张家界大峡谷玻璃桥加劲梁设计  

Design of Stiffening Girder of Zhangjiajie Grand Canyon Glass Floor Bridge

作　　者：方绪镯[1] 王忠彬[1] 石建华[1] 

机构地区：[1]中铁大桥勘测设计院集团有限公司,湖北武汉430056

出　　处：《桥梁建设》2017年第2期78-82,共5页Bridge Construction

摘　　要：张家界大峡谷玻璃桥是一座人行景观桥,该桥采用主缆跨度430m的空间索面地锚式悬索桥。加劲梁采用倒梯形截面钢箱梁,纵、横梁结构,单跨悬吊简支体系。加劲梁跨度373m,高0.6m,中间部分为6.0m标准等宽段,两端各50.0m范围桥面宽度由6.0m线性变化至15.0m。加劲梁主纵梁横桥向间距4.5m,沿桥跨方向通长设置;在变宽段上、下游外侧各增设1道边纵梁。横梁标准间距5.0m。在加劲梁纵梁内灌注混凝土,钢纵、横梁间露空部分铺设钢化夹胶玻璃。通过刚性吊杆将蹦极、溜索平台悬挂于加劲梁下方。加劲梁的纵、横梁在工厂分片制造,在工地组装成整节段,利用缆索吊机在主缆及吊索安装到位后从两边往跨中架设,在跨中合龙。Zhangjiajie Grand Canyon Glass Floor Bridge is a scenic pedestrian bridge and is designed as a ground anchored suspension bridge with spatial cable planes and with span length of its main cables being 430 m.The stiffening girder of the bridge has the steel box girders of the inverted trapezoid sections and the girder is a structure comprised of the longitudinal girders and cross beams and is characterized by the single-span simply-supported suspension system.The span length of the stiffening girder is 373 mand the depth is 0.6m.In the middle part of the girder,the standard uniform floor width of 6.0mis designed and in each 50.0mrange at both ends of the girder,the floor width linearly varies from 6.0mto 15.0m.The spacing distance of the main longitudinal girders of the stiffening girder in the transverse direction is 4.5 mand the longitudinal girders are arranged in full length along the span length.At the upstream and downstream outer sides of the varied sections of the stiffening girder,each one edge longitudinal girder is added and the standard spacing distance of most of the cross beams is 5.0m.In the longitudinal girders,the concrete is cast and on the hollow parts among the longitudinal girders and cross beams,the tempered laminated glasses are laid.By means of the rigid suspenders,the platforms for the bungee jump and cableway sliding are suspended under the stiffening girder.The longitudinal girders and cross beams are manufactured in units in the workshop,assembled into full segments in the field,are erected from two sides of the bridge towards the midspan and are closed there,using the cable crane after the main cables and suspenders are installed in place.

关 键 词：人行桥 景观桥 悬索桥 钢箱梁 玻璃桥面 结构构造 附属设施 桥梁设计 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]