Success in Northern Ireland

In recent years pressure on urban space, restrictions on the use of rural & green-belt land and similar factors have necessitated more and more new projects to be constructed below ground level in, or through, water-bearing strata. To facilitate this, each area has to be de-watered before excavations begin in order to create a dry and safe working environment. Among such projects is Victoria Square – the largest retail centre ever built in Belfast – which involved the construction of a two-storey underground car-park. Extensive dewatering was required to reduce the piezometer head within the Sherwood Sandstone and intercept any saturated silt/sand layers within overlying Glacial Till. Project Dewatering Limited drilled 24 deep wells to 40m below ground level within the cofferdam and installed an E-Tech Nauti submersible pump in each - coupled to a common collection main around the perimeter. This dewatering operation ran successfully between December 2003 and April 2007. E-Tech Nauti pumps have also been utilised in successful dewatering on the Belfast Sewer Project which involved extensive tunnelling from 28 shafts. Project Dewatering Limited undertook dewatering design and installation at various locations with wells up to 60m depth – again using Nauti pumps which have proved to be robust and reliable in variable conditions. E-Tech VS 60/3 submersible borehole pumps have also been used successfully for dewatering two F.S.T. tanks at Cog Moor Treatment Works in Barry where high fissure flow in the Coal Measures has been dewatered using thirteen deep wells around the cofferdam perimeter. Here, Project Dewatering Limited’s E-Tech pumping system yields up to 600m3/h enabling groundwork as much as 8m deep to be undertaken in dry and stable conditions. Whether the Nauti submersibles or VS series borehole units, E-Tech pumps have proved eminently suitable for dewatering in a range of arduous U.K. and overseas situations.

For more information on Success in Northern Ireland talk to Proquip Direct Ltd