Wijaya W, Rahardjo PP, Lim A. Investigation of Twin Tunnel Deformation with Umbrella Grouting Protection & NATM Tunneling using 3D Finite Element: Case Study Cisumdawu Tunnel. U Karst [Internet]. 2021 Dec. 20 [cited 2024 Dec. 21];5(2):252-67. Available from: https://ojs.unik-kediri.ac.id/index.php/ukarst/article/view/1977