A consideration of measuring strain of the very thin geotextile

Abstract

The authors succeeded in measuring strain of the very thin geotextile in the centrifuge scale model test for investigation the dynamic behavior of the reinforced wall with geotextiles. This type of experiments are in good accordance to the law of similarity, but it must be used with very small and thin reinforcement, due to the law of similarity. So we choose the very thin non-woven fabric for reinforcement. It is very difficult to measure strain of the very deformable material like thin geotextile. The selection of strain gauge and the adhesive is very difficult. Especially, in the measuring of dynamic strain like in our case, it can not be sured that result of measuring has high reliability by the normal technique of electrical strain measurement.
The authors obtained complete measuring result of strain of the very thin geotextile (non-woven fabric) in the centrifuge scale model tested under 30G of centrifugal acceleration using the wide range strain gauge attached to the thin non-woven fabric with special adhesive. These results were well compared to the calculation and other results of large scale model test.