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Bachy Soletanche Ltd

Bachy Soletanche is a world leading geotechnical specialists with a reputation for the delivering high quality, cost effective, sustainable, and innovative designed geotechnical foundations solutions to budget, on programme, in a safe and efficient manner.

As a multi-disciplined Geotechnical contractor, we offer a range of techniques including:
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The company has a proven track record in the water industry for the delivery of foundation solutions to budget, on programme, and to the required quality standards in a safe and efficient manner. Recent projects include Lee Tunnel, Thames Tideway Tunnel, Shieldhall Tunnel, Fleetwood WwTW and Heswall WwTW.

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Thames Tideway Tunnel - East Contract - Earl Pumping Station (2022)

A complex ground improvement scheme has been designed and installed at Earl Pumping Station (EARPS), one of Tideway East’s sites, to enable the excavation and permanent works for the combined sewage overflow (CSO) chamber to be carried out. Challenges such as local contamination, site congestion, costs and time scale had to be overcome by delivering […]

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Thames Tideway Tunnel - East Contract - TBM Delivery (2021)

The Thames Tideway Tunnel is a new storage and conveyance tunnel running through the centre of London, mostly under the River Thames. The main tunnel, which is approximately 25km long with an internal diameter of 7.2m, will run from Acton in the west through to Abbey Mills in the east. The project has been split […]

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Woolston WwT Scheme (2017)

Built in 1966, Southern Water’s Woolston WwTW uses conventional activated sludge plant (ASP) to treat sewage flows from part of the Southampton conurbation, serving a population of approximately 62,000 people. The site occupies an area of 1.26 hectares. The existing sewerage system which feeds into the WwTW collects both wastewater and stormwater from the Woolston […]

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Lee Tunnel Flow Transfer System (2016)

Thames Water’s Lee Tunnel will create a cleaner, healthier River Thames by capturing combined sewer overflows at Abbey Mills Pumping Station, preventing 16 million tonnes of stormwater and sewage from being discharged into the River Lee each year. Up to 385,000m3 of stormwater and sewage will be stored in the 7km long tunnel and transferred […]

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Shieldhall Tunnel (2016)

Construction of the Shieldhall Tunnel, the biggest investment in the Glasgow wastewater network since Victorian times, is well underway. Once complete, it will improve river water quality and the natural environment of the River Clyde and its tributaries, enable the Greater Glasgow area to grow and develop, alleviate sewer flooding key locations and deal with […]

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Thames Tideway Tunnel - East Contract - Challenges (2016)

London’s sewerage system was designed by Sir Joseph Bazalgette in the 1850s, for a population of four million people. While the Victorian sewers are still in excellent working condition, they are struggling to cope with the demands of the city’s growth. Every year, tens of millions of tonnes of raw sewage pour into the River […]

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Woolston WwT Scheme (2016)

Construction works are now in their second year on Southern Water’s £63 million environmental improvement scheme to redevelop and completely modernise Woolston WwTW. (The first year of the Woolston WwT Scheme was detailed in the 2015 edition of UK Water Projects). The existing works uses a conventional activated sludge plant (ASP), built in 1966, treating […]

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Fleetwood WwTW Stormwater Storage (2015)

In order to help reduce the spill frequency of untreated stormwater on the Fylde Coast in Lancashire, a new storage tank was required to provide an additional storage capacity of 15,000m3. The new tank was to be located at the existing Fleetwood WwTW and was completed within AMP5, delivered on programme and within budget. This […]

What we do:

Civil Engineering: Piling Contractors | Shafts

Consultants: Geotechnical