Shaking Table Tests of Embankment Models Reinforced with Geotextiles - Reinforced Soil Engineering: Advances in Research and Practice - page 396

Figure 24 Settlement (DV2) at berm.

The reinforcement effectiveness with three sheets is appreciable, but four
sheets of geogrid is more effective. The test results of Cases 3 and 4 with 460 gal
show that there was no difference in the effectiveness with four and six sheets of
geogrid. The fourth sheet of geogrid was located between the saturated and
unsaturated zones of the embankment. The test indicated that the reinforcing
effect of geogrids in the saturated zone was small.

3.1.2 Large-Scale Model

Experimental method and results: Figure 25 is a depiction of the large-scale
model. The rock zone was created by using gravel, and in the area adjoining the
sand foundation, sheeting was installed and overlain by a mixture of sand and
gravel. With that, let us examine the results of the experiments. Figures 25 and 26
show two cases—Case 1, in which there was no reinforcement, and Case 2, in
which reinforcement was provided by sheets. The sandy section of the dam had a
relative density of 50%. The sheet was installed as shown in Fig. 26.
The modeling for Case 3 was done in the same way as for Case 1. The
geogrids were anchored in the rock zone and installed as shown in Fig. 27 .

Figure 25 Large-scale land reclamation model (Case 1).