膨胀土边坡滑移对输电线路杆塔稳定性的影响

The Impact of Expansive Soil Slope Slip on the Stability of Transmission Line Poles and Towers

膨胀土属于失水收缩,吸水膨胀的高塑性黏土。针对一次因膨胀土引起输电线路边坡出现滑移,导致杆塔基础倾斜和塔材弯曲的事故,对两种工况下基础稳定性进行分析,三种工况下杆塔稳定性分析,以及两个方向倒塔的相邻杆塔稳定性分析,定量得出此基杆塔的稳定性数据,以避免类似事故的再次发生。

Expansive soil is a kind of high plasticity clay which will shrink with water loss and expand with water absorption. Aiming at one accident that expansive soil caused the slip of slope near the transmission line, and resulted in the tilting of tower foundation and the bending of tower materials, the paper analyzes the foundation stability under two working conditions and tower stability under three working conditions, as well as the stability of adjacent towers which tilt in two directions, it quantitatively provides the stability data of the base tower, which may serve as reference for the avoidance of recurrence of similar accidents.