪强度参数 三轴试验 含水量 应力-应变关系曲线 

分 类 号：TU441[建筑科学—岩土工程]