Abstract
Tunnel-landslide systems often cause slope deformation due to tunnel excavation along the slip surface. Based on the three-dimensional numerical calculation, the point safety factor of the interface (slip surface) of the tunnel-landslide system is defined as the ratio of the shear strength of the node to the sliding force. Taking an oblique tunnel-landslide system along the BAOJI-LANZHOU Passenger Dedicated Line as the main study objectives, the author determines the deformation mechanism of tunnel-landslide systems through the analysis of the distribution characteristics of the point safety factor of the interface. In this study, the conditions during excavation, conditions after construction, the interaction stability, deformation laws and possible failure modes, etc. of the tunnel-landslide system are seriously investigated. Our research indicates that the point safety factor of the interface can be taken as a quantitative assessment index of the tunnel-landslide system’s stability.
Highlights
Regarding the construction of highways and railways in mountainous areas, when tunnel construction cuts through a landslide it will affect the landslide’s stability
In the processes of tunnel construction and operation, the tunnel and slope deformation have a close interaction, so the study of the deformation mechanism of the system should follow a principle of cooperation (Tao 2003)
This paper gives a definition of the point safety factor in terms of the contact element, using FLAC3D to establish a numerical model for the surface element of the slide contact based on the contact surface stress obtained by numerical calculation combined with the safety coefficient of the Coulomb strength criterion definition
Summary
Regarding the construction of highways and railways in mountainous areas, when tunnel construction cuts through a landslide it will affect the landslide’s stability. This paper gives a definition of the point safety factor in terms of the contact element, using FLAC3D to establish a numerical model for the surface element of the slide contact based on the contact surface stress obtained by numerical calculation combined with the safety coefficient of the Coulomb strength criterion definition. Taking an oblique tunnel-landslide system along the BAOJI-LANZHOU Passenger Dedicated Line as the main study objectives, we use contact analysis of the tunnel construction before and after landslide system (surface) distribution of the point safety factor to evaluate the effects of tunnel excavation on landslide stability.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
