Project Description

Context of the project

To meet this exponential traffic growth, the airport platform will be equipped with a third runway by reclaiming 650 ha on the sea.

Description of the project

Stabilisation of soil using the Cutter Soil Mixing (CSM) method under limited height near the airport’s North runway.

The immediate vicinity to the airport and the safety requirements prohibiting the use of equipment over 5 m high make all the more complex works that must be carried out without ever interrupting the airport activity. Only the installation of the panels closest to the runway will require special night operations once the runways are closed.

Our solution

Most of these works will have been carried out from barges, by sea, with CSM rigs especially designed by all the project stakeholders and thanks to the decisive know-how of Soletanche Bachy’s Equipment Division and EuroFrance’s Equipment Division (SME), TEC System and the Korean experts from Sambo E&C. 16 rigs have been mobilised every day, during every phase of the site and 24/24.

This CSM operation is the most important ever carried out not only by BSGL, but also by the Soletanche Bachy group. It consists in the implementation of 80,000 2.8 x 1.2 m panels, between 15 and 20 m deep, through marine deposits and loose alluvium. These operations have required numerous trials, borings and samplings.

Type of project:



Subsidiary of Soletanche Bachy:

Project owner:

Prime contractor:

Hong Kong International Airport

Joint venture:

Works period:

04/2017 – 12/2019

Types of techniques:


Your country is: United States?

Key figures of the project

CSM rigs mobilized 24/24 on site
panels implemented

Relative techniques

  • Cost-effective and more eco-friendly structures The Geomix® process uses the soil mixing technique across a [...]

  • We ensure the durability of your structures. Soletanche Bachy’s ground improvement techniques enable us [...]

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