武汉西四环汉江特大桥总体设计  

Overall Design of Xisihuan Hanjiang River Bridge in Wuhan

作　　者：舒江[1] 师少辉[1] 朱玉[1] 

机构地区：[1]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《桥梁建设》2017年第6期84-88,共5页Bridge Construction

摘　　要：湖北省武汉市西四环线汉江特大桥主桥为(77+100+360+100+77)m双塔双索面半飘浮体系预应力混凝土斜拉桥,引桥为3×65m预应力混凝土现浇连续箱梁桥。主桥桥塔采用H形结构,两桥塔塔高分别为130.1m和126.1m;主梁采用双边箱PK断面,整幅宽43.6m,按全预应力构件设计;斜拉索采用热镀锌钢绞线,按双索面扇形布置,每个塔柱布置28对斜拉索,全桥共224根;索塔锚固采用改进的紧凑型钢锚梁,并在索导管出口附近设预应力钢棒进行斜拉索锚下局部防裂。分别采用MIDAS Civil和ANSYS对主桥进行总体和局部计算,结果表明结构各项指标均满足规范要求。The main bridge of the Xisihuan(West Fourth Ring Road)Hanjiang River Bridge in Wuhan City,Hubei Province is a semi-floating system prestressed concrete cable-stayed bridge with double pylons,double cable planes and with span arrangement(77+100+360+100+77)m and the approach bridges of the bridge are the cast-in-situ prestressed concrete continuous box girder bridges with span arrangement 3×65 m.The two pylons of the main bridge take the H shape and the height of the pylons is respectively 130.1 mand 126.1 m.The cross section of the main girder is the PK(Pasco-Kennewick Bridge)section of double edge boxes.The whole width of the girder is 43.6 mand the girder is designed according to the full prestressed component.The stay cables are made up of the hot-dip galvanized steel strands and are arranged in fan shape in double cable planes.On each column of a pylon,28 pairs of the cables are arranged and on the whole bridge,totally 224 cables are provided.For the stay cable anchorage in a pylon,the improved compact steel anchor beams are applied and nearby the exits of the cable ducts in the anchorage,the prestressing bars are arranged for the purpose of preventing the local cracking under the cable anchors.The MIDAS Civil and ANSYS are respectively used to carry out the global and local calculation of the main bridge and the results of the calculation indicate that the various indices of the structure can satisfy the relevant requirements in the codes.

关 键 词：斜拉桥 预应力混凝土结构 H形桥塔 双边箱PK断面 宽幅桥面 热镀锌钢绞线 紧凑型钢锚梁 有限元法 

分 类 号：U448.27[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]