Analysis of the Mechanical Characteristics and Stability of Horizontal Mudstone-Sandstone Interbedded Surrounding Rock Tunnel
Horizontal rock structure is special and widely distributed,and engineering accidents such as separation and falling block are easy to occur during construction.Analyzing the mechanical characteristics and stability of interlayered horizontal rock tunnel is of great significance for tunnel design and construction.Based on the structural characteristics of the horizontal layer rock,the formation of the separated layer of the arch roof and the collapse arch are analyzed theoretically,a simplified beam model and a thin plate model are established,the mechanical characteristics and stability of the horizontal interlayer surrounding rock tunnel are systematically compared and analyzed,and the expressions of the maximum normal stress,maximum shear stress and maximum deformation value that the horizontal layer rock can withstand are derived.The deformation and failure process of the arch roof horizontal layer rock under stress are explained.The results of model calculation,field measurement and numerical simulation are basically consistent in magnitude and trend,which shows the importance of timely support and control of arch deformation.
NETL
NSTL
万方数据
维普
