Analysis of Factors Affecting Damage of the Concrete Check Dams Based on the Exterior Condition Assessment

Abstract

This study assesses the exterior condition of concrete check dams and analyses the factors such as the watershed area, check dam length, deposit length, and elapsed years which can affect the damage of concrete check dams. After the survey of 426 concrete check dams built in Gangwon province, we found that although all the factors have statistical significance, the elapsed year of construction is most closely related to the condition of the dams. In other words, the elapsed year is the most influential factor among the analysed ones; the watershed area(R=-0.121, p<0.05), dam length(R=-0.183, p<0.01), deposit length(R=-0.274, p<0.05), and elapsed years(R=-0.852, p<0.01). In addition, it is considered that the detailed inspection cycle of dams can be set as 15 years after construction because the assessing point less than 2.5 which indicates the need of urgent repair and reinforcement starts to appear after 15 years of construction. Since this study is limited to impermeable concrete dams, the supplementary research on dam types and materials is required.