Local scouring forecast method of coastwise wind-electricity tower footing of muddy coast

Abstract

The invention discloses a local scouring forecast method of a coastwise wind-electricity tower footing of a muddy coast, which comprises the following steps of: constructing a two-dimensional tidal current mathematical model and a two-dimensional wave mathematical model of an engineering sea area respectively, analyzing the hydrodynamic condition of the engineering sea area by the two-dimensional tidal current mathematical model and the two-dimensional wave mathematical model and providing oceanic kinetic parameters for determining the maximum depth of the local scouring of the wind-electricity tower footing; selecting Jones and Sheppard formulae which are suitable for bed load which is silver sand particles and an Hanhaiqian formula as a fundamental formula for estimating the local scouring depth of the wind-electricity tower footing of a coastwise wind farm of the muddy coast; and forecasting the maximum depth of the local scouring of the wind-electricity tower footing of the coastwise wind farm of the muddy coast by adopting the modified formula. The invention can better reflect the motion rules of the tidal current and the wave of a prototype, can provide the reliable oceanic kinetic parameters for the calculation of the local scouring depth of the wind-electricity tower footing and has a reasonable and credible calculation result.

Description

technical field [0001] The invention relates to a method for forecasting local erosion of offshore wind power tower foundations on muddy coasts. Background technique [0002] For offshore wind farms, due to the joint action of waves and currents, local scour will occur around the wind power tower foundation, which may affect the stability of the wind power tower foundation. Researching and analyzing the local scour of wind power tower foundations under the combined action of waves and currents has important theoretical and practical significance for the foundation design of wind turbine tower foundations in offshore wind farms. [0003] At present, my country's offshore wind power has just started, and there is no domestic formula for calculating the scour of offshore pile foundations. The scour depth of wind power tower foundations plays a vital role in the design of wind power tower foundations, and the scour depth needs to be considered from the aspects of technology, eco...

AI Technical Summary

Problems solved by technology

[0007] First of all, there are many research results on the local scouring of piles on rivers, but there are few research results on local scouring of piles in the ocean because the effects of tidal currents and waves in the ocean are much more complicated than the effects of water flow in rivers;

[0008] Secondly, most of the model studies only consider the case of coarse sand. Since there are few studies on the local scour of piles in muddy and silty coasts, there is no calculation model that is completely suitable for the local scour of piles in this type of coast.

[0009] Third, many studies only consider the effect of tidal currents on the local scouring depth of piles, and the wave action is often not reflected in the formula, ignoring the wave action, and the formula is not corrected in this respect, so the formula There is a large gap between the calculated results and the actual situation

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