Prediction of Grouting Penetration Height Along the Shaft of Base Grouted Pile

Abstract

Post-pressure grouting is an effective method to improve bearing capacity of ordinary bored cast-in-situ piles. The migration of the grout along the pile side is regarded as an important mechanism responsible for the improvement of the pile capacity. Research into the penetration height of the grout is of great important in evaluating the behavior of base grouted piles. In this paper, a prediction method of grouting penetration height along the shaft of the base grouted pile was proposed. Considering the balance and losses of the grout pressure during grouting, an iterative procedure was given to determine the penetration height of the grout in layered soils. Field test results were also provided to indicate the validity of the proposed method.

Theoretical Research on Grouting in Deep Loose Layers Based on the Cylindrical Diffusion Model of Radial Tube Flow

“…The slurry flow patterns of Newtonian, Bingham, and power-law fluids have been investigated. The established diffusion models mainly include the spherical, cylindrical, and cylindrical-hemispherical models [11][12][13][14]. Regarding compaction grouting, the fluid-solid coupling effect between the slurry and soil is mainly studied in combination with the theories of ball hole expansion or column hole expansion and soil nonlinear compaction.…”