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Lee Tunnel, United Kingdom2023-09-07T09:30:28+02:00

Project Description

Context of the project

To the east of London, on the banks of the Thames, the Morgan Sindall, VINCI Construction Grands Projets and Bachy Soletanche Joint Venture has built the Lee Tunnel, a major project in terms of both its size and its environmental purpose.

Description of the project

The project, initiated by Thames Water Utilities Limited, enable the sewer system to better handle excess runoff during periods of heavy precipitation and ensure more efficient wastewater treatment.

Completed in 2013, the 5 shafts – the largest ever built in the United Kingdom – were built using diaphragm walls.

Our solution

The largest of the shafts has a 1.80 metre thick wall and is 41 metres in diameter and 98 metres deep. A fibre-reinforced concrete is applied to form a lining over the diaphragm wall. A slurry pressure tunnel boring machine was connected the shafts to each other. The Joint Venture was in charge of designing and installing the MEICA equipment and pumps required to manage the sewage.

Type of project:

Projets d'eau et d'assainissement

Water and sewage


Subsidiary of Soletanche Bachy:

Project owner:

Prime contractor:

CH2M Hill (Jacobs)

Joint venture:

Works period:

05/2010 – 12/2015

Types of techniques:

Paroi moulée

Diaphragm wall


Key figures of the project

large diameter shafts
of combined capacity
long tunnel

Relative techniques

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