Analysis And Control Technology Research Of Railway Subgrade Frost Damage In Seasonal Frozen Soil Region

The roadbed frost damage is one of the more common diseases in the cold zone railway.It not only make the line geometry size changes,increase maintenance workload and maintenance cost,but also seriously affect the traffic order of railway transportation,and even endanger the safety.For the realignment of subgrade frost damage railway administration needs to spend a lot of money every year.But it is difficult to use the usual methods of regulation to solve the problem of transporting traffic,such as LanXinXian.Therefore,in this paper,on the basis of predecessors'research results,in the engineering background of an railway roadbed disease,investigating and analyzing frost damage mechanism and influence factors of designing new subgrade frost damage renovation project,for the correct selection of seasonal frozen soil area railway subgrade frost damage control measures to provide the reference.The main content is as follows:(1)By analyzing the characteristics of the commonly used several kinds of subgrade frost damage regulation measure,draw the conclusion:if you want to complete the subgrade frost damage regulation,as long as according to the actual situation,choose the corresponding control measures.But in the case of a busy trunk,the usual remedies often struggle to achieve the desired results.Therefore,it is necessary to study according to the specific situation and propose new measures for the improvement of the cold.(2)Taking lanxin railway as an example,the investigation and analysis showed that the problem of soil quality was the main cause of the frost damage in lanxin road.If only from the view point of improved soil,change fill subgrade frost damage is the most thorough regulation measures,but it is difficult to achieve in transportation on the busy LanXinXian.Therefore,the three kinds of frost damage control measures were designed,such as closed roadbed,drainage hole and water wall,and drainage wall.(3)Through theoretical analysis and field test,analysis of geomembrane,respectively,subgrade drainage scupper and water seepage wall+drainage scupper three frost damage control measures of the working mechanism and the treatment effect,to sum up the experiences of subgrade frost damage regulation and provide reference for other seasonal frozen cold injury.To sum up,this paper takes an railway as the background,from the mechanism of subgrade frost heaving,the causes of subgrade frost damage,the subgrade frost damage regulation in seasonal frozen soil region analysis and research,engineering design three kinds of new regulation measures,and the regulation effect evaluation,provide reference for in seasonal frozen railway subgrade frost damage regulation.