The Search Of Subgrade Of Lanzhou-Xinjiang Railway About The Affecting Factors And Renovate Measures

In seasonal regions, the main problems existed in the seasonal region is the frozen injury. the frozen injury also affects railway technical indexes and driving stability. Especially the roadbed of the seasonal seasonal regions, will as seasonal change and recurring frost heaving and thaw phenomenon, susceptible to non-uniform frost heaving, leading to the subgrade rugged, influencing driving safety seriously.The seasonal frost heaving characteristics was introduceed and discussed in this paper. The mechanism of frost heave of soil was emphasisly discoursed, namely moisture migration is the main cause for freezing expansion. And the main characteristics of frost heaving was introduced,the frozen bilge rate is the main index. meanwhile,the frozen bilge rate as a division, mainly basised on the classification of soil frost heaving level in China. lanzhou-xinjiang railway subgrade as background of the paper, combining geographic position and weather conditions of lanzhou-xinjiang railway, basising on these situation, this paper was firstly analyzed the main factors of soil, water, temperature influencing regularity of the frost heave. Secondly, to frost heaving obvious section of LanXin railway K411 K413 subgrade soil samples, and a lot of indoor substation。This paper is mainly on the basis of previous work on railway ballast situation of lanzhou-xinjiang railway track test analysis, in order to determine the influence of railway frost, a hydraulic test track the size and roadbed freezing expansion.From the main factors of influence lanzhou-xinjiang railway, according to the basic principles and adjustment of the current domestic success experience, two Renovate Measures were used about the the frozen injury. LanXin railway, mainly geomembrane closed and the well-precipitation osculum group of governance measures.The frozen injury of road bed is the mainly the provenance of lanzhou-xinjiang railway track, the major reason of the frozen injury mainly due to excessive moisture content in excess.This paper based on the actual operation situation of lanzhou-xinjiang railway track, and recommends the frost should mainly on clear screen and doing well track every drainage.The basis was provided by road bed laboratory result of lanzhou-xinjiang railway Renovate.regulation methods of railway frost heaving had great effect, these results will provided protection for LanXin railway speed trains and a railway operational security.