Residual stresses at the pile pit during pressure grouting are studied theoretically based on the solutions of expansion of spherical cavity and one-dimensional consolidation. By analyzing of the dissipation process of residual stresses

the analytical solutions of residual stresses dissipation with time and diffusion radius are obtained for assumed initial exponential pore pressure distribution. Also

a simplified solution discarding effect of grout spread radius is compared with the present method for different relative parameters. Parametric studies show that rheological index

consistency index

compression modulus and consolidation time are the key issues affecting pile residual stresses. In addition

the validity of the proposed model is tested by comparing the results from field measurements. This research is great important for the theoretical studies and practical applications of the residual stresses.