Pile type offshore embankment, design method and application

A design method and single-pile technology, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve the problems of unsatisfactory wave absorption effect of permeable breakwaters, limit the application of permeable breakwaters, etc., and achieve good results Effects of modulation, shock elimination, and simple structural design

Active Publication Date: 2021-08-13
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under long-period wave conditions, the wave absorption effect of permeable breakwaters is not ideal, which limits the application of permeable breakwaters in practical engineering

Method used

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  • Pile type offshore embankment, design method and application
  • Pile type offshore embankment, design method and application
  • Pile type offshore embankment, design method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The utility model relates to a piled offshore embankment, and the arrangement structure of the piled offshore dike is in the form of a sinusoidal curve.

[0037] The sinusoidal wavelength of the control element of the piled offshore embankment (m) satisfy the grating theory, that is:

[0038]

[0039] in In order to shield the wave direction of medium-long and / or long-period waves within the scope of the sea area, is the corresponding wavelength, and the sinusoidal amplitude A is a non-control element, satisfying .

[0040] The spacing of the control element piles of the single piles of the piled offshore embankment With the number of single piles N, its main function is to block the incoming main wave of the sea area to be covered, which satisfies the multi-slit diffraction grating equation:

[0041]

[0042] in In order to cover the main wave direction of the sea area, is the dominant wavelength of the sea area to be protected, and N is the number ...

Embodiment 2

[0047] A method for designing piled offshore embankments, comprising the following steps:

[0048]S1. Collect the shoreline and water depth data near the area to be protected, as well as historical statistics such as the wind field of nearby hydrometric stations.

[0049] S2. Determine the scope of the sea area to be covered and the corresponding wave spectrum S ( ), the direction spectrum S ( , ) and determine the input condition of S3 from the wave spectrum and direction spectrum, the input condition is the main wave direction with dominant wavelength ; specifically include:

[0050] S21. Determine the concentrated frequency band range and spectral peak frequency of wave energy in the wave spectrum in the sea area to be shielded f 0 ,

[0051] S22. Determine the concentration distribution interval and main wave direction of the wave energy direction in the direction spectrum of the sea area to be covered ,

[0052] S23. Substitute the water depth and period da...

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Abstract

The invention discloses a pile type offshore embankment, a design method and application, and belongs to the technical field of coast engineering. The arrangement structure of the pile type offshore embankment is in a sine curve form. The design method comprises: collecting historical data such as a shoreline, water depth and a wind field near a to-be-shielded area; determining a to-be-shielded sea area range, a corresponding wave frequency spectrum and a direction spectrum, and calculating an input condition of S3; and determining the length L of the main axis of the offshore embankment, the sine wave length (m) of a control element in a sine curve arrangement form, the sine amplitude A of a non-control element, the spacing d of single piles of the control element, the number N of the single piles and the width a of the single piles of the non-control element. The interference of long-period waves can be effectively blocked through sinusoidal array arrangement, wave resonance of a to-be-shielded area is avoided, meanwhile, the interference of short waves can be effectively blocked through the single piles arranged in an array mode, the wave dissipation frequency is expanded from the narrow bandwidth to the wide bandwidth, and then the wave blocking efficiency of the pile type offshore embankment is improved.

Description

technical field [0001] The invention relates to the technical field of coastal engineering, and more specifically relates to a design method for piled offshore dikes. Background technique [0002] Offshore breakwaters (referred to as offshore dikes) are currently more effective and widely used coastal protection structures. Offshore dikes are generally built parallel to the shoreline in the offshore waters off the beach, and are mainly suitable for coasts dominated by wave erosion. Different from purely fixed shorelines (seawalls and revetments) or purely intercepted sediments (groves), offshore dikes block the waves in the open sea and reduce the wave energy near the shore, so that the sediment will fall behind the dikes, thereby promoting beach surface broaden. Some studies have shown that the offshore embankment can not only block the lateral movement of sediment, but the spit (or island dam) formed thereafter also has a certain ability to intercept sand transport along...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20
CPCG06F30/13G06F30/20
Inventor 梁丙臣葛洪丽张黎邦李华军夏天汪邵伟王晓霞
Owner OCEAN UNIV OF CHINA
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