Hydromechanical Simulation of Tunnel Excavation in Rock Considering a Nearby Karst Cave. (18th December 2021)

• Record Type: Journal Article
• Authors: Zhao, Huiling; Zhang, Fan; Yao, Xupeng
• Other Names: Meng Debiao Academic Editor.
• Is Part Of: Mathematical problems in engineering. Volume 2021(2021)
• Publication Date: 2021-12-18
• Subjects: Engineering mathematics -- Periodicals; 510.2462
• DOI: 10.1155/2021/7875725
• Languages: English
• ISSNs: 1024-123X

Abstract

Abstract : Tunnel excavation tends to be affected by karst cavities in karst areas. Some cavities that are at low risk of causing safety issues without treatment tend to be ignored in the design and construction of tunnels to reduce costs. It is necessary to gain a better understanding of the effect of such a cavity on the seepage around a tunnel, the deformation of the surrounding rock, and the stress of the tunnel lining. In this paper, a two-dimensional rock-tunnel hydromechanical model with a karst cave was established with FLAC3D finite difference software to simulate the tunnel excavation with the consideration of seepage. Numerical simulations were performed to analyze the deformation of the surrounding rock, the seepage field of the surrounding rock, and the stress of the tunnel lining, and the results were compared for scenarios when the karst cave is at different locations relative to the tunnel. These results can provide a reference for the design and construction of tunnel engineering in rock with karst caves.