STABILITY AGAINST WAVE ACTION AND DURABILITY OF WATERPROOF SHEET AT BULKHEAD

Abstract

When an offshore waste disposal site is constructed, the bulkhead which surrounds the site must be a waterproof structure to prevent substances contained in waste from leaking out to the sea. The waterproof sheet, which is placed in the backfill space of the bulkhead for this purpose, must be stable against the wave pressure and the hydraulic pressure induced by the difference of water levels between the outside and the inside of the bulkhead. In this study, hydraulic model experiments were conducted in order to examine the stability against wave action and durability of the waterproof sheet. It was proved that the strain of the waterproof sheet depended on the difference of water pressure between the outside and inside of the sheet, and the scale of the rubble.