Wanglong River TunnelStability Analysis

This thesis depended on the ongoing Wanglong River Tunnel which belong to Ru-Chen Highway, Combined with the Research Project of information construction of this tunnel, analyzed monitoring and measuring techniques of this large span tunnel, used Research Method such as theoretical analysis and field observation, to do related technology research about monitoring and measuring. The main results are as follows:1.Based on a wide range of topics of relevant investigations, a lot of domestic and foreign literature, and the truth tunnel situation of Wanglong River, we detailed introduced the installation method of monitor section, the collection methods of measure data, and we have an intensive discussion of the technology of monitoring and measuring the tunnel. Finally, we obtained the most practical method.2. The regression analysis used the following three functions:logarithmic functions, exponential functions, hyperbolic functions. For a cross section of the displacement time curve, these three functions of regression curve is not always appropriate. At this time should do regression analysis of the three functions for displacement-time curve, and select the maximum absolute correlation coefficient of the regression curve as the trend line for such section.3. Grey analysis can predict the change of surrounding rock displacement in a period of time. In practice, according to three basic regression functions, analysis measured data with grey analysis. Select an appropriate predicted curve through correlation coefficient. Besides, predicted curve can predict the next few days the total displacement of surrounding rock and the trends of surrounding rock displacement, and moreover, can judge the stability of surrounding rock, and can determine whether the rock's initial support effective constraint the deformation of surrounding rock.