Kazuya Maekawara

Study on seepage flow in the lower ground of riverbed structure

Hosoyamada Tokuzou

 Conventionally, riverbed structures such as floor stoppers and root consolidation work have been made to prevent riverbed reduction and local scouring. However, some of the riverbed structures that have been established in the past can not be kept river beds, or cases where the structures of the riverbed structures themselves can not be kept safely due to local scouring and the like, and they have been damaged and deformed. It is considered that this is because the prediction method of river bed change for the riverbed structure considering both the permeation flow inside the ground and the water surface variation at the top of the ground are unclear. Based on this background, we focused on the dynamics of seepage flow in the lower ground part of the riverbed structure and decided to conduct this research with the aim of enabling new river bed change prediction by elucidating its mechanism. In order to understand the process leading to river bed fluctuation, it is necessary to identify phenomena causing external forces. In this research, in the field of water engineering, we investigate the seepage flow and the pressure in the ground which were not often noticed so far in relation to the shape of the structure.
 In this study, we constructed a simulation that takes into consideration the penetration flow in the ground and the flow of the water part at the same time, and evaluated its consistency.We have constructed a visualization simulation with a clear and dynamic change than before, and confirmed its consistency from the analysis results.