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Contractors World  - UK & Ireland
2014 Vol 4 No 2

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Minimising The Cost Of Flood Defences - continued

The completed works“Our Enviromesh system has a steel mesh base unit to create and stabilise the slope for the flood bank, along with horizontal tails that provide the soil reinforcement.

The completed works

“The fact that it is an all-in-one unit saves the time and cost that would have been taken in onsite assembly. We carried out full trials in our factory before training the site team to install the product.”

The system was approved for use by both the Environment Agency and Network Rail and is now being sold by the manufacturers as a solution for other geotechnical solutions requiring soil reinforced structures.

Keith Dorling, managing director at Burdens, said: “BAM Nuttall asked us if we could provide any alternative products to the one specified and as specialists in this area, we were able to work with one of our suppliers to design a bespoke pre-assembled system that saved time and cost on the project.

“Not only has the system helped to enhance flood defences for the area and the Great Yarmouth to Norwich rail line but it provides a wider and more secure crest for walkers, along a popular public right of way.”

Missed Opportunity?

A longer term solution proposed but not proceeded was for a technologically advanced tidal energy harvester and flood barrier.

Lowestoft research and development firm, 4NRG, built a 7 m long harvester prototype with the help of a £92,000 grant from the East of England Development Agency.

Their first objective had been to build tidal energy generators for use at the site of windfarms to help bring down the cost of producing wind energy.

He said: “The whole of the North Sea is very promising, because of the strong tidal flow. Tidal energy is more regular than wind and can be harnessed four times a day as the tide goes in and out.”

The barriers would help pay for themselves with revenues gained from generating electricity. They would generate a reliable supply of renewable energy in almost any weather and at times of a very high or surge tide, the shutters would close to serve as a flood defence.

For more information >>> Burdens

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