Engineering geological studies for empirical design of tunnel 7 of Jakarta - Bandung high-speed railway, IndonesiaRiski Pramono, I Gde Budi Indrawan and Maulidya Indah JunicaE3S Web Conf., 325 (2021) 01007DOI: https://doi.org/10.1051/e3sconf/202132501007