The full-height rigid (FHR) facing confines effectively the backfill by developing high earth pressure. Therefore, high connection force and high tensile force develop in the reinforcement layers. As a result, the backfill, in particular in the zone immediately behind the wall face, becomes very stable. Even if part of the wall is damaged locally, it does not develop into the failure of the whole wall.
Moreover, the FHR (full-height rigid) facing can be used as a foundation for other structures, such as crash barriers, noise/wind barriers, electric power supply poles etc. Unlike other types of reinforced soil RWs having a facing that is not FHR (e.g., discrete panels or modular blocks), roads and railways can be arranged very close to the wall face relying on high stability of the reinforced backfill immediately behind the FHR facing.
Recently, many railways (including high-speed railways) use continuous RC slab tracks because of a high lifetime cost-effectiveness resulting from very low maintenance cost despite relatively high construction cost. However, RC slab tracks cannot be constructed on ordinary embankment and the backfill retained by conventional RWs due to their potentially high residual deformation. On the other hand, RC slab tracks are constructed without any problem on RRR GRS RWs because of very small residual deformation of the backfill that is well-compacted and stabilized by taking advantage of closely arranged geosynthetic reinforcement layers (with a vertical spacing of 30 cm) that are firmly connected to the FHR facing.