Whilst WJ are well known and respected as one of the leading dewatering contractors in the UK, we have many other services within our oeuvre. We recently demonstrated one of these whilst undertaking in-tunnel probe drilling as part of the Thames Tideway works at the Dormay Street Shaft in Wandsworth.read more
2018 was a momentous year in the long history of WJ, with the launch of WJ Group, and major global projects such as Thames Tideway in London and Eglinton Crosstown LRT in Toronto hitting full throttle, therefore as the year drew to a close it was the perfect opportunity for all of our staff to let their hair down and relax.read more
2018 marks a milestone for WJ, as not only is it 37 years since our companies’ formation, but it also marked a rare gathering of our Board of Directors and Senior Managers from across our global operations, representing 23 nationalities from 8 international business regions, for our first International Week in leafy Hertfordshire during early September to mark the formation of WJ Group and the birth of WJ as a truly global brand for all your Water Management requirements!read more
On the 17th and 18th of September 2018, the British Geotechnical Association and Engineering Group of the Geological Society hosted the first major conference on Chalk in almost 30 years, right on WJ’s doorstep, at Imperial College in Central London.read more
Back in May WJ UK had the honour of being included in articles in the British National Press because of our work on the Thames Tideway project. This time we’ve gone one step better and can now claim to be ‘as featured on TV’!read more
It’s not often WJ are featured in the national press, however we very recently had the honour of appearing in articles on both the Daily Mail and London Evening Standard websites about the Thames Tideway project currently underway through central London.
Much of the current sewer network underneath London date back to the mid-19th century when they were constructed under the guidance of the visionary engineer Sir Joseph Bazalgette. Over this time the population of London has more than doubled, and therefore these Victorian Sewers lack the required capacity. To tackle this problem a new 25km ‘super sewer’ running along the tidal section of the River Thames, through Central London, is being constructed, with new Combined Sewer Overflows (CSOs) and shafts being constructed at a number of iconic sites including Blackfriars, along Chelsea Embankment, along Albert Embankment, along Victoria Embankment and adjacent to Battersea Power Station at Kirtling Street.
The Kirtling Street site, is one of a number where dewatering is required, and there are few companies more accustomed to the dewatering requirements in Central London than WJ! The challenges of dewatering in the Battersea area are particularly well known to WJ having undertaken works for the nearby Battersea Power Station redevelopment, the New American Embassy in Nine Elms, and the Northern Line extension, as well as numerous smaller projects.
At the Kirtling Street site a 32m diameter shaft, over 60m deep, is being constructed as part of the Tideway works. As the shaft is being constructed with a diaphragm wall the groundwater in the upper aquifers of the River Terrace Deposits will be cut-off, however it was necessary for WJ to install passive relief wells in to the Lower Aquifers of the Chalk to relieve groundwater pressures and to ensure that as the shaft was sunk, the stability of its base was maintained.
The purpose of the shaft was to allow the construction of Tunnel Boring Machine (TBM) launch adits. To allow these adits to be constructed dewatering was required, predominantly installed from ground level, where 16 new wells were installed to dewatering the Chalk and Lambeth Group (in addition to existing wells). However access wasn’t always available from ground level, so WJ were required to use their experience of in-tunnel drilling from Crossrail to install over 60 inclined tunnel and shaft wells to again dewater the Lambeth Group.
The Thames Tideway project is expected to play a major part of WJs near future with dewatering required at a number of sites throughout London prior to the expected completion date of 2023.
You can read more about the projects at:read more
WJ are once again showing our technical prowess with another challenging project in Anchorsholme; dewatering a cofferdam in the Irish Sea!
WJ have been working in and around Blackpool for several years now, having completed the Anchorsholme Park Storage Phase 1 and Phase 2 works for Ward and Burke and the Lennox Gate project for Ward and Burke and JN Bentley, both during 2016 and 2017.
Our latest project, working with the CH2M HILL – VolkerStevin joint venture, C2V+, was to aid the construction of a new 6m by 20m cofferdam in the Irish Sea, directly off the coast from the Anchorsholme Park Storage site. The particularly challenging aspect of this project was the offshore location of the cofferdam, fortunately WJ have undertaken several similar projects to this in recent years in Ipswich and Dover.
The dewatering system comprised eight 9.5m deep deepwells installed around the internal perimeter of the cofferdam, installed using a rotary drilling rig, in to interbedded sand and clay deposits during February 2018.
The first technical challenge on this project was the installation of the wells themselves. It was only possible to install during the two 6-hr low tide windows each day, as during high tides the cofferdam would be flooded. During each of these windows it was necessary to pump out the cofferdam, crane the drilling rig in to position, drill, seal off the works so they wouldn’t flood when the tide came back in, and remove the rig from the cofferdam. Fortunately due to the meticulous planning of the works by the WJ Project Engineer, Michael Cummiskey, the wells were all successfully installed during the planned installation period.
The second technical challenge was also a result of the offshore location. As the cofferdam would be flooded during high tides it was necessary for the WJ control cabin and generators to be located onshore on an existing revetment, above the maximum tide level, with cables running between the cofferdam and the cabins along the beach and existing sea defences.
Despite the best efforts of the Irish Sea the target drawdown was successfully achieved and the pumping is due to continue until the end of April.read more
This week WJ are proudly celebrating the success of one of our colleagues away from the field of groundwater management!
Chris Robson, one of our monitoring engineers based in our UK office, has a long history in football having had a successful playing career before gaining his UEFA B coaching license. Chris is now manager of Totternhoe F.C, who play in the Spartan South Midlands League Division Two and has enjoyed great success since taking over as manager of the club, culminating in their latest triumph, a 2-0 win over Cranfield United in the Bedfordshire FA Senior Trophy!
The match was held at Bedford Town’s 3,000 seater Eyrie Stadium, and was a closely contested affair with Jack Lauder scoring to give Totternhoe the lead in the 24th minute. Joe Smith scored a second for Totternhoe to give them a 2-0 lead going in to half-time. The second half was just as tight, with Totternhoe managing to see out the game despite a big final push from Cranfield in the last ten minutes.
Chris told the local Luton News:
‘I am over the moon for everyone involved at the club, the committee, the players, the staff, and the number of supporters who travelled to cheer us on. To deliver a trophy for them means the world to me.’
Totternhoe currently lie fourth in the league, 12 points behind the leaders Park View, but have several games in hand due to the successful cup run, and could still challenge for the title. Everyone at WJ wish Chris and Totternhoe the best of luck for the rest of the season and hope they can add another trophy to their proud 112 year history!
You can read more about the game on the Luton Today website.read more
WJ Groundwater have been celebrating once again following receipt of our ISO 9001:2015 Quality Management Systems certification, to add to our existing ISO 14001 and 18001 certificates.
The ISO 9001:2015 certification, awarded to WJ by Bureau Veritas, demonstrates the quality management systems and processes that have been put in place in our Dubai, Abu Dhabi and Qatar offices, and is a welcome reward for the hard work of all of our employees.
To celebrate this achievement, a BBQ was held in Dubai and attended by many of the WJ workforce and their families, including Managing Director Richard Fielden, who had flown over from WJ’s UK head office to join in the celebration. It was a highly enjoyable event, with music, drinks, and food, the highlight of which was definitely the Filipino-Style BBQ Chicken Abodo!
This certification keeps WJ’s Middle Eastern branches in line with the consistently high standards set by the Head Office in the UK.
Hopefully this is the first in many achievements for WJ in 2018!read more
Last week WJ took receipt of a new Soilmec SM14 drilling rig. A welcome addition to WJ’s already extensive fleet of drilling rigs both in the UK and across the world!
Soilmec are internationally renowned and respected suppliers of drilling rigs, who WJ have had a long partnership, and the SM14 is the latest addition to our fleet, a fleet which already contains several trusted and reliable Soilmec drilling rigs!
The SM14 is a compact and versatile tracked rotary drilling rig that allows WJ to continue to provide excellent efficiency and high quality service to all of our customers, allowing us to work in a wide variety of environments from tunnels, shafts and basements to wide open spaces. The rig is fitted with a variety of safety features, including a rig guard cage and radio remote control, to ensure the high levels of health and safety that WJ strive for on all projects can be maintained.
The rig is perfectly designed to work on a wide range of WJ projects, including wellpoint, deepwell and ejector well dewatering system installations, and will be out on site soon where it will be put through the paces by our team of experienced drillers.
For more details on the services WJ offer please visit our Services Page, or contact our head office on 020 8950 7256.read more