Akademik Veri Yönetim Sistemi
14th Congress of the International-Association-for-Engineering-Geology-and-the-Environment (IAEG), Chengdu, Çin, 21 - 27 Eylül 2023, ss.477-488
In tunnel projects, one of the most common problems is the necessity of excavation under adverse geological and geotechnical conditions. A part of the T2 tunnel of Karaman-Ulukisla Railway System (south of Turkey) is shallow, and the ground conditions are weak and problematic. For this reason, in the study, the geotechnical problems of the T2 tunnel are described, and the engineering approaches for safe excavation of the T2 tunnel are introduced. A ground improvement with a deep soil mixing method (DSM) is selected for the safe tunnel excavation. The DSM columns before the tunnel excavation stage are designed, and all stages are analysed by employing finite element models. Based on the numerical analyses of the excavation stages, the mechanism, and the design concept of the tunnel with a ground improvement are discussed.