JP2008248570A - Coastal structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coastal structure which can prevent the invasion of jerry fish etc. even if mechanically-operating facilities are not installed, and which dispenses with the disposal of the jerry fish etc. <P>SOLUTION: In revetment 3, an intake 4 and an outlet 5 are constructed, and an opening area of the intake 4 is smaller than that of the outlet 5. In a land section 22, a water circulating channel 12 and an intake channel 8 are constructed. The water circulating channel 12 leads to the outlet 5 from the intake 4 in the land section 22. The intake 4 communicates with a midway portion of the water circulating channel 12. An inflow port 81 of the intake channel 8 is covered with a protective net 10 which is provided in an inclined state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coastal structure provided in a coastal region, and more particularly to a coastal structure including a water intake for taking water from a water area such as a sea or a lake to a plant such as a power plant or a refinery.

Conventionally, a power plant has a water intake for taking in seawater. In order to prevent jellyfish floating in the sea from entering the water intake, a rotary screen is installed in front of the water intake and the jellyfish is captured by the rotary screen (for example, see Patent Document 1). In addition, a propeller jet and a protective net are installed in front of the water intake, and a jellyfish is guided to a predetermined location by a water flow generated by the propeller jet (for example, see Patent Document 2).
JP 2000-733336 A JP 2001-140245 A

However, in order to operate the rotary screen and the propeller injector normally, there is a problem that maintenance is necessary. In addition, jellyfish trapped on the rotary screen and jellyfish induced by a propeller jet have to be discarded and disposed of, and disposal and disposal of jellyfish is also a problem from the viewpoint of cost and nature protection.
Accordingly, an object of the present invention is to provide a coastal structure that can prevent the invasion of jellyfish and the like without installing mechanically operating equipment, and that does not require disposal of the jellyfish or the like.

  In order to solve the above-described problems, the invention according to claim 1 is provided in a coastal structure, provided on the land side of the coastal portion with a water intake provided in the coastal region, a discharge port provided in the coastal region. It is characterized by comprising a irrigation channel from the intake channel to the discharge port, and an intake channel that leads to a midway portion of the irrigation channel from the intake port to the discharge port.

  The invention according to claim 2 is the coastal structure according to claim 1, characterized in that the opening area of the outlet is smaller than the opening area of the intake.

  The invention according to claim 3 is the coastal structure according to claim 1 or 2, characterized in that the cross-sectional area of the diversion channel gradually decreases from the intake port toward the intake channel.

  The invention according to claim 4 is the coastal structure according to any one of claims 1 to 3, characterized in that the intake channel is a culvert buried in the ground of the land portion.

  The invention according to claim 5 is the coastal structure according to any one of claims 1 to 4, wherein the circulation channel is an inflow channel from the intake to the portion that leads to the intake channel, and the intake channel And a diversion channel from the portion leading to the diversion channel, and an inlet of the intake channel communicating with the diversion channel is provided below the diversion channel.

  The invention according to claim 6 is the coastal structure according to any one of claims 1 to 5, further comprising a net covering the inlet of the intake channel.

  The invention according to claim 7 is the coastal structure according to claim 6, characterized in that the net member is installed so as to incline and incline.

  The invention according to claim 8 is the coastal structure according to any one of claims 1 to 5, characterized in that an inlet of the intake channel leading to the irrigation channel opens at a bottom surface of the irrigation channel. To do.

  The invention according to claim 9 is the coastal structure according to claim 8, further comprising a net covering the inlet of the intake channel communicating with the diversion channel.

  The invention according to claim 10 is characterized in that, in the coastal structure according to claim 9, the net member is installed horizontally.

  The invention according to claim 11 is the coastal structure according to claim 6 or 7, further comprising an air discharge portion that is provided on the bottom surface of the diversion channel on the intake side of the net material and discharges air. It is characterized by.

  The invention according to claim 12 is the coastal structure according to claim 5, further comprising an air discharge portion that is provided on the bottom surface of the diversion channel on the intake side of the intake channel than the intake port of the intake channel and discharges air. It is characterized by that.

  A thirteenth aspect of the present invention is the coastal structure according to the sixth, seventh, ninth, tenth, or eleventh aspect, further comprising an air discharge portion that is provided below the net member and discharges air. .

  According to the invention which concerns on Claim 1, the water flow which goes to a water intake channel through a water intake from the water area outside a coastal part generate | occur | produces by taking in water to plants, such as a power plant and a refinery. The water that has flowed into the diversion channel by such a water flow does not flow only into the intake channel, but is discharged to the water area from the outlet through the diversion channel. For this reason, floating substances such as jellyfish are also returned to the water area through the circulation channel, so there is no need to dispose of the floating substances. In addition, since the floating material is returned to the water area around the circulation channel, the floating material can be prevented from flowing into the intake channel. In addition, it is not necessary to install mechanical equipment such as a rotary screen or a propeller sprayer, and maintenance and running costs can be greatly reduced.

  According to the invention according to claim 2, since the opening area of the outlet is smaller than the opening area of the intake, there is a head difference in energy due to the invasion of waves from the water area, and the water flowing into the circulation channel from the intake is It flows to the outlet. As a result, suspended matter such as jellyfish is also returned to the water area, so there is no need to dispose of the suspended matter, and the flow of suspended matter into the intake channel can be suppressed, and maintenance and running costs are greatly reduced. be able to.

  According to the invention which concerns on Claim 3, the flow area of the water which flows into a diversion channel can be made quick because the cross-sectional area of a diversion channel reduces gradually toward an intake channel from a water intake.

  According to the invention which concerns on Claim 5, since the inflow port of the intake channel is provided under the diversion channel, the water flowing through the shallow portion flowing into the intake port flows into the diversion channel and flows through the deep portion. Water flows into the intake channel through the inlet. For this reason, suspended matter floating in water is difficult to flow into the intake channel and easily into the diversion channel. Therefore, suspended matter such as jellyfish is returned to the water area.

  According to the invention which concerns on Claim 6, since the inflow port of the intake channel is covered with the net | network material, although water flows into an intake channel, the penetration | invasion of the floating substance to an intake channel can be stopped.

  According to the invention which concerns on Claim 7, since the net | network material is installed so that it may climb and incline toward the diversion channel above an inflow port, the suspended | floating matter which did not flow into the intake channel by the net | network material goes to a diversion channel. Be guided. Therefore, clogging of the net material due to suspended matter is suppressed, and the net material can be used for a long time.

  According to the invention which concerns on Claim 8, since the intake channel leads to the bottom face of the circulation channel, the floating substance in the water which flowed into the intake port does not flow easily into the intake channel. Therefore, suspended matter is also returned to the outside water area.

  According to the ninth aspect of the present invention, since the inlet of the intake channel is covered with the netting material, water flows into the intake channel, but it is possible to prevent the floating material from entering the intake channel.

  According to the eleventh aspect of the present invention, since the air discharge portion is provided on the bottom surface of the diversion channel on the water intake side of the net material, the suspended matter is captured by the net by the rising of the air discharged from the air discharge portion. Can be prevented.

  According to the twelfth aspect of the present invention, since the air discharge portion is provided on the bottom surface of the circulation channel at the intake port side of the intake port, the floating material floats by the air discharged from the air discharge portion. It becomes easy to flow into the diversion channel.

  According to the thirteenth aspect of the present invention, when air is released from the air discharge portion provided below the mesh material, it is possible to prevent trapping of floating substances in the net body above the air discharge portion. Can do.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

<First Embodiment>
FIG. 1 is a perspective view showing a coastal structure 1 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG.

  As shown in FIG. 1 and FIG. 2, the caisson 2 as a revetment structure is constructed so as to be submerged in the bottom of the water and vertically arranged along the coast, and the revetment 3 by the caisson 2 is constructed. The coast where the caisson 2 is installed may be any coast of the sea, river and lake.

  A water intake 4 and a discharge port 5 are constructed on the revetment 3, and the discharge port 5 penetrates the caisson 2 from the water area 21 to the land part 22, and the discharge port 5 penetrates the caisson 2 from the land part 22 to the water area 21. . The intake port 4 is constructed so that the upper end of the intake port 4 is below the envy average low tide surface of the water area 21. The upper end of the outlet 5 is above the envy average low tide, and the lower end of the outlet 5 is below the envy average low tide. And the water intake 4 and the water discharge port 5 are constructed so that the lower end of the water discharge port 5 is located deeper than the lower end of the water intake port 4.

  In the land portion 22, the irrigation channel 12 and the intake channel 8 are constructed. The circulation channel 12 extends from the intake 4 to the outlet 5 in the land portion 22. The circulation channel 12 is curved in a bow shape when viewed from above. The diversion channel 12 is provided in a groove shape, and the diversion channel 12 is covered with a grating, a floor slab, or the like.

  An inlet 81 of the intake channel 8 is provided in the middle part of the circulation channel 12 from the intake port 4 to the discharge port 5, and the intake channel 8 leads to a middle part of the circulation channel 12. Here, the diversion channel 12 is divided into an introduction channel 6 that is an area from the intake 4 to the inlet 81 of the intake channel 8 and a diversion channel 7 that is an area from the inlet 81 to the outlet 5.

  The height of the walls on both sides of the diversion channel 7 and the introduction channel 6 is higher than the envy average high tide level. In addition, the bottom surface of the diversion channel 7 and the bottom surface of the introduction channel 6 are both lower than the envy average low tide surface, the bottom surface of the diversion channel 7 is higher than the bottom surface of the introduction channel 6, and the depth of the introduction channel 6. Is deeper than the diversion channel 7 depth. In this way, the bottom of the diversion channel 12 is formed in two stages by the bottom surface of the introduction channel 6 and the bottom surface of the diversion channel 7.

  The width of the introduction channel 6 gradually decreases from the intake port 4 toward the inflow port 81 of the intake channel 8, whereby the cross-sectional area of the introduction channel 6 also gradually decreases from the intake port 4 toward the inflow port 81 of the intake channel 8. Yes. The bottom surface of the water diversion channel 7 may gradually increase from the introduction water channel 6 side toward the discharge port 5 side, or may gradually decrease from the introduction water channel 6 side toward the discharge port 5 side. The height may be uniform from the introduction water channel 6 side to the discharge port 5 side.

  The intake channel 8 is a box culvert embedded in the ground of the land portion 22, and the intake channel 8 is installed below the diversion channel 7. The inflow port 81 of the intake channel 8 opens in the middle of the circulation channel 12 below the diversion channel 7, and the inflow channel 81 is opposed to the intake port 4 with the introduction channel 6 between the intake channel 4. In place. The other end of the intake channel 8 on the side opposite to the inflow port 81 leads to a power plant, a refinery, and other plants. Further, the shaft 9 is excavated in the land portion 22, the shaft 9 passes through the midway of the intake channel 8, the air in the intake channel 8 is discharged from the shaft 9 to the ground, and the air is entrained in the water sent from the plant. To prevent. In addition, the cross-sectional area of the intake channel 8 is determined by the amount of water required for plant operation.

  The inlet 81 of the intake channel 8 leading to the introduction channel 6 is covered with the protective net 10 and is provided in a state where the protective net 10 is stretched. This protective net 10 is installed so as to incline toward the upper diversion channel 7. That is, the protective net 10 is inclined so as to move away from the water intake 4 and approach the water diversion channel 7 from the bottom to the top.

  A plurality of air discharge pipes 11 are installed in the width direction of the introduction water channel 6 on the side of the water intake 4 from the inlet 81 of the intake water 8 and on the bottom surface of the introduction water channel 6. Among these air discharge pipes 11, there are those arranged on the intake 4 side of the protective net 10 and those arranged on the intake path 8 side of the protective net 10 and below the protective net 10. A plurality of air discharge holes are formed in the air discharge pipe 11, and when compressed air is sent to these air discharge pipes 11 by a compressor (not shown), bubbles are released from the air discharge holes of the air discharge pipe 11. The air discharged from the air discharge pipe 11 disposed below the protective net 10 rises and passes through the protective net 10.

  In the coastal structure 1 constructed as described above, when water is taken in by a power plant, refinery, or other plant, a water flow from the water area 21 to the intake channel 8 through the intake 4 and the introduction channel 6 is generated. To do. The water flowing into the introduction water channel 6 by such a water flow flows into the diversion channel 7 as well as the intake channel 8. The water flowing into the diversion channel 7 is discharged from the discharge port 5 to the water area 21 through the diversion channel 7. On the other hand, the water that has flowed into the intake channel 8 flows to a power plant, a refinery, and other plants. Thus, the water flow flowing into the diversion channel 7 can be generated using the water flow flowing into the intake channel 8.

  Not only the water flow that flows into the intake channel 8, but also the water flow that flows into the diversion channel 7 is generated by waves in the water area 21. That is, since the opening area of the discharge port 5 is smaller than the opening area of the intake port 4, there is a water head difference in energy due to the wave intrusion from the water area 21, and the water that has flowed into the diversion channel 7 from the intake port 4. It flows to.

  Floating matter (for example, jellyfish) that has entered the water intake 4 by the water flow is pushed up by the air bubbles released from the air discharge pipe 11 toward the water surface and flows into the diversion channel 7. In particular, since the protective net 10 is inclined, the suspended matter is guided to the diversion channel 6 by the protective net 10. The suspended matter flowing into the diversion channel 7 is discharged from the outlet 5 to the water area 21.

  In addition, the floating substance that has tried to flow into the intake channel 8 is captured by the protective mesh 10 and does not flow into the intake channel 8, and bubbles released from the air discharge pipe 11 below the protective mesh 10 rise to the protective network. By passing through 10, the suspended matter captured by the protective net 10 rises along with the bubbles.

  As described above, according to the present embodiment, since the water is branched into the diversion channel 7 and the intake channel 8 from the introduction channel 6, the water flow flowing from the introduction channel 6 into the diversion channel 7 using the water flow toward the intake channel 8. Also occurs. And since the diversion channel 7 is connected to the water area 21 through the discharge port 5, floating substances such as jellyfish can be returned to the water area 21 together with the water flowing into the diversion path 7. Furthermore, since the opening area of the discharge port 5 is smaller than the opening area of the intake port 4, the flow rate of the wave flowing from the introduction water channel 6 to the water diversion channel 7 can be further increased by utilizing wave energy, and the suspended matter can be surely secured. It can be returned to the water area 21. Since the cross-sectional area of the introduction channel 6 gradually decreases from the intake port 4 toward the inflow port 81 of the intake channel 8, the flow velocity flowing into the diversion channel 7 and the intake channel 8 by the wave increases.

  In addition, it is not necessary to use special equipment such as a jet jet apparatus for preventing suspended matter from entering the intake channel 8, and maintenance and running costs can be greatly reduced. Moreover, since the floating substance which entered the water intake 4 is returned to the water area 21 as it is, it is not necessary to treat and dispose of the floating substance, the maintenance cost can be reduced, and if the floating substance is a living thing, it leads to nature conservation. .

  In addition, the suspended matter is not easily captured by the protective net 10 due to the inclination of the protective net 10, and easily flows into the diversion channel 7. Furthermore, air bubbles released from the air release pipe 11 make it difficult for the suspended matter to be captured by the protective mesh, and clogging of the protective mesh 10 can be prevented. Further, even if the suspended matter is captured by the protective mesh 10, the captured suspended matter is removed from the protective mesh 10 by the bubbles released from the air release pipe 11 installed below the protective mesh 10. Therefore, the protective net 10 can be used for a long time.

<Second Embodiment>
The coastal structure 101 in 2nd Embodiment is demonstrated using FIG. 3, FIG. FIG. 3 is a perspective view showing the coastal structure 101, and FIG. 4 is a cross-sectional view taken along the line IV-IV shown in FIG. In addition, the same code | symbol is attached | subjected about the component of the coastal structure 1 shown by FIG. 1, FIG. 2 and the component of the coastal structure 101 corresponding to it.

  In the coastal structure 1 shown in FIGS. 1 and 2, the inflow port 81 of the intake channel 8 opens at a position opposite to the intake port 4 below the diversion channel 7, and further, the bottom of the circulation channel 12 is introduced. The bottom surface of the water channel 6 and the bottom surface of the water diversion channel 7 are constructed in two steps. On the other hand, the coastal structure 101 shown in FIGS. 3 and 4 is different from the coastal structure 101 and the coastal structure 1 in the following points.

  That is, in the coastal structure 101 of FIGS. 3 and 4, the inflow port 81 of the intake channel 8 opens at the bottom surface of the diversion channel 12, and the protective net 10 covering the inflow port 81 is horizontal at the bottom surface of the diversion channel 12. Is installed. Specifically, the inflow port 81 is provided at the boundary between the bottom surface of the introduction water channel 6 and the bottom surface of the water diversion channel 7. Further, the bottom surface of the water diversion channel 7 is an upward slope from the inlet 81 side to the outlet 5. The depth of the diversion channel 7 at the end on the inflow port 81 side is equal to the depth of the bottom surface of the introduction water channel 6 at the end on the inflow port 81 side.

  The plurality of air discharge pipes 11 are provided below the inflow port 81 in the intake channel 8. That is, since the plurality of air discharge pipes 11 are provided below the protection net 10, the air discharged from the air discharge pipe 11 rises and passes through the protection net 10. Therefore, the suspended matter is not easily captured by the protective mesh 10 and the suspended matter captured by the protective mesh 10 is also removed. Therefore, clogging of the protective net 10 can be prevented.

  Except as described above, portions corresponding to each other between the coastal structure 101 shown in FIGS. 3 and 4 and the coastal structure 1 shown in FIGS. 1 and 2 are similarly provided. It has been.

  The present invention is not limited to the above-described embodiment, and various improvements and design changes may be made to the above-described embodiment without departing from the spirit of the present invention.

It is the perspective view which showed the coastal structure in 1st embodiment of this invention. It is sectional drawing which showed the longitudinal cross-section of the said coastal structure. It is the perspective view which showed the coastal structure in 2nd embodiment of this invention. It is sectional drawing which showed the longitudinal cross-section of the coastal structure in 2nd embodiment.

Explanation of symbols

1 Coastal structures
3 Quay
4 water intake
5 Outlet
6 Introductory waterway
7 waterway
8 Intake channel
10 Protective net
11 Air release pipe
12 times waterway
21 Water
22 Land
81 Inlet

Claims (13)

A water intake in the coastal area;
An outlet provided in the coastal area;
A circulation channel that is provided on the land side of the coastal part and extends from the intake channel to the discharge port;
A coastal structure comprising: a water intake channel that leads to a midway portion of the water circulation channel from the water intake port to the discharge port.   The coastal structure according to claim 1, wherein an opening area of the outlet is smaller than an opening area of the intake.   The coastal structure according to claim 1 or 2, wherein a cross-sectional area of the irrigation channel gradually decreases from the intake port toward the intake channel.   The coastal structure according to any one of claims 1 to 3, wherein the intake channel is a culvert buried in the land. The inflow water channel from the intake port to the portion that leads to the intake channel, and the diversion channel from the portion that leads to the intake channel to the discharge channel,
The coastal structure according to any one of claims 1 to 4, wherein an inlet of the intake channel communicating with the diversion channel is provided below the diversion channel.   The coastal structure according to any one of claims 1 to 5, further comprising a net covering the inlet of the intake channel.   The coastal structure according to claim 6, wherein the net member is installed so as to incline and tilt.   The coastal structure according to any one of claims 1 to 5, wherein an inlet of the intake channel communicating with the irrigation channel opens at a bottom surface of the irrigation channel.   The coastal structure according to claim 8, further comprising a net member that covers an inlet of the intake channel that leads to the irrigation channel.   The coastal structure according to claim 9, wherein the net member is installed horizontally.   The coastal structure according to claim 6 or 7, further comprising an air discharge portion that is provided on a bottom surface of the diversion channel on the intake side of the net material and discharges air.   The coastal structure according to claim 5, further comprising an air discharge portion that is provided on a bottom surface of the diversion channel on the intake port side of the intake port with respect to the intake port and discharges air.   The coastal structure according to claim 6, 7, 9, 10 or 11, further comprising an air discharge portion which is provided below the mesh member and discharges air.

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