عليرضا حمزه نژادارشاد

Jet grouting is a widely applied ground improvement technique in which high-pressure cementitious slurry is injected into the subsurface to form soil–cement columns. Accurate prediction of the geometry an‎d performance of these columns remains challenging due to the highly non-linear fluid–soil interactions, non-Newtonian rheology of the grout, an‎d complex erosion–mixing mechanisms involved. In this research, the jet grouting process is numerically investigated using Particleworks, which employs the Moving Particle Semi-implicit (MPS) method. The study systematically examines the influence of critical operational an‎d geotechnical parameters, namely grout jet velocity, nozzle rotation speed, overburden stress, soil internal friction angle, soil cohesion, an‎d the interaction of successive injection stages, on the diameter an‎d morphology of jet-grouted columns. A series of parametric numerical simulations were conducted, an‎d key performance indicators such as mean column diameter at different depths, radial distribution profiles, an‎d geometric uniformity indices were eva‎luated. The results reveal that increasing injection pressure an‎d jet velocity, combined enhances column enlargement, whereas higher shear strength an‎d cohesion of the surrounding soil tend to constrain grout penetration an‎d mixing. Furthermore, nozzle rotation improved radial uniformity up to an optimal threshold, while sequencing an‎d overlap of injection stages significantly affected column continuity an‎d structural integrity. The findings highlight that particle-based numerical modeling provides a robust framework for elucidating the governing mechanisms an‎d optimizing design parameters of jet grouting in practical engineering applications.

شبيه سازي فاقد شبكه بندي , تزريق پرفشار

particle-based numerical simulation , jetgrouting

alireza hamzeh nezhad ershad

dr mohsen sabermahani