Analisis Penyangga Terowongan Pelimpah Bendungan Manikin

Abstract

The spillway is one of the complimentary structures that make up a dam's main structure. A number of technical considerations must be made in the spillway design to avoid collapse, which could have an impact on the dam's overall performance. Manikin Dam's spillway is of the morning glory variety, which typically doubles as a spillway tunnel. Because failures might be caused by insufficient support systems or unfavorable geological conditions, tunnel excavation requires careful design. Using computer-assisted simulations, this study examines the stability of the spillway tunnel excavation while utilizing wire mesh, rock bolts, and shotcrete as tunnel support systems. The safety factor acquired at each stage of excavation is used to assess the stability of the tunnel. Variations in the safety factor during the excavation of the spillway tunnel are evident from the analysis results.