Aiming at the problems of high research cost,inflexible parameter adjustment and single influencing factor of dynamic response of semi-filled embankment,based on numerical simulation,this paper took the semi-filled embankment of a road section in Sichuan as an example to analyze the facility damage of semi-filled embankment under different levels of seismic load(6,7,8,9).The displacement deformation,slope stability and embankment bearing capacity of semi-filled embankment under different conditions were analyzed by artificial fitting seismic wave and introducing viscoelastic boundary.The slope stability was evaluated by strength reduction method and limit equilibrium method,and the bear-ing capacity of embankment was calculated by Terzaghi formula.The results show that under different working conditions,the error of the safety factor obtained by the strength reduction method compared with the limit equilibrium method could be controlled within 4％,indicating that the strength reduction method can better evaluate the slope stability;With the increase of seismic grade,the displacement increment of semi-filled embankment increases gradually,the slope stability decreases gradually,and the bearing capacity of embankment decreases gradually.The semi-filled embankment is in an unstable state under the action of 8 and 9 earthquake loads.Under the action of 8-level seismic load,the displace-ment increment of semi-filled embankment increases by about 20 times,the safety factor decreases by 52.8％,and the bearing capacity of embankment decreases by 57.0％.The year-on-year variation range is the most obvious,indicating that the 8-level seismic load is more destructive to the semi-filled em-bankment.
关键词
半填路堤/地震/位移变形/边坡稳定性/路堤承载力
Key words
semi-filled embankment/earthquake/displacement deformation/slope stability/bearing capacity of embankment
维普
万方数据