Doosan in action


New Doosan Excavator for Suttles Sheet Piling on London Tube

Doosan Crawler Excavator DX255LC-3 doing some sheet piling work

On its first project, a new Doosan DX255LC-3 25 tonne crawler excavator purchased by Suttle Projects Ltd, based at Swanage in Dorset, has been used to complete challenging sheet piling work as part of a bridge scour protection contract carried out by Southampton-based Dyer & Butler on behalf of the client, London Underground Limited, a subsidiary of Transport for London.

Working below a rail bridge over the River Gade in Rickmansworth in Hertfordshire, Suttle Projects installed sheet piles on the bank and in the river using an excavator-mounted side grip vibratory hammer, to allow Dyer & Butler to divert the course of the river through specially constructed underground pipes.  Dyer & Butler then added reinforced concrete to provide protection for the bridge foundations against river erosion, before the sheet piles were removed by the new Doosan DX255LC-3 excavator and the river was allowed to flow normally again.  The bridge over the River Gade carries trains connecting Rickmansworth and other stations on London Underground’s Metropolitan Line with the centre of London.

The new Stage IIIB compliant Doosan DX255LC-3 excavator was supplied by Kellands (Plant Sales) Ltd, the Authorised Dealer for the Doosan range for the whole of South West England, based at Bridgwater in Somerset.  The DX255LC-3 excavator is powered by the 6-cylinder, turbocharged Doosan DL06K water-cooled diesel engine meeting emission regulations through the use of cooled exhaust gas recirculation (EGR), diesel oxidation catalyst (DOC) and diesel particulate filter (DPF) after-treatment technologies.  Featuring a high-pressure common-rail design with direct fuel injection and electronic control, the DL06K engine provides 138 kW (185 HP) at 1900 rpm.

Joe Paine, Managing Director of Suttle Projects Ltd, said: “I am very impressed by the new Stage IIIB compliant range of excavators from Doosan as exemplified by the DX255LC-3 model - they are all very well designed and offer excellent operator comfort and low noise levels.  The high hydraulic flow on Doosan excavators is perfect for this type of piling work and our purchase of the new DX255LC-3 excavator demonstrates our belief that only the most modern and up-to-date technology should be used for our sheet piling work, a view that is not shared in every part of our industry.  The fact that we carried out this work in an especially sensitive area such as the River Gade only reinforces the point about using only state-of-the-art, environmentally acceptable equipment.”

Running almost entirely though Hertfordshire, the River Gade flows through Hemel Hempstead, Kings Langley and Croxley Green to Rickmansworth where it joins the River Colne.  The scour protection project carried out by Dyer & Butler took place on a part of the river defined as a site of special scientific interest (SSSI) and the company has had to ensure its work meets the strict environmental guidelines required for work on an SSSI.

Joe Paine added: “Suttle Projects has wide experience of civil engineering and piling projects in sensitive environments such as this, particularly where rivers and railways are concerned.  As environmental concerns increase, the greatly reduced emissions and clean technology of the new generation of equipment such as the Doosan DX255LC-3 excavator will be a prerequisite for work on projects of this type.

Founded in 2008, Suttle Projects is part of the long-established Suttles Group, formally incorporated as J. Suttle Transport Ltd.  It was set up to deliver very technical site-based projects for the Group, where the use of particular plant and technical expertise could be of use to the company’s civil engineering and groundwork customers, both locally in Dorset and throughout the UK. 

The Suttle family name has been part of the local stone industry in Dorset as stone merchants and quarry owners for over 70 years.  Today the company runs a large fleet of modern tipper and crane offload vehicles and is the premier provider of crushed stone, aggregates, recycled crushed concrete and natural stone products in the Poole, Bournemouth and neighbouring areas of Dorset.  In addition, Suttles works together with civil engineering and construction companies to provide major site clearance facilities.

Dyer & Butler has a specialist rail division which has been delivering a wide range of works in the rail industry for well over 20 years.  Works are undertaken for Network Rail, London Underground and a variety of train operating companies.  Works delivered include overbridge and underbridge construction, reconstruction and refurbishment, works to platforms, canopies and station buildings, embankment repairs and strengthening, drainage improvements, masonry repairs, collision protection beams, site investigations and hidden critical examinations.  In addition, Dyer & Butler hold a number of framework agreements with Network Rail to deliver minor works in the Southern and Western regions.

With depots in Bridgwater and Camelford in Cornwall, Kellands (Plant Sales) Ltd is the Authorised Doosan Dealer for Somerset, Dorset, Wiltshire, Devon, Cornwall, North Somerset, Bath and North East Somerset, Bristol and Gloucestershire.  The company is also the Authorised Dealer for same areas for the complete range of Bobcat compact equipment, including skid-steer, compact tracked and all wheel steer loaders, mini-excavators, telehandlers and attachments. 

With the new DX255LC-3 excavator, Doosan has gone much further than just meeting the Stage IIIB regulations with a new design that fully utilises the increased power available from the engine, providing a huge boost in every area including productivity, fuel efficiency, controllability, operator comfort, reliability, durability and serviceability.

As in all Doosan new generation excavators, there has been a particular focus on improving operator comfort with further enhancements to the ROPS and OPG certified cab including expanding the space available for the operator by over 6%.  In addition, a seat-height lever and a tilting function are both incorporated in the seat to allow the operator to find an optimum seating position.

The cab is pressurised to prevent the ingress of dust and dirt.  Lighting capability has been greatly increased to facilitate working at night.  A rearside camera is standard and a side camera is available as a safety option.  An increased area of glass in the windows of the cab ensures the operator always has excellent all round visibility.  Other features include a fully automatic climate control system, a USB port to play music and videos and more storage compartments for paperwork and other items. 

The DX255LC-3 excavator has an operating weight of 25.08 tonne with standard boom, arm and a 1.1 m3 bucket.  The bucket breakout force is 17.9 tonne (ISO), while the arm breakout force is 12.8 tonne (ISO).  Maximum digging reach is 9.9 m at ground level in the standard monobloc configuration and 10.3 m in the articulated configuration.  The maximum digging depth is 6.8 m in the monobloc configuration.

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