【摘要】 武汉三官汉江公路大桥主桥为主跨190m的双塔预应力混凝土部分斜拉桥,介绍该桥主桥设计与施工。主桥采用塔、墩、梁固结体系;主梁采用大悬臂变截面预应力混凝土连续箱梁;桥塔设计为古琴造型,采用独柱形四面镂空截面形式,索塔锚固采用单根可更换式锚固系统;斜拉索采用竖琴式中央索面布置;主墩采用实体双薄壁圆倒角矩形墩、钻孔灌注桩基础。主墩承台采用钢管桩围堰施工,墩身及塔柱采用爬模施工,主梁采用悬臂浇筑法施工。更多还原

【Abstract】 The main bridge of Sanguan Hanjiang River Highway Bridge in Wuhan is a prestressed concrete(PC) extradosed bridge with double pylons and with a main span of 190 m.The design and construction of the bridge are presented herein.Structurally,the main bridge adopts the fixed pylon-pier-girder system;the main girder is the long-cantilever PC continuous box girder with variable cross section;the pylon is designed as a single column pylon,which is zither-shaped,with four grooved walls;the cable-to-pylon anchorage system allows the replacement of individual stay cables;the stay cables are arranged in harp-shaped central cable planes;the main pier is the rectangular solid double-thin-wall pier with round ends,sitting on the bored pile foundation.In the respect of construction methods,the steel pipe pile cofferdam is used in the construction of the pile cap of the main pier,climbing formworks are used in the construction of the pier shafts and pylon legs,and the cantilever casting method is taken in the construction of the main girder.更多还原