EXPERIMENTAL STUDY ON THE TENSILE STRENGTH RETENTION RATE OF SHELL-FILLED NETS USED FOR RIVER LEVEE BACKSLOPE EROSION CONTROL WORKS AFTER OVERTOPPING AND ACCELERATED DEGRADATION

Abstract

To address the increasing risk of levee overtopping due to extreme weather events, we propose a new shell net-type erosion control system. This system effectively prevents erosion by combining a crushed shell layer and a capillary barrier soil layer. In this study, a shell net-type erosion control system was laid in a sloping flume, and the tensile strength retention rate of the shell-filled net after 3 hours of overtopping with a flow depth of 0.3 m was measured.Accelerated degradation tests were also conducted under weather conditions and sand abrasion. As a result, it was confirmed that the tensile strength retention rate of the shell-filled net after overtopping and degradation under the specified conditions was 30% or more of the initial tensile strength experimentally demonstrating its practicality.