JPS60203714A - Reservoir type block and revetment levee using block for oceanic life to live - Google Patents

Abstract

PURPOSE:To prevent the front face of a levee body from being scoured and to enable the oceanic life to live, by providing wave-breaking plates integrated with bottom plates and by providing cut-off frames storing water without letting some seawater run out when it dashes against the open portions of the bottom plates. CONSTITUTION:Waves dashing against wave-breaking plates 2 from the sea are broken, and some amount of seawater is stored in temporary reservoir portions 11 formed by side walls 4 and wave-breaking plate 2. Remaining seawater dashing against the wave-breaking plates 2 of upper blocks is broken and some amount of water is stored in the reservoir portions 11 and as it comes to upper blocks in succession, the quantity of energy is reduced and the wave energy is attenuated. When the tide retreats, the seawater stored in the reservoir portions 11 is interrupted by the water-breaking plates 2 and comes to lower reservoir portions 11 through drainage ditches formed by drainage-formed portions 3 and is dropped into lower and lower drainage ditches. Therefore, the seawater in a reservoir portion 6 is interrupted by a cut-off frame 5 to form the seawater pool, and so the oceanic life can live there.

Description

[Detailed Description of the Invention] The present invention uses a saw concrete block to temporarily store seawater that washes up on the coast, and to provide a shallow water-stopping frame to a water-storage block that prevents free passage of seawater when the waves recede. By constructing a seawall to attenuate wave energy and bring the flow of reflected waves closer to a steady flow, it is possible to prevent scouring and sucking out of the front of the levee body, and even at low tide, some seawater remains and the coast is This invention relates to a water storage type block for constructing a permanent seawall suitable for the habitat of living creatures, and a seawall for the habitat of coastal fossils using the same.

There have been many accidents in which seawalls, which have traditionally been built along sandy beaches to prevent coastal erosion, are damaged.

This is due to the scour of the front surface of the embankment foundation due to the reflected waves, and the strong reflected waves flowing down the concrete surface of the embankment in the form of a jet flow, creating small gaps in the embankment body, cracks, and dirt. It is empirically known that this is due to the so-called suction phenomenon, which sucks out the interstitial water within the embankment.

The present inventor believes that conventional seawalls are all made of strong concrete, but they do not have strong walls to deal with the waves that hit the coast with a large amount of energy, and instead attenuate the wave energy, especially the reflected waves. Focusing on the fact that a seawall that approaches a steady flow, weakens the energy of the front side of the levee body JAIi, and allows free flow of pore water on the back side of the levee body, is ultimately stronger, 109
No. 329, qM' patent application No. 150960, patent application No. 58-150960.
In No. 9-21963 and Japanese Patent Application No. 59-21964, seawater that is washed up by waves is temporarily pooled,
It was proposed to cover the embankment body with a number of concrete slabs with breakers that would slowly release between waves.

However, on natural coasts, especially rocky areas, there is a lot of pressure.
? There is a deep area where some seawater remains even during LF, and this area is home to coastal organisms such as shellfish and seaweed, and also serves as a hiding place for small fish. Even with the sea wall proposed by the inventor,
After securing the bank protection effect and the scouring prevention effect in front of the embankment body,
The present invention was completed by researching a seawall that resembles a natural rocky area as much as possible and is suitable for habitat of coastal organisms and does not retain seawater even at low tide.

That is, the present invention provides a water storage type block that stores a portion of the seawater that has washed up on the seawater without letting it flow out until the next high tide by providing a shallow water stop frame on a concrete block that has a breaking wave board and a drainage channel that make up the seawall. The present invention also provides a park-like element that can be enjoyed on the seawall during low tide.

The block according to the present invention is a concrete block in which a strong bottom, a wave breaking plate, and a water stop frame are integrally cast. The bottom plate has a rectangular flat plate shape so that it can be stably placed on a slope and in close contact with each other. The wave breaking plate is strong enough to withstand wave energy, and the missing part will be used as a drainage channel. When the waves recede, the wave-breaking plate prevents the free passage of seawater and allows it to flow down through only the drainage channel, and it is preferable to install it at one end of the bottom plate in terms of the stability of the block itself. The drainage channel forming part should have a width of at least 70 mm, preferably 100 mm to 2 mm, so that there is no risk of it being blocked by organisms such as shellfish and seaweeds.
00m'm', or more in some cases. Furthermore, in order to improve the water storage effect and obtain a sturdy concrete block, the side wall may be provided integrally with the wave breaking plate and the bottom plate, leaving a drainage channel.

When the slope is covered with the blocks of the present invention, the water stop frame is shallowly installed at the fl1 position where water flows down from the open part of the end of the bottom plate where no wall is installed, and the height of the LL water stop is l; i This is the depth of the water storage area for the habitat of marine organisms.

In addition, in the case of a stepped seawall, it has a strong bottom plate, a 1&wall, a front wall, and a city water frame built integrally with the bottom plate. A part of the front wall is required to be missing from the bottom plate surface, and when this missing part forms a seawall, it becomes a reflected wave υ1 water r1a. There is no particular limitation on the position of Y41 where the drainage channel is installed, but one end of the front surface of the bottom plate is convenient for manufacturing. Drainage channels must be wide enough to avoid blockage or narrowing due to the proliferation of shellfish, seaweed, etc. The front wall is the part that faces waves from the ocean and suppresses the temporary jet flow of reflected waves, and prevents the free passage of seawater when the waves recede.

The rear wall is installed perpendicularly from the entire length of the rear end of the bottom plate, and is designed to withstand the impact from the back. Furthermore, it increases the water storage effect,
In order to obtain a sturdy concrete block, the side walls may be integrated with the wave breaking plate and the bottom plate.

The water stop frame is shallowly installed in the open area at the end of the bottom plate where no wall is installed, and it shallowly blocks the area where water flows down from the bottom. This is the depth of the water storage area.

When such blocks are arranged, a drainage channel having the same width as the drainage channel forming portion of the block is formed. The waves coming from JJ and others consume energy as they pass over the wave-breaking plates one after another from below, reducing the amount of seawater, and when they are pulled back, they are blocked by the wave-breaking plates and flow down one after another through a narrow drainage channel. Therefore, combined with the wave breaking caused by the wave breaking plate, the energy of the reflected waves is significantly attenuated, resulting in a gentle flow similar to a steady current.
Before the next wave approaches 1-I, some of the stored seawater can flow away and prepare for the next wave. By storing seawater for 191i, it is possible to provide a habitat for coastal organisms.

Hereinafter, the present invention will be described in detail by way of examples with reference to the drawings.

FIG. 1 is a perspective view of a water storage type block, FIG. 3 is a layout diagram of a sea wall using this block as seen at right angles to the slope, and FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3. 1 is a bottom plate, 2 is a wave breaking plate planted on the bottom plate I leaving the drainage channel forming part 3, and 4 is a wave breaking plate 2.
This is a side wall provided at the end opposite to the drainage channel forming hole 193. Reference numeral 5 denotes a water stop frame which is much lower than the side wall 4, and is installed in the open part of the wave breaking plate 2 on the opposite side to the side wall 4. As shown in Fig. 4, when the slope is tilted to cover the slope, the waves of seawater are 1.
The II exit is a part with a water stop frame, and by blocking it, seawater is stored. G is the seawater storage gl.

Reference numeral 7 denotes a wave-breaking plate mounting portion provided at a portion of the bottom plate 1 that faces the wave-breaking plate 2; be placed on top. 9
is the sidewalk forming part carved near the wave-breaking plate placement part (=J) of the bottom plate I.

During construction, as shown in Figures 3 and 4, by arranging the revetment blocks vertically and horizontally in close contact with each other, the wave-breaking plate mounting portions 7 of the bottom plate 1 are placed on the four parts formed at the bottom of the wave-breaking plate.
is inserted. The waterway forming portion 3 remains as it is as a missing portion of the wave breaking plate, and becomes a drainage channel IO. The number 12 is the law, and the number 13 is the king of roots. In Figure 1, the upper surface of the wave-breaking plate 2 and the side wall 4 are shown.
Although the two sides and the sidewalk forming part 9 are slopes, they are almost horizontal in the constructed state and can be walked on with great safety at low tide. In addition, seawater remains in the water storage part 6, providing a habitat for l) η products, and making it possible to perform CM activities as well.

llσ Waves crashing from the ocean crash into the wave breaking plate 2 and break it, and a part of the seawater is stored in the temporary water storage part 11 formed by the side wall 4 and the wave breaking plate 2, and the remaining seawater is further stored in the upper stage. It crashes into the wave breaking plate of the block and breaks, and a part of it is stored, and as a result, the number of seawater rods that go up to the upper level is significantly reduced, and the wave energy is also attenuated. When the waves recede (sometimes the seawater stored in the temporary water storage section 11 is blocked by the wave breaking plate 2, it passes through the drainage channel 10 which is the narrow part and flows into the temporary water storage section 1 at the lower level).
1, and further flows down the lower drainage channel 10. In this way, the reflected waves cannot flow down all at once, so they are attenuated and become close to a steady flow, which prevents scouring of the front surface of the embankment body and also prevents suction from the back surface of the embankment body.

When the tide is low, the temporary water storage part 11 becomes empty, but the seawater in the water storage part 6 is dammed up by the water stop frame 5 and forms a pool of seawater. Therefore, various l;σ-producing organisms can live in the water storage portion 6 and the wall surface surrounding it.

In history, by installing the sidewalk forming part 9, it is possible to walk inside the seawall at low tide, and water storage parts called ``I'-'' are created one after another.

FIG. 2 is a perspective view of another embodiment of the water storage block. A protrusion whose upper surface is substantially the same as the slope of the side wall 4 is provided on the side wall 1 as a sidewalk forming part 9.

FIG. 5 shows another embodiment of the water storage type block in which the side walls 4 are not joined together. (Since it does not have a JIIJ wall, water stop frames were installed at both ends of the wave breaking plate 2.

Figure 6 shows a box-shaped water storage block. A wave-breaking plate 16 having a missing part serving as a drainage channel is installed at one end of the bottom plate 1, and a side wall 1 is installed at the end of the bottom plate 1 adjacent to the wave-breaking plate 16.
4, and a rear wall 15 was installed at the end adjacent to the side wall 14. In the open part of the bottom plate I where these walls are not installed, a water stop frame 5, which is much shorter than the walls, is installed.
Ta. Therefore, the bottom plate 1 is surrounded on all sides, and seawater is stored up to the height of the water stop frame 5 at low tide.

FIG. 7 shows another embodiment of the box-shaped water storage cock.

In this embodiment, side walls 14 are not provided. therefore,
Although it is not visible in the drawing, a water stop frame 5 is also provided at the open end where the side wall 14 in Fig. 6 is provided! J) The water stop frame 5 is 2 of the bottom plate 1.
It is divided into parts. , 17 is a platform, which can be used when a seawall is constructed using the blocks of this embodiment, when one wants to walk from a lower block to an upper block, or vice versa.

FIG. 8 is a perspective view of a seawall constructed using the water storage blocks shown in FIG. 7. When subjected to waves, the wave breaking plate 16 and the temporary water storage part 11 attenuate the wave energy, and the undertow is blocked by the wave breaking plate 16 and flows out of the drainage channel 10, approaching a steady flow and causing scouring in front of the dam body foundation. Prevented. but,
The seawater remaining in the water storage part 6 in the water stop frame 5 cannot flow out, and seawater remains in this part even at low tide, making it a habitat for coastal creatures. Furthermore, since the platform 17 is provided, it is possible to walk safely inside the sea wall at low tide.

As described above, the present invention allows seawater to remain shallow even at low tide,
In addition to being suitable for habitat for coastal organisms, the seawater m and 3 energy of waves rising up the levee body is fIIM, and not only is the energy of reflected waves small, but the flow is close to a steady flow, and the front surface of the levee body is A permanent sea wall can be obtained without the risk of being scoured.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1, 2, 5, 6, and 7 are perspective views of a water storage type block, and FIG. 3 is a water storage block viewed from a vertical direction on a slope. Layout diagram of expression block,
FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3, and FIG. 8 is a sectional view of another embodiment of the sea wall. In the drawing, 1 is the bottom plate, 2.16 is the wave breaking plate, 4.14 is the ocean side end,
5 is a water stop frame, 6 is a water storage part, 7 is a breaking wave board mounting part, 8 is a protrusion part, 9 is a sidewalk formation part, 10 is a drainage channel, 11 is a temporary water storage part, 12 is a slope, 13 is a root Hardening work, 15 is the rear wall, 17th platform. Patent Applicant Nippon Sohan Co., Ltd. Agent Patent Attorney Sadako Suzuki Figure 1, figure 2, horse 3, ``■ Straight - ■ also figure 4 Δ

Claims (2)

[Claims] (1) A concrete block having a bottom plate or a bottom plate and a rear wall that can cover the entire slope of a slope-like or stepped seawall, and when the waves recede, the concrete block is exposed to sea water. A wave-breaking plate is installed integrally with the bottom plate to prevent the free passage of water, and a water-stop frame is installed in at least a part of the open part of the bottom plate to store some of the seawater that washes over the sea without letting it flow out. A water storage type block characterized by: (2) A concrete block having a bottom plate or a bottom plate and an f&wall that can cover the entire slope of a slope-like or stepped seawall, and when the waves recede, the concrete block is exposed to sea water. A wave-breaking plate is installed integrally with the bottom plate to prevent the free passage of water, and a water-stop frame is installed in at least a part of the open part of the bottom plate to store some of the seawater that washes over the sea without letting it flow out. Water storage type blocks characterized by the above are arranged with the wave-breaking plates facing the ocean side, with the remaining drainage channels between the wave-breaking plates, and the bottom plate or the bottom plate and the rear wall are arranged in a slope-like or step-like manner. A seawall that covers the whole area and is a habitat for coastal creatures.