Sewer lining first in Wessex Water project
Wessex Water has become the first company in the UK to deliver a pressure main liner to the new international standard for cured-in-place pipes under pressure.
The liner was installed inside a defective rising main at the company's Christchurch sewage treatment works near Bournemouth.
Critical sewers engineer Nathan Hand said: "Wessex Water has been lining gravity sewers since 1984.
"What was different here was putting a liner in a pressure main, so it had to be able to handle internal pressures from the pumps.
"This meant the design and materials were very different, with a glass fibre woven into the felt to strengthen it and a special blend of resin used."
Extensive collaboration was required to overcome some tough challenges and complete the scheme last month.
Paul Musselwhite, Wessex Water's multi-functional general foreman, explained: "What made this scheme unique was that all work was undertaken in an active sewage treatment works.
"It soon became apparent that an easy fix couldn't be undertaken due to the close proximity of a storm settlement tank.
"Our R&M waste department came up with a solution to overland the defective pumping main to keep the local network in operation. This also allowed time for the in-house rehab team to design one of the first pressurised liners to be installed.
"Both excavations were completed in very challenging ground conditions, and we worked in close partnership with the main treatment guys and local scientists."
A video of the work being undertaken is available online here.
- Scottish Water invests £3M in Cambuslang project Scottish Water has announced it is investing £3M in Cambuslang as part of works to upgrade the wastewater network, and... Read More >
- UU fast-tracks tunnel project to resolve sinkhole sewer damage United Utilities (UU) is proposing a £4M tunnelling project to bypass a sewer that was damaged when a sinkhole opened up... Read More >
- Thames adopts new thinking in sewer upgrade Thames Water is radically re-engineering an Oxfordshire market town's sewer network to help developers prepare for... Read More >
- Rewarding excellence WWT content director Alec Peachey looks ahead to next year's Water Industry Awards. Read More >
- Getting to the heart of sewer repair Wessex Water's award-winning Re-Rounder, inspired by heart surgery techniques, helps get deformed sewer networks back into... Read More >
- Through the keyhole: The King's Scholars' Pond project The use of keyhole engineering on Thames Water's King's Scholars' Pond project saved money and carbon while keeping London... Read More >
- Flushed with success: FOG and Unflushables Southern Water's FOG and Unflushables programme has brought a significant improvement in the state of its sewers. Robin... Read More >
- Will SfA8 make as big a splash as hoped? Martin Lambley, product manager for stormwater management at Wavin, looks at whether Sewers for Adoption 8 will meet... Read More >