Research Of Construction Mechanical Behavior And Monitoring Technology Of Xingtai-fenyan Expressway Tunnel

In the 21 st century, the construction and operation management of highway tunnels there are some new features, such as the large number of span large section tunnel construction is growing, the practical application of large-scale drilling machines, the importance of a clean environment and the construction of the network information preliminary application of intelligent technology. Along with these new features have emerged, there are some appropriate technical problems need to be addressed. Although the construction of the tunnel and technology workers and management personnel in research and problem solving aspects of these technologies to make a positive contribution and have made some achievements, but in practice there are still affecting the rapid construction of tunnel safety and security and efficient operation of the special bottlenecks or problems to be solved.At present, the main battlefield of highway construction in Hebei Province has entered the mountains, especially the significant increase in the proportion of largespan section of three-lane highway tunnel surrounding rock large span structural studies section three-lane highway tunnel under complicated geological conditions stress, construction mechanical behaviors and monitoring technology, to guarantee the safety of the tunnel construction, accelerate highway construction is of great significance.Based on expressway tunnel of Xingtai-Fenyang highway, the author studies on the construction mechanical behaviors and monitoring technology of expressway tunnel. The research of tunnel construction mechanical behaviors mainly includes rock and supporting structured stree and deformation of different surrounding rock classifications and different excavation methods and overburden thickness. The monitoring measurement mainly includes geological sketch and ground settlement and crown settlement and convergence deformation and steel stress and bolt axial force and loose circle test. The research results are important to help tunnel construction safety and construction quality.