BLOCK SUBSIDENCE UNDER PRESSURE AND FLOW

Abstract

The block subsides gradually into sandy bed under water pressure fluctuation. In actual coast the oscillatory flow also acts on the block. The block subsidence is reproduced qualitatively in a laboratory. The subsidence occurs even under the oscillatory flow. Under some combinations of water pressure fluctuation and oscillatory flow, the subsidence is larger than any of the subsidence under the pressure fluctuation only and the subsidence under the oscillatory flow only.