Seismic isolation technology of shallow buried large section utility tunnel with soft soils in seismically vulnerable area

• DOI: 10.3389/feart.2024.1351978
• Publication Date: 2024-03-15T04:59:11Z
• Authors: Zhigang Wang; Lijun Chang; Huabing Ma; Li Zhu; Guangyao Cui; Hongwei Shan; Ziyang He
• Keywords: Section (typography)

Shallow utility tunnels with exceptionally large cross-sections in weak soil can face significantly more severe seismic risks compared to conventional deep hazard areas. This study investigates the response and isolation technologies applied a section tunnel 4 compartments one layer, employing simulations. The engineering context, dynamic motions, measuring points of numerical simulation were introduced. Subsequently, finite element method was employed explore behaviors when subjected strong earthquake excitations under four conditions. explored comparatively evaluated effectiveness three proposed schemes: grouting scheme, buffer assembly three-quarters cushion grouting. analysis included various indexes such as deformation, principal shear stress, safety factor. finding reveals that scheme exhibits most significant effect (95.39%), followed by layer (38.82%), (25.66%). is recommended for design current large-section tunnels. These conclusions provide valuable scientific guidance tunnels, aiding enhancing resilience.