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Invert Heave Disease and Treatment Measures of Operating Railway Tunnel in Horizontal Layered Rock Mass
During operation of the Yunding Tunnel, the uplift displacement of the invert increases continuously, seriously impacting the safety of the tunnel structure and the normal operation of the railway line. To study the occurrence mechanism and evolution law of invert heave disease of railway tunnel in horizontal layered rock mass, both field investigation and numerical simulations were carried out, and the influence of layer thickness of layered rock mass and horizontal in-situ stresses were discussed. The results show that the deformation characteristic of layered rock mass is the main factor leading to the disease in operating tunnels. Especially in thin-thick to medium-thick layered rock mass and the horizontal in-situ stress of K0 less than 1.0 or more than 2.0, it is difficult to ensure the stability and safety of bottom structure. Moreover, two proposed treatment schemes were analyzed to evaluate the regulation effect, and the latter scheme was recommended to be used in the project. This study can provide a reference for the treatment of operating tunnel in horizontal layered rock masses.
Invert Heave Disease and Treatment Measures of Operating Railway Tunnel in Horizontal Layered Rock Mass
During operation of the Yunding Tunnel, the uplift displacement of the invert increases continuously, seriously impacting the safety of the tunnel structure and the normal operation of the railway line. To study the occurrence mechanism and evolution law of invert heave disease of railway tunnel in horizontal layered rock mass, both field investigation and numerical simulations were carried out, and the influence of layer thickness of layered rock mass and horizontal in-situ stresses were discussed. The results show that the deformation characteristic of layered rock mass is the main factor leading to the disease in operating tunnels. Especially in thin-thick to medium-thick layered rock mass and the horizontal in-situ stress of K0 less than 1.0 or more than 2.0, it is difficult to ensure the stability and safety of bottom structure. Moreover, two proposed treatment schemes were analyzed to evaluate the regulation effect, and the latter scheme was recommended to be used in the project. This study can provide a reference for the treatment of operating tunnel in horizontal layered rock masses.
Invert Heave Disease and Treatment Measures of Operating Railway Tunnel in Horizontal Layered Rock Mass
Sustain. Civil Infrastruct.
Yang, J. James (editor) / Cheng, Wen-Chieh (editor) / Wang, Shuying (editor) / Li, Linyi (author) / Yang, Junsheng (author) / Wu, Jian (author) / Wang, Shuying (author) / Fang, Xinghua (author) / Xiang, Maolong (author)
Civil Infrastructures Confronting Severe Weathers and Climate Changes Conference ; 2021 ; NanChang, China
Advanced Tunneling Techniques and Information Modeling of Underground Infrastructure ; Chapter: 3 ; 37-56
2021-07-11
20 pages
Article/Chapter (Book)
Electronic Resource
English
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