O2D Fertile Foundation for firemen access

Recommended deployment for the creation of a fertile foundation for green firemen access road:

- Preparation of base structure

         o  Mechanical or manual execution of excavation and backfill operations, up to the sides of the base structure: - 23 cm in relation to level 0
         o  Surface adjustment and levelling to an altimetric accuracy of +/- 2 cm/m
         o  Confirmation of a permeability coefficient K > 10^-6 m/s
         o  Confirmation of the load-bearing capability of ground such that EV2 > 60 MPa, where EV2/EV1 < 2
         o  Clean-up of roadways employed

- Installation of edging to the concrete foundation, the shoulder of which, at its highest point, is 8 cm below the levelled surface.

- Installation of a permeable anti-contaminant geotextile membrane

- Execution of a fertile draining foundation

         o  Adjustment, levelling and vibratory compaction of successive layers of an O2D® TP GREEN ready-to-use soil/stone mixture or equivalent:
                      - 75% crushed material of particle size 20/40 mm
                      - 25% organic substrate (topsoil/washed sand/compost) of particle size 0/10 mm
              Finished thickness after rolling: 15 cm (or - 8 cm from the levelled edging surface).
              The load-bearing level required on the soil and stone foundation material is such that EV2 > 60 MPa (EV2/EV1 < 2)

         o  Levelling and compaction of O2D® LP GREEN ready-to-use bedding course or equivalent:
                      - 60% crushed material of particle size 4/6 mm
                      - 20% topsoil/loam mixture of particle size 0/10 mm
                      - 20% sand of particle size 0/4 mm
              Finished thickness: 3 cm (or - 5 cm from the levelled edging surface).

- Installation of O2D FYNET laying mesh

- Installation of TTE® O2D GREEN pre-grassed grids, or installation of TTE® grids for grassing in situ.