Jet grouting curtain supporting technology for shaft heading face through quicksand layers with confined water

In order to solve the problem of the shaft heading in quicksand layers with confined water,the article proves a kind of technology and equipment for jet grouting with holding cement slurry on the condition of pressured water.The important data such as technological parameters and cementing material strenghth for single pile building using grout-holding method under conditions of quicksand layers with confined water were obtained,providing foundation for further application of the technology.