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Prevention against coastal flooding…

February 23, 2021

An environmentally-responsible project for the Dunkirk Urban Authority.

In recent years, since the enactment of the GEMAPI law (for the management of marine areas and flood prevention), the Dunkirk Urban Authority (CUD) has given priority to a global survey of its facilities located alongside coastlines and aquatic environments. It has established a long-term action plan for all the necessary upgrading and modernisation works to these facilities.

In the municipalities of Grand-Fort-Philippe and Gravelines, the rip-raps and embankments of the Aa channel form part of this maintenance and renovation plan due to their advanced state of deterioration.

The most frequently observed forms of deterioration to the rip-raps include:

  • Localised subsidence,
  • Longitudinal cracks and fissures,
  • Deterioration of steps,
  • Separation of coping stones,
  • Weakening due to underground cavities formed by sand and fine particles transported by channel tides,
  • Periodical collapse.

In this specific case, regular use of dredgers to clean the channel has contributed to destabilising the foot of the rip-raps, causing them to slide towards the centre of the channel.

The Dunkirk Conurbation entrusted the Hauts-de-France Regional Division and Spie Batignolles (50/50) with reinforcement and rehabilitation works to solidify 2km of rip-raps and gabions.

As the rip-raps differ according to the form of cladding, five types of repair works are to be carried out:

  • In masonry rubble,
  • In reinforced concrete,
  • In concrete asphalt,
  • Installation of gabions,
  • In reinforced concrete for the creation of a wall to protect against tidal overflows.

The teams will also be carrying out rehabilitation works to the existing drainage outlets.

Works are due to begin in April 2021 and must be scheduled according to tidal movements.

It must also be noted that this project, aimed at adapting to climate change and the strengthening of protective means against rising sea levels, forms an integral part of the regional Rev3 scheme.

Rev3

Rev3, or the third industrial revolution, is a collective scheme led jointly by the Hauts-de-France Chamber of Commerce & Industry and the Hauts-de-France Regional Authority. It is aimed at transforming Hauts-de-France into one of the most advanced regions in terms of energy, ecological and social transition.

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23-25 av. du Docteur Lannelongue
75014 Paris

  • IN BRIEF
    • Profile
    • Anchoring
    • Path
  • PROFESSIONS
    • Systems
    • Infrastructure
  • SERVICES & SOLUTIONS
    • Regional authorities
    • Industries
    • Major infrastructures
  • REFERENCES
  • CSR
  • APPLICATIONS
  • NEWS
  • CONTACT

Legal notice Ι Anticorruption code of conduct Ι Occupational gender equality index Ι Personal Data Protection Policy Ι Suppliers relationship © 2021 All rights reserved

Fraud Warning

It has come to our attention that emails have been sent by individuals falsely claiming to be SADE employees. The objective of these emails is to place false orders using our company’s name. Read more…

In the emails detected to date, the fraudsters are writing from the addresses “[email protected]” or “[email protected]”. They use our logo and Paris 75014 address.

We wish to draw your attention to the fact that these email addresses do not correspond to SADE’s email address, which bears the domain name sade-cgth.fr.

We thus advise caution in your communication and request that you do not exchange documents or information with persons other than your usual contacts at SADE. If you are in any doubt, we advise you to speak to your usual contacts prior to the transmission of any document or information.

As fraudsters regularly change their operating mode, we also recommend you alert all your employees likely to have dealings in this area (purchasing, accounting or payroll, etc.).

SADE systematically lodges an official complaint in response to such acts. We would be grateful if you could notify us at the following address of any contact you may have had with individuals claiming to be employees of our company: [[email protected]]