Drained Triaxial Behaviour of SCP-reinforced Composite Ground with Low Area Replacement Ratio

Abstract

Shear strength parameters and elastic parameters play an important role in design and analysis, especially in stability analysis and block analysis by finite element analysis. Most researchers have performed an undrained triaxial test to estimate these parameters. As sand piles installed into the ground also act as a drainage channel in the condition of a low area replacement ratio, it is more reasonable to consider that the composite ground experiences a drained shear. This study performed a series of conventional drained triaxial tests on the specimen-installed sand compaction pile to investigate the composite behavior according to the area replacement ratio and the rate of shear and confined stress. In the composite ground with a low area replacement ratio, in spite of the fact that the stress-strain behavior is similar to that of sand, variation of shear strength parameters and elastic parameters according to the area replacement ratio show some unique relations to the properties of original clay.