The Research On The Settlement Controlling Of High-speed Railway Embankment In Collapsible Loess Ground

As China's western development strategy being implemented gradually, the northwest territories will become a large-scale strategic economic development. There will be more and more engineering construction in loess region. The study of roadbed subsidence control technology in collapsible loess areas is particularly important.To build high-speed railway in the collapsible loess region, the settlement of roadbed is a key aspect of control. In recent years at home and abroad, the emergence of pile-supported embankments is a new form of ground treatment and has been made a good effect part of control the settlement in projects. This structure combines the advantages of the vertical and horizontal reinforcement with the small settlement, fast construction, structural stability, low cost. So pile-supported embankments will has great value of promotion in embankment foundation treatment in the high-speed railway.Pile-supported high-speed railway embankment plays prominent role in their process of control settlement which is different from the ordinary rigid pile composite foundation because of rigid piles, pile caps and horizontal reinforcement. This article will get some reference guide and value conclusions for high-speed railway subgrade settlement controlin collapsible loess areas, through finite element method and the use of finite element analysis software MIDAS/GTS on the pile-supported embankment systems numerical simulation, on the basis of the analysis of pile-supported embankment soil arching effect, the method of calculating pile load-sharing ratio, the load-bearing pile behavior and rigid pile composite foundation settlement calculations.