大秦重载铁路路基基床表层静力学性能及状态  

Study on the static properties of surface layer of subgrade bed and state analysis in Daqin heavy-haul railway

作　　者：葛宝金[1] 王连俊[1] 李丹枫[1] 李懿[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2014年第4期143-147,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家"863"计划项目资助(2009AA11Z102_1)

摘　　要：通过对大秦铁路路基茶坞和大同3个典型断面地基系数K30、变形模量EV2和压实度K等静力学参数的测试,评价了大秦铁路路基在运营期的工作状态,分析了重载铁路路基静力学参数的变化规律,研究了重载线路中地基系数、压实度与变形模量之间的内在联系.研究表明:茶坞路桥过渡段路基压实质量优于大同过渡段路基;三断面近桥位置土体承载能力均高于远桥位置;地基系数K30和二次变形模量EV2具有同时增大或减小的变化规律;压实度K随着EV2/EV1值的增大而减小,计算得出二者的线性回归方程,其线性相关性较高.By the mean of research on the in-situ test of statics properties-foundation coefficient K30, deformation modulus Ev2 and compaction degrees K on three typical subgrade sections, which are situ- ated in Chawu and Datong separately, this paper gives evaluations for the properties of Daqin subgrade, analyzes the laws of variation of statics properties in heavy-haul railway, studies the relation between foundation coefficient K30 and deformation modulus Eva in heavy-haul railway. The conclusions show that the compaction quality of subgrade in Chawu is better than that in Datong; the quality of subgrade near the bridge is better than the subgrade away from the bridge in the three typical subgrade sections; foundation coefficient K30 and deformation modulus Eva increase or decrease simultaneous;compaction degrees K and Ev2/Ev1 have the contrary law of variation, calculate the linear regression equation of them, and the linear dependence relation is well.

关 键 词：重载铁路 基床表层 静力学性能 地基系数 压实度 变形模量 

分 类 号：U239.4[交通运输工程—道路与铁道工程]