JP3079381U - Revetment concrete block - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a concrete block for revetment which is strong and excellent in workability, which is usually used on the outside of a riverbed which is not washed by running water or on a greening revetment embankment such as a lake. SOLUTION: A concrete block having a flat bottom surface and a thickness having a predetermined strength, and formed in a square shape when viewed from the front side, has cross-shaped projecting ribs protruding from the surface, and drains water at intersections thereof. It has a hole for vegetation which has a hole and penetrates in the thickness direction, and has a hole for connection in which a bar is inserted in communication with each other when the block bodies are arranged.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 TECHNICAL FIELD The present invention relates to a concrete embankment used for a large embankment at a place where water is not normally flooded, for example, a flood pond in a river, or a dike for a lake or marsh.

[0002]

[Prior art]

 Usually, embankments constructed outside riverbeds that are not washed by running water generally have grass vegetation on the surface of the embankment.

[0003] However, even with such embankments, there is a high risk of collapse if there is an increase in water due to excessive heavy rain. For this reason, concrete blocks for revetment are piled up along the slope and reinforced.

[0004] In the case of revetment using such concrete blocks, there is a problem that the surrounding scenery is significantly changed because the concrete surface is exposed. For this reason, a concrete block for revetment having a structure described in JP-A-6-248627 is conventionally used.

[0005] Fig. 11 shows a concrete block for revetment described in the above-mentioned publication, and a pair of vertically-oriented plate shapes to be embedded in embankment embankments are formed on the bottom surface of a thick block body 50 formed in a square shape. The anchor portions 51, 51 are integrally provided so as to protrude. A pair of protruding ribs 52, 52 are integrally formed on the surface side of the block body 50, and a wide dovetail-shaped concave groove 53 is formed between the pair of protruding ribs 52, 52. .

A concrete filling hole 54 penetrates through the block body along the surface direction. Since the concrete filling hole 54 is used for embankment concrete blocks, when the block main bodies 50 are arranged, a steel wire and concrete are filled between the concrete filling holes 54 of the adjacent block main bodies 50 and the adjacent block bodies 50 are filled. Is a concatenation of

The construction of such a conventional seawall concrete block is performed as follows. First, the block main body 50 is stacked at a predetermined angle on a foundation made of cast-in-place concrete with the anchor portion 51 facing the slope side of the embankment. The stacking is performed such that the concrete filling holes 54 communicate between the block main bodies 50. In addition, when stacking the block main body 50, the bottom surface of the block main body 50 is filled with backfill soil and integrated with the embankment embankment. At the time of such stacking, the concrete filling hole 54 in the communicating state is filled with the steel wire and the concrete, and the adjacent block main bodies are connected. Thereafter, the surface embankment is compacted while filling the surface embankment between the concave grooves 53 on the front surface side. At this time, by mixing grass seeds and fertilizer into the surface embankment, the lawn can be grown, and thereby the greening seawall can be used.

[0008]

[Problems to be solved by the invention]

 However, in the conventional concrete block for revetment, since the anchor portion 51 projecting from the bottom surface of the block body 50 needs to be arranged on the embankment embankment, the construction is troublesome. In addition, since the block body 50 becomes large and the weight increases by the length of the projecting portion of the anchor portion 51, the handling becomes difficult and the construction efficiency decreases.

[0009] Furthermore, after the concrete blocks are stacked, the gap between the anchor portions 51, 51 on the bottom of the concrete block is filled with earth and sand for backfilling and integrated with the embankment embankment. was there.

[0010] In addition, when the concrete blocks are stacked, the surface embankment compacted between the projecting ribs on the surface of the block main body slides down along the slope and easily collapses. For this reason, it is necessary to make the compaction of the cover soil uniform and sufficient, and as a result, there is a problem that the construction efficiency is deteriorated. The present invention has been made in consideration of such conventional problems, and has good handling properties, is easy to construct, can improve construction efficiency, and can cause collapse after construction. The purpose of the present invention is to provide a concrete block for revetment without rust.

[0011]

[Means for Solving the Problems]

 To achieve the above object, the concrete block for revetment according to the invention of claim 1 is characterized in that a bottom surface is formed in a flat surface, and a cross-shaped projecting rib projects from the surface; A drain hole that penetrates the intersection of the protruding ribs; a vegetation hole that is provided in a portion of the block main body other than the protruding rib forming portion and penetrates in the thickness direction of the block main body; And a connecting hole through which the steel bar is inserted when the block bodies are arranged adjacent to each other. The projecting ribs rise from the block body at different angles. The block main bodies are arranged such that a slope rising at a large angle is positioned above a slope rising at a small angle.

The invention according to claim 2 is that the vegetation hole penetrates the block main body so that the surface side of the block main body has a large diameter and the bottom surface side has a small diameter, and is eccentric on the surface side and the bottom side. The concrete block for revetment according to claim 1, characterized in that:

Such a revetment concrete block is a surface embankment having a constant thickness in which a concrete revetment wall is constructed by lining up the embankment embankment vertically and horizontally and embedding projecting ribs on the surface of the concrete revetment wall. A greening revetment embankment can be constructed by laying vegetation and applying vegetation to the embankment.

In addition, the cross rib-shaped projecting ribs form a diamond-shaped recess between the projecting ribs by combining with the projecting ribs of the block body adjacent to the left and right when the block bodies are arranged side by side. Prevents surface embankment from sliding. On the other hand, the protruding ribs of the upper, lower, left and right block bodies constitute bent-line concave parts when they are arranged vertically adjacent to each other, so that the surface embankment is prevented from sliding below the slope of the embankment.

Further, the projecting rib has two slopes rising at different angles from the block body, and the block body is positioned such that the slope rising at a large angle is located above the slope rising at a small angle. By arranging, it is easy to fill the surface embankment into the rhombic concave portion and the polygonal concave portion, and the compaction can be made more uniform. Thereby, the sliding of the surface embankment is suppressed.

[0016] Furthermore, since the vegetation hole penetrates the block body so that the surface side of the block body has a large diameter and the bottom side has a small diameter, plants such as seedlings can be easily planted. In addition, the penetrating holes are eccentric on the front side and bottom side, so that not only can the vegetation seedlings grow vertically without bending at the root, but also the roots of the seedlings can be Since it protrudes into the main body, concrete revetment and embankment embankment can be firmly established.

[0017] Rainwater that has infiltrated the surface embankment collects at the protruding rib intersections of the block body below the slope of the embankment, but flows through the drainage hole penetrating the intersection to reach the bottom of the embankment. The drain can be surely done.

[0018]

Embodiment

 1 to 7 show a concrete block 1 for seawall according to an embodiment of the present invention.

The revetment concrete block 1 has a rectangular block body 10 having a bottom surface 14 and a surface 15, a drain hole 20, a vegetation hole 30, and a connection hole provided in the block body 10. 40, and the whole is made of reinforced concrete. The block body 10 has a thickness having a predetermined strength, and is formed in a square shape when viewed from the front. The bottom surface 14 of the block main body 10 is a flat surface as shown in FIGS. 2 to 4, and there is no protrusion from the bottom surface 14. The protruding rib 11 protrudes from the surface 15.

As shown in FIG. 1, the ends of the block main body 10 coincide with the four corners of the square, and the block main body 10 protrudes from the surface 15 in a cross-like shape that intersects at substantially the center of the square. . The protruding rib 11 is formed to have a trapezoidal cross section. Therefore, two flat surfaces 11a and 11b rising from the surface 15 of the block main body 10 in an inclined manner, and a flat top surface in which the top portions of the slopes 11a and 11b are continuously provided. 11e. In addition, one slope 11a of the two slopes rises at a larger angle than the other slope 11b. During construction, the slope 11a rising at a large angle is located on the upper side, and the slope 11b rising at a small angle is located on the lower side. The block bodies 10 are lined up so as to be located on the side.

The drain hole 20 is provided at the intersection of the cross rib-shaped projecting ribs 11. The drain holes 20 are provided so as to penetrate the intersections of the protruding ribs, and at the time of construction, the block bodies 10 are arranged so that the drain holes 20 face up and down.

The vegetation hole 30 is formed in a portion of the block main body 10 other than the portion where the projecting rib 11 is formed. In this embodiment, the vegetation hole 30 is formed in one of the sections defined by the protruding ribs 11, but may be formed in two or more sections. The vegetation holes 30 are for extracting seedlings and the like grown on the embankment, and penetrate the block body 10 in the thickness direction.

As shown in FIG. 6, the vegetation hole 30 penetrates the block main body 10 such that the surface 15 side of the block main body 10 has a large diameter and the bottom surface 14 has a small diameter. In addition, the vegetation hole 30 of this embodiment penetrates so that the center of the opening on the surface 15 side and the center of the opening on the bottom surface 14 are eccentric. It has a sloping structure. With such a structure, a seedling or the like penetrating through the vegetation hole 30 can grow so as to face upward of the block body 10.

As shown in FIGS. 2, 4, and 7, the connection hole 40 penetrates along the surface direction of the block main body 10, and a steel bar is inserted therein, and concrete is filled therein. You. The connection hole 40 is provided in two lines with respect to one block main body 10, but may be more than two.

Next, a procedure for constructing a revetment using this embodiment will be described.

As shown in FIG. 8, a cast-in-place concrete is used to construct a dorm 60, and a permeable backing earth and sand 61 is packed between the embankment lower part and the settled concrete, and the concrete is fixed to a predetermined inclination angle. Finish the embankment embankment so that it becomes the slope of. A suction-prevention mat 62 or a water-blocking sheet is laid thereon, and the block main body 10 is stacked thereon to a desired inclination height.

At this time, the block body 10 is arranged such that the slope 11 a of the protruding rib 11 is located on the upper side. Further, the drain hole 20 is located at a position penetrating in the vertical direction, and has a structure in which permeated rainwater or the like is discharged to the lower surface of the embankment body.

At this time, the bottom surface 14 of the block body 10 is a flat surface, and a protrusion or a perforation prevention mat that is effective for maintaining the strength of the embankment against rainwater and running water is perforated or broken by a projection. There is no need to worry about damage to the equipment, and the efficiency of enforcement can be improved.

Furthermore, since there is no gap such as anchors between the bottom of the concrete block and the embankment, it is necessary to stack up to a desired inclination height while filling backfill earth and sand one by one from the bottom of the embankment. Blocks can be piled up one after another, improving the efficiency of enforcement.

At this time, as shown in FIG. 9, the upper and lower block main bodies 10 are laterally shifted by １ ／ of the length in the lateral direction, and are set at the left side 40 a of the connection hole 40 of the lower block main body. A so-called cloth shape is formed so that the right side hole 40b of the connection hole 40 of the upper block body communicates with the upper side.

In this manner, each time the block bodies 10 are sequentially stacked and stacked to a predetermined height, the bar steel 63 is inserted into the connecting hole, concrete is poured into the filling hole, and the blocks are integrated vertically and horizontally. This allows the stacking process and the connecting and connecting steel bars to proceed in parallel.

In this manner, the retaining pile 64 is provided at the bottom of the embankment of the concrete revetment constructed on the slope of the embankment. As shown in (1), the surface covering soil 66 is laid with the covering soil and compacted.

At this time, as shown in FIG. 9, the protruding ribs 11 form a rhombic concave portion and a polygonal linear concave portion as shown in FIG. In addition, since the angle of the upward slope of the protruding rib 11 is large, it is possible to suppress the sliding and uniformly perform the compaction.

Furthermore, it is desirable to plant trees such as seedlings at key points of the vegetation holes 30 in order to reinforce the embankment body and to green the surface embankment. When planting seedlings, the vegetation hole 30 is easy to plant because of the so-called slash-shaped through hole in which the surface of the block body has a large diameter, and the center of the through hole is eccentric in the vertical direction with respect to the slope of the embankment. Therefore, the root can be firmly implanted. Holes that are not vegetated also have the function of preventing slippage between the embankment and the surface embankment.

Finally, grass seed fertilizer is mixed in the surface embankment in advance, or lawn is pasted on the surface and grown to form vegetation (not shown). As the plants grow, their roots hold the embankment and become firmly established.

[0036]

[Effect of the invention]

 As described above, in the present invention, the block main body having a flat bottom surface eliminates the step of stuffing the backfill soil, and the step of stacking the block main body A and the step of inserting the connecting iron rods such as reinforcing bars. Enforcement efficiency can be greatly improved because it can proceed in parallel. Furthermore, it is possible to prevent breakage of the suction mat and the impermeable sheet that reinforce the strength of the embankment body and maintain the strength.

Further, the block itself is large and excellent in workability, and is strong by being integrated in a mat shape by a connecting iron bar, but exerts an appropriate flexing property against changes in the embankment ground.

In addition, the surface embankment fits into a diamond-shaped concave portion and a polygonal concave portion having a large angle formed by the protruding rib on the surface of the block body, and the surface embankment does not easily slide out, so that it is easily washed off. The greenery is maintained by the seedlings planted in the vegetation holes by rainwater and vegetation on the surface soil.

[Brief description of the drawings]

FIG. 1 is a front view of a revetment concrete block according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a bottom view of the same.

FIG. 5 is a right side view of the same.

FIG. 6 is a front view taken along line AA of FIG.

FIG. 7 is a front view taken along the line BB.

FIG. 8 is a cross-sectional view of a reinforcing bar showing a completed state of the revetment according to the present invention.

FIG. 9 is a front view of the same.

FIG. 10 is an enlarged view of a connecting portion according to the embodiment.

FIG. 11 is a plan view of a seawall concrete block known in Japanese Patent Application No. 6-248627.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Block main body 11 Protrusion rib 11a, 11b Slope 11e Top surface 14 Bottom surface 15 Surface 20 Drain hole 30 Vegetation hole 40 Connection hole 50 Block main body 51 Anchor part 52 Protrusion rib 53 Depression groove 54 Concrete filling hole 60 Dome 61 Sand 62 Suction prevention mat 63 Steel bar 64 Stop pile 65 Pick stone 66 Surface soil cover

Claims (2)

[Utility model registration claims] 1. A block main body having a flat bottom surface and projecting cross-shaped protruding ribs on the surface, a drain hole penetrating an intersection of the protruding ribs in the block main body, and a protrusion in the block main body. A vegetation hole provided in a portion other than the rib forming portion and penetrating in the thickness direction of the block main body; and a vegetation hole penetrating along the surface direction of the block main body and communicating with each other when the block main bodies are arranged adjacent to each other. And a connecting hole through which a steel bar is inserted. The projecting rib has two slopes rising at different angles from the block body, and the slope rising at a large angle is located above the slope rising at a small angle. A concrete block for revetment, wherein the block bodies are arranged so as to be located on the side. 2. The vegetation hole penetrates the block main body so that the surface side of the block main body has a large diameter and the bottom side has a small diameter, and is eccentric on the front side and the bottom side. Item 2. A concrete block for revetment according to item 1.