基于数值模拟的外界荷载对边坡稳定性影响的研究

Research on the Influence of External Load on Slope Stability Based on Numerical Simulation

文中基于某变电站220kV线路工程,通过稳定性标准建立模型,在30m/s的风速下,对4种杆塔在不同方向上的位移情况进行研究,分析了杆塔在顶部和底部位移变化和最大倾斜率情况。研究表明,杆塔顶部位移最大。杆塔地表以上的位移受土体约束影响,在荷载作用下,杆塔的位移变化也受方向影响。风速与杆塔位移变化呈正相关,但在相同风速下,4号杆塔位移值最大,3号杆塔沉降值最大。杆塔最大倾斜率满足规范要求,随着风速变大,柱顶与柱底最大倾斜率差距越来越大。

Based on a 220 kV line project in a substation,this paper establishes a model using stability criteria,studies the displacement of four types of towers in different directions at a wind speed of 30 m/s,and analyzes the displacement changes and maximumn iclination of the towers at the top and bottom.Research has shown that,thed isplacement at the top of the tower is the largest.The displcaement above the ground surface of the tower is affected by soil constraints,and the displacement change of the tower under load is also affected by the direction.There is a positive correlation between wind speed and tower displacement,but at the same wind speed,the displacement value of No.4 tower is the largest,and the settlement displacementv alue of No.3 tower is the largest.The maximum inclination rtae of the tower meets the specification requirements,and the gap between the oclumn top and the column bottom becomes larger and larger withth e wind speed.