EVALUATION OF ANISOTROPIC PERMEABILITY IN SAND OR GRAVEL LAYER AT THE CONSTRACTION SITE

Abstract

When we design the length of a cut-off wall, it is very important to consider an anisotropic permeability of the ground. The purpose of this study is to evaluate an anisotoropic permeability in macro area of the ground. Our proposed method is using an inverse analysis of FEM model with measurements of flowrate, and drawdown at construction site. It was examined about the application of the method to multi layer ground. And anisotoropic permeability was shown at 9 construction sites. Further, relation anisotoropic permeability and N number, fine fraction, or articles of boring suevey were shown.