Mechanism and Effects of Reinforcement of Embankment of High-Speed Railway in Operation

Abstract

The soft foundation of some subgrade of high-speed railway in operation occurred abnormal settlement, need to reinforcement, however, the reinforcement measures and these mechanism have got little attention. Numerical analysis method was adopted to study the mechanism and effects of the grounting and churning pile which was used to reinforce soft soil subgrade a high-speed railway. Results shows that the settlement and lateral deformation are not symmetrical distribution but get larger along the inclined direction of stratum, reinforcement by grouting can decrease the settlement and the transverse differential deformation by improving the properties of soil, which can decrease the void ratio and increase the compression modulus; reinforcement by churning pile which can increase the stability of embankment on soft soil subgrade. The result could provide theoretical guidance for reinforcement of