Reverse arc-shaped bulwark and computing method for total horizontal wave force of bulwark

Abstract

The invention discloses a reverse arc-shaped bulwark. The bulwark comprises a front wall and a square caisson structure, wherein the front wall is of a continuous semicircular-cylinder-shaped arc-shaped wave-ward surface structure, and the square caisson structure is arranged behind the front wall. According to a computing method for total horizontal wave force of the reverse arc-shaped bulwark, computing is performed through the following formulas that P=KPPZ, and the correction factor KP=0.91. The reverse arc-shaped bulwark has the advantages that the reverse arc-shaped bulwark is similar to a straight wall type bulwark in vertical pressure distribution, the position nearby the static water level belongs to triangular distribution, and the position below the static water level belongs to parabolic distribution; according to annular pressure distribution of the reverse arc-shaped bulwark, when a wave crest acts, the wave pressure intensity of central section of each arc is the maximum and decreases with the increase of the angle of each arc; when a wave trough acts, the wave pressure intensities are basically equal and are evenly distributed. A revised Goda formula should be adopted for computing the total horizontal wave force of the bulwark, and computing and analysis show that the total horizontal wave force of the reverse arc-shaped bulwark is about 10% smaller than the wave force of the straight wall type bulwark of the same size.

Description

technical field [0001] The invention belongs to the technical field of coastal engineering, and relates to a breakwater composed of a semicircular continuous anti-arc structure, and also relates to a calculation method for the total horizontal wave force of the anti-arc breakwater. Background technique [0002] In order to meet the requirements of large-scale ships, deep-water and specialization of ports and wharves, higher requirements are put forward for deep-water breakwaters as the main hydraulic structures of ports. The cylindrical structure has been widely used because it can meet the requirements of deep sea water, large waves and complex geological conditions. The wave pressure on the cylindrical structure is a radial force, and the horizontal component forces of the wave pressure along the longitudinal axis of the circular caisson will cancel each other out, and the structure is in a good stress state. In addition, the cylindrical structure also has many advantages...

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Problems solved by technology

However, the cylindrical breakwater also has its disadvantages. Since the frontal surface is composed of multiple semi-cylindrical curved surfaces, the wave crests will quickly separate and advance to both sides after touching the cylinder.

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