CN210086156U - Local structure of widening of channel of entering port of wave height in reduction port - Google Patents
Local structure of widening of channel of entering port of wave height in reduction port Download PDFInfo
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- CN210086156U CN210086156U CN201920469496.5U CN201920469496U CN210086156U CN 210086156 U CN210086156 U CN 210086156U CN 201920469496 U CN201920469496 U CN 201920469496U CN 210086156 U CN210086156 U CN 210086156U
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- harbor
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000001133 acceleration Effects 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The utility model discloses a local widening structure of a harbor channel for reducing wave height in a harbor, which comprises a channel widening groove which is excavated at the entrance of a breakwater of a harbor pool and is positioned at the wave-facing side of the harbor channel, and the plane shape of the channel widening groove is a parallelogram structure; an included angle between the long side of the parallelogram and the axis of the entrance channel is a widening angle; one of the two short edges of the parallelogram is superposed with the channel edge at the wave-facing side of the incoming channel; the widening distance of the channel widening groove is the vertical distance between the long side of the parallelogram on the wave-facing side and the breakwater head of the harbor basin breakwater on the wave-facing side; the length of the channel widening groove is equal to the length of the long side of the parallelogram; the width of the channel widening groove is the product of the short side of the parallelogram and the sine value of the widening angle; channel widening groove depth = harbor channel water depth; channel widening groove side slope = channel side slope of entering port. The utility model discloses the advantage lies in having that the investment is little, the effect is showing, the construction is maintained portably, can reduce the interior wave height of harbor by a wide margin.
Description
Technical Field
The utility model relates to a structure of channel of advancing in port especially relates to the structure is widened to the channel of advancing in port part that reduces the interior wave height of port.
Background
The refraction of waves by the channel has a great influence on the harbour berthing conditions. In recent years, in numerous port engineering construction examples at home and abroad, it is found that the construction of the harbor channel can cause the wave height of a harbor area to be redistributed; from the arrangement of the breakwater, the wave height of the wave direction waves with the original good shielding conditions in the harbor after the deep water channel is excavated cannot meet the mooring requirement, and the wave height of the wave direction waves with the original relatively poor shielding conditions is far smaller than the expected value.
When waves enter the channel at an angle of 20-60 degrees (particularly 30-40 degrees), the wave energy enters the channel in a critical angle convergence type, the height of the waves in the harbor is the largest, and the harbour berthing stability condition is the worst. At the moment, the wave direction corresponding to the incident waves is the strong wave direction, and the superposition of the normal wave direction and the strong wave direction needs to be avoided as much as possible in the earlier-stage plane planning of the port, namely, the included angle between the normal wave direction and the channel is avoided to be between 20 and 60 degrees.
However, in the plane planning of the port channel, due to the interference of the original building, the limitation of the terrain and other considerations, the included angle between the planned channel and the normal wave direction is just within the range of 20-60 degrees, so that the harbour berthing condition cannot be completely guaranteed, at the moment, other engineering measures (such as building of hydraulic buildings) are required to reduce the wave height in the harbour to improve the berthing condition, and high construction cost is required to be invested, and the construction difficulty is extremely high.
Disclosure of Invention
An object of the utility model is to provide a structure is widened to entrance channel part that reduces wave height in the port to improve the stable condition of berthing of boats and ships in the port.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the utility model discloses a local structure of widening of entrance channel of reducing wave height in harbor, include to excavate the channel that is located the entrance channel side of surfing at harbor pool breakwater entrance, the plane shape of channel widening groove is parallelogram structure; the counterclockwise included angle between the long side a or c of the parallelogram and the axis of the harbor channel is a widened angle theta1(ii) a Two short sides b, b1 of the parallelogram, one of which isb1 is coincident with the edge of the wave-facing side of the entrance channel; the widening distance d of the channel widening groove is the vertical distance between a long side c of the parallelogram on the wave-facing side and the breakwater head of the harbor basin breakwater on the wave-facing side; length l of channel widening groove1Equal to the length of the long side of the parallelogram; width B of channel widening groove1Is the short side of the parallelogram and the widening angle theta1The product of the sine values of; channel widening groove depth h1Water depth h of the harboring channel; channel widening groove side slope gradient gamma1And = entering port channel side slope gradient γ.
The parameters of the channel widening groove are as follows:
wherein:
Hm0is the incident wave height; t ispIs the peak period of the incident wave; θ is the wave incident angle; Δ θ is the angular difference of θ and θ 1; g is the acceleration of gravity; s is time unit seconds; exp is an exponential function with a natural constant e as the base; l is the wavelength of the finite water depth wave; pi is a circumferential ratio;
when the angle is more than or equal to 20 DEG<Relative widening length l of channel widening groove at 26 degrees1the/L is selected to be 0.98;
when the angle is more than or equal to 26 DEG thetaThe relative widening length l of the channel widening groove is less than or equal to 60 degrees1Selecting the concentration of the catalyst at/L of 3.91-4.889;
when the angle is more than or equal to 20 DEG<Relative widening width B of channel widening groove at 26 degrees1Selecting 1.22-1.95 per liter;
when theta is more than or equal to 26 degrees and less than or equal to 36 degrees, the relative widening width B of the channel widening groove1Selecting 0.98-1.22 per liter;
when the angle is 36 degrees<When theta is less than or equal to 60 degrees, the relative widening width B of the channel widening groove1the/L is 0.24-0.73.
The utility model has the advantages of small investment, obvious effect, simple and convenient construction and maintenance and wide application range, and is particularly suitable for deep water channels, open sea normal wave direction and harbor channel included angles between 20o~60oThe port area can greatly reduce the wave height in the port, ensure the safety of ships entering and exiting and stopping the port, and increase the operation days of the port. And simultaneously, the utility model discloses can not cause destruction, the design application in the convenient actual engineering to the sea area environment.
Drawings
FIG. 1 is a schematic view of a local widened plane of the channel of the present invention; in the figure, the values in the boxes are the elevations of the area in meters.
Fig. 2 is an enlarged schematic view of a portion I of fig. 1.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1-2, the structure is widened to entrance channel part that reduces the interior wave height of harbor, include that the excavation locates to lie in the channel of 3 sides of surfing of entering the channel at breakwater 2 entrance of harbor pool 1 and opens up wide groove 4, the plane shape that the wide groove 4 was opened up to the channel is the parallelogram structure.
As shown in FIG. 2, the counterclockwise included angle between the long side a or c of the parallelogram and the entrance channel axis 5 is a widening angle theta1(ii) a The two short sides b, b1 of the parallelogram,one short edge b1 is coincident with the edge of the wave-facing side of the harboring channel 3; the widening distance d of the channel widening groove 4 is the vertical distance between the long side c of the parallelogram on the wave-facing side and the jetty head 6 of the harbor basin breakwater on the wave-facing side; length l of channel widening groove 41Equal to the length of the long side of the parallelogram; width B of channel widening slot 41Is the short side of the parallelogram and the widening angle theta1The product of the sine values of (a).
The parameters of the channel widening slot 4 are as follows:
according to the measured depth H of the channel, the slope gamma of the side slope of the channel and the height H of the incident wavem0Wave crest period T of incident wavepAnd determining various parameters of the excavated channel widening groove 4 according to the wave incident angle theta (namely the anticlockwise included angle between the wave direction of the waves and the axis 5 of the harboring channel). Now, the practical engineering is taken as an example for explanation:
in practical engineering, the wave incidence angle is knownθ=36oDepth of water in the channel 3h=20.87m (water level 1.87m, bottom elevation-19 m of the inbound channel 3), slope grade of the inbound channel 3γ=1:7, effective wave height of incident waveH m0=2m, peak period of incident waveT p=10 s. The determination of each size parameter of the broadening scheme is as follows:
1) first, calculate Delta according to equation (1)θ=20.08-20.34/(1+exp(36-27.953)/1.847)≈20oThen, the widening angle is calculated according to the formula (3)θ 1=36-19.8≈16o；
2) Calculating the widened distance from equation (4)d=60+60/(1+exp(36-32.99)/0.079)=60m；
3) Calculating the finite water depth wavelength L =123m by formula (5), and determining the relative widening widthB 1/L=0.98，l 1L =4.88, resulting in a widened widthB 1=120.5m, extended lengthl 1=600.2m。
4) Determining the depth h of the channel widening groove 41Water depth h =20.87m in the harboring channel; slope gradient gamma of channel widening groove 41And =1:7 for the slope γ of the side slope of the inbound channel.
The utility model discloses a channel widening groove 4 implements the back, has great reduction before the higher excavation of wave height in the port, and the wave height ratio minimum is about 0.4, and the wave height reduction of amplitude can reach 60 promptly.
The utility model discloses a design principle brief follows as follows:
when the wave and the channel contained angle of open sea are 20 ~60, in order to reduce the wave height in the harbor, improve the harbour and berth the steady condition, the utility model discloses rely on a parallelogram deep trouth of entrance channel excavation near breakwater entrance. By utilizing the water depth difference between the interior of the parallelogram widening groove and the exterior of the widening groove, when an external sea incoming wave is incident to the widening groove, the long sides and the short sides of the excavated widening groove generate refraction effects on the incident wave, so that the wave height at the port door of the harbor pool is redistributed, the wave at the breakwater port door is refracted to the exterior of the harbor, the wave height entering the harbor is greatly reduced, and the berthing condition of ships in the harbor is improved. In short, the essence of the local widening of the channel by using the parallelogram is that an auxiliary short channel is dug beside the entrance channel, and the refraction and shielding effect of the short channel is utilized to reduce the entrance wave energy.
Claims (2)
1. The utility model provides a structure is widened to entrance channel part that reduces interior wave height of port which characterized in that: the method comprises the steps of excavating a channel widening groove which is positioned at the wave-facing side of a channel entering a harbor at a breakwater entrance of a harbor pool, wherein the plane shape of the channel widening groove is of a parallelogram structure; the counterclockwise included angle between the long side a or c of the parallelogram and the axis of the harbor channel is a widened angle theta1(ii) a Two short sides b, b1 of the parallelogram, wherein one short side b1 is coincided with the channel edge at the wave-facing side of the harboring channel; the widening distance d of the channel widening groove is the vertical distance between a long side c of the parallelogram on the wave-facing side and the breakwater head of the harbor basin breakwater on the wave-facing side; length l of channel widening groove1Equal to the length of the long side of the parallelogram; width B of channel widening groove1Is the short side of the parallelogram and the widening angle theta1The product of the sine values of; channel widening groove depth h1Water depth h of the harboring channel; channel widening groove side slope gradient gamma1And = entering port channel side slope gradient γ.
2. The structure of locally widening a port entry channel for reducing harbor wave heights according to claim 1, wherein: the parameters of the channel widening groove are as follows:
，8s≤T p ≤15s equation 1;
equation 5;
wherein:
Hm0is the incident wave height; t ispIs the peak period of the incident wave; θ is the wave incident angle; Δ θ is the angular difference of θ and θ 1; g is the acceleration of gravity; s is time unit seconds; exp is an exponential function with a natural constant e as the base; l is the wavelength of the finite water depth wave; pi is a circumferential ratio;
when the angle is more than or equal to 20 DEG<Relative widening length l of channel widening groove at 26 degrees1the/L is selected to be 0.98;
when theta is more than or equal to 26 degrees and less than or equal to 60 degrees, the relative widening length l of the channel widening groove1Selecting the concentration of the catalyst at/L of 3.91-4.889;
when the angle is more than or equal to 20 DEG<Relative widening width B of channel widening groove at 26 degrees1Selecting 1.22-1.95 per liter;
when theta is more than or equal to 26 degrees and less than or equal to 36 degrees, the relative widening width B of the channel widening groove1the/L is selected from 0.98-1.22；
When the angle is 36 degrees<When theta is less than or equal to 60 degrees, the relative widening width B of the channel widening groove1the/L is 0.24-0.73.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920469496.5U CN210086156U (en) | 2019-04-09 | 2019-04-09 | Local structure of widening of channel of entering port of wave height in reduction port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920469496.5U CN210086156U (en) | 2019-04-09 | 2019-04-09 | Local structure of widening of channel of entering port of wave height in reduction port |
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| Publication Number | Publication Date |
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| CN210086156U true CN210086156U (en) | 2020-02-18 |
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| CN201920469496.5U Withdrawn - After Issue CN210086156U (en) | 2019-04-09 | 2019-04-09 | Local structure of widening of channel of entering port of wave height in reduction port |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109829263A (en) * | 2019-04-09 | 2019-05-31 | 黄河勘测规划设计研究院有限公司 | Reduce the navigation channel part Widening Design method of wave height in port |
-
2019
- 2019-04-09 CN CN201920469496.5U patent/CN210086156U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109829263A (en) * | 2019-04-09 | 2019-05-31 | 黄河勘测规划设计研究院有限公司 | Reduce the navigation channel part Widening Design method of wave height in port |
| CN109829263B (en) * | 2019-04-09 | 2024-04-12 | 黄河勘测规划设计研究院有限公司 | Channel local widening design method for reducing harbor internal wave height |
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Granted publication date: 20200218 Effective date of abandoning: 20240412 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200218 Effective date of abandoning: 20240412 |