Research On Prediction Analysis And Disposal Technology Of Karst Tunnel Lining Structure Based On On-site Monitoring Information

With the continuous development of China’s expressway network,the road network gradually is extending to the mountains and the construction of highway tunnels is also increasing.Due to the construction of a large number of tunnels,there are more and more complex geological phenomena,among which the karst phenomenon is a typical problem in the construction of highway tunnels in China.During the process of construction and operation,once the karst problem is not handled well,it will lead to greater property losses.Taking the Shiziling Tunnel as background,this research realized the real-time monitoring and measurement during its construction and operation by installing some monitoring elements on the typical section of the karst section of the Shiziling Tunnel.By analyzing the monitoring and measurement data,we found the deformation rule of lining structure of the tunnel karst section and estimated its safety.So we could provide early warning information for the tunnel construction.Based on real-time monitoring and measurement data of karst tunnels,this research establish a reasonable prediction model for the deformation of the lining structure combining with gray theory to predict the deformation trend of each section so as to provide scientific basis,which could save a lot of manpower and material resources.Combining previous experience,the disposal measures for the karst section of the Shiziling Tunnel were proposed.Moreover,the finite element software Midas GTS NX was used to perform numerical simulation analysis on the disposal measures,which confirmed their feasibility and offered references for the treatment to the tunnel.