Model Tests of Seismic Stability of Several Types of Soil Retaining Walls - Reinforced Soil Engineering: Advances in Research and Practice - page 312

Figure 2 Details of typical wall model.

horizontal L-shapemetals. To reinforce the base, metal plates having a thickness of
10mmwere inserted at its middle level. The surfaces of the facing and base parts in
contact with the backfill and subsoil layers were made rough by gluing sandpaper.
For the reinforced soil RW models, a grid of phosphor-bronze strips was
used as the model reinforcement. To form a model grid reinforcement layer, strips
having a thickness of 0.1 mm and a width of 3mmwere soldered to each other at an
interval of 50 mm in the longitudinal direction, in parallel with the side wall, and
100mm in the transverse direction, in parallel with the facing, as shown in Fig. 3 .
To effectively mobilize friction between the reinforcement and the backfill, sand
particles were glued on the surface of the strips. The details of the model wall and
reinforcement configurations are described in Koseki et al. (1998a).

4 BACKFILL AND SUBSOIL MATERIAL

Air-dried Toyoura sand, having e max ¼ 0.977, e min ¼ 0.605, G s ¼ 2.64,

D 10 ¼ 0.11mm, and D 50 ¼ 0.23mm, was used to form the backfill and subsoil