The Plastic Drain Considered Regularity of Bending Property

Abstract

The plastic drain method is often used at the very soft ground improvement construction field for consolidation time saving and increase of soil strength by shortening of consolidation drainage distance.
As this drain material has no comprssibility, material is corresponded by the bending at the ground settlement. Now, traditional drain materials are bended freely at the any parts of drain by the homogeneous rigidity of longitudinal direction. There is some possibility of problem between design assumption and field by the large partial bending of drain material. The influence of this phenomenon at the ground improvement result is considered, model tests of bending of drain materials in the soils were performed.
This paper described the results of the above tests and the plastic drain material that has regularity of bending property by the regular reduction parts of drain material rigidity.