NUMERICAL SIMULATION ON THE SETTLEMENT OF CFG PILES COMPOSITE FOUNDATION

摘要

The high-speed railway has already been the important part of the traffic network in China.The technique of CFG pile composite foundation has been used widely.This paper focuses on the settlement factors of CFG pile composite foundation based on the project of Wuhan-Guangzhou High-speed Railway.The numerical simulation is established models by FLAC-3D.Different parameters are selected so as to achieve different and precise results, such as pile length, pile space, pile modulus, cushion modulus, cushion thickness, etc.All the results eventually draw a conclusion that optimal parameters can be got on CFG pile composite foundation to reinforce the functions of the subgrade foundation.Therefore it has instructive significance to the settlement prediction of Wuhan-Guangzhou High-speed Railway, and offers a reference value to the prediction of settlement.