Application of Chemical Grouting Method in Settle Down Disengaging of Cement Concrete Slab

For expressway cement concrete pavement bottom existing void problems, the paper introduced the method of chemical grouting treatment according to the analysis of the causes of the disease began. According to grouting material, devices selection, construction procedure, quality inspection, treatment effect, and the problems existing in the project and so on, this paper summarized treatment experience. The results showed that treating hole under Concrete Pavement with Chemical grouting method can improve pavement usefulness obviously.