Maritime structures

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Gabions groins

Groins are generally riprap structures that start on the shore, run perpendicular to the coast and extend seaward. Their purpose is to cut off lateral sea currents and protect the beaches around them. This is a heavy solution that can withstand high stresses and strains on the structure.

ACTUAL WEAKNESSES

These structures require a very substantial input of riprap, and the blocks laid can easily weigh several tonnes each. The logistical resources required to build such a structure are considerable, the cost of transporting the riprap is often colossal, and the carbon footprint of such a structure is extremely heavy.

Riprap has to be laid trapezoidally to hold in place, and the footprint of such a structure is consequently very large.

What’s more, these groins require regular and costly maintenance (3% to 8% per year of their construction cost) to ensure their continued effectiveness.

OUR SOLUTION

Seacure designs, sizes and installs gabion groins, whose coastal protection properties are identical to those of traditional methods, plus multiple advantages:

  • Reduced size of riprap required (e.g. 10 to 60kg pebbles instead of 1T to 3T)
  • Reduced footprint by almost half
  • Drastic reduction in the carbon cost of the structure, due to the reduced need for riprap and the greater ease of obtaining it close to the site of the structure.
  • Possibility of reusing demolition materials
  • Artificial reefs can be integrated into the structure

 

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Sand retention structures

For some coastal municipalities, erosion problems are reflected in significant sediment movement caused by sea currents and the reduction of their beaches.

ACTUAL WEAKNESSES

Every year, these municipalities are forced to allocate a substantial budget to recreate their beaches with sand and/or shingles.

OUR SOLUTION  

SEACURE develops innovative sand retention solutions for beaches and coastlines. Manufactured using the GEOCORAIL process, beach structures are installed in submerged or tidal range zones. They are dimensioned to suit site constraints and objectives.

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Riprap & structural support

There are numerous riprap structures along the coast: embankments, groins, jetties, etc.

Over time, and as a result of maritime stresses, significant movements of riprap can occur, requiring local authorities to refill their structures with riprap. In the case of static structures, providing additional support to the riprap while allowing wave energy to be absorbed can be an interesting way of ensuring the structure’s longevity and limiting maintenance costs.

ACTUAL WEAKNESSES

Scouring is the formation of a cavity under the infrastructure, caused by marine currents, the tide or the propulsion systems of docked ships.

OUR SOLUTION

To avoid the risk of scouring on a riprap structure, SEACURE offers retaining abutments consisting of gabions filled with shingle and covered with a rocky protective layer of GEOCORAIL. During the construction phase, these gabions are installed at the foot of the structure and on the foreshore. They are also intended to provide additional support for the first riprap elements in the lower section

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Let's keep in touch !

contact@seacure.fr