丹江口水库特大桥桥塔设计  

Design of Pylons of Danjiangkou Reservoir Bridge

作　　者：陈景丽 沈峰 刘敬 魏奇芬 廖原 CHEN Jing-li;SHEN Feng;LIU Jing;WEI Qi-fen;LIAO Yuan(Wuhan Communications Investment Group Limited Company,Wuhan 430048,China;Hubei Communications Investment Group Co.,Ltd.,Wuhan 430050,China;Hubei Communications Planning and Design Institute Co.,Ltd.,Wuhan 430051,China)

机构地区：[1]武汉交通工程建设投资集团有限公司,湖北武汉430048 [2]湖北交通投资集团有限公司,湖北武汉430050 [3]湖北省交通规划设计院股份有限公司,湖北武汉430051

出　　处：《桥梁建设》2023年第3期95-101,共7页Bridge Construction

基　　金：湖北省交通运输厅科技项目(2020-2-2-1)。

摘　　要：丹江口水库特大桥为主跨760 m的双塔部分地锚式轻型组合梁斜拉桥,采用梁塔分离、梁台固结的结构体系。综合考虑当地人文特色及山水环境特征,桥塔采用下塔柱内收呈倒八字的H形混凝土结构,两岸桥塔高度分别为194.09 m、199.41 m,塔柱采用D形截面,上、下横梁为单箱单室矩形截面。0~13号、14~24号斜拉索分别采用混凝土齿块、钢锚梁锚固于塔端,桥塔下横梁不设置竖向支座,0号斜拉索提供竖向支承。利用有限元软件对桥塔各施工及运营工况进行计算,并对索塔锚固区钢锚梁局部进行精细化分析,计算结果表明桥塔及索塔锚固区钢锚梁各项力学指标均满足规范要求。The Danjiangkou Reservoir Bridge is a two-pylon cable-stayed bridge with a main span of 760 m,featuring the earth-anchored stay cables.The superstructure consists of light composite girders.The deck is fixed with the abutments,instead of the pylons.To reflect the local culture and make a match with the surrounding waters and hills,the two pylons,rising 194.09 m and 199.41 m,respectively,are designed to be H-shaped concrete structures with inwardly-inclined lower columns.The pylon columns are of D-shaped cross-section,the upper and lower crossbeams are of single-cell box cross-section.The stay cables No.0 to 13 are anchored to the pylons via concrete wedges,while the stay cables No.14 to 24 are anchored to the pylons with steel anchor beams.There are no vertical bearings between the lower pylon crossbeam and the superstructure,and the stay cable No.0 provides vertical support.The construction and service stages of the pylons were numerically simulated,and refined analysis was carried out for local parts of the steel anchor beams in cable-pylon the anchorage zone.The calculations demonstrate that the mechanical property indexes of the pylons and the steel anchor beams meet the code requirements.

关 键 词：斜拉桥 H形桥塔 索塔锚固区 钢锚梁 受力分析 有限元法 桥梁设计 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U443.38[交通运输工程—道路与铁道工程]