110kV上字型直线铁塔设计

 2022-11-27 01:11

论文总字数:25173字

摘 要

我国地域辽阔,高压架空线路分布很广又长期露天运行,经常会受到周围环境和大自然变化的影响,输电铁塔断材倾倒事件时有发生,危及线路的安全运行和电能的输送。高压架空线路杆塔是架空输电线路重要组成部分,杆塔结构设计质量直接影响输电线路建设速度、经济性以及线路运行的可靠性,因此做好架空线路杆塔结构设计是非常有意义的工作。

本设计为一基110kV上字型单回路直线铁塔的工程设计,设计数据和图纸来源于实际工程。要求根据任务书给定的数据独立完成架空线路应力弧垂计算;根据给定铁塔型式完成杆塔各种情况下的荷载计算;进行铁塔主材斜材内力计算并选择规格;绘制铁塔结构图;统计铁塔设备材料清单。

本设计中简要说明了各个设计理论和计算公式, 列出了详细的设计内容与要求,注意事项等,给出了一些相关的设计图纸。

关键词:上字型直线铁塔、铁塔内力计算及规格的选择、绘制铁塔结构图、

Abstract

China has a vast territory. High voltage overhead lines are widely distributed and operate in the open air for a long time. They are often affected by the changes of the surrounding environment and nature. The incidents of broken materials and toppling of transmission towers occur from time to time, which endanger the safe operation of lines and the transmission of electric energy. High voltage overhead line tower is an important part of overhead transmission line. The design quality of tower structure directly affects the speed of transmission line construction, economy and reliability of line operation. Therefore, it is very meaningful to do a good job in tower structure design of overhead line.

This design is the engineering design of a 110kV single circuit linear iron tower. The design data and drawings come from the actual project. It is required to complete the calculation of overhead line stress sag independently according to the data given in the assignment; According to the given type of tower, the load calculation of tower under various conditions is completed; Internal force calculation and specification selection of the tower's main diagonal member are carried out; Drawing tower structure diagram; Statistics tower equipment and material list.

This design briefly describes the design theory and calculation formula, lists the detailed design content and requirements, matters needing attention, etc., and gives some relevant design drawings.

Key words: straight tower, internal force calculation and specification selection of tower, drawing tower structure diagram

目录

1 引言 2

1.1设计背景 3

1.2铁塔设计概述 3

2 架空线的应力弧垂计算 4

2.1 架空线线应力弧垂计算数据 5

2.2 架空线的比载公式 6

2.3 架空线中导线应力及弧垂计算 7

2.4 架空线最大弧垂的判定 9

2.5架空线应力弧垂表 9

3 架空地线的应力弧垂计算 12

3.1 架空地线的比载公式 12

3.2 架空地线应力弧垂计算数据 13

3.3 计算临界档距和判定控制条件 15

3.4 架空地线的应力弧垂表 17

4 上字型铁塔荷载分析计算 19

4.1 荷载计算 19

4.2 导线运行情况的计算 23

4.3 杆身风压计算 27

5 上字型铁塔主材斜材内力计算 30

5.1 杆塔形式选择 33

5.2 绝缘子的选用 33

5.3 杆塔的定位高度 34

5.4 铁塔塔头尺寸的校核 35

5.5 上字型铁塔内力计算 39

5.6 上字型铁塔规格选择 45

6 上字型铁塔结构图绘制 47

致谢 52

参考文献 53

附录A 导线应力弧垂曲线 54

附录B 避雷线应力弧垂曲线 55

附录C 上字型铁塔结构图 56

2.架空线的应力弧垂计算

2.1 导线应力弧垂计算数据

设计内容:

(1)导线的应力及弧垂计算,绘制导线机械特性曲线,安全系数取2.5。

(1)导线型号:根据电力系统规划设计,拟新建线路的导(地)线型号采用LGJ-240/40(GJ-50)。

(3)气象条件:相当于我国典型气象区的第 VI 区。

(1)整理该气象区的计算用气象条件

表2.1 计算用气象条件

气象

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