Research on Surrounding Rock Classification and Support System by Q-system of Saudi Arabia NEOM Tunnel Project
The Norwegian Method of Tunneling is adopted in the branch tunnel project of the NEOM tunnel in Saudi Arabia.The surrounding rock category is divided according to the Q value determined by the 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 rock classification 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 advanced prediction,tunnel face determination,hidden engineering record and so on.Meanwhile,the Q system classification method is used to divide the surrounding rock support grade and select the corresponding support parameters.The support method of grouting bolt+shotcrete can be mainly used when the surrounding rock grade is good.It is also necessary to use the grid steel frame/steel frame+steel mesh to ensure the safety of the support system when the surrounding rock grade is weak.
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万方数据
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