Performance evaluation methods for chemical injection methods considering soil permeability and chemical rheology

The chemical injection method is one of the ground improvement methods used to stop water and increase strength. It is essential for soft ground improvement. Although the chemical injection method is a proven technique, it still faces technical challenges. The improved area and strength are generally non-uniform because the area to be improved cannot be controlled artificially due to the nature of the method. This study aims to identify and evaluate three causes of infiltration behavior. Firstly, the effects of different viscosities of various types of chemicals and different ground permeability on chemical infiltration behavior were evaluated through infiltration flow analysis. Secondly, the effects of ground uncertainty on infiltration behavior were assessed through infiltration flow analysis and Monte Carlo simulation. Lastly, the influence of rheological properties of the chemical solution on infiltration behavior was evaluated using a coupled MPS-DEM analysis. By presenting these three evaluation procedures, this study proposes a new method to evaluate the performance of chemical injection methods.