一种新型倾斜式输电铁塔延长腿的设计研究

Design and Research of a New Inclined Extended Legs on Electric Transmission Tower

山区输电线路面临坡度超过40°的陡峭地形时,常规长短腿级差无法满足地形需要,且坡上塔架地基稳定性降低。为解决这类问题,本文提出了输电铁塔延长腿组合模型,对多种延长腿布置方式的杆件内力、塔腿位移进行了比较。选出一种倾斜式新型延长腿,分析其力学性能和经济性,对于陡峭山区输电线路设计具有一定的参考意义。

For transmission line projects in mountain areas,the traditional long-short-legs differential cannot fulfill the topographic requirements,when the terrain slope is larger than 40 degrees.As a result,a lot of problems,such as large amount of foundation excavation,serious soil erosion and poor foundation stability,etc may appear.In order to solve these problems,this paper proposed a new type of inclined extended legs.The internal forces of the members,displacement of tower legs and economy of various layout schemes were analyzed correspondingly.The superiority,effectiveness and applicability of the new extended legs were alse analyzed.These factors are of certain reference significance for the design of transmission lines in steep mountain areas.