English：

The Norwegian Method of Tunneling is adopted in the branch tunnel project of the NEOMtunnel in Saudi Arabia. The surrounding rock category is divided according to the Q value determined bythe geological sketch, and the supporting structure parameters required for the project are determined.Based on the detailed analysis of the parameters and calculation methods of the surrounding rockclassification method of the Q system, the geological work flow of the “ advanced exploration hole⁃geological sketch⁃TDMS tunnel file management system ” is formed from the aspects of advancedprediction, tunnel face determination, hidden engineering record and so on. Meanwhile, the Q systemclassification method is used to divide the surrounding rock support grade and select the correspondingsupport parameters. The support method of grouting bolt + shotcrete can be mainly used when thesurrounding rock grade is good. It is also necessary to use the grid steel frame / steel frame + steel mesh toensure the safety of the support system when the surrounding rock grade is weak.