JPS62137307A - Breakwater - Google Patents

Abstract

PURPOSE:To prevent the pollution of sea water inside or outside a port by enabling sea water inside or outside of a port to come in or cut easily by a method in which a structure such as breakwater, etc., is set on a mound formed on the seabed, and a path leading to the outside and outside of the port is provided in the mound. CONSTITUTION:In forming a mound 3 from rubble, tubes 5 are buried at an adequate interval in the mound 3 to form a path 5a. A concrete structure 4 such as caisson, etc., is set on the mound 3 to construct a breakwater. The intrusion of waves into a port A can thus be prevented, and also since sea water in the inside A and outside B of a port can come in or out through the path 5a, the pollution of sea water in the inside A of the port can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a breakwater that allows seawater to flow into and out of a port.

(Prior Art and its Problems) A breakwater maintains calm in a port by dissipating or reflecting the energy of waves from the open sea, thereby protecting ships and facilities within the port. However, for this purpose, breakwaters are placed to surround the port, and the width of the port entrance is narrow to prevent waves from entering. As a result, the seawater inside the port was limited to the vicinity of the port entrance, where access to and from outside stations was narrow, which sometimes exacerbated the contamination of the seawater within the port.

(Object of the Invention) The present invention has been proposed in view of the above points, and its purpose is to provide a passageway in the lower part of a mound, that is, an embankment, built on the seabed, which allows seawater to flow in and out of the port. established,
The purpose is to provide a breakwater that prevents seawater pollution within the port.

(Means for Solving the Problems) That is, in order to achieve the above object, the present invention provides a passage connecting the inside and outside of the port in a mound made on the seabed on which a concrete structure will be installed. There is.

(Function) In the present invention, by installing a passage, for example, by installing a pipe at the lower part of the embankment body, the inside of the port and the outside of the port are communicated through the passage, so that seawater inside the port and outside the port can easily enter and exit. This is what I did.

(Embodiments) Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which 1 is a breakwater, and this breakwater 1 is provided on the seabed 2, and includes a mound 3 corresponding to the lower part of the breakwater body, and a mound 3 provided on this mound 3. In this case, it is characterized in that at least one or more passages 5a are provided in the lower part of the embankment body, that is, the mound 3, in a substantially horizontal direction.

That is, when constructing the mound 3 using rubble, pipes 5 (m-pipe, unreinforced concrete pipe, reinforced concrete pipe, ceramic pipe, synthetic resin pipe, etc.) are placed inside the mound 3 at appropriate intervals. Embedded in passage 5a
is provided so that the inner side of the port and the outer side B of the port communicate with each other.

In this case, the cross-sectional shape of the tube 5 embedded in the mound 3 is not limited to a circular shape as shown in the figure, but may be a square shape as shown in FIG. 2, or even a polygonal shape such as a triangle, although not particularly shown. Moreover, by connecting the respective tubes in the lateral direction within the mound 3 as shown in FIG. 3, it is also possible to use the tubes as a PM to enhance its effectiveness. Furthermore, the tube 5 to be embedded may be one tube extending from the inner side A of the port to the outer side B of the port, or may be a plurality of short tubes connected together.

A concrete structure 4 is built on the mound 3 created in this way.
For example, a caisson can be installed to serve as a breakwater.

In addition, the caisson 4 is constructed by first installing a floating dock (not shown) on the seabed, building the caisson 4 on its deck, then launching the floating dock together at an appropriate location, and separating the caisson 4 from the floating dock. . For installation, the caisson 4 is towed to a location, water is poured to fix it in the rubble mound 3, and each chamber of the caisson 4 is filled with filler 6, such as earth and gravel, and the open upper part is filled with concrete 4a.
All you have to do is hit . In addition, caisson 4 does not necessarily need to be constructed as a floating dock, but can be constructed using a dry dock type, hanging type,
Of course, it is also possible to construct it using a separate route method.

Furthermore, the concrete structure 4 on the upper part of the embankment body does not necessarily have to be a caisson (it may be a stack of blocks, cast-in-place concrete, etc.).

Therefore, in this breakwater 1, the seawater inside the port A does not stagnate and is replaced with the seawater in the open sea via the passage 5a due to ocean currents and tides, thereby preventing the seawater inside the port from becoming contaminated. I can do it.

In general, the influence of waves is greater at the water surface and smaller at the bottom.
This is particularly noticeable in waves with short wavelengths.

Therefore, in areas where the water depth is relatively large, it is placed under the embankment body.

Even if there is an opening in the section, there is no problem as the embankment body has sufficient wave-dissipating effect. Furthermore, since the pipe is installed near the seabed, it can be effectively used as a fishing track.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the pipe body is not embedded in the mound 3 (the passage 5a is formed by masonry when it is manufactured), unlike the first embodiment. Therefore, since no pipe body is used, the cost can be reduced accordingly.In addition, other configurations,
The operation is similar to the previous embodiment.

(Effects of the Invention) As described above, according to the present invention, since the passage is formed in the mound on the seabed, seawater can flow into and out of the port, and seawater pollution can be prevented.

Furthermore, when constructing the mound, it is easy to construct because it is no different from constructing a normal breakwater except that a passage is provided inside the mound.

[Brief explanation of drawings]

Figures 1 (a) and (b) show an embodiment of the present invention, in which (a) is a partial front view, (b) is a side sectional view, and Figure 2 is an example of another embodiment of the shape of the passage of the present invention. , FIG. 3 shows an embodiment of a tube forming a passage, and FIG. 4 shows another embodiment of the present invention.

Claims (1)

[Claims] A breakwater is characterized by having a passage connecting the inside and outside of the port in a mound built on the seabed where concrete structures are installed.