Jiaxing-Shaoxing Sea Bridge

The Jiaxing-Shaoxing Sea Bridge (simplified Chinese: 嘉绍跨海大桥; traditional Chinese: 嘉紹跨海大橋; pinyin: Jiā Shào Kuà Hǎi Dàqiáo), sometimes shortened to Jiashao Bridge, is the world's longest and widest multi-pylon cable-stayed bridge. From end to end, it stretches 10.14 km (6.3 mi) across the Qiantang River estuary, at Shaoxing, Zhejiang, China. The main bridge is 2,680 m (8,790 ft) long and 55.6 m (182 ft) wide and carries an expressway with eight traffic lanes. Construction started December 2008, and the toll bridge opened for traffic on July 20, 2013.

Jiaxing-Shaoxing Sea Bridge

嘉兴至绍兴跨海大桥
The Jiashao Bridge
Coordinates30.240587°N 120.776049°E / 30.240587; 120.776049
Carries8 lanes of G15W expressway
CrossesQiantang River estuary
LocaleShaoxing, Zhejiang, China
Other name(s)Jiashao Bridge
OwnerZhejiang Jiashao Bridge Investment and Development Company[1]
Characteristics
MaterialSteel and concrete
Total length10,138 metres (33,261 ft)[2]
Width55.6 metres (182 ft)
Height227 metres (745 ft) (supporting pylons)
Longest span428 metres (1,404 ft)
No. of spans5
History
Constructed byChina Railway Baoji Bridge Group
Construction startDecember 2008
Construction endJune 17, 2013 (2013-June-17)
Construction cost¥13.9 billion (US $2.23 billion)[3]
Statistics
Toll40 yuan
Location

Jiashao is the second sea-crossing bridge built in the greater Hangzhou Bay area. It is about 50 km (31 mi) west of the longer 35.67 km (22.2 mi) Hangzhou Bay Bridge, which opened May 2008, a half year before construction began on the Jiashao.[4]

Design
Jiashao Bridge, six pylons under construction, along with the northern approach

As with the Hangzhou Bay Bridge, the design of the Jiashao had to take into account the raging tidal bore and swift current of the Qiantang River estuary. To roll with the famous Qiantang tidal bore and to reduce the construction risks under difficult hydrologic conditions, the substructure foundation design for the southern and northern bridge approaches called for the elimination of the traditional pile cap and the use of a single pile and flexible column type with a large pile diameter of 3.8m and a very long pile length of 111m. This presented a relatively small water-blocking area for the 150 piles, which had a small influence on hydrology and avoided the risk of cofferdam construction from the tidal bore. For the main six-pylon bridge foundation, the large pile cap was moved down to below the mud surface of the riverbed, thus presenting only the single pylon column tied directly to the pile cap as the water-blocking area of each of the six main pylons of the cable-stayed bridge.[5][6]

The main multi-span cable-stayed bridge is 2,680 m (8,790 ft) long from abutment to abutment and is mostly supported by six 227 m (745 ft) tall pylons, each with two sets of two-plane harps of cable stays to sustain two box-girder carriageways, one on either side of the pylons. The two box-girder carriageways are tied transversely to one another for stability and rigidity throughout the length of the main multi-span bridge, with a total main bridge steel box-girder deck width of 55.6 m (182 ft) carrying eight lanes of traffic. [7][8]

The bridge crosses the estuary of Qiantang River, from the banks of north-east Shaoxing northward, making landfall south of Jiaxing. Shaoxing is located about 200 km from Shanghai. This bridge will provide a more direct route for vehicle traffic between Shanghai and Shaoxing. The bridge is intended for motorists travelling above speeds of 60 miles per hour; vehicles with a maximum speed of less than 45 miles per hour are not allowed to cross.

The Jiashao Bridge was given the IRF Award in 2016[5] and the FIDIC Award of Special Merit for 2017.[9]

See also

Sources

References
  1. "Jiashao Bridge". fidic.org. Retrieved 20 May 2020.
  2. "Jiashao Cross River Bridge is expected in the second half to traffic Jiaxing-Shaoxing only 1 hour - Best News". Best-news.us. 2013-02-06. Retrieved 2013-12-31.
  3. "Jiaxing-Shaoxing sea bridge soon to reduce travel time to Shanghai". Archived from the original on 4 March 2016. Retrieved 19 June 2013.
  4. "The world's longest cable-stayed bridges". roadtraffic-technology.com. February 2014. Retrieved 20 May 2020.
  5. "Winning Project Profile: Design, Jiashao Bridge Project". irf.global. December 2016. Retrieved 20 May 2020.
  6. "Jiashao Bridge". dynatronic-tech.com. November 2019. Retrieved 20 May 2020. Dynatronic was invited to participate in the bridge inspection, such as testing the tower pulsation and other test items on the bridge.
  7. Nicolas Janberg, Chief Editor (2008-12-15). "Jia-Shao Bridge (Jiaxing, 2012) | Structurae". En.structurae.de. Retrieved 2013-12-31.
  8. Wang, Rengui; Lin, Daojin (January 2013). "The Design and Construction for Steel Box Girder of Jiashao Bridge". trid.trb.org. Washington DC, USA: Transportation Research Board 92nd Annual Meeting Compendium of Papers. Retrieved 20 May 2020.
  9. "FIDIC Awards 2017 - Results". FIDIC, the International Federation of Consulting Engineers. Retrieved 22 May 2020.
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