DYNAMIC RESPONSE OF COMPOSITE FOUNDATION WITH CFG-PILE IN BEIJING-SHANGHAI HIGH-SPEED RAILWAY
Dynamic numerical simulation had been done to analyze the composite foundation with CFG-pile by pile caps and different stiffness cushion in low subgrade of Beijing-Shanghai high-speed railway. The distributing rules of dynamic stress of ground surface in the horizontal direction, attenuation rules of dynamic stress and dynamic stress ratio between pile and soil in the vertical direction were studied. It showed that the dynamic stress of pile and soil generally attenuates in depth and attenuation of dynamic stress ratio between pile and soil mostly concentrated into the scope of 5 meters beneath the ground. Moreover application of CFG-pile could effectively reduce the dynamic stress of soil and enhance the dynamic stability of subgrade. Rigid cushion comparatively made uniform distribution of dynamic stress on the ground surface, which homogenized the dynamic stress of upper layer. It will be instructive to control design and construction for low subgrade in BeijingShanghai high-speed railway.
CFG-pile dynamic stress dynamic displacement dynamic stress ratio
Jian-Yi Yuan Quan-Mei Gong Shun-Hua Zhou
School of civil engineering, Huangshi Institute of Technology, Hubei 435003, P.R. China Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shan
国际会议
广州
英文
986-991
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）