JPH02178408A - Permeation type wave-killing dam - Google Patents

Abstract

PURPOSE:To prevent the stagnation of the organic matter, etc., and enable the usage of the ceiling part and the front part in other purpose by forming a wave-killing dam having the wave-killing holes, the cavity and the permeable holes and whose ceiling part is made flat and whose front wall is vertically formed. CONSTITUTION:Wave-killing blocks 3 having wave-killing holes 6 for magnifying/minifying the flow passage are piled in multiple steps on a permeable block 2 having permeable holes 8 to form the dam body 1 forming a vertical surface with the front wall 1a facing to the wave and forming the flat surface with the ceiling surface 1b. The cavity part 4 reinforced with a circular frame 11, in which ceiling an air port 10 is provided, is provided in the back of the dam body 1, that is the land side. The wave is killed by the wave-killing holes 6, the cavity 4 and the permeable holes 8 while it is permeated. Further, the stagnation of the organic matter is prevented by the flow generated by the permeation of the wave. The front wall 1a and the ceiling 1b can be used for a harbor or a promenade.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a permeable wave breakwater.

Prior Art Conventionally, on lakeshores and coasts, embankments made of concrete blocks having radial protrusions have been formed as revetment walls.However, the above-mentioned structure has poor water permeability. Because of bad
There was a problem in that organic matter that stagnated between the concrete blocks rotted and emitted a foul odor. Furthermore, since the outer surface of the embankment body is not flat, there is a problem in that the ceiling part and the front part facing the waves cannot be used for other purposes, such as a dock.

The present invention solves the above problems, and aims to provide a water-permeable breakwater that can prevent stagnation of organic matter and the like, and whose ceiling and front parts can be used for other purposes. .

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a cavity in the rear part on the land side in an embankment body forming a quay, and communicates with this cavity and connects the top part of the embankment body. a plurality of wave-dissipating holes that open in the front wall surface of the embankment facing the waves, communicate with the cavity, and whose flow paths expand and contract; and the cavity that faces the liquid-dissipating holes. The inner end wall of the embankment is curved downward, and a plurality of permeable holes are provided at the bottom of the embankment to communicate the cavity and the water area in front of the embankment.

Effect With the above-described configuration, waves flowing into the wave-dissipating hole are dissipated by narrowing the flow path when flowing in, expanding and contracting the flow path within the wave-dissipating hole, and narrowing the flow path when flowing into the cavity. The wave is further dissipated by spreading. The waves that have flowed into the cavity are guided to the bottom of the cavity along the downwardly curved inner wall, and are discharged to the outside of the embankment through the water permeable holes. During this time, the cavity is ventilated through the air vents, so the waves flow more quickly. The flow caused by the permeation of water from the waves prevents organic substances from stagnation. In addition, since wave dissipation is achieved through wave-dissipating holes, cavities, and permeable holes, the ceiling of the levee body should be formed flat so that it does not affect the wave action, and the front wall should be formed upright so that the levee body can be used as a dock. It becomes possible to use it for other purposes such as

Become.

EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In Figures 1 to 3, an embankment body 1 forming a quay is formed by stacking wave-dissipating blocks 3 in multiple stages on a permeable block 2, and the front wall surface 1a facing the waves forms an upright surface, and the ceiling The surface 1b is a flat surface. Further, a cavity 4 is provided at the rear of the embankment body 1, that is, on the land side. A wave-dissipating hole 6 that opens facing the waves 5 is formed in the wave-dissipating block 3 so as to penetrate in the axial direction, and the wave-dissipating hole 6 communicates with the cavity 4 . Further, the wave-dissipating hole 6 is configured such that the flow path can be expanded or contracted by a narrowed portion 7 formed in the middle. Further, a water permeable hole 8 is formed in the water permeable block 2 so as to penetrate in the axial direction and communicate the cavity 4 with the front side of the embankment body 1 .

The far end wall 9 of the cavity 4 facing the wave-dissipating hole 6 is formed to be curved downward, and the air port 1O provided in communication with the cavity 4 is connected to the ceiling of the embankment body 1. It's open.

Further, the back end wall 9 is reinforced by an arcuate frame 11, and a plurality of holes 12 are formed in the frame 11 for arranging electric wires and the like. A safety [13] is provided on the ceiling surface 1a of the embankment body 1, located at the water's edge.
A drainage ditch 14 is formed behind the safety fence 13.

Hereinafter, the effects of the above configuration will be explained.

Waves 5 flowing into the wave-dissipating hole 6 are dissipated by narrowing the flow path when flowing in, and expanding and contracting the flow path inside the wave-dissipating hole 6, and when flowing into the cavity 4, the flow path is narrowed. The waves are further dissipated by spreading. The waves 5 that have flowed into the cavity 4 are guided to the bottom of the cavity 4 along the surface of the back end wall 9 that curves downward, and are discharged to the outside of the embankment body 1 through the water permeable holes 8. be done. During this time, the cavity 4 is vented through the air port IO, so the waves 5
The flow becomes rapid. The flow generated by the permeation of the waves 5 prevents stagnation of organic matter and the like.

In addition, since wave dissipation is performed by the wave dissipation hole 6, the cavity 4, and the water permeation hole 8, the ceiling portion 1b of the embankment body 1, which does not affect the wave dissipation effect, is formed as a flat surface, and the front wall surface 1a is formed as an upright surface. As a result, the embankment body 1 can be used for other purposes such as a dock, a promenade, and a bicycle park.

Effects of the Invention As described above, according to the present invention, the wave-dissipating hole, the cavity, and the water-permeable hole allow water to pass through while dissipating waves.
It is possible to prevent the stagnation of organic matter due to the flow caused by the permeation of waves, and the ceiling of the dam body is formed as a flat surface, which does not affect the wave-dissipating effect, and the front wall surface is formed as an upright surface. can be used for other purposes such as a dock. 4,

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view showing one embodiment of the present invention, FIG. 2 is an overall perspective view, and FIG. 3 is an overall front view taken along the line A--A in FIG. 1. 1... Embankment body, 2... Permeable block, 3... Wave-dissipating block, 4... Cavity, 5... Waves, 6... Wave-dissipating hole, 7... Narrowing section, 8...Water hole, 9...Back end wall, lO...Air port.

Claims (1)

[Claims] 1. In the embankment body forming the quay, a cavity is provided in the rear part on the land side, and an air port is provided that communicates with this cavity and opens at the top of the embankment body, so that the front wall surface of the embankment body facing the waves is provided. A plurality of wave-dissipating holes are provided which are open to the cavity and communicate with the cavity, and whose flow paths expand and contract, and the inner end wall of the cavity facing the wave-dissipating holes is formed to curve downward. A permeable wave-dissipating levee, characterized in that a plurality of permeable holes are provided at the bottom of the body to communicate the hollow portion with a water area in front of the levee body.