Specialist construction contractor Geostructural Solutions and sister company GSS Piling Ltd, who specialise in restricted access mini piling, used two Klemm rigs purchased through Skelair International for piling works at the iconic Battersea Power Station development in South West London earlier this year.
The two KR709-2 machines are part of a nine-strong fleet of Klemm drill rigs owned by GSS Piling Ltd. The majority of the rigs are under three years old and all of them were purchased through Skelair, one of the UK’s leading suppliers of ground engineering and rock drilling equipment.
The high-profile restoration of the Grade II* listed Battersea Power Station will see it transformed into a mixed-use development by 2020. GSS Piling was contracted for piling works within the Turbine Hall, to install deep bearing piles and sections of contiguous walls. Working with restricted access, in between columns and with limited headroom, the GSS team were tasked with drilling up to 30-metre deep piles at a diameter of 450 millimetres, with up to 15 metres of temporary casing at 508 millimetres in diameter.
Most of GSS’ work consists of restricted access mini piling and basement operations and groundworks – MD Andy Parks estimates that around 90 per cent of their work is restricted access, and most of that is because of a lack of headroom and tight access making the Klemm restricted access rigs ideal.
GSS Piling’s Klemm fleet, which includes three Klemm 709-2s, two 708-2s, one 702-2R and three 702-2s, has been deployed on a wide range of projects ranging from high-end residential basements, such as the prestigious developments of 62-63 Pall Mall (Berry Brothers) and 39-40 Lowndes Square in London, through to possession works on rail and underground including Abbey Wood Station for Crossrail and Baker Street for London Underground.
The Klemm 709-2 is a particular favourite, so much so that the most recent addition to their fleet had to be made-to-order by the manufacturer, as it had been discontinued and replaced by the larger 709-3G.
Chris Neighbour, Sales Director at Skelair, said: “GSS Piling Ltd was lucky to get the very last 709-2 ever produced! It’s easy to see why the Klemm rigs are a great choice for GSS Piling – they are perfect for hard-to access projects that need compact rigs with plenty of power.”
The KR709-2 has now been superseded by the brand new KR709-3G, which has a Volvo diesel engine giving out 160 kW with 20 per cent more usable power than the 709-2. The 3G has a new KH48 rotary head with up to 48000 nM torque, 15 ton pull back, full radio remote control and 660 clamps if required. It is also tier 4 final and EN16228 compliant.