STUDY ABOUT CURING OVERWINTER OF LINER SHEET AT CONTOROLLED SEA-BASED DISPOSAL SITE

Abstract

 Water pressure due to penetrating waves from the open sea, tide level propagation, or water level differences between the inside and outside before the final deadline is applied to the liner sheet in the controlled sea-based disposal site. When welding on the sea surface or curing during wintering is necessary, stability against the flow due to strong winds is also important. The study site has severe winds and waves in the winter, so it is necessary to cure the liner sheet during winter, and use a five-layer integrated liner sheet that has not been used in the whole surface impermeable works.

 The purpose of this study was to (1) examine the method of curing the liner sheet during wintering by observing the water level and flow in the water area in the disposal site, and (2) confirm the basic performance when the 5-layer integrated liner sheet was laid.