Unit Cell Testing of Reinforced Soils - Reinforced Soil Engineering: Advances in Research and Practice - page 61

Figure 14 (c) Test results under drained conditions. [(a)-(c) From Ling, 1993; Ling
and Tatsuoka, 1994.]
stiffness resulted in large reinforcement effects for drained conditions. Under
undrained conditions, very little reinforcement effects were realized.
4 THEORY OF REINFORCEMENT WITH REFERENCE TO
STRAIN FIELDS
Instead of a theory based on the stress and strength of the materials, some
researchers, such as, McGown et al. (1978), Bassett and Last (1978), and
Tatsuoka (1986b), investigated the strain fields in reinforced soil mass. The study
was theoretically conducted, with the aid of the Mohr circle of strain increment
(Fig. 15).
In the Mohr circle of strain increment, the pole or origin of planes
determines the directions of the major and minor principal strain increments 1˙ 1