Field observation of Soil Reinforcement Method by Wrapping System

Abstract

Among various kinds of soil reinforcement methods, as a foundation ground treatment measure for reinforced earth method, a method to wrap filling materials such as sands or crushed stones with a geogrid was adopted. By this method, it was expected that the rigidity of a reinforced body would be enhanced due to the combination of a geogrid and filling materials, and effectiveness would be increased in the improvement of bearing capacity of a structure, the prevention of irregular subsidence, and the decrease of the degree of subsidence.
It had been confirmed by table tests that in the reinforcement of soft ground, deformation characteristics of a reinforced body greatly affects the mechanism of bearing capacity. However, there are only few reports that describe the confirmation at actual construction sites and the deformation conditions of a geogrid. In addition, it is actual situation that even though various design techniques were proposed, a definite design method has not been established. In order to confirm the deformation characteristics of a reinforced body and the effects, the authors conducted the measurement of the degree of deformation of a whole reinforced body using a water-gage and the measurement of tension working on a geogrid using a tension-meter. This paper presents the deformation characteristics and the effect of a reinforced body obtained by this experiment