SAND COVER STRUCTURE AND SAND COVER METHOD

摘要

PROBLEM TO BE SOLVED: To provide a sand cover structure and a sand cover method preventing contaminants from being scattered and diffused from sediment due to scouring action and sucking action without allowing the sand cover material to settle on the sediment by covering the sediment with a solidified layer having a low coefficient of water permeability by developing latent hydraulic property of a granulated blast furnace slag used for the sand cover material and solidifying the granulated blast furnace slag. SOLUTION: The sand cover structure is so constituted that a sand cover layer 2 on the sediment 3 becomes a granulated blast furnace slag layer solidified by receiving impetus from alkali or a granulated blast furnace slag containing layer 2. The sand cover method is so constituted that an alkali stimulant is brought into contact with either one or both of the sediment 3 and the granulated blast furnace slag layer or the granulated blast furnace slag containing layer 2 after the sand has covered the granulated blast furnace slag or a granulated blast furnace slag content 2 on the sediment 3. After the granulated blast furnace slag layer or the granulated blast furnace slag containing layer is solidified with the alkali stimulant, the sediment is dredged by a pump. COPYRIGHT: (C)2005,JPO&NCIPI