Analysis of Over-square Causes and Control Measures of Wet Sshotcrete in Tunnel

Taking the EMZQ-3 bid Laobishan tunnel project from Emei to Miyi section in Chengdu–Kunming Railway as an example, this paper expounds the causes of over-prescription of wet shotcrete in Laobishan tunnel, and formulates the control measures according to the causes, as well as the economic and social benefits, it provides a feasible scheme for reducing the cost of tunnel construction, and has certain reference significance for the over-square control of wet shotcrete in the future.