Uretek® secures the Quai de la Divette in Cherbourg thanks to injections of expansive resin

Problematic

Indeed, over time, the tidal movements caused by the trade basin created significant subsidence of the ground, endangering the safety of passers-by.

The cement grout injection technique could not be considered, risking polluting the waters of the canal. The use of micropiles with a supported slab would have required long months of work, with a significant impact on the final cost.

Solution

The URETEK® expansive resin injection process was therefore chosen for this work, representing the best solution in terms of cost, speed, implementation and efficiency. In addition, URETEK® resins are perfectly suited to submerged or buried works, because they do not wash out and can polymerize in water.

Thus, it was under conditions made difficult by the heavy rains and the presence of numerous underground networks, that the company URETEK® treated 160 linear meters of riprap at the edge of the basin, thanks to its Floor Lift process.

In the end, the site lasted only 13 days, without hampering road traffic, and perfectly meeting the specifications in terms of time and environment.

Benefit

• The URETEK® resin injection processes are particularly suitable for maritime structures (bridge, breakwater, bank, retaining wall, lock, etc.)
• Economic process and quick to implement unlike traditional methods of recovery in underpinning (pile or micropile type).
• The URETEK Deep Injections® process holds the CSTB Technical Notice n ° 3 / 15-796, valid until 31/03/18.