Title: Modelling of chemical grout column permeated by water in transparent soil

Authors: Yue Gao; Wang-Hua Sui

Addresses: School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China ' School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China

Abstract: The process of injecting chemical grout into cohesionless soil and its permeation by water are simulated by using a transparent soil model and a finite element model (FEM). The urea-formaldehyde resin is used as the grouting material in the transparent soil modelling. Two black and white charge-coupled device cameras are mounted in an orthogonal position to provide a three dimensional view of the groundwater-grout interface. The groundwater-grout interface is primarily influenced by the advection of the flowing water with increasing distance from the injection point owing to the reduction in the grouting pressure. An equation based on fluid dynamics in porous media and Darcy's law is then proposed to predict the displacement of the groundwater-grout interface in flowing water. A numerical model based on the FEM is also developed to simulate this process. The numerical simulation results are found to match the physical modelling well.

Keywords: transparent soil; chemical grouting; grout column; flowing water; modelling; finite element method; FEM; urea-formaldehyde resin; fluid dynamics; porous media; Darcy's law; groundwater-grout interface; numerical simulation.

DOI: 10.1504/IJEP.2016.079906

International Journal of Environment and Pollution, 2016 Vol.59 No.2/3/4, pp.142 - 155

Available online: 18 Oct 2016 *

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