Maryport storm water tank, Cumbria UK
|Description||Maryport storm water tank, Cumbria|
|Challenge||Design, supply and erect mastclimbing work platforms shaped to fit round profile of the pit|
Heavy rain and storms can overload urban waste water systems. In coastal towns, the consequences can be serious, as waste water may then discharge unhindered into the sea. The town of Maryport in the northwest of England is no exception. The local utility supplier, United Utilities, therefore decided to build an underground vessel as a storm water overflow tank.
The new, cylindrical tank is 14.5 m deep and has a diameter of 25 meters. It will help to regulate water surges in heavy rain and storms. The long-term goal of the investment is to improve the water quality of the Solway Firth, where Maryport is located.
The tank’s concrete walls would normally be constructed with the aid of scaffolding. However, this solution can prove to be costly and it is also difficult to operate in a cramped excavation pit. SGB (Formerly Harsco Infrastructure), working on behalf of J. Murphy & Sons Limited, therefore designed a bespoke solution with mastclimbing platforms, which are not usually used in deep pits.
The six mast climbing platforms were rounded to precisely match the inner curve of the constructed tank walls. This allowed shuttering work and concrete placement to be completed from inside the excavation.
"The six MASTCLIMBERS™ proved to be very flexible as we were able to raise and lower them as we needed so that each stage of the construction work could be completed independently. This allowed us to safely work at a more rapid pace than would have been possible using normal scaffolding."
Aidan Kerrigan, Site Manager, J. Murphy & Sons Limited
SGB had already successfully used this innovative access method during the construction of a storm water tank in London, for the same contractor.
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