南京花山大桥主桥设计

Design of Main Bridge of Huashan Bridge in Nanjing

南京花山大桥为(100+50+100)m倾斜拱塔斜拉桥,拱塔在立面上呈倾斜状,拱塔内部斜拉索呈交叉索网状布置。经过方案比选,该桥采用塔墩固结、塔梁间设竖向支承及抗推支承的结构体系。钢拱塔高82.31 m,采用八边形断面,桥塔底部通过钢-混结合段与混凝土拱脚相连。钢主梁采用分离式双箱断面,梁高2.8 m、宽34.3 m。斜拉索分为外斜拉索、内斜拉索及系杆拉索3类,均采用平行钢丝索,按空间双索面布置。主梁及桥塔均采用分节段浮运、吊装后焊接成型的施工方案。

The Huashan Bridge in Nanjing is a cable-stayed bridge with three spans of 100,50 and 100 m,which features its inclined arch-shaped pylon and the network cable planes in between the arch rings.By scheme comparison,a structural system involving the fixed pylon-pier connection,vertical bearings between pylon and girder and thrust restraints was chosen.The steel arch pylon,which is of octagonal cross section and rises 82.31 m,is connected with the concrete springs via the base steel-concrete joint section.The superstructure consists of separated double boxes,2.8 m deep and 34.3 m wide.The stay cables that all comprise parallel steel wires and are arranged in spatial double cable planes are categorized into three groups,including the external cables,inner cables and tiebar cables.The main girder and pylon were prefabricated and delivered in sections,and welded to take shape after being hoisted into position at bridge site.