Ground Settlement of Deeply Buried Two-Lane Tunnels with Large Cross-Sections Using Different Construction Methods

To ensure the safety of excavations such as large section tunnels Guangxi Liubin Highway Tunnel Project, we implemented a simulation analysis 3D tunnel models based on finite software for different construction methods. Different from traditional simulation, this paper uses various methods to compare, study, and analyze advantages disadvantages excavation by combining them with excavation. The feasibility was analyzed studying mechanical characteristics settlement changes using Cross Diaphragm (CRD), Center (CD), full-section while building tunnel. arch perimeter deformation surface during initial support secondary lining proved that CRD method is most favorable causes least damage stability surrounding rock. For subsidence, “V”-shaped subsidence curve excavated closest curve. However, used adjusted peak formula fit prediction deep-buried two-lane cross-section applicable project, which will provide an important reference similar projects.