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Contractors World 2012 Volume 3 Issue 1
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The requirement, to pump 37 million litres of water out of the locks and keep them dry throughout the entire process, was handled by 26 Grindex pumps. After 25 days the project was considered a success and the locks were reopened.

The requirement, to pump 37 million litres of water out of the locks and keep them dry throughout the entire process, was handled by 26 Grindex pumps. After 25 days the project was considered a success and the locks were reopened. Sweden

Holding Millions of Litres at Bay

When it was decided that new doors needed fitting on the four locks at Trollhättan on the Trollhättan Canal in central Sweden, the Swedish Maritime Administration turned to Sjuntorp Industrisupport AB for dewatering help.

The requirement, to pump 37 million litres of water out of the locks and keep them dry throughout the entire process, was handled by 26 Grindex pumps. After 25 days the project was considered a success and the locks were reopened.

When the Trollhättan Canal was opened in 1800, it made the waterways of western Sweden, between the North Sea and Lake Vänern, accessible by sailing ship. Since then the 82 kilometre long stretch of the River Göta, which rises 44 m in total, has gone through a number of major upgrades.

The six locks, for example, all have double floors and electrically and mechanically operated doors and gates. Inspections by the Swedish Maritime Administration however, revealed that the gates at the four Trollhättan locks could become a potential hazard. Therefore, in August 2011, the canal was closed at Trollhättan for essential repairs, including renovation of the locks, changing/upgrading of the lock pumps and installation of the new doors.

Each lock can house ships up to 4000 metric tonnes and is 89 m in length, 13 m wide and 5.4 m deep. They typically holds approximately 9,500 m³ of water, the equivalent of 9 seconds of water flow in the River Göta. Large dimensions

Each lock can house ships up to 4000 metric tonnes and is 89 m in length, 13 m wide and 5.4 m deep. They typically holds approximately 9,500 m³ of water, the equivalent of 9 seconds of water flow in the River Göta.

With four locks to empty, powerful and reliable pumps that could operate around the clock were required. The Swedish Maritime Administration, which is responsible for the locks, contacted Sjuntorps Industri Support, as they have successfully handled the dewatering process in the past.

With over 300 people on site and tight deadlines to meet, it was imperative that every stage of the operation went according to schedule. This of course meant ensuring the locks were kept dry at all times.

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Page updated: January 2011

 

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