Contract: Dee 72" Cleaning - 1500 dia Pipejack x 200m long
" Enabling work included 1200mm cross connection between West / East Link Main and Liverpool North Trunk Mains. Active Tunnelling successfully completed a 200m long x 1500mm Pipejack. Then welded and slip lined this section with 1200mm steel pipe work. ATL delivered the full package throughout the project from proactive Management to the highly skilled work teams. ATL brought solutions to challenging site conditions, and have contributed in moving our business forward; we would highly recommend ATL to our clients and look forward to working with ATL in the future.
BBUSL (Network Construction Alliance)
Contract: M25 Widening - Junctions 27-30 - Auger Bored Cross Drains
"Active Tunnelling Ltd (ATL) has worked in partnership with Skanska Balfour Beatty Joint Venture (SBBJV) on section 1 of the M25 between junctions 16 & 23 on all 3 phases of the Cross Drain contract. The works were carried out by Auger bore method with ATL sinking their own 'Drive' and 'Reception' pits and in total laid approximately 2,100m of clay and concrete pipelineunder the main cariageway. These works are are valued at approximately £3.3m
The Pipelines have varied in diameter between 300mm to 600mm and between 10m to 50m in length per crossing. ATL has developed a process of "Blind" Auger boring (access only required from one sideto assist SBBJV during phase 3 that has aided early completion and allowed other contractors improved access to working areas. 500m have been successfully completed in this way while maintaining accuracy and programme.
ATL have performed well on this scheme dealing with some very challenging types of ground, weatherand time constraints working with traffic management. SBBJV and ATL have forged good relationships that enabled the programme to become fluent so that the changes can be dealt with smoothly and effectively to complete within the overall programme period.
In Summary ATL completed 80 crossings, delivering a quality product with an innovative fresh approach. The work was carried out in a safe and competent manner, on budget and within programme to make this a very successful contract for both parties. Good relationships allowed for change to take place at minimal cost and time. ATL were very proactive in the planning of resources to meet the needs of SBBJV and I would have no issues working with ATL again in the near future or recommending them for future works.
ATL have shown a sensible approach to commercial matters that enabled accounts to be settled quickly and efficiently. During phase 1z works, this sensible commercial approach enabled the difficult ground conditions encountered to be dealt with in a satisfactory manner both to ATL and SBBJV. Given the very demanding programme of the M25 widening, this was a crucial outcome for the project.
SBB M25 Joint Venture
Contract: M25 Widening - Junctions 27-30 - Auger Bored Cross Drains
We employed Active Tunnelling Ltd to undertake the above works on this contract. The work undertaken involved the provision of eight full crossings and four half crossings between Junction 29 and 30.
We found this Contractor to be Professional being both Proactive in responding to changes in the scope of the works and swift in agreeing commercial matters.
SBB M25 Joint Venture
Contract: Stoke Lyme Valley - Flood Alleviation Scheme AMP 5 Year 1
"Lyme Valley flood alleviation was a flagship scheme for NMCNomenca being one of the year 1 “big 6” schemes.
The scheme comprised of, primarily, a 25m dia, 15m deep shaft tank, CSO, 2 new outfall structures and ancillary chambers and pipework.
The site was, geologically, of archaeological interest and was pump tests identified Artesian Waters in the area.
NMCNomenca employed Active Tunnelling (ATL) in their professional capacity to excavate for, and construct the shaft tank, the bottom 6m being underpinned and the top 10m built from bottom-up. ATL also carried out the complex benching and constructed a central column to carry the radial beams forming the basis to receive PCC planks to form the cover slab.
ATL demonstrated a collaborative approach to the scheme and engaged with upfront and follow on contractors at an early stage and proved to be one of the success factors to the scheme
ATL provided a quality product, on programme, with a professional, highly experienced workforce, the approach to health and safety is exemplary and NMCNomenca will continue to use ATL on a number of disciplines."
Contract: Basingstoke Sewer Improvements
"I confirm the successful completion of approximately 1300m 0f 1.2m int. diameter PipeJacking completed in 10 individual drives varying in length between 56m& 186m, as part of the Basingstoke sewerage Improvement Scheme for J Murphy & Sons Ltd on Behalf of Thames Water Utilities Ltd. The scheme was carried out using a 1200 Backactor for 4no drives and a Full faced TBM for 6 drives in a wet structurless chalk,, one of the drives was 85m in length under the Main Reading to Basingstoke Railway. Active Tunnelling completed the scheme to specification and in a competent manner. We look forward to working with Active Tunnelling in the future."
J Murphy & Sons
"We are pleases to provide a reference for the successful completion of our scheme at Alderley Edge. The scheme consists of 4nr 4m ID segmental Shafts sunk between 16 to 18 m approximately 3.5m away from the West Coast Main Line. All of our shafts encountered bands of running sand during the construction, with the shafts eventually founded in stiff clay or mudstone. Shaft 2 was constructed underwater for the final 5m and founded in Mudstone/Siltstone. Upon completion of the shafts, ATL fixed(approx 22t/shaft) within the shafts, filled them with concrete and installed Macalloy anchorages into the caissons to act as piled foundations for a new bridge construction. All of the shafts were constructed on time, within strict settlement criteria of Network Rail and to the satisfaction of Birse Rail in a professional and competent manner. We look forward to working with Active Tunnelling in the future
Contract: Seedy Mill Trunk Main
"I confirm the succesful completion of 50m drive of 1.2m dia PipeJacking with a ATL's 1200 full faced TBM completed in running sand and gravel with a high water tables part of the Seedy Mill Trunk Main on behalf of South Staffordhire Water. The drive was carried out under a live railway under normal working hours and was approved and complied with Network Rail rRegulations. Active Tunnelling carried out the scheme in a safe & competent manner, with a professional approach to the workplace. They worked in accordance with the method statementwithout any record of incident. I would have no hesitation in working with Active Tunnelling again in the future or recommending them to other clients.
"Active Tunnelling have recently completed four tunnels at RAF Lakenheath for Fitzpatrick. The work involved constructing a 110m long 1200 dia tunnel under the main runway in 4 days and three other tunnels between 60m and 80m long under five taxiways with minimal cover, whilst working in very sensitive environment on an operational fighter base. Active Tunnelling performed there works safely, to programme and provided a quality finished product. I found working with Active Tunnelling a pleasure and would have no hesitation in employing their company again.
Contract: New Leisure Centre Stafford
"We refer to your recent works in installing a new sewer connection by Timber Heading and write to compliment your company and your operatives who carried out the works. During the course of the work, a number of significant problems arose and these were dealt with in a most positive and constructive manner resulting in the minimum delay."
If we could be of assistance in the future, we would be pleased to provide a reference as to your companies abilities
Contract: Seven Trent Water, Gloucester
"Active Tunnelling has had a professional association with ourselves over a number of years and has been employed by us to undertake both pipejacking and segmental shaft construction on several occasions. In particular, in 1997, we employed Active Tunnelling on a contract for Severn Trent Water Ltd in Gloucester to construct 2 no. 6m. dia. segmental shafts 16 metres deep prior to undertaking a 1200mm dia. pipejack 60 metres long between the shafts passing under the Gloucester to Sharpness canal. The work was carried out expeditously, to programme, and within budget and exemplified Active's willingness to work in difficult conditions and successfully complete their contractual obligations to the satisfaction of all concerned"
Contract: Sheffield, Yorkshire
Active Tunnelling Carried out a large Tunnelling Sub-contract on our behalf. The work consisted of 5no. Shafts approx 15m dee, together with some 800 lm of 1500 dia tunnel using one pass concrete tunnel linings and concrete pipes by jacking methods.
The ground was variable from Hard Rock to Soft ground and involved curved drives on the one-pass section.
"Active Carried out this difficult contract in a workmanlike manner and achieved a successful completion to the work. We have no hesitation in employing them on future works of this nature"
J. Murphy & Sons
Contract: Priddys Hard Pumping Station & Crossways Pumping Station
"We are pleased to be able to recommend Active Tunnelling to carry out the construction of segmental shafts. They have completed two contracts for us, both of which have gone extremely well. The most recent contract required the design, supply and installation of a Ø3.66m smoothbore segmental shaft, 6m deep, to form a new pumping station wetwell for Southern Water. The shaft was located adjacent to a sea wall and in a very tight and confined site with limited access and working room. Due to the proximity of the sea, the works were subject to tidal influences and this necessitated forming the 3m deep concrete plug at the base of the shaft underwater. Following the completion of the concrete plug a reinforced concrete base was dowelled into the shaft and concreted, all joints were sealed, benching was installed to the pump manufacturer's requirements and holes core drilled for incoming and outgoing pipes, ducts and vents. Active Tunnelling even supplied and installed a precast concrete cover slab. Active Tunnelling completed the works in a safe and professional manner, finishing ahead of programme and to budget. We would be pleased to recommend them and will not hesitate to work with them again in the future"
Contract: Lower Precinct, Coventry - Drainage Works
"The works carried out were to a high standard and were only achieved by the fact they employed direct good quality tradesmen. They were pro-active when given directions via the site management, and we trust we can continue a good working relationship with Active Tunnelling Ltd for many years to come."
Costain Skanska UK Joint Venture
Contract: Airbus UK, Broughton - Surface Water Pipeline and Outfall
"In order to assist the programme Active Tunnelling undertook 24hr shift working, which complimented the overall scheme being completed on time and within the original budget. Having experienced the team moral and customer focused attitude, and their supply chain, we would not hesitate in employing them on any future projects."
Bae Systems Infrastructure Solutions
Contract: Various Pipejacking and Tunnelling Schemes
"Active Tunnelling have successfully carried out a number of Tunnelling and Pipejacking schemes for us over the last 3 years on a labour and plant basis. Prior to 1994 John Doherty and his team have carried out many other schemes for us on a labour only basis in a wide range of different ground conditions. I have always found them to a competent Subcontractor with good expertise and a sound practical approach to tunnelling in the most difficult of ground conditions."
James A Quinn, Managing Director, Queghan Civil Engineering