JP2703200B2 - Coastal protection or river revetment construction method using stair-type blocks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a gently sloped embankment for shore protection or a structure for river revetment using stair-type blocks.

[0002]

2. Description of the Related Art Conventionally, as a gently sloped embankment for shore protection or a structure for river protection, for example, Japanese Patent Publication No. 60-53130.
As disclosed in Japanese Unexamined Patent Publication, from the lower bottom surface of the rectangular main plate A in which the upper surface is formed on a slope that is gentler than the lower bottom inclined surface, a support leg whose ground contact surface is substantially parallel to the lower surface of the rectangular main plate is used. There has been proposed a stair-like revetment structure in which a revetment block A constructed in a protruding manner is sequentially laid on an inclined surface B of a coastline or on a revetment of a river so that the master plates of the blocks are adjacent to each other. (See FIG. 6) In the figure, C is a chestnut stone, and D is a filling material filled in the through hole of the main plate of each block A. Other, E
Is top concrete and F is foundation concrete.

[0003]

However, since the stair-like structure for seashore preservation or seawall protection is made of concrete blocks, there is a fear that the natural environment is spoiled due to a sense of incongruity with the surrounding environment. there were. The present invention has been proposed in view of the problems of the prior art described above, and an object of the present invention is to provide a coastal conservation by a stair-type block that can create a natural scenery without a sense of discomfort with the surrounding environment. Or to provide river revetment construction methods.

[0004]

In order to achieve the above-mentioned object, according to the seashore preservation or river revetment construction method of the present invention, a natural stone having a shape and a natural color and having an open upper end surface is provided. At the periphery of the upper end opening of the fiber-reinforced cement shell for molding the rocky reef, concrete is poured into a formwork assembled with a steel formwork for molding the body of the step-type block, and the block is molded and cured, and then inverted. It is to be installed in the required places.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 is a bowl-shaped fiber-reinforced cement shell for forming a natural rock reef having a natural stone shape and a natural stone color tone.
A steel formwork 5 for stepwise block molding is assembled on a flexible object such as a sandbag 4 and the like at the upper end opening edge of the shell 1 and concrete 6 is placed in the assembled formwork. To form and cure a step-type block a having a natural reef-shaped portion 7 protruding from the surface of the block by the shell. After the step-type block is molded and cured in this way, the step-type block is turned upside down and the step-type block a is laid on the shore protection levee or the river revetment.

In the figure, b is a suction-prevention sheet layered on the surface of the same part, c and d are crushed stone and rubble stone sequentially laminated on the sheet b, e is top-end concrete, and f is basic rubble. Since the illustrated embodiment is configured as described above, the natural reef-shaped portion 7 is provided on the surface of the stair-type block a, so that the near-natural stone stair block closest to the reef forming the natural landscape is configured. In terms of civil engineering, not only does the conventional step-like revetment structure exhibit the same function, but the presence of the natural reef-shaped portion 7 on the surface of the step-type block a increases the wave-dissipating power. In addition, by using in combination with the conventional stair-type block, it is possible to create a natural landscape without an artificial discomfort by giving an accent effect on the landscape, and also to use the natural rock reef described above only in a portion necessary for the landscape. It is economical to use the step-type block a having the shape portion 7.

[0007]

According to the method of the present invention, a steel frame for forming a step-type block body is assembled around the upper end opening of a shell made of fiber-reinforced cement having the shape of natural stone and natural color. Construct a block formwork, cast concrete into the same formwork to shape and cure the block,
Then, the natural reef-shaped portion having the natural color of the fiber-reinforced cement shell is formed on the surface of the block formed by the steel formwork by inverting and installing at a required place, and it is necessary for the scenery. Only the part is integrally installed on the coastal protection dike or river revetment, and the molding and installation of the block are performed at the same time, and the entire landscape construction work is performed effectively and economically.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view showing an embodiment of a coastal protection or river revetment structure using a stair-type block constructed according to the method of the present invention.

FIG. 2 is a longitudinal sectional view showing a manufacturing state of the step block.

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

FIG. 4 is a side view of the block of FIG. 3;

FIG. 5 is a perspective view of the block shown in FIG. 3;

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 Kuriishi e Top end concrete f Foundation rubble 1 Fiber reinforced cement shell 2 Ground 3 Paving sand 4 Sandbag 5 Steel formwork 6 Concrete 7 Natural rock reef

Claims (1)

(57) [Claims] 1. A steel formwork for molding a step-type block main body around a periphery of an upper end opening of a shell made of a fiber-reinforced cement for molding a natural reef-shaped portion having a natural stone shape and a natural color tone and having an open upper end surface. A method of coastal protection or river bank protection using stair-type blocks, characterized in that concrete is cast into a formwork that is assembled, the blocks are molded and cured, then inverted and installed at required locations.