山区输电线路杆塔边坡防护方案选择及应用

山区某运行中的架空输电线路杆塔基础下侧山体,在新建道路施工过程中产生了挖方边坡,针对该挖方边坡的安全性问题,分别进行正常工况和暴雨工况下的边坡稳定性验算。根据验算结果,认为暴雨工况下边坡具有滑移失稳风险。通过对暴雨工况下滑坡推力和主动土压力的分析计算,结合输电线路杆塔运行、道路通行等因素,对多种防护方案进行了对比分析,最终采用了桩板式挡土墙防护方法。工程实施应用后,验证了该方案具有安全可靠、施工便捷等优势,保障了架空输电线路杆塔的安全及正常运行。

Selection and Application of Slope Protection Scheme for Transmission Line Tower in Mountainous Area

In the process of new road construction,an excavated slope under the foundation of an overhead transmission line in operation in mountain area is produced.In view of the safety of the excavated slope,the stability checking computations are carried out under normal and rainstorm conditions respectively.According to the checking results,it is considered that the slope has sliding instability risk under rainstorm conditions.Through the analysis and calculation of landslide thrust and active earth pressure under rainstorm conditions,combined with the factors of transmission line tower operation and road traffic,a variety of protection schemes are compared and analyzed,and finally the pile-sheet retaining wall protection method is adopted.After the application of the project,it is verified that the scheme has the advantages of convenient construction,safety and beauty,and ensures the safety and normal operation of the overhead transmission line tower.