A STUDY ON THE ESTIMATION OF PERMEABILITY OF AN AQUICLUDE LAYER IN DEEP ZONE NEAR AN EARTH RETAINING, CUT-OFF WALL DURING CONSTRUCTION OF KAWASAKI MAN-MADE ISLAND

Abstract

This paper is concerned with the estimation of permeability of an aquiclude clay layer in deep zone during construction of Trans-Tokyo Bay Highway and Kawasaki Manmade Island. The estimation was tried before and after construction of diaphragm walls.
First, the estimation of permeability of clay layer before the construction of the wall was simulated by pumping tests and Hantush's conventional t-s type curve method. Second, we estimated the permeability of clay layer after the construction of the wall by using ‘permeability estimation element’ in the model.