[Objective] In order to improve the formation adaptability of the tunnel boring machine (shorten as TBM) and solve the problem of TBM selection for the west extension section of Qingdao Metro Line 2 (hereinafter referred to as Line 2) in the complex formation offshore. it is necessary to optimize TBM selection and control tunneling parameters. [Method] From the aspects of geological c... https://www.alarecre.com/American-Flag-Color-Block-iPhone-14-Waterproof-Case-p12619/