Method for quickly predicting local scouring depth of ocean pile

Abstract

The invention provides a method for quickly predicting the local scouring depth of an ocean pile. The method comprises the steps that firstly, parameters of fluid, sediment and a pile foundation are determined, wherein the parameters include the ocean current flow speed, the seawater depth, the sediment particle size and the pile foundation diameter; then dimensionless parameters influencing the local scouring depth of the seabed around the pile are obtained; the processed dimensionless parameters are substituted into a calculation formula of the local scouring depth of the seabed around the pile to obtain the local scouring depth of the seabed around the pile; and then the local scouring depth of the adjacent pile foundation is predicted through the scouring depth of the pile foundation in combination with the distance between the two pile foundations and the incoming flow included angle. According to the method, the local scouring depth of the pile foundation in the marine environment can be simply and conveniently predicted, the local scouring depth of the downstream pile foundation can be rapidly predicted according to the scouring depth of the upstream pile foundation, the method can be better applied to engineering design, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for quickly predicting the local scour depth of marine piles. Background technique [0002] The marine pile foundation has been subjected to ocean loads such as waves and currents for a long time in the ocean, and local scours are prone to occur. In marine development projects at home and abroad, there have been many catastrophic marine pile foundation collapse accidents. Therefore, it is very important to reasonably predict the local scour depth of marine pile foundations to ensure the safety and stability of pile foundations. At present, the prediction of local scour depth for pile foundations is mainly based on the calculation of scour depth of pier in the river environment. In my country, the formula specification for calculating the local scour depth of the seabed around the pier piles is to use the two formulas proposed in the "Code for Design of Hydrol...

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Problems solved by technology

[0003] However, the local scour depth of pile foundations in the existing codes and studies is mainly based on the calculation of the scour depth of piers in the river environment, and only for the local scour calculation of a single pile foundation, without considering the differences in the marine environment and the two piles. Interaction between bases and their corresponding scour depths

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