The "progress bar" construction of the West Extension High Speed Rail has the largest span and the highest height bridge to achieve the main pier.

On the morning of July 15th, the main control project of the West Extension High Speed ​​Railway, the main pier of the Wangjiahe Extra Bridge, was capped smoothly. This is the largest and most height bridge across the West Extension high -speed rail. The same type of structural span and the highest height bridge. The main pier of the bridge has marked major node progress in the construction of the entire bridge project of the West Extension High Speed ​​Railway, and also provides valuable construction experience for domestic high -pier large spans and continuous steel structures.

It is understood that the West Yan High -speed Railway Wangjiahe Bridge is located in Wangyi District, Tongchuan City, with a total length of 1066 meters. The rectangular hollow pier design is the highest pier in the 16 bridge pier in the whole bridge. Due to the use of traditional construction technology and methods with high spans, there are difficulties in construction difficulties and high safety risks, the construction unit Xichengke Shaanxi Company organizes relevant design and conducts special research on construction units. High -intensity High -intensity Hard rock pile base construction, large volume of concrete construction, ultra -high rectangular hollow thin -wall high -pier turning model construction and other technical problems.

Xi'an to Yan'an high -speed railway is the first high -speed rail in the old revolutionary district of northern Shaanxi. As an important part of the national high -speed railway network bag (silver) sea high -speed railway channel, it forms a North -South large channel with the planned West -Chongqing high -speed rail. Key construction projects during the period. The total length of the line is 299.8 kilometers. The construction standard is a dual -line high -speed railway with a design speed of 350 km/h. After the establishment of the line into operation, the operation time from Xi'an to Yan'an will be shortened from the current two and a half hours to about 1 hour. It is of great significance to optimize the national high -speed railway network layout, enhance the advantages of Shaanxi Province, and the national railway network hub.

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