JPH1018317A - Concrete block retaining wall structure and fish bank structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily construct a concrete block retaining wall with no sudden collapse at a large scale. SOLUTION: Three through-holes 3, 4, 5 solid-crossing one another are provided almost at the center of an massive block. A number of concrete blocks 1 are connected one another in the three-dimensional directions with ropes 15 inserted into the through-holes 3, 4, 5 to construct a retaining wall. A number of blocks 2 with two through-holes 3, 4 each solid-crossing each other in almost perpendicular directions formed in the centers are connected each other in the two-dimensional directions with ropes inserted into the through-holes 3. 4 to form a bottom 17 and a peripheral wall 18 and massive materials such as stones and crushed concretes are filled 10 spaces formed by the bottom and peripheral walls to construct the retaining wall. The formed retaining wall has flexibility, so that it can be deformed and subsided when the lower part of the retaining wall is eroded by a water stream to prevent the advance of erosion and the danger of collapse at a time if the errosion is advanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block used for constructing a retaining wall (including what is called a revetment wall) and a fish reef, and a retaining wall structure constructed using such a concrete block. And fish reef structures.

[0002]

2. Description of the Related Art Various types of concrete blocks have been proposed and used as concrete blocks used for constructing retaining walls. This type of concrete block can be broadly classified into a pile block (in this specification, blocks that are piled up from the bottom to construct a retaining wall are collectively referred to as a pile block) and a siding block. A representative example of a stacking block is a so-called block, which forms a retaining wall by stacking diagonally and pouring concrete into the back surface and empty space in the block wall to integrate them. The one-way upholstery block is a plate-like block and forms a retaining wall by being arranged so as to be attached to a slope.

[0003] The sloped block is mainly used to prevent the surface of the slope from collapsing. In order to prevent the block from peeling off the slope and falling, the gap (joint) between the blocks is mortared. A wire that is connected to adjacent blocks by embedding or molding a U-shaped metal fitting at the end of the block and connecting the metal fittings to each other, or by providing vertical and horizontal through holes in the block and passing through the through holes. For example, adjacent blocks are connected with each other. The structure that connects the blocks with metal fittings or wires leaves a gap between adjacent blocks and allows plants to grow in the gaps, giving a near-natural environment to the retaining wall, as well as plant stems and The roots allow for more stable placement of the block on the slope.

[0004]

However, when a retaining wall having such a structure is used as a revetment wall, if the bottom of the retaining wall is eroded by water flow, the retaining wall is held for a while by an anchoring force between the retaining wall and the slope. However, as the bottom erosion progresses, the retaining wall loses support (see FIG. 9), and when the erosion progresses to a certain limit, the retaining wall collapses at once with the sediment behind it. For this reason, when the river rises due to a typhoon or the like, a disaster such as collapse of the river bank and collapse of the house on the river bank occurs.

[0005] The collapse of the retaining wall for such a reason is caused by the fact that the retaining wall continues to be supported by the slope behind it even after the lower part of the retaining wall is eroded, which is caused by the above-mentioned structure. This is a problem that occurs in all of the retaining walls of the Chichi block and the lawn block. Retaining walls that do not cause such problems include, for example, retaining walls constructed of girder blocks and retaining walls constructed of gabions that have been used for a long time. In addition, the construction of the gabion retaining wall is troublesome, and it is difficult to construct a steep retaining wall, so that the land use rate is poor and the durability is poor.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the conventional retaining wall, it is an object of the present invention to provide a technical means capable of easily constructing a retaining wall without a sudden and large-scale collapse.

[0007]

The concrete block according to the present invention is characterized in that at least three through holes 3, 4, 5 which are three-dimensionally crossed with each other are provided substantially at the center of the massive block. Things. The retaining wall structure according to the second aspect and the fish reef structure according to the third aspect using the block according to the first aspect have a rope 15 in which a large number of concrete blocks 1 having the above structure are inserted into the through holes 3, 4, and 5. And are interconnected in three-dimensional directions.

A concrete block according to a fourth aspect of the present invention is characterized in that two through-holes 3 and 4 are provided at substantially the center of the massive block so as to cross each other in a direction substantially perpendicular to each other. The retaining wall structure according to claim 5 is the block 2 according to claim 4.
Are connected in a two-dimensional direction by a rope 15 inserted through the through holes 3 and 4, and a bottom 17 and a peripheral wall 18 around which the base is connected by the rope 15 are formed. The space defined by the bottom and the peripheral wall formed as described above is filled with a lump such as a stone, a concrete block, or a crushed concrete lump.

[0009]

The retaining wall constructed as described above has a certain degree of flexibility, so that when the water flow erodes under the retaining wall, the retaining wall is deformed and sinks by its own weight according to the erosion. Since the bottom is supported and the eroded portion is closed, the erosion is prevented from progressing, and there is no danger that the erosion will collapse at one time when the erosion proceeds. In addition, since many gaps are generated between the blocks, when used as a revetment wall, an excellent function as a fish reef is exhibited.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The blocks 1 and 2 of the present invention can have various shapes such as a sphere, a rectangular parallelepiped, an abacus ball, and a shape imitating natural stone. When it is shaped, provide irregular irregularities on its surface,
It is considered that the adjacent blocks are prevented from sticking to each other, and that the adjacent blocks are connected in a state where the adjacent blocks slightly move when connected by a cable.

As shown in FIG. 2, the through holes 3, 4, and 5 of the block 1 are provided with pins 8, 9 whose tips contact each other when assembled into side plates 6, 7 which are opened and closed in parallel. It can be formed by providing. As shown in FIG. 2, a through-hole which is formed in a vertical direction during molding is provided with a pin 12 having a height of half the height of the cavity from the bottom plate 11 of the mold, and a draft in the opposite direction is formed at the upper end of the pin. It can be formed by fixing the tip of the provided connecting pin 13 and molding. Connecting pin 13
Is fixed to the top of the pin 12 erected from the bottom surface by, for example, a through bolt 14 or the like, and the connecting pin 13 is pulled upward by removing the through bolt 14 when removing the mold. Conical portions 8a, 9a, 12 are provided at the base of each pin (connecting portion with the side plate and the bottom plate) and at the upper end of the connecting pin.
a, 13a, the through-hole 3 of the molded block,
It is preferable that the opening ends of the four and five are formed into a trumpet shape. The trumpet-shaped open ends are formed in the through holes 3, 4, 5,
This is effective in facilitating the operation of inserting the cable into the cable, and avoiding damage caused by the cable being rubbed between the blocks at the joint of the blocks.

The block 1 thus formed is
One of them is hung at the construction site, and the cords are inserted into the through holes 3, 4, and 5, respectively. Then, while the adjacent blocks are hung down, the cords inserted into the blocks adjacent to the through holes are inserted. While doing block 1
By placing and stacking, a structure of desired volume is built along the slope to be protected. In this case, if a plurality of types of blocks are used in different shapes and sizes and they are connected alternately, a gap is formed between the blocks to allow plants to grow and to be a place for fish to live. In addition, the structure (dimension in the direction perpendicular to the slope) of the structure constructed in this manner is narrowed upward (the number of blocks arranged in the thickness direction is reduced), so that the structure is further reduced. A stable retaining wall can be constructed.

The rope 15 for connecting the blocks may be made of a metal material such as a chain or a stainless wire, or may be a tough synthetic resin rope such as an aramid fiber rope.

The retaining wall 16 formed by connecting a large number of the blocks 1 in the three-dimensional direction with the cords 15 when the bottom is eroded by a water flow or the like is settled by its own weight. The eroded portion is protected by the sinking block to prevent erosion from progressing. Retaining wall 1
6 is composed of a large number of blocks connected in a slightly movable state by the ropes 15, so that when the bottom is eroded, it deforms and sinks according to the erosion, so that it collapses at a stretch. Nothing like that happens.

Block 1 in the above embodiment is:
Although the through holes 3, 4 and 5 are provided in three directions, the block 2 (FIG. 6) provided with the through holes 3 and 4 in two directions can be formed by the same mold as described above. . The blocks having the through holes 3 and 4 in these two directions can be connected in a two-dimensional direction by a cable 15 in which a large number of blocks are arranged in a mesh. By changing the arrangement direction of the blocks to be connected from a horizontal direction to a vertical direction at a desired position, as shown in FIG. 7, a bottom 17 and a peripheral wall 18 formed from a large number of blocks connected two-dimensionally are formed. Can be formed.

In this manner, the peripheral wall 18 is formed around the bottom 17 having a desired area while stacking blocks.
The retaining wall 16 is formed by putting crushed stone, chestnut stone, a concrete block of an appropriate shape, a block of concrete block generated when an old concrete building is destroyed, and the like into the interior surrounded by the peripheral wall 18 to a desired height. Can be formed.

At this time, in order to prevent the peripheral wall 18 from swelling due to the weight of the crushed stone or the like put into the inside, a plurality of ropes (tension wires) for connecting an appropriate part of the peripheral wall 18 to the opposing peripheral wall portion. ) Is effective. Also,
The retaining wall 16 is formed by forming the ceiling 19 so as to close the space into which the crushed stone or the like is inserted while connecting the blocks 1 at the upper side of the peripheral wall with the arrangement direction of the blocks 1 being horizontal inside the peripheral wall and connecting with the ropes 15. can do.

The retaining wall 16 thus formed can deform and settle when the bottom is eroded, like the retaining wall of FIG. 5 described above. The effect is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a block according to a first embodiment.

FIG. 2 is a schematic cross-sectional view showing an example of a block forming mold.

FIG. 3 is an enlarged sectional view of a connecting portion of a pin for forming a through hole in a vertical direction.

FIG. 4 is a perspective view showing an arrangement mode of blocks.

FIG. 5 is a schematic cross-sectional side view of a retaining wall constructed in the manner of FIG. 4;

FIG. 6 is a perspective view of a block having a through hole in two directions.

FIG. 7 is a perspective view showing the arrangement of the blocks in FIG. 6;

FIG. 8 is a schematic cross-sectional side view of a retaining wall constructed in the manner of FIG. 7;

FIG. 9 is a schematic cross-sectional side view of a retaining wall constructed with a Machin block.

[Explanation of symbols]

 1 block 2 block 3 through hole 4 through hole 5 through hole 15 rope 17 bottom 18 peripheral wall 19 ceiling

Claims (5)

[Claims] 1. A concrete block, characterized in that at least three through holes (3, 4, 5) which are three-dimensionally crossing each other are provided in a substantially central portion of a massive block. 2. A holding device comprising a plurality of concrete blocks (1) according to claim 1 interconnected in a three-dimensional direction by a rope (15) inserted through their through holes (3, 4, 5). Wall structures. 3. A fish reef structure in which a large number of concrete blocks (1) according to claim 1 are interconnected in a three-dimensional direction by ropes (15) inserted through their through holes (3, 4, 5). Stuff. 4. A concrete block characterized by having two through-holes (3, 4) three-dimensionally crossing each other substantially perpendicularly at a substantially central portion of a massive block. 5. A block (2) according to claim 4, wherein a plurality of blocks (2) are connected in a two-dimensional direction by a cable (15) inserted through the through hole (3, 4) to form a bottom (17) and a periphery of the bottom. A peripheral wall (18) whose base is connected by the cable (15) is formed in the space defined by the bottom and the peripheral wall formed as described above. A retaining wall structure characterized by being filled with an object.