马鞍山长江公路大桥缠丝力计算  

Calculation for lead-in force of main cable wrapping in Maanshan Yangtze River Highway Bridge

作　　者：姚琨[1] 徐开磊[1] 

机构地区：[1]中交第二公路工程局有限公司,陕西西安710065

出　　处：《黑龙江工程学院学报》2016年第4期25-27,55,共4页Journal of Heilongjiang Institute of Technology

摘　　要：悬索桥的主缆是悬索桥的主要受力构件,在该类桥梁使用期限内,修复工程相当困难,更不允许更新拆换。因此,预先采取物理防护措施,在大桥主缆表面进行现场缠丝防护作业,以一定的张力使镀锌软钢丝牢固密匝地缠绕在主缆上,用以保护主缆钢丝免受大气、雨水侵蚀及防止意外碰撞,保证涂装防护效果,延长大桥使用寿命,已成为保障悬索式大桥安全使用寿命的重要措施。文中以马鞍山长江公路大桥工程为背景,考虑缠丝工况、主缆拉力增量等因素,对缠丝导入力的计算方法进行完善,并根据现有材料技术,制定该桥的缠丝施工工艺,保证该桥顺利施工。Main cable is one of the most important structure of suspension bridge. During the term of use, it is very difficult to maintenance and update the suspension bridges. The main cable wrapping in suspension bridge focuses on leading in the wrapping steel wire loops with big tensile force to form a hoop with enough pressure on the surface of main cable so as to guarantee the painting protection effect and prevent main cable from corrosion by atmosphere. Based on Maanshan Yangtze River Highway Bridge, this paper perfects the calculation methods for lead-in force of wrapping, and determines the wrapping construction technology. According to existing material techniques, it makes the wrapped construction technology, and ensures the smooth implementation of this bridge.

关 键 词：悬索桥 主缆 缠丝 导入力 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]