Abstract
In an attempt to study effects of saturation ratio on the strength parameters of partly saturated soils, several series of triaxial compression tests were comducted on samples of silty sands to silty clay which were recovered from several sites of landslides triggered by heavy rainfalls in recent years. The results of the tests on samples compacted to in-situ densities showed that both the angle of internal friction and cohesion tend to decrease significantly with increasing saturation ratio.
