The world's first high speed railway arch bridge of steel-concrete composite closure in Guizhou province (photo) | | Gao Tiegang | arch bridge concrete arch bridge in Guizhou province _ news
The world's first Gao Tiegang concrete arch bridge
The world's first Gao Tiegang concrete arch bridge

CCTV News: Yachi River Bridge completed in Guizhou steel truss arch closure marked the major stage victory for the expensive high-speed rail construction. This bridge can be rated as China's most difficult mountain railway arch bridge, the engineers used two words to describe: first dance on the tip, the second is needlepoint embroidery.

Yachi River Bridge is the world's first Gao Tiegang concrete arch bridges, combined cable-stayed steel truss bridge, and many other types of bridge technology, across the bridge and there are a number of novel structure, bridge design and construction are of guiding significance. Meanwhile, are China's most difficult mountain railway arch.

Bridge is located in the Gorge, instantaneous wind speed up to ten levels, the whole process of assembling steel arch, including cable construction, particularly high wind resistance requirements. Tata top cable distances in Yachi River waters is 110 stories high, and the biggest single lifting weights up to 270 tons, control is difficult, construction safety risk is extremely high, almost dancing on the tip. Connections are plug welding of steel truss arch way on Machining accuracy and installation requirements are very high, described by engineers as "needle embroidery".

Cheng Gui high-speed rail in 2019, completed the opening, to Guiyang, Chengdu after the opening time will be reduced from nearly 20 hours last about 2 hours.

Responsible editor: Kang Yunkai

Article keywords:
Gao Tiegang arch bridge concrete arch bridge in Guizhou province

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世界首座高速铁路钢混结合拱桥在贵州合龙(图)|拱桥|高铁钢混结合拱桥|贵州_新闻资讯
世界首座高铁钢混结合拱桥
世界首座高铁钢混结合拱桥

　　央视网消息：贵州鸭池河特大桥顺利完成钢桁拱合龙，标志着成贵高铁建设取得重大阶段性胜利。而这座桥堪称中国目前最难修的山区铁路拱桥，工程师用了两句话来形容：一是刀尖上跳舞，二是针尖上绣花。

　　鸭池河特大桥是世界首座高铁钢混结合拱桥，融汇了钢桁梁桥、斜拉桥等多种类型的桥梁工艺，在桥跨和结构上有多项创新，对同类桥梁设计施工具有指导性意义。同时，也堪称中国目前最难修的山区铁路拱桥。

　　大桥位于峡谷之中，瞬时风速最大可达十级，对整个钢拱拼装过程，包括缆索吊施工过程，抗风要求特别高。缆塔塔顶距离鸭池河水面有110层楼高，而最大单件吊装的重量达270吨，控制难度大，施工安全风险极高，几乎是刀尖上跳舞。而钢桁拱连接是采取栓焊结合方式，对加工精度和拼装要求非常高，被工程师形容为“针尖上绣花”。

　　成贵高铁预计于2019年峻工通车，通车后成都到贵阳的时间将从过去的将近20小时缩短至大约2小时。

责任编辑：康云凯

文章关键词：
拱桥 高铁钢混结合拱桥 贵州

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