| Penulis/Author |
MADANIA ASSHAGAB (1); Ir. Hendy Setiawan, S.T., M.Eng., Ph.D.. IPM. (2); Ir. Gayatri Indah Marliyani, S.T., M.Sc., Ph.D., IPM (3) |
| Abstrak/Abstract |
The diversion tunnel for the Riam Kiwa dam has a D-shaped design. Structural stability analysis is crucial for ensuring the safety of tunnel construction. The purpose of this study is to look into what happens to the Riam Kiwa Dam’s diversion tunnel when the shape of the tunnel changes, including how it was set up in the first place. This study examines circular and D-shaped tunnels subjected to dead load, maintaining uniform parameters such as soil/rock characteristics, dimensions, and reinforcement systems. The necessary data include surface geological measurements, core drilling observations, and tunnel geometry data. We acquired the data sources through field observations, laboratory analyses, and BWS Kalimantan III Banjarmasin. For computations in this study, the finite element approach, facilitated by Phase2 software, was used. The geological characteristics at the research location are predominantly rock, hence the numerical analysis will employ the Generalized Hoek-Brown failure criterion. The analytical findings will provide a comparison of tunnel geometries that present the most favorable deformation values for tunnel building. The research findings demonstrate that the deformation in circular tunnels is merely 39.1% of the deformation observed in D-shaped tunnels. Therefore, we can deduce that circular tunnels demonstrate greater stability compared to D-shaped tunnels. The tunnel’s shape can substantially influence the extent of deformation. |
