Research on tunnel rock pressure arch deformation and its contribution for surface subsidence

Abstract

Underground tunneling will cause surrounding rock stress redistributing and forming rock pressure arch. Therefore, in order to strike quantitative subsidence of tunnel vault. In this paper, the influence factors of tunnel surrounding rock pressure arch is analyzed, the scientific hypothesis is carried out, the pressure arch model is established, its stress is analyzed, and obtaining vault subsidence; meanwhile, taking Qingdao metro tunnel engineering cases��establishing empirical relationships between surface subsidence and dome subsidence. This achievement has important significance for tunnel excavation construction as well as control and design of surface environment.