JP2001011840A - Triangular prism frame type concrete block for civil engineering structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a triangular prism frame type concrete block capable of economically and efficiently constructing a film and stabilized revetment wall equipped with high confluent efficiency to natural environment and a retaining wall and being used also for constructing a fish reef or the like. SOLUTION: A triangular prism frame type concrete block 1 having a lattice combined with a frame material is provided to one or two faces of the peripheral surface, i.e., one or two faces showing a rectangular frame-shape. The surface having the lattice of the block 1 is used as the outside surface and is put side by side, and a civil engineering structure such as fish reef, wave absorbing dyke, revetment wall, retaining wall or the like is constructed by piling up the surface. The strength of the block 1 against external force in the direction changing the rectangular frame into a rhombus can be increased by making a batten 5 slantly extended from the frame material include in the lattice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-sized concrete block used for constructing civil engineering structures such as fishing reefs, revetment walls or retaining walls, road and railway subgrades, and has a triangular prism-shaped frame type. It relates to concrete blocks.

[0002]

2. Description of the Related Art A triangular prism frame type concrete block formed by an integrated assembly of beam-like concrete materials arranged at the ridge of a triangular prism has been proposed by the applicant of the present application in Japanese Patent Application Laid-Open No. 9-217304. ing. The proposed concrete block is a large block suitable for efficiently constructing subgrades and retaining walls using heavy machinery, and is a civil engineering structure with an open interior space by stacking triangular prism frame-type blocks. To build.

[0003] When a subgrade is constructed with this structure, the area divided into right and left by the subgrade extending linearly on the surface of the ground communicates through an open internal space formed by a triangular prism frame type concrete block. The risk of destroying the existing environment or ecosystem of the area.

[0004]

After proposing the above triangular prism frame type concrete block, researches for verifying the advantages of the block have been continuously conducted by the present applicants. In the process, the advantages of using triangular prism-shaped concrete blocks for the construction of seawalls and retaining walls have been found, and for its application, various improvements to be made to conventional triangular-frame-type concrete blocks. The proposal was proposed and considered.

The present invention has been made as a result of research based on the above proposals and studies, and is intended to economically and efficiently construct a strong and stable revetment wall and retaining wall having high fusibility with the natural environment. It is an object of the present invention to provide an improved triangular prism frame type concrete block which can be used for constructing a fishing reef or the like.

[0006]

According to the present invention, a grid integrated with a frame member is provided on one or two surfaces of a triangular prism frame type concrete block, that is, on one or two surfaces having a rectangular frame shape. The above-mentioned problem is solved by providing. Although the lattice may have a fitting structure, a structure formed integrally with the frame is suitable for manufacturing. The mesh roughness of the lattice may be determined in consideration of the particle size of the filler to be filled in the inside of the block in manufacturing and the like. If necessary, a net or a water-permeable mat may be attached to the back of the lattice when constructing the retaining wall or the like, so that the internal filler can be prevented from flowing out of the lattice.

A triangular prism frame type concrete block is a large block having a side length of 2 to 3 m or more, and has a great advantage when various civil engineering structures are constructed using heavy machinery. Be demonstrated. Therefore, in the conventional triangular prism frame type concrete block, a considerably large opening is formed on each surface of the block. By providing a grid integrally with the frame material on one or two surfaces of the opening, the shielding property between the inside and the outside of the block through the surface provided with the grid can be enhanced as necessary, and the triangular prism frame type concrete block It is possible to realize more favorable functions when used for fishing reefs, seawalls, retaining walls, etc., without impairing the compatibility with the natural environment possessed by.

According to a first aspect of the present invention, there is provided a triangular prism frame type concrete block for civil engineering structure in which a triangular prism frame is formed by an integrated set of elongated concrete frame members arranged at the ridge portions of the triangular prism. An object of the present invention is to provide a triangular prism frame type concrete block in which a lattice integrated with a frame material is provided on one or two surfaces of a frame surface.

[0009] A second aspect of the present invention provides a concrete block having a triangular prism frame type concrete block according to the first aspect, wherein the lattice has an inclined bar extending obliquely from the frame material.

[0010] The invention of claim 3 proposes the triangular prism frame type concrete block of claim 1 or 2 in consideration of a manufacturing method, wherein at least one has a lattice in a frame, and at least one has a lattice. The structure comprises a structure in which three rectangular frame-type concrete blocks having no lattice inside are connected at the long side of each frame.

The grid provided in the rectangular frame portion includes a crosspiece extending obliquely from the frame material, whereby the strength of the block against external forces in the direction in which the rectangular frame is deformed into a rhombus can be increased, and the deformation of the triangle can be reduced. High rigidity can also be imparted to the rectangular frame-shaped surface of the triangular prism frame type concrete block.

Further, the triangular prism frame type concrete block according to the third aspect of the present invention forms the triangular prism frame by combining two-dimensional rectangular frames, so that the structure of the molding die for molding the block is simplified and the structure of the block is reduced. The molding operation is also facilitated, so that it is useful as a means for providing the triangular prism frame type concrete block according to the present invention at low cost.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a concrete block according to the invention of the present application and a civil engineering structure constructed by the concrete block will be described below with reference to embodiments shown in the drawings. FIG. 1 is a perspective view showing one embodiment of a concrete block according to the present invention, which is formed by a plurality of bars 5 inclined at 45 degrees to a frame member 4 on one of rectangular frames formed on the peripheral surface of a regular triangular prism frame. 1 shows an example in which a lattice to be formed is provided by integral molding.

[0014] Triangular prism frame type concrete block 1 of FIG.
Is one of the rectangular frame blocks 2 with a lattice shown in FIGS.
The two rectangular frame blocks 3 having no lattice shown in FIG. 4 are assembled by fastening with bolts and nuts inserted into bolt holes 6 arranged along the long sides thereof. The bolts and nuts for fastening are made of stainless steel, and mortar or an adhesive is applied to the fastening surfaces 7 of the rectangular frame blocks 2 and 3. The heads and nuts of the bolts are dropped into recesses and covered with mortar or an adhesive. Thereby, the corrosion resistance to bolts and nuts is increased.

The lattice is formed by a plurality of bars 5 inclined at 45 degrees with respect to the rectangular frame member 4. The fastening surfaces 7 between the rectangular frame blocks are provided at an inclination angle of 30 degrees with respect to the surface of the rectangular frame, and the short sides and the long sides of the three rectangular frames are equal to each other. The fastening forms a regular triangular prism frame, and a lattice is formed on one of the rectangular frame surfaces.

FIG. 5 shows an example of a fishing reef formed on the sea floor using a plurality of triangular prism frame type concrete blocks 1 of FIG. A trapezoidal frame-shaped fishing reef is formed by arranging the blocks 1 in a partially stacked state. The outward facing side of the reef has a grid, so that small fish can escape through openings in the grid when chased by large fish. When building such a reef,
If two rectangular frames facing the upper side of the two blocks arranged below are provided with a lattice, a fishing reef with more excellent concealment properties can be obtained. Also, a lattice can be provided in the triangular prism with a fitting structure on the small side surface, and a fishing reef with higher concealment properties can be obtained.

FIG. 6 shows the triangular prism frame-type block 8 of the conventional structure (without lattice) between the blocks 1 of FIG. 1 with the surface on which the lattice 5 is provided facing outward and arranged in parallel. Are stacked, and the inner space is filled with rock stone or split stone to form a breakwater.

FIG. 7 shows a block 5 of FIG.
This is an example of the construction of a revetment wall by arranging the surface facing the sea or river, filling it with chestnut stone, split stone, etc., and stacking a similar structure on it. Breakwaters and seawalls with these structures form a large number of narrow spaces inside which communicate with the outside world, so that they can provide an abundant habitat for small animals and plants.

FIGS. 8 to 10 show examples in which a retaining wall is constructed using the blocks of FIG. In the case of a retaining wall, earth and sand may be filled inside the stacked blocks. By appropriately using crushed stones and crushed stones, both the strength of the retaining wall and the compatibility with the natural environment can be achieved. The outflow of broken stones and earth and sand from the gaps of the grid that forms the retaining wall is called a metal wire or a synthetic fiber net or a suction prevention material on the back of the grid depending on the particle size of the filler. This can be prevented by adding a fibrous water-permeable fine mat.

When constructing the retaining wall, the upper wall may be stepped so that the upper wall is recessed from the lower wall, and as shown in the above-mentioned revetment wall, the lower wall and the upper wall may be used. Can be stacked as the same slope on the same surface. FIG. 8 shows that the second stage is stacked backward from the first stage,
This is an example in which the third stage is stacked on the same plane as the second stage.

Further, the slope angle of the slope is not necessarily limited to the slope angle of the block. In the example shown in FIG. 9, the inclination of the retaining wall is increased as the upper block is inclined. A steep retaining wall is being constructed.

Further, in the example shown in FIG. 10, the blocks of FIG. 1 are arranged side by side at an angle of 30 degrees with the lattice plane being on the front side, so that the retaining wall of each step is vertical, and the steps are formed in a stepped shape. Trees are planted on the terraces to make it a green retaining wall.

In the retaining wall constructed of the concrete block of the present invention, an opening communicating with the soil behind the block exists in the retaining wall, so that continuity between the inside of the retaining wall and the outside world is maintained through this opening. In addition, the flow of air and water and the growth of various small animals and plants are possible, and the cliff can be protected in a more naturally fused form.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a block.

FIG. 2 is a front view of a rectangular frame block provided with a lattice.

FIG. 3 is a side view of a rectangular frame block.

FIG. 4 is a front view of a rectangular frame block having no lattice.

FIG. 5 is a perspective view showing an example of constructing a fishing reef with the blocks of FIG. 1;

FIG. 6 is a perspective view showing an example in which a breakwater is constructed with the blocks of FIG. 1;

FIG. 7 is a perspective view showing an example in which a revetment wall is constructed with the blocks of FIG. 1;

FIG. 8 is a perspective view showing a first example of a retaining wall constructed by the blocks of FIG. 1;

FIG. 9 is a perspective view showing the second example.

FIG. 10 is a perspective view showing the third example.

[Explanation of symbols]

 1 concrete block 4 frame material 5 crosspiece

Claims (3)

[Claims] 1. A triangular prism frame type concrete block for a civil engineering structure having a triangular prism frame formed by an integrated set of elongated concrete frame members arranged at the ridge line portion of the triangular prism. Characterized in that a grid integrated with the frame material is provided on the surface,
Triangular prism frame type concrete block. 2. The triangular prism frame type concrete block according to claim 1, wherein the grid has an inclined bar extending obliquely from the frame material. 3. A triangular prism formed by connecting at least one rectangular frame type concrete block having a lattice in a frame and at least one not having a lattice in the frame at a long side portion of each frame. The triangular prism frame type concrete block according to claim 1 or 2, wherein the frame is formed.