Permeation grouting introduces cement or chemical-based grout into soil pores without an essential change in the original soil volume and structure, changing the support capability of granular soils without disturbing them.
how it works:
Permeation grouting fills voids in the soil with chemical solutions. It permeates the ground, turning it into a solid mass.
why you need it:
Permeation grouting is commonly used in granular soils with fine sand content to stiffen the ground and prevent excessive movement, to lower the permeability of the soil to prevent excessive water inflows, and to underpin adjacent buildings and other facilities in advance of the tunnel excavation.