The development of banks consists of erecting along a bank damaged by erosion, a retaining "wall" and filling the space left empty by nidaplast panels or blocks.
Between the sheet piles and the nidaplast honeycomb, a geotextile material is generally placed which allows water to pass through and must retain fines and stones.
The nidaplast blocks and panels allow fluctuations in the water table without creating overpressure on the side of the bank which "pushes" the structure and which could break it.
The advantage of this technique is that it can withstand significant floods and strong hydraulic stress and prevent any possible landslide.
Development of bank lanes with lightened honeycomb backfill
As part of a reconquest of the banks of the Maine and its bordering areas, 800 m3 of nidaplast RA honeycomb blocks were installed to reduce the vertical load applied to the tie rods that hold the sheet piles, along the Maine (tributary of the Loire, which passes through the heart of Angers).
6 layers of nidaplast RA form a light backfill along the bank and provide a draining and resistant solution.
Development of banks near an EDF power plant
Located near the coast, Cordemais is a neighboring town of Nantes which is flush with the Loire river.
To gain in useful surface on the river, to solve the problem of low bearing capacity, erosion and the development of the banks, ultralight honeycomb structures (SAUL) nidaplast RA were put in place in backfill as well as structures of sheet piling types on the river side.
Thanks to their lightness and their ultra-light honeycomb structure (SAUL), composed of 95% vacuum, nidaplast RA blocks allow the construction of a non-heavy backfill insensitive to fluctuations in the level of the river.
Sheet piles, for their part, prevent any erosion due to wake. Nidaplast RA blocks are positioned on a draining backfill and covered with a geotextile on which a topsoil type backfill is applied.