An analysis method for the response of combined side-and-tip grouting pile

Post-grouting technology is widely used to increase the ultimate bearing capacity and decrease the settlement of bored piles. The post-grouting pile is designed according to double control criterion of bearing capacity and settlement, and there is a need to get an accurate load-settlement relationship of post-grouting pile. To get a better understanding on the response of combined side-and-tip grouting pile, the load transfer model of the combined side-and-tip grouting pile considering time-varying characteristics of slurry viscosity was established, and an iterative algorithm for the analysis on the load-settlement relationship of the combined side-and-tip grouting pile in layered soils was proposed in this paper. Comparisons between measured and computed results of three well-documented cases were made to verify the reliability of the calculation method. Furthermore, a parameter study was carried out to assess the influence of pile length, pile diameter and grouting parameters on the load-settlement relationship of single piles with different grouting types.

Automated summary

Post-grouting technology is commonly used to enhance the ultimate bearing capacity and reduce the settlement of bored piles. A load transfer model considering the time-varying characteristics of slurry viscosity was established for the analysis of the combined side-and-tip grouting pile in layered soils. The reliability of the calculation method was validated through comparisons between measured and computed results of well-documented cases, and a parameter study was conducted to assess the influence of various factors on the load-settlement relationship of single piles with different grouting types.