深圳茅洲河碧道燕罗人行桥设计  

Design of Yanluo Footbridge on Maozhou River Greenway in Shenzhen

作　　者：蒋甫海 方健 JIANG Fu-hai;FANG Jian(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《世界桥梁》2022年第2期31-36,共6页World Bridges

摘　　要：深圳茅洲河碧道燕罗人行桥主跨108 m,桥宽11.5 m,矢跨比1/11.74,采用双层桥面布置,拱顶处互通。桥梁设计采用下穿式斜拉-拱桥组合结构体系,降低了拱脚水平力,提高了主拱刚度。拱肋采用分离式钢箱截面,截面高1.2 m,高跨比1/90,拱脚采用PBL剪力键与混凝土拱座连接。主梁采用1.2 m高焊接工字钢梁,拱梁之间采用钢管立柱连接。桥塔采用现浇变截面混凝土斜塔,塔高13.04 m,倾角37.06°,塔顶3.75 m为锚索区,采用混凝土外套钢帽的构造。拉索采用镀锌钢丝拉索体系,主索及背索上端交叉锚固于混凝土桥塔上,主索下穿拱肋段采用“钢管内置定位器”构造,背索下端通过锚拉板锚固于背索承台上。基础采用Φ150 cm钻孔灌注桩。为控制人致振动加速度,在跨中和四分点处设置TMD,达到了良好的人行舒适度。The Yanluo Footbridge on Maozhou River Greenway in Shenzhen is a combined stress-ribbon and deck-type arch bridge with a main span of 108 m,and the rise-to-span ratio of the arch reaches 1/11.74.The bridge is 11.5 m wide,the level of roadway carried by the arch ring and the level of roadway supported on the steel tubular spandrel columns coincide at the arch crown.The combination of stress-ribbon and deck-type arch structures reduces the horizontal force of arch springs and improves the stiffness of the arch ring.The arch ring has a split steel box cross-section that measures 1.2 m deep,with a depth-to-span ratio of 1/90.The arch springs are connected with concrete arch seats via PBL connectors.The deck consists of 1.2 m-deep welded I steel beams.The two pylons are cast-in-situ concrete pillars of variable cross-section,rising 13.04 m and each leaning 37.06°towards the adjacent abutment.The top 3.75 m-long section of the pylon is where the cable is anchored,which consists of the core concrete and the external steel cap.The cables are galvanized steel wire cables,and the main cable and the upper end of the back cable are crossed and anchored to the concrete pylon.The main cable is threaded through a steel tube embedded in the arch rib which also serves as a positioning device,and the back cables are anchored to specialized pile caps via tensile anchor plates.The pylons are supported by foundation of bored piles of Φ150 cm diameter.To control the acceleration of human-induced vibrations,TMDs are installed at midspan and quarter points of the deck,to improve the human comfort on the bridge.

关 键 词：人行桥 下穿式斜拉-拱桥组合结构体系 双层桥面 PBL剪力键 斜塔 钢管内置定位器 TMD 桥梁设计 

分 类 号：U448.11[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]