Research On Deformation Control About Subgrade Of High Speed Railway

With the continuous increase of China’s high-speed railway operating mileage, high-speed railway subgrade deformation control is always a major issue in the design, construction and operation and maintenance of the unit. Therefore, it is of great pra ctical significance to study the deformation control of high speed railway subgrade and analyze the treatment method of subgrade deformation, which is of great practical significance to the design, construction and operation maintenance management of high speed railway subgrade engineering.This paper mainly by Westermann designed based on the construction period and operation period how to control and high-speed railway subgrade deformation processing. The high-speed railway construction period, the foundation treatment design and construction, in the roadbed and bridge abutment, roadbed and the horizontal structures of transition section take the gradually reduce the subgrade settlement, by replacement, impact compaction, of collapsible loess foundation compaction pile method, CFG pile, prestressed concrete pipe pile and Heaped Load Preloading etc. method of compacting, soft soil foundation and high fill subgrade in different types of foundation reinforcement. High speed railway operation and maintenance period, high-speed railway subgrade settlement after, when the foundation deformation, generally of foundation by grouting and high pressure jet grouting reinforcement method; when the for transition section settlement or subgrade reasons. In general, the grouting reinforcement method of filling body; when the roadbed stable settlement and settl ement beyond fastening systems to adjust the maximum volume can be used non ba llasted track structure grouting(glue) uplift of the ballastless track settlement of the disease.With Atlantic high iron operation period of ballastless track subgrade settlement of the disease, in the subgrade settlement of smaller amount of ballast section office can take up system of fastener ballast tamping and adjustment of a combination of methods to deal with the disease. By processing the high iron Yongji station Atlantic ballastless track settlement diseases, when the roadbed stable settlement and settl ement beyond fastening systems to adjust the maximum volume can be used non ballasted track structure grouting(glue) uplift of the combined adjustment of fastener system method to deal with Ballastless Track sink down the disease. By processing the Atlantic high iron to the hair line subgrade settlement and bridge abutment cone and the embankment settlement disease, caused by the reasons for subgrade filling subgrade settlement, and the settlement amount is large, the use of roadbed grouting reinforcement method to deal with diseases of subgrade settlement.