Research On Informational Construction In Xiong-dong Tunnel Of The Lanzhou-chongqing Railway

In our country, the advantage of the railway tunnel will be increasingly revealed in the mountain transportation industry with the development of the traffic in mountainous areas. Tunnel construction has become a hot topic with the increasing number of the long tunnel. Many tunnels construction are relying on experience of technicist for a long time before the NATM appeared. Due to the complexity of geological conditions, tunnels environment are unpredictability before excavation. So, when construction work with experience in such projects will lead to a certain blindness. Since the NATM appeared, the tunnel engineering introduced the dynamic construction, which has made a leap of the tunnel construction.Informational construction is a dynamic way to guide the tunnel construction by gathering dynamic information of surrounding rock and before excavation rock. Tunneling engineering informational construction is a set of systematic monitoring plan which build to reduce the risk of tunnel construction, it can make guide meaning to the tunnel construction.This thesis, relying on the construction of Xiongdongwan tunnel of Lanyu railway, do a deep analysis and research on informational construction by geological forecast, monitoring measurement and numerical simulation. Mainly includes the following content:Fistly. This paper introduces the method and technical requirements of the advance geological forecast. Analysis and processing the import and export forecast result which using TSP and geological to receive.Secondly. Introduces the content of monitoring measurement, the monitoring method and the analysis technology of monitoring measurement. Reported the rules of crown settlement and surrounding convergence according to the processing and regression analysis of their data, on basis of which evaluated the stability of surrounding rock and the working state of supporting structure. Thirdly. The result of numerical simulation and field measurement are compared to analysis the importance of position to the observation points. According to the bolt and lining structure stress of the numerical simulation to guide design the subsequent excavation supporting structure and timely modify unreasonable supporting structure.