Research On Dynamic Deformation Regulation & Information Construction Technology Of The Tunnel In The Soft Surrounding Rock

In the construction of tunnels in mountainous heavy hilly area, many of them was built in the section of soft surrounding rock. At present, domestic studies are mainly focused on subway tunnels and long-span multi-arch tunnel, however, in the researches of tunnel construction and its monitoring measurement, because of the condition limitations, people always singly do research on previous prediction, excavation numerical simulation or measured data regressive analysis.Therefore, this thesis combining the engineering example of Duyan tunnel: 1. on the basis of analysis of adoption conditions, build random medium model of surface movement and deformation of Duyan tunnel, and select parameters adopted for calculation, use Mathematica software to make numerical integration, Forecast its surface movement and deformation and the laws; 2. build numerical model of Duyan tunnel through FLAC software, simulate dynamic the practical process of the tunnel excavation, obtain the regularity of surrounding rock dynamic deformation; 3. layout the monitoring measurement sections in the tunnels and on the surface rationally, and do regression analysis of the field data.According to the contrastive analysis of the random medium prediction result, the Numerical simulation analysis result, measured data and the result of regression analysis, the three results are slightly different from the point of quantitative; the three results are generally coincided the change trend from the point of qualitative. Therefore, the previous random medium prediction result and FLAC dynamic simulation result in process of excavation all reflect the field monitoring information, which complement each other, have effects on tunnel construction, and realize information construction in the complete meaning.Through the comprehensive contrast analysis of three methods mentioned above, that can feedback design modification and guide construction, bring the Duyan tunnel construction into scientific dynamic management, solve various problems in construction better, ensure the quality and safety of the construction.