Water tank test method for local scouring of foundation under supercritical flow condition

Abstract

The invention discloses a water tank test method for local scouring of a foundation under a supercritical flow condition. The water tank test method employs a laboratory regeneration control method combining surface shock waves and high-speed water flow, shock waves generated by crushing waves on a gentle slope and a high-Froude-number fluid generated by a narrow water flow are regenerated in a wind wave gutter channel, a model sand local starting power condition is used for controlling local scouring of an engineering structure foundation, so that a structure foundation scouring experiment measuring section under the supercritical flow condition is constructed, and a high-precision data source is generated for prediction of foundation scouring pits in offshore wind power and water conservancy projects and corresponding protection engineering design.

Description

technical field [0001] The invention belongs to the technical field of foundation scouring in offshore wind power and water conservancy projects, and in particular relates to a water tank test method for local scouring of foundations under supercritical flow conditions. Background technique [0002] In the inland shelf sea area where the water depth is less than 20 meters, the tidal wave is limited by the water depth and terrain, and the deformation is relatively large, so the local scour of the foundation cannot be well solved by numerical simulation. The existing local scour flume test methods usually directly simulate the scour of the prototype foundation under the action of waves and currents to obtain the shape of the scour pit. A supercritical flow state includes: 1. Shock wave flow caused by surface wave breaking; 2. Volumetric supercritical flow, such as shallow water tidal current and coastal flow composed of breaking wave flow; Sliding, rolling, jumping, and layer...

AI Technical Summary

Problems solved by technology

The existing local scour flume test methods usually directly simulate the scour of the prototype foundation under the action of waves and currents to obtain the shape of the scour pit. A supercritical flow state includes: 1. Shock wave flow caused by surface wave breaking; 2. Volumetric supercritical flow, such as shallow water tidal current and coastal flow composed of breaking wave flow; Sliding, rolling, jumping, and layer shif

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