In order to meet the requirements of foundation chemical grouting strengthening for Three Gorges Project, several typical epoxy resin grouts have been tested; their physical and mechanical properties were compared with one another. The effects of surfactant and soil modifier have been emphatically studied. The pretreatment of soil using modifier before chemical grouting could improve the soil permeability. According to the analysis of penetration mechanism for chemical grouts, an effective grouting procedure has been suggested.