Narrows Bridge (Perth)
Coordinates: 31 ° 57 ′ 48 ″ S , 115 ° 50 ′ 49 ″ E
| Narrows Bridge | ||
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| use | Road and rail bridge | |
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| Crossing of | Swan River | |
| place | Perth | |
| construction | Prestressed concrete bridge , steel box girder bridge | |
| overall length | 336 m | |
| width | 62 m | |
| Number of openings | five | |
| Longest span | 97.5 m | |
| start of building | 1957, 1999, 2005 | |
| completion | 1959, 2001, 2007 | |
| planner | G. Maunsell & Partners u. a. | |
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The Narrows Bridge is a highway and railroad bridge over the Swan River in Perth , Western Australia .
The bridge connects Perth city center with South Perth, the southern suburbs and the state's southwest coast. It stands on a short, narrow stretch of river called The Narrows , between the two very wide, lake-like stretches of the river, Perth Water to the east and Melville Water downstream.
It leads the State Road 2 over the river and thereby connects the Mitchell Freeway called northern part of the S2 with the Kwinana Freeway in the south. In the middle of the bridge are two tracks on the Perth – Mandura railway line .
description
The structure is 336 m (1100 ft ) long between the abutments . It is around 62 m wide and contains (from west to east) a pedestrian and bike path, five vehicle lanes, two tracks, a bus lane, five vehicle lanes and a pedestrian and bicycle path.
It consists of three independent bridges built over time, which have five equal openings with spans of 48.8 + 70.1 + 97.5 + 70.1 + 48.8 m (160 + 230 + 320 + 230 + 160 ft ) to have.
Narrows Bridge (1959)
The first Narrows Bridge was planned by G. Maunsell & Partners and EWH Gifford (for the track girders) and the architects William Holford & Partners and built between 1957 and 1959 by Christiani & Nielsen from Copenhagen and JO Clough & Son from Perth. It was the largest continuous from precast segments manufactured prestressed concrete bridge in the world.
This bridge was originally 27.4 m (90 ft) wide with six lanes at 21.3 m (70 ft) separated by curbs and guard rails (0.6 m / 2 ft) from the 2.4 m (8 ft) wide sidewalks were separated. There was no median so that traffic could also be handled with 2 + 4 lanes.
The superstructure consists of eight parallel, haunched prestressed concrete - solid wall girders with a wide upper chord, which forms part of the deck, a narrow web and a strong lower chord. The girders consist of around 3 m long prefabricated segments, which were assembled on a falsework to form brackets and suspension girders and then connected with tendons and braced with external tension cables to form continuous girders. Great care was taken to make the bridge look pleasant; Concrete made from white sand, crushed quartzite and white cement was used for the exterior surfaces.
The four pillars and the abutments are founded on so-called Gambia driven piles, which extend up to almost 40 m into the ground.
The bridge was officially opened on November 13, 1959.
In the 1970s, seven lanes were accommodated on the deck. Nevertheless, the increasing traffic over the years led to daily traffic jams on the bridge, which soon became Australia's freeway with the heaviest traffic.
Narrows Bridge (2001)
It was finally decided to build a second bridge to the west at a distance of 6 m so that the existing structure would not be affected by the subsidence of the new one. Otherwise, the new bridge should resemble the old one if possible. Between 1999 and 2001, Leighton Holdings built the new bridge. For this purpose, the project was divided lengthwise into two halves, both of which were carried out using the incremental launching method and then combined to form a deck.
Railway bridge (2007)
Between 2005 and 2007, the railway bridge was built by Leighton Constructions according to plans by GHD, Coffey Geosciences and Wyche Consulting. The bridge consists of a steel box girder , which was divided into long segments and transported to the bridge and lifted into place with mobile cranes. The 6 m wide space between the two road bridges was used. Also further south, until shortly before the Kiwana stop , the Perth – Mandura railway line runs between the two lanes of the freeway, while it leaves the motorway immediately north of the bridge. The railway line is built in Cape Gauge , the traditional gauge of the railroad in Western Australia . The Mandurah Line of Transperth Trains , a S-Bahn-like service of the SPNV , operates here .
Web links
- JW Baxter, EM Birkett, EWH Gifford: The Narrows Bridge over the Swan River, Perth, Western Australia.
- Perth's First Narrows Bridge. A retrospective look at its construction. Photos from the construction of the first bridge (PDF; 2.8 MB)
- Narrows Bridge. City of South Perth local heritage inventory, place record form of March 2000, updated November 2015 (PDF; 8.2 MB)
Individual evidence
- ↑ The Narrows Bridge on Australia for everyone.com
- ↑ a b c d J. W. Baxter, EM Birkett, EWH Gifford: The Narrows Bridge over the Swan River, Perth, Western Australia.
- ↑ Christiani & Nielsen had been active internationally for a long time and also had a branch in Australia
- ↑ Narrows Bridge on Clough.com
- ↑ The Gambia stakes are named after the place where they were first used.
- ↑ a b The Narrows Bridge: 60 years of history. Article dated April 26, 2017 in The West Australian
- ^ Narrows Bridge duplication underway. Leighton press release dated June 2, 1999, on archive.org
- ^ Kwinana Freeway and Bridges Works. Notice from New MetroRail dated April 26, 2007