Physical Model Studies on high Permeable Silt Protector Sheet

Abstract

Silt protector sheets are widely used in order to prevent environments of surrounding area to underwater construction sites from diffusion of rolled up sediment load by the execution of works. Infiltration capacity of the silt protector sheets which being applied at present are almost the same as Darcy's permeability coefficient of fine sand. So that, caleft-lettul consideration is necessary to install the sheets at the place of high flow velocity. High permeable silt protector sheets were developed for the place of big discharged such as inflow point, junction. Hydraulic experiments were carried out in order to prove the permeability and silt diffusion protection capacity of new high permeable silt protector sheets. Permeability of new sheets are more ten times of usual sheets, and silt diffusion protection capacity are 1/3 of usual sheets.