Influence on Sediment Uplift During Sloshing by Columns in a Water Supply Tank

Abstract

In a water supply system, flocs and contaminants in the pipelines are deposited at the bottom of the water supply tank. The authors have confirmed that shaking table tests lift such sediments during sloshing excitation. By the way, large tanks are constructed with several columns inside the tank. In this study, we conducted shaking table tests of a model tank to clarify the influence of sediment uplifting by these columns. The results showed that in the case of the columns, the sediments began to rise from the bottom of the columns immediately after the excitation. The turbidity rose faster, the maximum turbidities were higher, and the high turbidities kept longer than those in the case without the columns.