Introduction to Zhoushan Xihoumen Bridge?

Zhoushan Xihoumen Bridge is the world’s longest-span steel box girder suspension bridge jointly constructed by Sichuan Highway and Bridge Construction Group Co., Ltd. and China Communications Second Public Transport Bureau. Xihoumen Bridge is a super-large cross-sea bridge with the highest technical requirements among the five cross-sea bridges in the Zhoushan Island Link Project that connects the main island of Zhoushan to Ningbo. The main bridge is a two-span continuous semi-floating steel box girder suspension bridge with a main span of 1,650 meters. It currently ranks second in the world and first in China in terms of suspension bridges. Among them, the total length of the steel box girder ranks first in the world. The design navigation grade is 30,000 tons and the service life is 100 years. The bridge has the advantages of high technical difficulty, many scientific and technological innovations, and high wind resistance.

Introduction to the bridge

The Xihoumen Bridge is located in a sea area frequently affected by typhoons. The bridge is located in complex hydrological, geological and climatic conditions. However, our country has not yet built a super large bridge on the wide sea surface in a typhoon area. Practical precedent for long-span steel box girder suspension bridges. All bridge builders adhered to concept innovation, management innovation and technological innovation, implemented refined management, overcame difficulties, worked hard, and overcame one difficulty after another. When the two typhoons "Weipa" in mid-September and "Rosa" in early October 2007 hit Zhoushan, the measured maximum wind force on the Xihoumen Bridge reached level 13. The bridge, which was in the girder erection period, successfully withstood the test. . At present, the feasibility study report of the National Science and Technology Support Plan project based on the construction of the Xihoumen Bridge - "Research on Key Technologies and Engineering Demonstration of Extra-Long Span Steel Box Girder Suspension Bridge across the Sea" has been hosted by the Ministry of Science and Technology and the Ministry of Transport. The expert demonstration meeting will be reviewed and passed.

The 50-kilometer-long Zhoushan Island Connecting Project is a key project in Zhejiang Province and one of the "Five Ten Billion Projects". Upon completion, Zhoushan's transportation will be fully integrated into the Yangtze River Delta expressway network.

At 11:18 am on December 16, 2007, the 126th section of the steel box girder of the Xihoumen Bridge of the Zhoushan Island Link Project was hoisted and connected. At this point, the world's longest steel box girder suspension bridge—— The main bridge of Xihoumen Bridge was announced to be fully connected.

Construction History

On February 1, 2005, the National Development and Reform Commission approved the construction of the Jintang Bridge.

On May 20, 2005, the construction of Xihoumen Bridge officially started.

On March 31, 2006, the overall pre-assembly of the steel box girders of the Xihoumen Bridge began.

On April 10, 2007, the main cables of the Xihoumen Bridge were completely erected.

On December 16, 2007, the installation of the 126th section of the steel box girders of the Xihoumen Bridge was completed, and the main bridge was connected.

On July 15, 2009, the asphalt paving of the 32-kilometer main bridge (road) surface of Xihoumen Bridge and Jintang Bridge was completed.

On December 25, 2009, the Xihoumen Bridge was completed and opened to traffic.

The best bridge in the world

With a main span of 1,650 meters, it currently ranks second in the world and first in China in terms of suspension bridges;

The world's first split steel box girder suspension bridge , the main bridge is a two-span continuous semi-floating steel box girder suspension bridge;

The total length of the steel box girder ranks first in the world;

The main cable length of the Xihoumen Bridge is 2882 meters, which was the longest at that time No. 1 in the country;

The Xihoumen Bridge construction catwalk was 2,808 meters long, the longest in the country at that time;

The first domestically developed main cable strand horizontal loop laying technology;

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The steel wire rope slings with the longest length, largest diameter and highest strength in the country at that time were used in the construction;

The cable tower of the bridge was 211.286 meters tall, which was the tallest tower of the domestic suspension bridge at that time;

The Xihoumen Bridge is one of the bridges with the highest wind resistance requirements in the world. It uses a split steel box stiffening beam that has no precedent in the world, meeting the wind resistance stability requirements, and the critical wind speed for flutter reaches 88 meters. / second or more, and can withstand level 17 super typhoons.

Award status

The key technology research results of the new split steel box girder of the Xihoumen Bridge have reached the international leading level and won the first prize of the 2008 China Highway Society Science and Technology Award.

At the 27th American International Bridge Conference, the Xihoumen Bridge won the Gustav Lindshal Award for its outstanding achievements in engineering structure, aesthetic value, and environmental harmony.

The results of the 2015 FIDIC (also known as the International Federation of Consulting Engineers) engineering project awards were announced. China's Zhoushan Continental Island Connecting Project Xihoumen Bridge won the Outstanding Project Award. The award is also known as the "Nobel Prize" of architecture.

Construction Significance

The Xihoumen Bridge is the extra-large cross-sea bridge with the highest technical requirements among the five cross-sea bridges in the Zhoushan Island-Connecting Project. It is a key project in Zhejiang Province and one of the "Five Major One of the "Ten Billion" projects. After the completion of the project, Zhoushan transportation will be integrated into the highway network of the Yangtze River Delta, which will be conducive to the development of Zhoushan port resources and effectively promote the Ningbo-Zhoushan port integration process. In the Hangzhou Bay area and the Yangtze River Delta region plays an important role in economic development.

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