张家界大峡谷玻璃桥加劲梁架设施工技术

发布时间：2018-01-23 18:53

本文关键词： 悬索桥空间主缆加劲梁纵、横梁结构缆索吊机拼装吊装施工技术　出处：《世界桥梁》2017年03期 　论文类型：期刊论文

【摘要】：张家界大峡谷玻璃桥为主跨430m空间主缆人行悬索桥,加劲梁采用钢制纵、横梁结构,两端各50m范围为变宽段,桥面宽度由6m按线性规律变化至15m,共划分37个节段。根据桥址处特殊的建设条件及空间主缆悬索桥的特点,通过比选,确定加劲梁采用缆索吊吊装方案。缆索吊机起重量设计为45t;由于运输宽度限制,厂内横梁和纵梁分开制作,运至现场后再组装成节段;端横梁及端部节段(L7节段)在临时支架上拼装后安装并固定在支座垫石上,然后由两侧向中间对称架设其它节段,节段间使用临时连接件进行连接。该施工技术在保证加劲梁施工过程中峡谷抗风稳定性的同时,缩短了工期,37个节段吊装完成仅用了10d。
[Abstract]:Zhangjiajie Grand Canyon Glass Bridge is the main span 430m space main cable pedestrian suspension bridge, the stiffening beam is made of steel longitudinal, crossbeam structure, each end of 50m wide range. The width of bridge deck is changed from 6 m to 15 m according to the linear law, and it is divided into 37 segments. According to the special construction conditions at the bridge site and the characteristics of the space main cable suspension bridge, the bridge is compared and selected. It is determined that the hoisting scheme of the stiffening beam is cable hoisting. The lifting weight of the cable crane is designed to be 45 t. Due to the limitation of transportation width, the cross beam and the longitudinal beam in the factory are made separately, and then assembled into segments after transportation to the site; End beam and end segment (L7 segment) are assembled on temporary support and fixed on the supporting cushion stone, and other segments are set up symmetrically from both sides to the middle. Temporary connectors are used to connect between segments. This construction technique not only guarantees the stability of canyon wind resistance in the construction process of stiffened beam, but also shortens the construction period, and only takes 10 days to complete the hoisting of 37 segments.
【作者单位】：中建六局桥梁有限公司;
【分类号】：U445.4
【正文快照】： 1工程概况张家界大峡谷玻璃桥为主跨430 m的悬索桥(见图1),采用空间索面结构形式,大桥一跨飞跃峡谷,桥面距谷底高差约300m,大桥建成后兼具了景区行人通行、游览、蹦极、溜索和科教等功能。桥塔为钢筋混凝土结构,塔高40.65m。锚碇根据地形、地质情况分别采用重力式和隧道式。加

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