An overview of several commercial and residential projects we have completed using either shaft & timber heading (tunnelling) and/or open cut trench excavation. See also Testimonials from our clients.

Erith Contractors                Paddington Square Development,
Pread Street, London 

New, large, commercial regeneration project, August 2021

Construction of an 1800ID manhole upon an existing Victorian egg-shaped brick sewer:

  • A 5m metre deep shaft was excavated onto the existing sewer, before a small section was then cut out.
  • We formed a drum shutter inside the sewer involving intricate timber installation works and extended a section of the sewer formed with concrete (to strengthen the existing culvert).
  • A new manhole was then constructed to suit at site level.

Ballymore                                        The Brentford Project,            Brentford Waterside, London  
New, large, commercial and residential regeneration project, 
October 2020

Sewer Diversion via deep trench open cut and timber headings:

  • Approximately 100m of timber heading was driven underneath Brentford High Street, and 150m deep drainage open cut/trench works carried out on site.
  • Diversion work caried out with minimal overpumping of existing live combined Thames Water main sewer.
  • Major traffic management arranged and installed, which also included suspensions of parking bays and bus stops.
  • We liaised with both the local authority and Thames Water to obtain all necessary licenses from start to finish for this brand new riverside town in Brentford.

Ardmore Construction                      Old War Office,                            Whitehall, Westminster, London
Regeneration of historic and prestigious site for commercial and residential use, April 2020

Two new sewer connections for ductile/ensign pipe installations, from within old London basement:

  • The existing basement wall was carefully core-drilled for each of the two timber headings, 10m in distance each.
  • A 150mm connection was made into the existing manhole in the road (involving night works due to the busy London location) and the 400mm pipe directly into the existing Victorian culvert sewer.
  • Works were carried out from a raised working platform, and the headings were backfilled to the openings.

Barratt Homes 
West Hendon Regeneration Scheme, London

Major new residential development, November 2018

Diversion of foul sewer via deep drainage open cut trench excavation:

  • Sewer diverted at a depth of 3.5m.
  • Installation of over 200m of 1200ID concrete pipes and constructing ten 2100ID manholes.

Hodford Road, Golders Green, London

New build residential development of ten flats, October 2018

New storm and foul sewer connections via shaft & timber heading (tunnelling) excavation:

  • A shaft 3m in depth was excavated in the road, from which a 8m long timber heading was driven to the nearest main sewer.
  • The heading and shaft were backfilled with dry lean concrete, and two new demarcation chambers were built on site.

The Buckingham Group
Redevelopment of West Hampstead Overground Station, London

Upgrade of drainage infrastructure, September 2018

New foul sewer connection via open cut trench, shaft & timber heading (tunnelling) excavation:

  • A 33m long open cut through the busy TFL highway outside of West Hampstead Rail Station.
  • A 5m deep shaft was then excavated and a timber heading of 17m in distance was driven to the existing manhole in the road.
  • The heading was grouted to provide extra support to the structure.

McLaren Group
Wembley Park Project, London

New build development of residential and retail units, May 2018

Installation of Envac Pipes via timber headings (tunnelling) excavation:

  • Timber heading 40m in distance beneath the Spanish Steps at Wembley Stadium.
  • Two headings of approx. 20m length were driven from opposite ends to meet in the centre.

Domestic client
Cambridge Road, Mitcham, Surrey

Rear extension works to property,
March 2018

Diversion of existing sewer via open cut hand dig excavation:

  • Relocation of 600mm x 450mm demarcation chamber (manhole) at a depth of 1m.
  • Installation of two stub pipes.

Balfour Beatty
Arora Hotel at The O2, Greenwich Peninsula, London

New commercial development,
August 2015

Three new surface outfalls to the River Thames via timber headings (tunnelling excavation):

  • Three 15m long timber headings.
  • Forced ventilation was utilised on this project due to contaminated ground conditions.
  • Regular communication with our client meant the difficult site circumstances were worked around and the project was successfully completed within the required timeframe.

‘I would like to take this opportunity to thank you and your team for all your efforts on the project.’

Joe Kemp, Quantity Surveyor at Balfour Beatty
Project - Arora Hotel at The O2, Greenwich Peninsula, London

Company Reg No: 9111340 All rights reserved.
© 2019 - 2022. NG Tunnelling Limited.
Unit 7 Willow Lane Business Park, 1-11 Willow Lane Mitcham London CR4 4NA. 020 8648 6644

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