Soft Loess Highway Tunnel Supporting System Characteristics Analysis

In spite of soft loess highway tunnel research made some achievements, but due to the weakness of loess, mechanical properties of soil particle in water and strong disintegrating the collapsible loess, and weak of regional difference is larger also, so new problems exposed continually, and has built tunnel under various diseases, tunnel construction process, these problems, some collapse tunnel as fast as the influence of safety traffic channel function, and then the property losses, apparently with the construction of the tunnel, this also good intensions to insiders more and more aware of loess highway tunnel construction of weakness, and finally to raise the level of the development and must rely on theoretical.AbstractThis great mountain in loess highway tunnel project, theoretically excavation of surrounding rock stress and strain, and from the Angle of mechanical stress and expounded the relationship between mechanical support system. Through the field test, study large-scale a lining and rock stress, an upward arch lining and two line contact pressure, axial force and bolt and lining concrete arch upward of stress and strain, changes with time and distribution characteristics.The numerical simulation software analysis of loess tunnel in the construction process and supporting system, summarizes its mechanical stress variation characteristics and distribution of different construction methods are analyzed, and the effect of the supporting system. Comprehensive analysis, the construction process and supporting system characteristics, and indicated weak links to supporting system construction force is ignored.