Study on the Mechanism of High-Pressure Jet Grouting Based on Computational Fluid Dynamics

Abstract

High-pressure jet grouting (HPJG) is an effective method to reinforce soil mass and to prevent seepage in the practical engineering. It has been used in the different fields for many years, and achieved the significant social and economic benefits. In this study, the processes and mechanisms of HPJG are discussed based on the computational fluid dynamics (CFD). The related results show that it is a good way to reveal the processes and mechanisms of HPJG. Using the suitable injection pressure and flow rate, nozzle structure and velocity of nozzle movement are the effective ways to increase the working efficiency of HPJG. Moreover, the effects of impacting, cutting, mixing, lifting, replacing, filling, extrusion, permeation, concretion, displacement and packing are the main mechanisms of HPJG.