| Title |
Stability Evaluation on Particle Size Characteristics of Bed Materials at High-Velocity Flow |
| Authors |
김광수(Kim, Gwang Soo) ; 정동규(Jung, Dong Gyu) ; 김영도(Kim, Young Do) ; 박용성(Park, Yong Sung) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.4.0365 |
| Keywords |
세굴; 유실; 한계유속; 한계소류력; 토양 유실율; 안정성 Erosion; Soil loss; Limit flow velocity; Bed material |
| Abstract |
In general, domestic streams and rivers are composed of alluvial rivers consisting of sand and gravel beds. These rivers can cause erosion
and riverbed changes due to sudden changes in flow rates, such as floods, torrential rains, and heavy rains. In particular, there are various types of erosion, such as contraction erosion caused by changes in river shape, or local erosion occurring around obstacles such as piers, abutments or embankments. In addition, river changes can occur in various forms, such as static or dynamic periods, due to limitations such as flow rate, velocity, and shear stress. This study focused on the erosions of embankments directly related to human casualties among various river structures, and evaluated limit velocities and critical shear stress in order to identify changes in strength of natural materials by identifying the characteristics of natural hoan materials and resistance to erosions. In particular, the limitations of materials according to the type of materials in the river, characteristics of particles, and size of particles were studied using Soil loss, which is a change in the volume of the revetment material, and it is intended to be used as basic data for river design and restoration |