Analysis of the Effect of Groundwater Exploitation on High-Speed Railway Pile-Slab Structure Subgrade

Ren Zhenxing*, Hong Xiao, Xiao Guo, Luwei Huang
Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, 100044, Beijing, P.R. China.

© 2015 Xiao et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Land settlement produced by groundwater exploitation may cause larger deformation of the high-speed subgrade. To meet the settlement control requirements after construction of the high standard of high-speed railway subgrade, Pile-Slab composite foundation treatment technology keeps developing and applying in high-speed railway construction. However, the settlement deformation calculation theory of Pile-Slab composite foundation is not mature, in particular, the research for Pile-Slab composite foundation deformation caused by groundwater exploitation is seldom, which is far behind the requirements of engineering practice. To study the effect of exploiting groundwater near the highspeed railway on Pile-Slab composite foundation deformation, in this paper, we establish 3D fluid-solid coupling model using ABAQUS, analyze the effect of different groundwater exploiting quantities on high-speed railway subgrade when CFG piles are used to strengthen the foundation, and compare to the result with no CFG piles. The analysis shows that in the condition of pumping water, CFG Pile-Slab composite foundation has a significant effect on decreasing subgrade lateral deformation and settlement which are reduced by 70%.

Keywords: 3D fluid-solid coupling model, CFG piles, groundwater exploitation, subgrade settlement.