Pendle Water FAS, Lancashire, Sheet Piling


The flood alleviation scheme was to reinstate and reinforce the flood walls along Pendle water, a tributary of the River Calder. The works involved re-profiling the riverbed, sheet piling to both sides of the main channel and brickwork cladding to complete the works.


Ale Piling were involved from the very beginning of the project due to the access constraints of the scheme. We carried out the installation of all of the sheet piles on site, for the main contract after they were advised by several other sheet

piling companies that the work could not be carried out with equipment that was available. The work involved operating from within the drained riverbed, working underneath high-voltage overhead cables which ran the whole length of the site and installing sheet piles in close proximity to the neighbouring properties.

The river was drained and diverted by the main contractor, once this had been carried out, using one of our side grip piling rigs we installed all of the sheet piles on-site. The mobility of our rigs enabled them to enter and exit the riverbed easily to contend with any flood conditions that may have arisen. Height limiters were used on the rig, whilst working underneath the overhead high-voltage cables, to comply with the requirements of the electricity company.

Finally the sheet piles were driven to depth in the hard sandstone using our excavator mounted hydraulic impact hammer. The sheet pile sections and equipment were chosen by us to ensure the correct penetration in to the ground was achieved.

Materials used were Pu16 sheet piles, 9-8 metres long

Ground conditions were riverbed silt, glacial till, clay and existing structures.


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