Research on Nonlinear Force Characteristics of Tunnel Lining and Anti-slide Pile Structure under Action of Landslide with Different Sliding Zone Angles
With the deepening of research on the support of the landslide tunnel system,the research on the force be-tween the landslide tunnel and the anti-slide pile support is particularly important.In order to study the bearing charac-teristics of the tunnel lining structure and anti-slide piles under the influence of six slip angles of 0°,10°,20°,30°,40°,and 50°,based on the Nanping Tunnel of Dazhun Railway,the methods of indoor scale test and numerical simula-tion were used to study the law of force and deformation among the three.The results show that as the angle of the slip zone increases,the deformation of the pile and the tunnel lining structure gradually decreases,resulting in the gradual reduction of the soil pressure and bending moment acting on the tunnel and the pile.At the same time,at 0°,10°,20°,and 30°,the horizontal thrust of the landslide has a greater impact on the force of the tunnel lining structure.At the slid-ing zone angles of 40°and 50°,the impact of the horizontal thrust of the landslide is significantly attenuated,with gradu-al increase of the proportion of vertical load at the arch foot.When the sliding zone angle is less than 30°,the impact of the horizontal thrust of the landslide on the tunnel structure should be mainly considered.When it is greater than 30°,the main consideration is the impact of the vertical load generated by the landslide on the tunnel lining structure.At this time,the inverted arch of the tunnel and the arch foot near the slope should be strengthened.The experimental and simu-lation results obtained in this paper provide a certain reference for the construction of tunnels and anti-sliding pile support.
sliding zone anglelandslidetunnelanti-skid pile supportnonlinear mechanical characteristics
万方数据
维普
