JPS6375211A - Wave absorption wave dissipation block - Google Patents

Abstract

PURPOSE:To obtain dam blocks ensuring the fluidity of water by a method in which a pipe is buried in the block and the sleeve of the end portion is processed into a smaller diameter. CONSTITUTION:A metal pipe 3 is buried in a block 2 that is stacked up to construct a dam. The pipe 3 has a sleeved portion 8 with a diameter portion 11 and a connecting portion 12 on its offshore end. The fluidity of water can thus be ensured and the occurrence of the splash of waves can be prevented.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a wave absorbing wave dissipating block.

2. Description of the Related Art Tetrabod (registered trademark) is commonly used as a conventional wave absorbing and dissipating block. This means that the four protrusions are 1
It consists of concrete blocks formed in a star shape at an angle of 20 degrees, and the entire embankment body is constructed by stacking multiple blocks.

Problems to be Solved by the Invention However, with such conventional blocks, when the waves collide with the blocks, more energy is absorbed and the waves are dissipated. The problem is that the droplets can reach the land. In addition, the conventional blocks described above have the problem that the flow of water is obstructed, causing stagnation and causing organic matter to rot easily.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve these problems and provide a wave absorbing and wave dissipating block that can prevent the generation of wave splashes, allow water to flow sufficiently, and has good manufacturability. .

Elaborate Means to Solve the Problems In order to solve the above problems, the present invention provides column-shaped concrete fissures that are arranged laterally from the outside of the bay to the inside of the bay and that can be stacked in plural to construct an embankment body. A metal pipe body capable of forming a through hole extending from the outside of the bay to the inside of the bay is buried inside the block, and a sleeve is fitted into at least the end of the bone pipe on the outside of the bay; A suction port that opens at the end face of the block, a small diameter part that is also formed on the back side of the suction port and has a smaller diameter than the pipe body, and a small diameter part that is formed further back than the small diameter part. A connecting portion for connecting the inner surface of the tube body is provided.

Function: According to this configuration, nine waves propagating from the outside of the bay toward the inside of the bay are guided from the seven-leave suction port to the small diameter section, and then pass through the inner wall of the tube after passing through the connection section. At this time, the waves are easily guided to the small diameter part by the action of the suction port, and are propagated into the inside of the tube body while receiving a wave-dissipating effect by colliding with the inner surface of the small diameter part. Inside the tube, the cross-sectional area of the passage is increased compared to the small diameter portion of the sleeve, so that energy is absorbed and waves are dissipated reliably.

Wave dissipation also occurs when waves collide with the inner surface of the tube.

According to the above, waves do not collide with a rigid body, but are dissipated while passing through the tube, so generation of wave splash can be effectively prevented. Furthermore, as the waves pass through the tube, a water flow is generated inside the tube, so stagnation can be prevented.

When manufacturing this wave-dissipating block, all that is required is to cast a comfleet ring around the metal pipe body, and to fix the sleeve by internally fitting it into at least the outer end of the pipe body.
A through hole whose cross-sectional shape changes along the length direction can be easily formed.

In addition, a sleeve similar to the above can be fixed to the inner end of the tube, or a constricted part with the same shape as the sleeve can be formed using a hardening material such as concrete or resin mortar. You can. Alternatively, the open end of the tube body may be directly communicated with the inside of the bay.

Embodiment FIG. 1 (at (cl) shows an embodiment of the wave absorbing wave-dissipating block (1) based on the present invention. Here, (2) is a block made of concrete in the shape of a rectangular prism. Inside the block (2), there is a cast iron pipe body (3) that extends in the length direction of this block (2).
is embedded in the pipe body (3), and a through hole (4) is formed in the tube (3).
) is formed. The pipe body (3) has a socket (5) at the outer end of the block (2) and an inlet (6) at the inner end of the bay, and has an anti-corrosion coating on its inner surface. A mortar lining layer (7) is formed for this purpose.

A cast iron sleeve (8) is attached to the outer end of the tube body (3).
is embedded. This sleeve (8) has a bellmouth-shaped suction port αQ that opens at the end surface (9) on the outside of the bay of the block (2), and this suction port a0 is also formed on the inside of the bay and is lower than the pipe body (3). It has nine small-diameter portions having a small diameter, and a connecting portion (6) that connects the small-diameter portion αυ and the inner surface of the tube body (3) on the inner side of the bay than the small-diameter portion. Suction port αQ
The back surface of the tube (3) is in contact with the open end of the socket (5), and the open end of the connection port is in contact with the inner surface of the tube (3).

The annular space formed between the sleeve (8) and the pipe body (3) is filled with injection port α→Yoshi concrete (to) formed by penetrating the pipe body (3). There is. In addition, a protrusion αQ that protrudes radially inward is formed in a portion of the tubular body (3) corresponding to the annular space αJ by pressing or the like, and the tubular body (
3) and the concrete α day are combined to prevent the concrete a5 and the sleeve (8) from coming out in the axial direction.

At the inner end of the tube (3), that is, inside the insertion port (6), a constricted portion αη having a smaller diameter than the inner diameter of the tube (3) is formed over a certain length. The constricted portion αη is formed of a hardening material such as concrete or resin mortar, and has a bellmouth-shaped discharge port α value that opens at the inner end face (T) of the block (2).

A connecting portion (1) whose diameter increases smoothly toward the inner surface of the tube body (3) is formed on the real end side of the constricted portion αη.

The concrete block (2) is shaped like a square prism, so its outer surface has four sides G! 1) @ @
(Wealth) is appearing. At both ends of the length of the block (2) on one side @, over a certain range,
A convex portion (E) of a constant height is formed. This convex part□□
□ is formed as a wa9 shape across the entire width of the side @.

On the side surface opposite to the side opening on which the convex part (7) is formed, a recessed part is formed corresponding to the convex part (7), and a plurality of blocks (2) are formed. When arranged side by side, the convex portions (to) and the concave portions (e) of adjacent blocks (2) are configured to fit into each other. Similarly, the side [
In 111i@, a pair of convex portions (to) are formed at the center in the length direction of the block (2), and a pair of concave portions (1) are formed at corresponding positions on the side surface. .

FIG. 2 is a cross-sectional view of a breakwater as a breakwater body constructed by stacking a plurality of wave-dissipating blocks (1) vertically and horizontally. Here, @ is a foundation installed on the ocean floor, and the top surface of this foundation is from the outside of the bay (7) to the inside of the bay (0).
It is formed to form an upward slope toward Il. The wave-dissipating blocks (υ) are stacked on top of the upper surface of this foundation (G), so that they are similarly inclined.Also, when stacking, the nine adjacent wave-dissipating blocks (1) The convex portion 4 and the concave portion (E) are fitted into each other to firmly connect each wave-dissipating block (1).On top of the uppermost wave-dissipating block (1) is an upper mounting portion e+
21], the upper surface of which is formed horizontally for the passage of people. These upper parts c3'2
A convex part (to) and a concave part (to) are also formed in the base part (to) and are configured to fit in with the concave part (to) and convex part (to) of the wave-dissipating block (1). .

Figure 3 shows the inside or outside side of the breakwater (b) with the same configuration as that shown in Figure 2.

This is a diagram. As shown in the figure, the wave-dissipating blocks (1) are arranged and stacked to form a diamond shape when viewed from the end. By adopting such a stacked structure, it is possible to obtain a breakwater with excellent strength since the stress in the vertical direction can be fractionated in any direction.

When manufacturing the wave-dissipating block (1) shown in Fig. 1, a sleeve (8) is attached to the socket (5) side of the pipe body (3) of a predetermined length.
With the tube (3) inserted, the tube (3) is covered with a formwork, and concrete is poured into the formwork to completely form the block (2). At this time, concrete (A) is simultaneously poured into the annular space 0 through the injection port α. Alternatively, the annular space Cl5fc may be left as it is without providing the injection port α4, and in this case, the sleeve (8) is fixed to the entire pipe body (3) by welding or the like. Finally, the constricted part α7) is formed, but at that time, the insertion opening (
A tubular or round bar-shaped mold is inserted into the tube (6), and a hardenable material such as concrete or resin mortar is filled between the mold and the tubular body (3). By filling the connecting portion (E) in this manner, the material protrudes from the end of the mold, and the connecting portion (E) naturally takes on a curved cross-sectional shape as shown in the figure.

The cast iron surfaces of the tube body (3) and sleeve (8) can be coated with anti-corrosion coating such as zinc spraying, or coated with a coating that can prevent the adhesion of algae. Also, block (
Since a metal tube (3) is embedded in the tube (2), the block (2) can be reinforced by this tube (3), but if necessary, the block (2) can be reinforced. ) can also be embedded with reinforcing bars.

When waves advance from the outside of the bay (7) to the breakwater (A) shown in Figure @2, the waves are easily guided to the suction port (small diameter part a1 due to the action of 100), and this small diameter part αυ, pipe It passes through the inside of the body (3) and the diaphragm part aη to reach the bay inner light 1. At this time, energy is absorbed and dissipated by collision with the small diameter portion αυ or the inner surface of the tube body (3), or by a change in the passage cross-sectional area from the small diameter portion toward the tube body (3). Also, when the wave propagates from the constriction part αη to the inside of the bay, the passage cross-sectional area increases and wave dissipation is performed. In this way, the waves are dissipated while passing through the through hole (4), so it is possible to dissipate the waves while preventing the generation of wave splash. The drawing part σ force is
Against waves returning from the inner part of the bay to the outer part of the bay, the small diameter part 0
It acts in the same way as υ.

As the waves pass through the through hole (43ft), a water flow will be generated inside the through hole (4), and water will always flow inside the through hole (4), causing stagnation. Further, by tilting the wave-dissipating block (1) as in this embodiment, water flow can be generated based on this tilt.

In addition, the above 97! In the embodiment, the constricted portion αη is formed of a curable material at the end of the tube (3) inside the bay, that is, inside the insertion port (6). A sleeve similar to the outer end may be fitted and secured. Alternatively, the opening end of the insertion port (6) may be simply communicated with the inner side 313 of the bay. In addition, the α force of the constriction part is applied to the thick cylindrical body in advance.
3), and after the cylindrical body has hardened, it may be inserted and fixed inside the socket (6).

Furthermore, the sleeve (8) can be formed to be thicker in the radial and axial directions at the open end of the suction port QO. , can possess sufficient strength.

Effects of the Invention As described above, according to the present invention, not only is it possible to dissipate waves very well without generating wave splash and while ensuring the flow of water, but also it is possible to improve productivity. A good wave a absorption/dissipation block can be obtained.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the wave absorbing and dissipating block according to the present invention, (at is its plan view, (bl is its front sectional view, (C) is its left end view, and FIG. 2 is its top view. Cross-sectional view showing the breakwater constructed with wave-dissipating blocks shown in Figure 1, Figure 3
The figure is a side view of the breakwater. (2)...Block, (3)...Tube, (4)...
・Through hole, (8)...Sleeve, 00...Suction port,
Oη...small diameter part, ■...connection part, ■...breakwater (
Embankment body),...Outside the bay, Kazu)...Inside the bay.

Claims (1)

[Claims] 1. Inside a column-shaped concrete block that is arranged laterally from the outside of the bay to the inside of the bay and can be stacked in multiples to construct an embankment body, from the outside of the bay to the inside of the bay. A metal pipe body capable of forming a through hole is embedded, a sleeve is fitted inside at least the outer end of the pipe body, and a suction port opening at the end face of the block and a suction port are provided in the sleeve. A small diameter portion formed on the back side of the mouth and smaller in diameter than the tube body, and a connecting portion formed further on the back side of the small diameter portion and connecting the small diameter portion and the inner surface of the tube body. A wave absorbing wave dissipating block characterized by: