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Major Technique Improvement of Jiangyin Bridge over Yangtse River

机译:江阴桥江阴桥的主要技术改进

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Jiangyin Bridge over Yangtse River, located at the middle of Jiangsu Province and 200 km west to Shanghai, is a suspension bridge with a main span of 1385m , which was opened to traffic in September 1999. This Bridge is the main crossing project in the two arterial highways, one from Beijing to Shanghai and the other along the coastline. This paper mainly deals with its general information and the problems encountered in the construction, such as soil layer stability of anchorage block, the quality of the main cables, the manufacture and construction of the box girder and the pavements. The north anchorage is settled in alluvial soil, bedrock's embedded deep about 90m under soil. After comparison, the open caisson with the embedded depth of 58m was chosen, and special measures were chosen to guarantee its stability and small displacement. The main cables were constructed with PWS method, in addition, a series of methods like controlling the rotation of strands were adopted to ensure quality. The void ratio of the main cables is 16.6%. To ensure the quality of the assembling of box girders, long line framework method was used; welded seam shrinkage and camber was left before welding, so welding session was trouble-free. Although paving bituminous concrete on the steel box girder in the temperature range from -15°C to 70°C is very difficult, the main goal was reached by the co-operation of experts from home and abroad.
机译:江阴大桥在江苏省中部和西部到上海200公里,是一个悬架桥,主要跨度为1385米,于1999年9月开放。这座桥是两者的主要横穿项目动脉高速公路,一个从北京到上海和其他海岸线。本文主要涉及其一般信息和在施工中遇到的问题,如土壤层稳定性的锚固块,主电缆的质量,箱梁的制造和构造和铺路。北锚定落在冲积土中,基岩在土壤下嵌入大约90米。比较后,选择嵌入深度为58米的开放式沉箱,选择特殊措施以保证其稳定性和小位移。主电缆采用PWS方法构建,另外,采用了一系列类似于控制股线旋转的方法以确保质量。主电缆的空隙率为16.6%。为确保箱梁组装的质量,使用了长线框架方法;在焊接前焊接缝缝收缩率和弯煤,因此焊接会议无故障。虽然在-15°C至70°C的温度范围内铺设沥青混凝土距离-15°C至70°C是非常困难的,但主要目标是由国内外专家的合作达到的主要目标。

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