Expatiating the merits,mechanics and the key control technology of the injection process,and drawing a conclusion that it′s just an exploring process of injection process in the road basic reinforcement and needs to perfect it continuously in the future construction.

Combined with practical engineering,the author introduces the construction scheme of strengthening stratum combining surface grouting with lead small pipe grouting in tunnel,illustrates its construction technology,and shows by engineering practices that this construction scheme has well construction effect,in order to ensure tunnel construction smoothly crossing shallow section.