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I was wondering how they hid the rack that raises Scherzer rolling lift bridges. This diagram shows that it doesn't use a rack. Instead it uses one big hydraulic ram.
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NewCivilEngineer
| The project includes roadwork and utility relocations and costs 146m pounds. The clearance is 12m (40'). |
"Farrans installed 180 continuous flight auger (CFA) piles with diameter of 1200mm have been installed to depths of up to 30m for the piers on land and abutments. Marine piling works involved the installation of 42 rotary bored piles of the same diameter as the CFA ones at depth of up to 60m. For the installation of the dolphins – steel tube piles that act as crash barriers around the piers and abutments – Farrans chose the “auger-push method” rather than hammering them to reduce vibrations, ensuring that a nearby UK Power Networks tunnel was unaffected. “We would lower the tube into the ground, auger inside, then push the tube a bit more and auger,” Rogers explains. Through the use of this method fewer piles were needed and savings of £800,000 were realised."
[See the 2:27 video below for the move described in this article.] |
Luke Martin Photography
posted 18 photos with the comment:
🚢🛟🌁 Today in Lowestoft saw the arrival of two more vital pieces in the construction of the Gull Wing bridge project in this Suffolk town….
Weighing more than 400 tonnes combined, and measuring between 40m and 50m long, the next two steel sections of the bridge arrived from the Netherlands this morning after a 8 hour journey being assisted by Dutch Pearl & SMS Shoalbuster ….
The arrival of the sections Nav 2 & Nav 3 will be lifted from the barge and into position in the coming days to move this project into the next stage ..
Rebecca Barker: My fiancé brought this through today. Very proud of him. Was a lot of pressure on. Apparently there was 10cm either side going through the bridge 😱🚢⚓️👍🏻
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Concrete pump trucks pouring a pier:
This was the steel skeleton for the north approach. The deck that was added used prestressed concrete "planks."
4 of 16 photos
posted by Luke Martin Photography with the comment:
Yesterday saw the arrival of SAV 1 & 3 Gull Wing Bridge sections here in the town of Lowestoft ..
It was planned to see the arrival take place at 11:00 yesterday morning but after strong winds here on the coast it got delayed until 18:00hrs , with the wind level dropped saw the weather here turn with rain for the rest of the day and into the evening 🌧️🌧️
At 19:00hrs the bridge sections was brought into the harbour with Lead tow taking place by Tug Elisa and assisted by Viking Energy she was then skilful brought into the harbour and through the Bascule bridge ⚡️
With myself assessing the weather and wanting to capture the arrival I patiently waited (getting slightly wet) and captured a handful of photographs to share with you 👊
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[This pushboat caught my eye in more than one of the photos. With its two pedestal cranes and work area, it can obviously due more tasks than just push barges around.] |
🌉 The final section of the Gull Wing Bridge in Lowestoft for Suffolk County Council is being installed.🌉
The bascule span is 39.5m long, 22m wide and 35m tall and will weigh approx. 1120 tonnes when positioned. This is made up of 750 tonnes of permanent structural steelwork and an additional 370 tonnes of temporary ballast to ensure the bridge stability during installation.
An additional counterweight of heavyweight concrete will be placed within the J-beams during the installation and commissioning phase of approx. 380 tonnes resulting in the total weight of the bridge during operation being approx. 1100 tonnes.
The bridge will sit clear of the highest tide by 12m, meaning that the tips of the J-beams will usually be well over 50m above the sea below. When the bridge is rolled back in the open position, the end of the bridge span that carries the road will be over 60m above the tide below.
The completed bascule bridge will be the largest rolling bascule bridge in the world lifted using hydraulic cylinders.
Video credit: CHPV
A couple of screenshots from that video:
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