Research On Comprehensive Deformation Features Of Wall Rock And Construction Method Of Guanshan Tunnel

With the rapid development of traffic construction in Gansu Province,increasing the number of tunnel,tunnel monitoring as an important part of the construction of the new Austrian law,has been widely used in the construction process of the tunnel detection,combined with the Guanshan tunnel monitoring project,carry out the research work on the analysis of the tunnel monitoring and data processing.The research on the measuring principle,the tunnel monitoring measurement,data acquisition and processing analysis and other aspects of Guanshan tunnel surrounding rock deformation characteristics and stability were analyzed,the main conclusion as following:1.Based on a large number of domestic and foreign literature,combined with the practice of mountain tunnel engineering,introduces the installation method of monitoring measurement section equipment,measurement data collecting method,in-depth discussion of the tunnel monitoring measurement technology.2.Through reference to the data processing scheme used in tunnel construction monitoring,a variety of monitoring measurement information processing and analysis methods are studied,the most widely used and reasonable regression analysis model,the index function,logarithmic function and hyperbolic function are used to analyze the dome settlement and the surrounding displacement monitoring data,from which the highest correlation function is selected to predict the final value of displacement,so as to guide the subsequent design and construction.3.According to the analysis results of dome settlement and surrounding displacement of mountain tunnel,the deformation of each monitoring point in mountain tunnel is basically stable,the cumulative settlement is less than the reserved deformation(15 cm),and is not beyond the design range,the ground surface settlement,dome settlement and surrounding displacement of the opening section meet the design requirements,the initial support design is reasonable,safe and reliable.The management grade of surrounding rock is grade iii,and can be constructed normally.4.By means of numerical simulation,the deformation mechanism and stress of surrounding rock of tunnel under different excavation methods are studied,and the advantages and disadvantages of various excavation methods are analyzed and compared.the research results have certain reference value for engineering practice and scientific research.