Research on Correlation between the Final Hole Current Value of CFG Piles and Subgrade Settlement in High-Speed Railway
In the industry of high-speed railway(350Km/h)subgrade foundation,CFG pile composite founda-tion treatment is generally adopted.Based on the CFG pile composite foundation treatment project for a rail-way station,this article investigates the impact of the final hole current value on the pile bottom quality through analyzing the pile-forming current value records,settlement deformation monitoring data,current val-ues of different soil layers(current value of the bearing stratum)during drilling,as well as the post-construc-tion bearing capacity of single piles and subgrade settlement deformation observation data.The research finds that the value of the final hole current affects the quality of the pile bottom,thereby influencing the bearing ca-pacity of the composite foundation.The results show that the magnitude of the CFG pile construction current value can reflect the final effect of foundation treatment to a certain extent,which has a significant impact on the pile quality.It can greatly improve the pile quality,effectively enhance the bearing capacity of the single pile foundation,strengthen the bearing capacity of the composite foundation,and reduce post-construction set-tlement.The research results provide theoretical basis and practical guidance for the construction control of CFG piles in high-speed railways,and serve as a useful reference for solving the problem of foundation settle-ment control in high-speed railway construction.
High-speed railwayCFG pile foundationFinal hole current valueFoundation settlement
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