JPH0931942A - Coastal conservation or river revetment structure by stepwise block and construction therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create a natural scenic view and increase the wave-absorbing capacity, by protruding natural shore reef-shaped materials on the surface of stepwise blocks laid on a revetment or the like for coastal conservation. SOLUTION: A bowl-shaped fiber reinforced cement shell 1 having a natural rock shape and color is supported on flexible materials like sandbags arranged on sand laid on the base so as to well fit thereon and steel frames 5 to form stepwise blocks are assembled at the opening edge of the upper end of the shell 1 and then concrete is placed. In this way, a stepwise block (a) in which natural shore reef-shaped materials protrude on the surface thereof, is formed and cured. Thereafter, the stepwise block is overturned and laid at the revetment for coastal conservation or the river revetment. By forming natural shore reef-shaped materials 7 on the surface of the block, a natural rock stepwise block closest to the shore reef making a natural scenic view is constituted and it not only brings out the same function with a conventional stepwise revetment structure but also increases the wave-absorbing capacity owing to the natural shore reef-shaped part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gently sloping dam body for coastal protection using a staircase block or a structure for river revetment, and a construction method using the staircase block.

[0002]

2. Description of the Related Art Conventionally, as a structure for gently sloping levee body for coastal conservation or river revetment, for example, Japanese Patent Publication No. 60-53130.
As disclosed in Japanese Unexamined Patent Publication No. 1993-242, from a lower bottom surface of a rectangular main plate A whose upper surface a is formed to have a slope more gradual than a lower bottom inclined surface, a grounding surface is a support leg whose ground surface is substantially parallel to the lower bottom surface of the rectangular main plate. A stair-shaped revetment structure has been proposed in which a revetment block A formed by projecting is laid on the inclined surface B of the coastline or on the revetment of a river so that the main plates of the blocks are adjacent to each other. . (See FIG. 6) In the figure, C is a cobblestone, and D is a filling material which is filled in the through holes of the main plate of each block A. Other, E
Is top concrete and F is basic concrete.

[0003]

However, since the stair-like structure for coastal protection or revetment is made up of concrete blocks, there is a fear that it may cause a sense of discomfort with the surrounding environment and impair the natural landscape. there were. The present invention has been proposed in view of the above problems of the prior art, and an object of the present invention is to protect coasts by staircase blocks that can create a natural landscape that does not feel uncomfortable with the surrounding environment. Or it is to provide a structure for river bank protection.

[0004]

In order to achieve the above-mentioned object, a coastal protection or river revetment structure according to the present invention is provided with a natural structure on the surface of a stair-type block laid on a coastal protection bank or river revetment. It is constructed by integrally installing natural reef-shaped parts with different colors. According to the invention of claim 2, a stepped block main body is formed around the upper end opening of a fiber-reinforced cement shell for forming a natural reef shape part having a natural stone shape and a natural color tone and having an open upper end surface. Concrete is placed in a mold made by assembling a steel mold, the block is molded and cured, and then it is inverted and installed at a required location.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The preferred embodiments of the present invention shown in the drawings will be described below. Reference numeral 1 is a bowl-shaped fiber-reinforced cement shell for natural reef shape molding, which has a natural stone shape and a color tone of natural stone.
While supporting well on a flexible object such as sandbags laid on top, a steel mold 5 for stepped block molding is assembled at the upper opening edge of the shell 1, and concrete is assembled in the assembled mold. A stair-type block a in which 6 is cast, and the natural reef-shaped portion 7 is projected on the block surface by the shell.
Mold and cure. Mold the staircase block like this,
After curing, turn it over and lay a stair block a on the coastal protection bank or river bank.

[0006] In the figure, b is a suction preventive sheet laminated on the surface of the same part, c and d are crushed stones and crushed stones successively laminated on the sheet c, e is top end concrete, and f is rubble foundation. Since the illustrated embodiment is configured as described above, since the natural reef-shaped portion 7 is provided on the surface of the staircase type block a, the nearest natural stone staircase block that is the closest to the reef forming a natural landscape is configured. In terms of civil engineering, not only the same function as that of the conventional staircase-shaped revetment structure is exhibited, but also the presence of the natural reef-shaped portion 7 on the surface of the staircase type block a increases the wave-dissipating force. In addition, by using together with the conventional staircase type block, it is possible to create an accent effect on the landscape and create a natural landscape without artificial discomfort, and also the natural reef described above only in the necessary parts of the landscape. It has a shape portion 7. It is economical to use the stepped block a.

[0007]

As described above, in the coastal protection or river revetment structure according to the present invention, the natural reef-shaped portion is projected on the surface of the stepped block laid on the coastal protection bank or the river revetment. This makes it possible to exert the same engineering function as that of the conventional staircase type block while at the same time increasing the wave-dissipating force.

Further, the natural reef shape part having a natural color tone integrally installed on the surface of the staircase block constitutes a coastal conservation or river revetment structure that most closely resembles a reef forming a natural landscape. The revetment structure is constructed in harmony with the landscape without damaging it. Furthermore, by installing stair blocks where natural reef-shaped parts with the above-mentioned natural colors are integrally installed, only in areas that can be seen by people on coastal structures and in areas where it is necessary for the landscape, the entire landscape can be constructed. Will be effective and economical.

According to a second aspect of the present invention, a staircase type block mold is constructed by assembling a steel formwork for molding a staircase type block main body around the upper end opening of a shell made of fiber reinforced cement having the shape of natural stone and a natural color tone. Configure the block by molding concrete into the same mold and cure it, and then reverse and install it at the required location on the surface of the block molded by the steel mold. A natural reef-shaped part having a natural color tone made of a shell made of steel is integrally installed on a coastal protection bank or a river bank, and the blocks are molded and installed at the same time.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a preferred embodiment of a coastal protection or river revetment structure using a stair type block according to the present invention.

FIG. 2 is a vertical sectional view showing a manufacturing state of the stepped block.

FIG. 3 is a plan view showing an embodiment of the stepped block.

FIG. 4 is a side view of the block of FIG.

5 is a perspective view of the block of FIG.

FIG. 6 is a perspective view showing a conventional structure.

[Explanation of symbols]

 a Stair type block b Suction prevention sheet c Crushed stone d Chest stone e Top concrete f Foundation rubble stone 1 Fiber reinforced cement shell 2 Ground 3 Sand sand 4 Sandbag 5 Steel formwork 6 Concrete 7 Natural reef shape part

Claims (2)

[Claims] 1. A coastal protection or river revetment characterized in that a natural reef-shaped portion having a natural color tone is integrally installed on the surface of a staircase block laid on a coastal protection bank or river revetment. Construction. 2. A steel formwork for molding a staircase type block body around the upper end opening of a fiber-reinforced cement shell for molding a natural reef shape part having a natural stone shape and a natural color tone and having an open upper end surface. A method for coastal protection or river bank protection using stair-type blocks, in which concrete is placed in a formwork that is assembled, the blocks are molded and cured, and then the blocks are inverted and installed at the required locations.