Research methods: Soft soil foundation reinforced with dry jet mixing pile and crushed stone pile are research subject in this paper. By comparing the theoretical calculation and monitoring data, the subgrade design methods are corrected and developed.
Research conclusion: It is feasible and economic that the soft soil foundation of Suining-Chongqing railway is treated With dry jet mixing pile and crushed stone pile. Passenger dedicated railway railways which targeted speed is 200 km/h and higher than 200 km/h is should be designed according to the settlement after construction. Total settlement of the soft soil foundation treated with dry jet mixing pile and crushed stone pile is made up mainly by the settlement occurred in the course of construction. The rate of settlement of compound foundation achieve maximum value half a year after construction, and then it decreased.
2007, Vol. 24 
