大秦重载铁路路基基床表层静力学性能及状态

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.

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

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.