Xinguang Bridge

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Coordinates: 23 ° 3 ′ 10 ″  N , 113 ° 19 ′ 18 ″  E

Xinguang Bridge
新光 大桥
Xinguang Bridge 新光 大桥
use Road bridge
Convicted Xinguang Expressway
Crossing of Pearl river
place Guangzhou
overall length 1083.2 m
width 37.22 m
Number of openings three
Longest span 177 + 428 + 177 m
Clear height 34 m
start of building 2004
completion 2006
opening January 20, 2007
location
Xinguang Bridge (Guangdong)
Xinguang Bridge

The Xinguang Bridge ( Chinese  新光 大桥 , Pinyin Xīnguāng dàqiáo ) is a road bridge in Guangzhou in the Chinese province of Guangdong . It runs the Xinguang Expressway over the main arm of the Pearl River and connects the Haizhu district with an island south of the Pearl River that belongs to the Panyu district.

description

The Xinguang Expressway is a 6-lane urban motorway that runs as an elevated road for around 4 km .

The Xinguang Bridge crosses the Pearl River at a height of over 34 m with one large and two smaller red steel arches on a V-shaped concrete frame.

The bridge structure, including the crossing of a small side canal and the connections to the elevated road, is a total of 1083.2 m long. The arches including the frame bases have pillar spacing of 177 + 428 + 177 m, a total of 782 m. The bridge is 37.22 m wide. Between the steel arches, it has two separate, 12 m wide directional lanes with three lanes each and a 3 m wide sidewalk each mounted on the outside.

The bridge was built on bored piles with a diameter of 2.6 m that reached down to solid rock.

The V-shaped frames are made of prestressed concrete ; their inclined posts are hollow boxes , while the horizontal girders are made of solid concrete with numerous tendons . They are statically designed as a frame .

The steel arched ribs consist of two hollow boxes connected by a framework. The ribs are 12 m high at the base of the arch and taper to 7.5 m at the apex. In the large arch the ribs are stiffened by 7, in the small arches by two individual wind braces. The ends of the arch ribs of the large arch are connected to each other by 8 tensioning cables that absorb the horizontal forces of the arch ribs. They can be adjusted and exchanged individually. In the two lateral arches, 16 tendons each in the longitudinal beams of the bridge panel perform this task. The arched ribs are firmly connected to the V-shaped frame. At the outer ends of the side arches there are pillars , the bearings of which allow a longitudinal movement of 200 mm.

The carriageway girder of the middle opening is a composite construction of 9 steel longitudinal and 41 cross girders and reinforced concrete prefabricated slabs. The track girders of the side openings consist of prestressed concrete T-beams.

The carriageway girders are attached to the arched ribs with parallel wire ropes. You can move in the longitudinal direction. Transition structures at both ends of the lateral arched ribs compensate for changes in length of the roadway girders due to temperature fluctuations.

Large ship deflectors are located under the main opening to protect the bridge from collisions.

Web links

Individual evidence

  1. ↑ The following information is based on the contribution by Yue Li, Jianfeng Zhang, Ping Huang, Banfu Yan: Design and construction of a rigid-frame steel truss. In: Chinese-Croatian Joint Colloquium, Long Arch Bridges, Brijuni Islands, July 10-14, 2008. pp. 439-446.
    A largely identical article was published by Yufeng Xu, Yue Li: Design of a Rigid-frame Steel Truss Arch Bridge. In: 2017 2nd International Conference on Architectural Engineering and New Materials (ICAENM 2017). ISBN 978-1-60595-436-3 , pp. 606-612.