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DOI:10.7672/sgjs2016140054
施工技术
CONSTRUCTION TECHNOLOGY
2016年7月下第45卷第14期
张家界大峡谷玻璃桥主缆施工过程高程控制分析
李飞1,2,高璞12,马亮,周俊龙1,2(1.中国建筑第六工程局有限公司,天津300451;
2.天津市土木工程绿色建造与节能技术企业重点实验室,天津300450
【摘要】不同于平行索面悬索桥,空间索面悬索桥由于主缆的空间性,成桥状态主缆的标高往往会高于空缆状态。而整个主缆施工过程中,主缆对拉及加劲架、吊杆的安装均会对其标高产生影响。对拉会使主缆上升,分段吊装加劲梁后主缆存在着一个“先升高后回落"的过程。以张家界大峡谷玻璃桥为例,采用ANSYS有限元软件对主缆对拉及加劲梁吊装过程中梁段与主缆是否碰撞进行分析,对主缆在整个施工过程中的空间位置进行预判,指导桥梁
施工,避免与吊装中的加劲梁发生碰撞,保证工程顺利进行,【关键词]悬索桥;空间索面;对拉施工;缆索起重机
[中图分类号]TU758.1;U445.461
【文献标识码]A
[文章编号】1002-8498(2016)14-0054-04
The Space Position and Collision Analysis of Main Cable ConstructionofZhangjiajieGrandCanyonGlassBridge
Li Fei'2, Gao Pu'2, Ma Liang', Zhou Junlong.2
(1. China Construction Sixth Engineering Co. , Ltd. , Tianjin 300451, China; 2. Tianjin Corporate Key Laboratory of Green Construction & Energy-sawing
Technology of Civil Engineering, Tianjin 300450, China)
Abstract:Different from the parallel cable suspension bridge, due to the space of the main cable, the status of the main cable of the spatial cable suspension bridge is often higher than the status of the cable. During the construction of the main cable,the pulling between the main cables,the installation of stiffening girder and boom will affect its elevation. The main cable is raised because of pulling, and the main cable after segmental hoisting of stiffening girder has a process of " first rising and then falling" Taking Zhangjiajie Grand Canyon Skywalk glass bridge as an example,the ANSYS finite element software was used to analyze whether the collision accrued between the beams and the main cables in the main cable tension and stiffening girder erection process, prejudge the spatial position of the cable in the construction process, guide the construction of the bridge, which can avoid collision with the stiffening girder in hoisting to ensure the smooth progress of the project, and provide a reference to the same kinds of bridgeconstruction.
Key words: suspension bridge; spatial cables; pulling construction; cable crane
0
引言
目前国内文献上提到的空间索面悬索桥数量
较少,其中涉及的主要是基于分段悬链线理论的解析法或利用三维有限元模型进行的主缆成桥线形分析和空间索面悬索桥的关键节点构造施工控
*中建股份科技研发课题(CSCEC-2015-Z-06);天津市土木工程绿五律与节能技本企业重点实室
[作者简介]李飞,技术中心业务经理,E-mail:swiftsuel987@ 126.cor
【收稿日期】2016-07-08
制14]。对于主缆的对拉施工及其与吊装梁段的碰撞分析却很少提及。本文以张家界大峡谷玻璃桥为例,采用ANSYS有限元软件对主缆的对拉施工进行分析,确定主缆对拉后的高程,并对加劲吊装过程中梁段与主缆是否碰撞进行分析,确定缆索起
重机高程的合理性,为顺利施工提供理论基础。 1工程概况
张家界大峡谷玻璃桥为主跨430m的空间索面地锚式悬索桥,主跨加劲梁跨度为385m,加劲梁为纵、横梁体系,钢纵梁内灌注混凝土,钢纵、横梁间