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承载索式跨越装置中承载索的施工设计及计算研究

2018-09-10王刚李君章詹晖郑凯郑晓广

河南科技 2018年4期

王刚 李君章 詹晖 郑凯 郑晓广

摘 要:承载索式跨越装置由支撑装置、承载索和封网装置组成,是线路跨越施工中常用的跨越施工装置。承载索式跨越装置施工设计的核心是承載索的张力计算和规格选择。本文针对承载索的正常工况和事故工况下的受力及相互关系进行详细分析,给出了施工设计流程、计算方法及优化方法,为承载索跨越施工提供理论依据和安全保障。

关键词:承载索式跨越装置;施工设计;优化流程

中图分类号:U445.3 文献标识码:A 文章编号:1003-5168(2018)04-0119-04

The Construction Design and Calculating Study of Carrying

Rope of Over-crossing Device

WANG Gang1 LI Junzhang1 ZHAN Hui1 ZHENG Kai2 ZHENG Xiaoguang1

(1.Hean Electric Power Transmission and Transformation Construction Company Limited,Zhengzhou Henan 450000;

2. State Grid Zhengshou Electric Power Supply Company,Zhengzhou Henan 450000)

Abstract: The over-crossing device by carrying rope consists of supporting device,carrying rope and closed net, is commonly used in line crossing construction across the construction unit. The design of the over-crossing device by carrying rope is he core of tension calculation and choice of specification. In this paper under normal condition and accident conditions in a force and the mutual relationship of detailed analysis, construction design process was given, calculation method and optimization method, as to provide theoretical basis for over-crossing device by carrying rope construction and security.

Keywords: over-crossing device by carrying rope;construction design;optimize the process

随着社会经济和电力网的快速发展,输电线路建设过程中遇到的各种交叉跨越也较以往的线路工程急剧增加。在地形条件较差的山区,跨越物对地距离较高及同档有多处跨越物时,难以在现场搭设结构架封网型式的跨越装置,而承载索式跨越装置具有满足一定跨距情况下跨越高度较高、不受地形限制等优点,因此,其在输电线路跨越施工中被广泛采用。

承载索式跨越装置也被称为无跨越架不停电跨越架线[1-5],由支撑装置、承载索和封网装置组成[3]。承载索式跨越装置施工设计的核心是承载索的张力计算和规格选择。

1 承载索式跨越装置的组成

1.1 支撑装置

支撑装置包括承载体(杆塔、钢管式脚手架、格构式组合钢架等)、悬吊钢丝绳、悬吊横梁及承载索滑车等。支撑装置的作用是承受各种工况下承载索产生的垂直分力及较小的水平分力。

1.2 承载索

承载索主要包括主承载索以及与承载索相连接的延长绳索、调整工具(手板葫芦、缓松器)和地锚。……

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