Effect of soil Young’s modulus on Sub-rectangular tunnels behavior under quasi-static loadings

Tunnels are an important component of the transportation and utility system cities. They being constructed at increasing rate to facilitate need for space expansion in densely populated urban areas mega-cities. The circular rectangular tunnels cannot completely meet requirements underground exploitation regarding cross-section. Sub-rectangular recently used overcome some drawbacks terms low utilization ratio stress concentration, respectively. However, behavior sub-rectangular under seismic loading is still limited. This be regarded improved. paper focuses on conducting a numerical analysis study loadings. Here loadings this represented by quasi-static Based model tunnel that was validated comparison with analytical solutions, created. devoted highlight differences between compared ones subjected soil-lining interaction, i.e., full slip no-slip conditions particularly considered. influence soil’s Young’s modulus also investigated. results indicated significantly affects static, incremental, total internal forces lining Special attention significant difference stability both when