Q. Show the Grout curtain around excavation?

When excavation work is performed in grounds with highly permeable soils, other than installation of well points to lower down groundwater table, consideration can be given to the injection of grout to the soils. The purpose of injection of grout is to fill pore spaces and cavities of soils with grout and to decrease the permeability of soils. The method of grouting is effective in coarse soils however not forsands. Basically 'grout curtain' is constructed around the excavation by installation of various rows of injection holes for grouting.