Abstract
The water inrush of the Shangjiawan karst tunnel is used to study the evolution pattern of precursor water inrush information in water-filled caves and to further reveal the matching mode of the information. The three-dimensional numerical method FLAC3D was used to simulate the evolution process of water inrush after damage to a water-blocking rock mass structure in a water-filled cave and to obtain the evolution pattern of precursor water-inrush information caused by the damage. The results show that the multifield response to the characteristic precursor information of the water-inrush pattern after the fracture of the water-blocking rock mass follows the order of stress-field displacement-field seepage-field. Further, the matching pattern of the information shows that the stress field increased first and then decreased, the displacement field always increased, and the seepage field increased first and then decreased.
Highlights
As the focus of infrastructure construction in China gradually shifts to the western mountainous areas with extremely complex geological environments, the challenges of tunnel construction are ever increasing
Most of the tunnel projects that are under construction or are about to be built in the western mountainous areas are high-risk karst tunnels, which have the characteristics of large burial depths, long tunnel lines, strong karst development and high water pressures [1,2]
This paper focuses on the evolution patterns of the stress field, the displacement field and the seepage field in the 11th to 25th excavation cycles
Summary
As the focus of infrastructure construction in China gradually shifts to the western mountainous areas with extremely complex geological environments, the challenges of tunnel construction are ever increasing. Many scholars have studied the influence of filling-type karst caves on the tunnel construction process. In the aspect of numerical simulation, scholars used the SPH method to develop a fluid-solid coupling program, and used the finite element method and discrete element method to systematically study the evolution law of water inrush and other disasters in Karst tunnels [4,5,6,7,8]. In terms of theoretical deduction and analysis, scientists used the non-linear evolution theory, thin plate theory and shear failure theory to analyze the water inrush and other disasters of karst tunnels in detail, and revealed the influence law of karst topography on the tunnel construction process [13,14,15,16]. Through the normalization of data, the catastrophe analysis of multiple points of information is carried out, and the matching mode of water inrush and precursory information of water resisting rock burst is proposed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
