China's largest span road-railway steel arch bridge closure (picture) | road-railway bridge _ news

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This morning, China's biggest road-railway steel arch bridge span-the natural channel of Shanghai road railway bridge bridge was the closure marks the Shanghai railway construction to achieve substantive progress.

Natural channel bridge in Shanghai Road-Railway Bridge North of the bridge main span of 336 meters, is currently the world's largest long-span Highway and railway dual-use flexible arch bridge with rigid beams.

Zhang Yan-Fei, head of survey and Design Institute, Shanghai-Nantong bridge iron bridge design:

Its traffic rank high, height of the navigation clear width requirements are relatively high; the steel arch bridge, its stiffness, suitable for high-speed rail cars.

Due to road and rail while passing on bridge load requirements, force the most critical areas of natural channel bridge was first adopted the Chinese developed independently of Q500 highest strength steel for bridges; each Member's accuracy and closure when temperature has precise requirements.

Cccc AVIC II and Shanghai Tang Qi Tong bridge project manager:

Drilling accuracy at 0.3 mm, all of the Group's structure is bolted, one of our most complex nodes need 17 rods need to be installed in the direction of, 450,000 bolts on the bridge, requested can't be wrong all the bolt holes, once the installation is successful.

Bridge is overcome during construction of large-span continuous steel trussed girder without closure a number of key technologies, such as stress, lay the Foundation for full bridge open to traffic.

[Backgrounder] span the world's largest road-railway bridge

Today the closure of natural channel bridge is under construction in Hong Kong-Shanghai-Nantong Yangtze River Bridge project on the north shore of and as the largest road-railway bridge span in the world, Shanghai-Nantong Yangtze River Bridge is created a number of new materials, new processes, new structures and new equipment.

Shanghai-Nantong Yangtze River Bridge is China's coastal railway corridor in the control of Shanghai Railway project, the upper for the two-way six-lane highway, lower for double-Shanghai Railway intercity passenger and double line through her, bridge North, Nantong, Zhangjiagang city, South Bank. Special channel for North across the bridge was born in Hong Kong, a main span of 336 metres, currently the world's largest long-span Highway and railway dual-use flexible arch bridge with rigid beams. Across the main channel of the Yangtze River on the South side of the bridge, 1092 m main span of steel truss girder cable-stayed bridge, currently the largest span road-rail cable-stayed bridge in the world. Main tower as high as 325 meters, approximately 100 floors high, is the world's highest road-rail cable-stayed bridge pylon. In order to improve the stability of the main tower and the torsional stiffness of Tower, main towers in addition to the diamond-shaped concrete structure, has also developed the world's most high-strength cables. After the bridge was built to carry the upper six-lane highways, lower four-track railway running, this overload of the large-span and unprecedented. Builder in addition to develop strength, toughness, weldability and tensile better outside the new steel, main bridge box girder of the new structure is adopted for the first time, the newly developed the world's largest walking beam crane lifting force.

Shanghai Railway 137 km in length, located East West station, North Station in Zhangjiagang, Nantong, Zhangjiagang, Taicang, Changshu and Taicang port station, Anting, huangdu 9 stations. Jiangsu Province, of which 119. Kilometers, Shanghai 17.74 km, design speed 200km/h, project investment of 36.8 billion yuan, construction period of 5.5 years, will be built at the end of 2019.

>: Tang Kun Qu SN117

Article keywords:
Road-railway bridge

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中国跨度最大公路铁路两用钢拱桥合龙(图)|公路铁路两用桥_新闻资讯
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　　今天上午，中国跨度最大的公路铁路两用钢拱桥——沪通公路铁路大桥天生港航道桥顺利合龙，标志着沪通铁路建设取得阶段性进展。

　　天生港航道桥位于沪通公路铁路两用大桥北侧，大桥主跨336米，是目前世界上最大跨径的公路铁路两用刚性梁柔性拱桥。

　　中铁大桥勘测设计院沪通大桥设计负责人 张燕飞：

　　它的通航等级高，对通航的净高净宽要求比较高；采用钢拱桥，它的刚度大，适合高速铁路跑车。

　　由于公路铁路同时通行对大桥荷载的要求，天生港航道桥受力最关键的区域首次采中国自主研制的Q500最高强度桥梁用钢；每一个杆件的精度和合龙时的温度都有精确要求。

　　中交二航局沪通大桥项目部经理 唐启：

　　制孔精度控制在0.3毫米，所有的组行结构都是通过螺栓连接，我们最复杂的一个节点需要17个方向的杆件需要安装，桥上有45万个螺栓，要求所有的螺栓都不能错孔，要一次安装成功。

　　大桥施工中攻克了大跨度连续钢桁梁无应力合龙 等一系列关键技术，为全桥通车打下基础。

　　[新闻背景]世界跨度最大的公路铁路两用桥

　　今天合龙的天生港航道桥是正在建设的沪通长江大桥的北岸工程；而作为世界上跨度最大的公路铁路两用大桥，沪通长江大桥更是催生了多项新材料、新工艺、新结构和新装备 。

　　沪通长江大桥是中国沿海铁路大通道中沪通铁路的控制性工程，上层为双向六车道高速公路，下层为双线沪通铁路和双线通苏嘉城际客运专线，大桥北岸为南通市，南岸为张家港市。大桥北侧跨越天生港专用航道，主跨336米，为目前世界上最大跨径的公路铁路两用刚性梁柔性拱桥。大桥南侧跨越长江主航道，采用主跨1092米的钢桁梁斜拉桥结构，为目前世界上最大跨径的公路铁路两用斜拉桥。大桥主塔高达325米，约100层楼房高，也是世界最高公路铁路斜拉桥的主塔。为了提高主塔的稳定性及塔柱的抗扭刚度，主塔除了采用了钻石型混凝土结构外，还研发出了目前世界上最高强度的斜拉索。大桥建成后要承载上层六车道高速公路、下层四线铁路的运行，这样的大跨度和重载量都前所未有。建设者除了研制出强度、韧性、可焊性、拉伸性更好的新型钢材外，主航道桥还首次采取了箱桁组合的新结构，新研发了世界上吊装力最大的步履式架梁吊机。

　　沪通铁路全长137公里，设平东站、南通西站、张家港北站、张家港站、常熟、太仓港站、太仓站、安亭、黄渡等9个车站。其中江苏省119。公里，上海市17.74公里，设计行车速度200km/h，工程投资 368 亿元，建设工期5年半，将于2019年底建成。

>责任编辑：瞿崑 SN117

文章关键词：
公路铁路两用桥

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