IN-SITU MEASUREMENT OF VERTICAL EARTH PRESSURE AND RAINWATER INFILTRATION BEHAVIOR IN CONTINUOUS FIBER REINFORCED SOIL

Abstract

The cohesion of continuous fiber reinforced soil resulting from a box shear test conducted under a low vertical stress condition is lower than that conducted under a high vertical stress condition. Moreover, the soil reduces in strength when water is infiltrated. However, there is no research of measuring the vertical earth pressure acting in continuous fiber reinforced soil, whose purpose is to protect surfaces of slope, or the rainwater infiltration behavior of the soil. In this study, we have measured both over about one year. The measurement results show that the acting vertical earth pressure is as low as 10-20 kN/m2, and that the soil saturation increases temporarily during execution or rain but is kept stable because of the water coming out of the soil quickly and the effect of plate-equipped anchors.