Abstract: The tunnel monitoring as well as surveying is an integral part of the New Austrian Method, which is very important for the determination of the primary supports and the secondary lining parameters that guiding the subsequent construction. This paper summarizes methods used in the tunnel deformation monitoring as well as control survey. It is concluded that the diagonal survey method has the advantage over other methods. Basic principles as well as the advantages of the diagonal survey method are also introduced in a case history of Shuya Tunnel construction in Huanglin.

Key words: Diagonal Survey Method, Control Survey, Data Processing