Mechanical Behavior and Stability Analysis of Underground Excavation Construction: Case Study of Large-Span and Variable Cross-Section Subway Crossover Tunnel
This paper presents a case study on the deformation characteristics and stress evolution of a large-span variable cross-section crossover tunnel excavated by the mining method. Three construction alternatives are compared: Scheme 1 adopts staggered excavation of twin tunnels with transverse passages, Scheme 2 adopts se...