Sutong Bridge is a cable-stayed steel box girder bridge with a main span of 1 088 m.The erection of upper structure adopts geometry control method and requires no change to the unit's size and the structure's ...Sutong Bridge is a cable-stayed steel box girder bridge with a main span of 1 088 m.The erection of upper structure adopts geometry control method and requires no change to the unit's size and the structure's none-stress geometry.Before main span closure,the cantilever of girder reaches 540.8 m,the structure state is noticeably influenced by external circumstances,the main span closure face great difficulty.By abstracting the advantage of the pullback method abroad and the domestic temperature-cutting method,a new assistant pullback method have put forward and bring into practice actually.In this paper,the analysis key point of practice conditions,key parameter of practice,main measures of the method and the performance is introduced.展开更多
以湖南省张花高速酉水河大桥4×40+80+145+80 m预应力混凝土连续T梁和斜高墩大跨径预应力混凝土连续梁桥桥为工程背景,引桥40 m T梁和主桥18个悬臂节块同时施工,引桥40 m T梁制、架先于主桥完工,根据酉水大桥4#交接墩墩身高度达57 ...以湖南省张花高速酉水河大桥4×40+80+145+80 m预应力混凝土连续T梁和斜高墩大跨径预应力混凝土连续梁桥桥为工程背景,引桥40 m T梁和主桥18个悬臂节块同时施工,引桥40 m T梁制、架先于主桥完工,根据酉水大桥4#交接墩墩身高度达57 m、直线段长度为6.5 m及直线段混凝土方量为106.85 m3等特点,在架设完成的40 m T梁上布置贝雷片吊架作为施工4#交接墩边跨直线段的主要施工设备,直线段施工完成后边跨进行合龙,简述吊架构造,介绍边跨现浇段吊架施工工艺和边跨合龙张拉等关键工序,对同类桥梁加快工程施工进度和节约投资有重要指导意义。展开更多
基金National Science and Technology Support Program of China(No.2006BAG04B03)
文摘Sutong Bridge is a cable-stayed steel box girder bridge with a main span of 1 088 m.The erection of upper structure adopts geometry control method and requires no change to the unit's size and the structure's none-stress geometry.Before main span closure,the cantilever of girder reaches 540.8 m,the structure state is noticeably influenced by external circumstances,the main span closure face great difficulty.By abstracting the advantage of the pullback method abroad and the domestic temperature-cutting method,a new assistant pullback method have put forward and bring into practice actually.In this paper,the analysis key point of practice conditions,key parameter of practice,main measures of the method and the performance is introduced.
文摘以湖南省张花高速酉水河大桥4×40+80+145+80 m预应力混凝土连续T梁和斜高墩大跨径预应力混凝土连续梁桥桥为工程背景,引桥40 m T梁和主桥18个悬臂节块同时施工,引桥40 m T梁制、架先于主桥完工,根据酉水大桥4#交接墩墩身高度达57 m、直线段长度为6.5 m及直线段混凝土方量为106.85 m3等特点,在架设完成的40 m T梁上布置贝雷片吊架作为施工4#交接墩边跨直线段的主要施工设备,直线段施工完成后边跨进行合龙,简述吊架构造,介绍边跨现浇段吊架施工工艺和边跨合龙张拉等关键工序,对同类桥梁加快工程施工进度和节约投资有重要指导意义。
