JPH11107235A - Harbor facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water in the depth of a harbor from stagnating by arranging a water-penetration hole absorbing waves, a storage space converting waves to water streams, and a channel connecting the storage space and the depth side of the harbor at the front end of a breakwater to absorb waves of the open sea side. SOLUTION: Waves 12 surging from an ocean 2 to a land 1 collide with breakwaters 6A, 6B and disappear. Waves are also attenuated by conducting the breakwater 6A into a water-penetration hole 10 for absorbing waves. Waves 12 conducted through the water-penetration hole 10 are attenuated in the inside and converted into a water stream and further conducted to a storage space 9. Then, the water level of the storage space 9 is raised and as a difference is brought between the water levels of storage space and the depth side 13 of the harbor, a water stream 15 flowing from the storage space 9 to the depth side 13 of the harbor is generated in the channel 14. And hence, water in the outer ocean side than the harbor facilities 3 is conducted into the depth side 13 of the harbor. In this way, the outside water is conducted into the depth side 13 of the harbor and the stagnant flow in this part is prevented and water can be purified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a port facility.

[0002]

2. Description of the Related Art When a harbor is constructed, it is common practice to surround a water area for forming the harbor with a breakwater, and to form an opening at the end of the breakwater for navigating a ship. is there. Breakwaters are typically constructed of concrete dikes, Tetrapods (registered trademark), and the like.

[0003]

However, if a certain area of water is surrounded by a breakwater in this way, no matter how the opening is formed at the tip, the area is close to a closed area, and the water in the deep part of the port is There is a problem that stagnation is likely to occur.

[0004] Therefore, an object of the present invention is to solve such a problem and prevent the water in the inner part of the harbor from becoming stagnant, thereby purifying the water.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a water-dissipating water-permeable hole provided at the tip of a breakwater for forming a harbor and for breaking waves on the open sea side to convert it into a water flow. And a storage space for receiving and storing the water flow from the water-dissipating water-permeable hole, and a headrace for communicating the storage space with a portion on the back side of the port.

[0006] With such a configuration, since the breakwater penetrating hole is provided at the tip of the breakwater, waves hitting the tip of the breakwater are waved by being guided to the breakwater penetrating hole. The water flow generated by wave-dissipation in the wave-dissipating water-permeable holes flows into the storage space. Then, the water level in the storage space rises, and a difference is generated between the raised water level and the water level in the back part of the port, and a water flow is generated in the headrace from the storage space to the back part of the port. as a result,
External water is introduced into the deeper part of the port, preventing stagnation and purifying it.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes land, and 2 denotes the sea. Reference numeral 3 denotes a port facility based on the present invention, which is formed by a concrete retaining wall 4 so as to surround a certain water area 5. The retaining wall 4 forms a breakwater 6 in the sea, and an opening 7 for navigating a ship is formed at a tip of the breakwater 6. That is, in the sea, a pair of breakwaters 6A and 6B are arranged in a C shape in plan view.

At the tip of at least one breakwater 6A,
For example, as shown in the drawing, a circular wave-preventing body 8 in a plan view is similarly formed of concrete or the like. 2 is formed in a state in which it is cut off.

The wavebreaker 8 has a plurality of low-reflection wave-dissipating water-permeable holes 10 having one end opening toward the sea 2 and the other end opening toward the storage space 9 in a radial shape along the circumferential direction. Is formed. Each wave-dissipating water-permeable hole 10 is formed, for example, in a horizontal direction, and has therein a sudden-shrinking / expanding portion 11
Is formed, the waves 12 guided from the sea 2 side into the inside are extinguished, and the waves 12 can be converted into a water flow toward the storage space 9.

A headrace 14 for communicating the storage space 9 with the part 13 on the back side of the port is formed by a conduit buried in the soil.

In such a configuration, from the sea 2 to the land 1
The wave 11 heading toward is deprived of energy by colliding with the breakwaters 6A and 6B, and is wave-dissipated. In the breakwater 6A, the wave is also introduced by being introduced into the wave-dissipating water-permeable hole 10. In addition, when a breakwater 6B having the same degree as that of the breakwater 6A having the breakwater permeation hole 10 is required, a so-called tetrapod can be installed around the breakwater 6B.

The wave guided to the wave-dissipating water-permeable hole 10 is converted into a water flow by being wave-dissipated therein, and this water flow flows into the storage space 9. As a result, the water level of the storage space 9 rises, and a difference is generated between the raised water level and the water level of the portion 13 on the far side of the harbor. A water flow 15 toward 13 is generated. As a result, the water outside the harbor facility 3 is introduced into the portion 13 on the far side of the port, so that the occurrence of stagnation in the portion 13 is prevented, and the portion is purified.

[0013]

As described above, according to the present invention, the breakwater penetrating hole is provided at the tip of the breakwater, so that waves that collide with the tip of the breakwater can be effectively waved only by being guided to the wavebreak water hole. Instead, the water flow generated by the wave-dissipation through the wave-dissipating water flows into the storage space, and the water level is raised, so that the water flow from the storage space toward the far side of the harbor is channeled. Therefore, external water can be introduced into the part on the back side of the harbor, the occurrence of stagnation in that part can be prevented, and purification can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a port facility according to an embodiment of the present invention.

[Description of Signs] 6A Breakwater 9 Storage space 10 Wave-dissipating water-permeable hole 12 Wave 13 Deep part 14 Headrace

Claims (1)

[Claims] 1. A water-dissipating water-permeable hole provided at the tip of a breakwater for forming a harbor, for wave-dissipating waves on the open sea side and converting it into a water flow, and receiving and storing water from the water-dissipating water-permeable hole. A harbor facility, comprising: a storage space for storing water; and a headrace that communicates the storage space with a portion on the back side of the port.