CN109797710B

CN109797710B - Double-row cylinder open breakwater

Info

Publication number: CN109797710B
Application number: CN201910170551.5A
Authority: CN
Inventors: 季则舟; 吴波; 李超; 李斌; 胡珅榕; 侯伟; 冯璐; 魏芸; 马瑞; 王丽芳; 李承钢
Original assignee: CCCC First Harbour Consultants Co Ltd
Current assignee: CCCC First Harbour Consultants Co Ltd
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2022-12-30
Anticipated expiration: 2039-03-07
Also published as: CN109797710A

Abstract

The invention discloses a double-row cylindrical open breakwater which comprises a front row and a rear row of cylindrical rows which are vertically inserted into a seabed and are provided with cylinders arranged at intervals, and a wave baffle plate positioned on the axis of the rear cylindrical row. The axes of the front and rear cylinder rows are parallel, and the top elevation of the front cylinder row is lower than that of the rear cylinder row. The cylinders of the front cylinder row and the cylinders of the rear cylinder row are arranged in a staggered manner, and wave dissipation holes can be formed in the wave-facing side of each cylinder. The breakwater is connected with the cylinder as an independent unit during construction, or is prefabricated and connected with the cylinder as a part of the cylinder unit; the top elevation of the connecting part of the mud-pumping device and the cylinder is not lower than the top elevation of the cylinder, and the bottom elevation is higher than the elevation of the mud surface. The invention has the beneficial effects that: the requirements of water permeability, wave eliminating effect and stability can be met simultaneously; the basic shielding effect of the breakwater is met, the influence on the in-situ hydrodynamic condition is small, and the breakwater has good ecological environmental protection performance; meanwhile, the structure is simple, the construction is convenient, and the popularization is easy.

Description

Double-row cylinder open breakwater

Technical Field

The invention belongs to the field of building structures in coastal engineering and port engineering, and particularly relates to a double-row cylindrical open breakwater.

Background

At present, the requirements of national policies on ecological environment are increasingly strict, the influence on marine ecology is required to be reduced during port engineering production and construction activities, and mountain mining and stone mining are strictly limited. The permeable breakwater is a breakwater composed of pier columns and a wave-retaining structure submerged in water to a certain depth, has the characteristics of small change to in-situ hydrodynamic conditions and no or a small amount of stones required in the construction process, and is a very ecological and environment-friendly breakwater structure form. For the areas with strict ecological and environmental requirements, the open breakwater is the preferentially selected breakwater structure type.

At present, the open breakwaters are mostly based on pile foundation breakwaters. The permeable breakwater achieves the shielding effect mainly by means of the wave-dissipating function of the upper structure. Under the action of complex sea conditions, in order to achieve a satisfactory wave-dissipating effect, the design of an upper structure is too complex, so that the construction is difficult. And a cylindrical permeable breakwater with simpler construction is adopted in the permeable breakwaters. The large-diameter cylindrical permeable dike and oscillating water column wave energy power generation device with the Chinese patent number of 201610781366.6 adopts a cylindrical breakwater, wherein the breakwater only adopts a row of cylinders, and the water permeability is met by the cylinders at certain intervals. Obviously, if the cylinder pitch is too small, the water permeability cannot be satisfied; if the spacing is too large, the shield effect is not satisfied. Namely, the single-row cylinder structure hardly gives consideration to the water permeability, the wave eliminating effect and the stability. Especially, under the sea condition of long-period waves, the water permeability of the breakwater is often abandoned in order to meet the wave-breaking effect and stability.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a double-row cylindrical open breakwater which can reduce the influence on the in-situ hydrodynamic condition as much as possible and meet the requirements of the current national policy on ecological environment protection on the premise of meeting the basic requirements of the breakwater on wave dissipation effect, stability and the like.

The technical scheme adopted by the invention for realizing the purpose is as follows: a double-row cylinder open type breakwater comprises a front cylinder row, a rear cylinder row and a wave blocking plate, wherein the cylinder row is formed by arranging a plurality of cylinders which are vertically inserted into a seabed at certain intervals, and the axes of the front cylinder row and the rear cylinder row are parallel and are at certain intervals; the breakwater is positioned on the axis of the rear cylinder row and is connected with the upper end of the cylinder.

Further, the top elevation of the front cylindrical row is lower than the top elevation of the rear cylindrical row.

Further, the cylinder spacing is not greater than the minimum cylinder diameter, and the cylinders of the front cylinder row and the cylinders of the rear cylinder row are arranged in a staggered manner.

Preferably, the wave breaking holes are selectively opened or not opened on the wave-facing side of the cylinder.

Furthermore, the interior of the cylinder body can be backfilled with materials, wherein the backfilling range is above the mud surface and below the wave dissipation holes.

Preferably, the cross-sectional shape of the cylinder can be circular or oval, the diameter of the cylinder in the front row can be the same as or different from that of the cylinder in the rear row, the material can be steel or reinforced concrete, and a partition plate can be arranged or not arranged in the cylinder.

Preferably, the breakwater can be connected with the cylinder during construction as an independent unit, and can also be prefabricated and connected with the cylinder as a part of the cylinder unit; the wave blocking plate can be a plane plate or a curved plate; the top elevation of the connecting part and the cylinder is not lower than that of the cylinder, and the bottom elevation is above the elevation of the mud surface.

Preferably, the breakwater can be perforated or not perforated, and the material can be steel or reinforced concrete material.

The invention has the beneficial effects that: only two basic units, namely a cylinder and a wave blocking plate, are adopted, so that the structure is simple, and the construction is rapid and convenient; the energy dissipation concept of the double-row cylinders is creatively provided, a large energy dissipation chamber is formed between the double-row cylinders, and a satisfactory wave dissipation effect can be obtained under a complex sea condition by combining a small energy dissipation chamber formed after the cylinder body is provided with the hole and the reflected wave energy effect of the breakwater; the double-row cylinders adopt a design of being low in front and high in back, so that the wave force distribution of the front and back cylinder row structure is more reasonable, and the structural stability is more facilitated while the materials are saved; the diameter of the cylinder, the distance between the cylinders, the height of the wave blocking plate and the hole opening mode can be adjusted according to actual conditions, the shielding effect is guaranteed, and meanwhile the influence on the in-situ hydrodynamic condition is reduced as much as possible.

In summary, the invention only adopts two basic units, namely the cylinder and the wave blocking plate, and meets the requirements of water permeability, wave eliminating effect and stability at the same time by adjusting the distance of the cylinder rows, the interval of the cylinders, the height of the wave blocking plate and the hole opening mode. The basic shielding effect of the breakwater is met, the influence on the in-situ hydrodynamic condition is small, and the breakwater has good ecological environmental protection performance; meanwhile, the structure is simple, the construction is convenient, and the popularization is easy.

Drawings

FIG. 1 is a top view of the double row cylindrical open breakwater of the present invention;

fig. 2 is a cross-sectional view perpendicular to the breakwater axis of the double row cylindrical permeable breakwater according to the present invention;

fig. 3 is a three-dimensional perspective view of the double-row cylindrical permeable breakwater according to the present invention.

Wherein:

1. front cylinder row 2, rear cylinder row 3 and front cylinder row

4. Rear row cylinder 5, wave blocking plate 6 and wave dissipating hole

7. Backfill material 8, mud face

Detailed Description

The double-row cylindrical permeable breakwater according to the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 3, the breakwater is mainly constructed by a front cylindrical row 1 located on the seaside, a rear cylindrical row 2 located on the harbor side, and breakwaters 5 connected to the rear cylindrical row 4. The water area between the front cylinder row 1 and the rear cylinder row 2 can be regarded as a large-scale energy dissipation cavity. In order to achieve the best energy dissipation effect, the front-row cylinders 3 and the rear-row cylinders 4 are arranged in a staggered mode, and the inner diameter of each cylinder is not larger than the distance between the cylinders, namely, no gap exists between the projections of the front-row cylinders 3 and the rear-row cylinders 4 on the vertical axial plane of the breakwater. In order to save raw materials and reasonably distribute wave force, the top elevation of the front row of cylinders 1 is lower than the top elevation of the rear row of cylinders 2. The wave-dissipating hole 6 is arranged on the wave-facing side of the cylinder, and a small energy-dissipating cavity is formed in the cylinder. The cylinder may be backfilled with a material such as rock or sand 7 to maintain the stability of the cylinder. Two sides of the rear row cylinder 4 are respectively provided with a wave blocking plate 5 along the axial direction of the rear cylinder row 2, and adjacent wave blocking plates are in close contact to reflect wave energy. According to specific construction conditions, two measures can be taken for the arrangement of the breakwater 5: one is to prefabricate and connect the breakwater 5 with the rear row cylinder 4, so the construction does not need to consider the connection problem of the component; one is to provide connectors at both sides of the rear row cylinder 4 and to connect the breakwater 5 with the rear row cylinder 4 in the construction process. In order to meet the requirements of water permeability and wave blocking, the top elevation of the wave blocking plate 5 is not lower than that of the rear cylinder row 2; the bottom elevation should be higher than the mud level 8 elevation.

Claims

1. A double row cylindrical openwork breakwater comprising: preceding cylinder row, back cylinder row and manger board, its characterized in that: the front cylinder row and the rear cylinder row are respectively formed by arranging a plurality of cylinders which are vertically inserted into a seabed at intervals; the axes of the front cylinder row and the rear cylinder row are parallel and are provided with row spacing distances, the front cylinder row is positioned at the overseas side, and the rear cylinder row is positioned at the harbor pond side; the wave blocking plate is positioned on the axis of the rear cylinder row and is connected with the upper end of the cylinder; a clapboard is arranged in the cylinder;

the wave dissipation holes are symmetrically formed in the side surface of the cylinder, and the positions of the holes are kept away from the right front; the section of the cylinder is circular or oval, the diameter of the cylinder of the front cylinder row is the same as or different from that of the cylinder of the rear cylinder row, and the material is steel or reinforced concrete;

the distance between the cylinders is not more than the minimum cylinder inner diameter, and the distance between the rows of the front cylinder and the rear cylinder is 0.2 to 1.0 time of the wavelength; the cylinders of the front cylinder row and the cylinders of the rear cylinder row are arranged in a staggered manner.

2. The double row cylindrical permeable breakwater of claim 1, wherein: the top elevation of the front cylinder row is lower than that of the rear cylinder row.

3. The double row cylindrical permeable breakwater of claim 1, wherein: the cylinder is internally provided with a backfill material, and the backfill range is above the mud surface and below the wave dissipation hole.

4. The double row cylindrical permeable breakwater of claim 1, wherein: the wave blocking plate is a plane plate or a curved plate; the top elevation of the wave board is not lower than that of the rear cylinder row, and the bottom elevation is higher than that of the mud surface.

5. The double row cylindrical permeable breakwater of claim 4, wherein: the upper surface of the breakwater is provided with holes or is not provided with holes, and the breakwater is made of steel or reinforced concrete.