JP2001055747A - Water permeable pipe for retaining wall, concrete block for retaining wall, and retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calmly move moisture on the front side and rear side of a retaining wall while improving the appearance of the retaining wall. SOLUTION: The water permeable pipe 1, which has a cylindrical main body 2 made of porous concrete and a protective sheet covering the outer circumference of the main body 2 and in which porous concrete is exposed from both end faces 2a, is installed to the retaining wall. Since water calmly passes through the porous concrete of the water permeable pipe 1, the ground side is supplied gradually with moisture. Since the end faces of the porous concrete of the water permeable pipe 1 are exposed from the surface of the retaining wall and the end faces of a hollow pipe are not exposed, appearance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permeable pipe for a retaining wall provided for draining a retaining wall, a concrete block for a retaining wall for constructing a retaining wall, and for stabilizing a steep ground. Retaining wall provided in.

[0002]

2. Description of the Related Art Retaining walls have been constructed to stabilize steep slopes. Such a retaining wall, for example,
A concrete block for retaining wall having a plate-shaped retaining wall part and a retaining part integrally formed on the back of the retaining wall part is continuously stacked vertically, horizontally, and It is constructed by forming a backfill concrete layer on the back. Also, in order to prevent water pressure from the back of the retaining wall, a plurality of drainage pipes that connect the surface side of the retaining wall and the back side of the backfill concrete layer will be installed. As the drain pipe, a hollow pipe made of vinyl chloride is often used.

[0003]

Since the drain pipe of the conventional retaining wall is a hollow pipe, the hollow end face of the drain pipe is exposed on the retaining wall, and it is unsightly. Also, in a retaining wall installed as a revetment for a river or the like, if a drain pipe is provided, there is a problem that the water of the river rapidly permeates the ground and the ground is softened. If no drainage pipe is provided, the water in the river will not penetrate into the ground at all, so the water level in the ground will decrease, and the waterfront space in front and the ground in the back of the retaining wall will be cut off, taking into account the water circulation. The ecological continuity that has been broken is divided. In recent years, interest in nature and the environment has increased, and consideration has been required for ecosystems also for structures. The present invention has been made to solve such a problem.

[0004]

According to the present invention, there is provided a retaining wall having a pillar-shaped main body made of porous concrete and a protective sheet covering the outer periphery of the main body, and having both ends exposed to the porous concrete. It is a water permeable pipe. Porous concrete is porous concrete containing a large amount of coarse aggregate and has water permeability, so that excess water on the back of the retaining wall can be drained to the front. Unlike hollow pipes, porous concrete allows water to gradually pass through, so in the case of a retaining wall of a revetment such as a river, water from the river gradually flows to the ground side in the back through a water permeable pipe, and the ground is not affected without affecting the ground. Can be supplied with water. In addition, since water flows between the river and the ground, the movement of microorganisms and bacteria between the river and the ground becomes possible, and the ecosystem becomes continuous. The protective sheet prevents backfill concrete cement milk (concrete cement component) from penetrating into the columnar body and clogging the porous concrete. Therefore, materials that can block cement milk, such as paper and plastic sheets Should be fine. The column-shaped main body may be a column having an arbitrary cross-sectional shape, such as a column or a prism.

The present invention also provides a retaining wall having a plate-shaped retaining wall portion and a retaining portion integrally formed on the back surface of the retaining wall portion, and constructing the retaining wall by continuously stacking vertically and horizontally. A concrete block for a retaining wall, wherein a notch for installing a water permeable pipe is provided around a retaining wall portion in the concrete block for a retaining wall. When the blocks are stacked, the cutouts around the retaining wall portions form openings for installing the permeable pipes, so that the permeable pipes can be easily installed while the blocks are stacked. When the surface of the retaining wall is made of porous concrete, the surface of the constructed retaining wall becomes porous porous concrete, and grass and moss grow on the surface, so that a landscape close to nature can be obtained.

The present invention also provides a retaining wall formed by stacking concrete blocks, a backfill concrete layer formed on the back side of the retaining wall, and a water-permeable front side of the retaining wall and a backside of the backfill concrete layer. In a retaining wall having a plurality of permeable pipes communicating with each other, the permeable pipe has a pillar-shaped main body made of porous concrete and a protective sheet covering the outer periphery thereof, and both ends are exposed to the porous concrete. It is a retaining wall characterized by. Since the permeable pipe is made of porous concrete, excess water on the back of the retaining wall is drained to the front, while in the case of a retaining wall on a revetment such as a river, water from the river gradually flows through the permeable pipe to the ground at the back. Thus, water can be supplied to the ground without affecting the ground. In addition, since water flows between the river and the ground, the movement of microorganisms and bacteria between the river and the ground becomes possible, and the ecosystem becomes continuous. Since the outer periphery of the water permeable pipe is covered with the protective sheet, cement milk of the backfill concrete does not enter the water permeable pipe main body, and the porous concrete is not clogged. Since the permeable pipe is not a hollow pipe, the hollow pipe end face is not exposed on the surface of the retaining wall, and the installed permeable pipe is not conspicuous, so that the appearance of the retaining wall is improved.

If the surface of the retaining wall is made of porous concrete, grass and moss grow on the surface of the retaining wall, and a landscape close to nature can be exhibited. Further, the porous concrete end face of the water permeable pipe is completely inconspicuous.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 1 shows a water permeable pipe 1 of an embodiment.
2 is a front view of the concrete block 4 for retaining wall of the embodiment, FIG. 3 is a top view of the block 4, FIG. 4 is a side view of the block 4, and FIG. FIG. 6 is a cross-sectional view showing the retaining wall 11 taken along a water-permeable pipe portion, and FIG. 7 is a cross-sectional view showing the retaining wall 11 taken along a retaining portion 7. 8 is a front view of the concrete block 20 for retaining wall according to the embodiment, and FIG.
10 is a top view of the block 20, FIG. 10 is a side view of the block 20, FIG. 11 is a sectional view taken along line AA in FIG. 8, and FIG. 12 is a sectional view of the retaining wall 30 of the embodiment.

A water-permeable pipe 1 shown in FIG. 1 has a columnar body 2 made of porous concrete covered with a protective sheet 3, and the porous concrete of the body 2 is exposed at both end faces 2a. . Both end faces 2a are slightly inclined with respect to the axis of the water permeable pipe in accordance with the inclination of the retaining wall.

A concrete block 4 for retaining wall shown in FIG.
Has a plate-shaped retaining wall portion 5 and a retaining portion 7 integrally formed on the back surface of the retaining wall portion 5, and as shown in FIG. Is a concrete block for retaining walls. A convex portion 9 is formed at the upper end of the retaining portion 7 and a concave portion 10 is formed at the lower end. When the blocks are stacked, the convex portion 9 and the concave portion 10 are engaged with each other to prevent the blocks from shifting. The basic shape of such a block is well known. Block 4 features:
A point that a notch 8 for installing a water permeable pipe is provided around the retaining wall portion 5 (in this case, four corners), and a point that the surface of the retaining wall portion 5 is a porous concrete 6. Notch 8
5, when the blocks 4 are stacked, they are combined with the notches 8 of the adjacent blocks 4 to form an opening having substantially the same shape as the outer shape of the water-permeable pipe 1. In this case, the notch has a fan shape obtained by dividing the circle into four equal parts, and the notch of the four blocks forms a circular opening for installing the water-permeable pipe. Since the surface of the retaining wall 5 is made of porous concrete 6, the surface of the retaining wall on which the retaining wall 5 is gathered exposes the porous concrete.

The blocks 4 are sequentially stacked on a foundation 15 so as to be continuous vertically and horizontally. The permeable pipes 1 are installed while being stacked. Each time one or several layers are stacked, backfill concrete is constructed on the back of the retaining wall by casting in place, and a backfill concrete layer 12 is formed. In the case of FIG. 6, the backfill concrete layer 12 is applied just to the rear end of the stay portion 7, but the backfill concrete layer may be thinner or thicker. The end face 2a of the water permeable pipe 1 is exposed on the surface side of the retaining wall surface and the back side of the backfill concrete layer 12, and communicates with both sides so that water can pass therethrough. A backfill material 13 such as crushed stone is buried between the backfill concrete layer 12 and the ground 14. A top concrete 16 is constructed on the upper end of the retaining wall 11.

Since the water-permeable pipe 1 is made of porous concrete, the retaining wall 11 of the river revetment constructed in this manner drains excess water on the back of the retaining wall to the front side, while the water of the river is permeable when the water is increased. Gradually the back ground 14 through the pipe 1
It can flow to the side and supply moisture to the ground 14 without affecting the ground. In addition, since water flows between the river and the ground, the movement of microorganisms and bacteria between the river and the ground becomes possible, and the ecosystem becomes continuous. Since the outer periphery of the water permeable pipe 1 is covered with the protective sheet 3, cement milk of the backfill concrete does not enter the water permeable pipe main body 2, and the porous concrete of the main body is not clogged. Since the surface of the retaining wall 11 is porous porous concrete, grass and moss grow on the surface, and a landscape close to nature is exhibited. Further, since the end face 1a of the water permeable pipe 1 exposed on the surface of the retaining wall is also made of porous concrete, the water permeable pipe is completely unobtrusive and has a good appearance.

The concrete block 20 for retaining walls shown in FIGS. 8 to 11 comprises a retaining wall portion 21 made of concrete and a retaining portion 23 made of expanded metal protruding from the back surface thereof. As shown in FIG. 11, the base end of the expanded metal of the retaining portion 23 is welded and fixed to a reinforcing bar inside the retaining wall portion.
Since the retaining portion 23 is made of expanded metal, the weight of the block 20 is reduced, and the required amount of concrete is small. Therefore, cost reduction can be realized, and transportation and construction can be facilitated. The front surface of the retaining wall 21 is a porous concrete 22. Semicircular notches 24, 2 around the retaining wall 21 (in this case, the center of the upper side and lower side)
5 are provided, and when the blocks 20 are stacked, the notch 24 of the lower block and the notch 2 of the upper block are provided.
5, a circular opening is formed, and the opening is formed in the opening.
Is set.

FIG. 12 shows an example of the retaining wall 30 constructed by using the block 20. The blocks 20 are sequentially stacked on an appropriate foundation 35 so as to be continuous vertically and horizontally. The permeable pipes 31 are installed while being stacked. Each time one or several layers are stacked, backfill concrete is constructed on the back of the retaining wall by cast-in-place and the backfill concrete layer 3
Form 2 The water permeable pipe 31 is formed by covering the outer periphery of a cylindrical body made of porous concrete with a protective sheet in the same manner as the water permeable pipe 1 described above. It is exposed on the front side and the back side of the backfill concrete layer 32, and communicates with both sides so that water can flow. A backfill material 33 such as crushed stone is buried between the backfill concrete layer 32 and the ground 34.

[0015]

The permeable pipe of the present invention drains excess water on the back of the retaining wall to the front while water such as rivers gradually flows to the ground side on the back through the permeable pipe without affecting the ground. Moisture can be supplied to the ground. In addition, since water flows between the river and the ground, the movement of microorganisms and bacteria between the river and the ground becomes possible, and the ecosystem becomes continuous. Since the outer periphery is covered with the protective sheet, it is possible to prevent the cement milk of the backfill concrete from entering the water permeable pipe main body and clogging the porous concrete of the main body.

The concrete block for retaining wall of the present invention comprises:
Since the opening for installing the water permeable pipe is formed by the notch provided around the retaining wall portion, the water permeable pipe can be easily installed while stacking the blocks.

In the retaining wall according to the present invention, since the main body of the installed permeable pipe is made of porous concrete, the permeable pipe exposed to the surface of the retaining wall has a function of draining surplus water from the ground to the front side. The end face of the tube is unobtrusive and looks good. Since the outer periphery of the water permeable pipe is covered with a protective sheet,
The cement milk of the backfill concrete prevents the porous concrete of the main body from being clogged. If this retaining wall is used as a revetment wall for rivers, etc., excess water on the back of the retaining wall will be drained to the front side, while at the time of rising water, the water of the river will gradually flow to the ground side on the back side through the permeable pipe, affecting the ground. Water can be supplied to the ground without giving. In addition, since water flows between the river and the ground, the movement of microorganisms and bacteria between the river and the ground becomes possible, and the ecosystem becomes continuous.

[Brief description of the drawings]

FIG. 1 is a front view and a central longitudinal sectional view of a water permeable pipe 1 of an embodiment.

FIG. 2 is a front view of the retaining wall concrete block 4 of the embodiment.

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

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

FIG. 5 is a schematic front view of the retaining wall 11 of the embodiment formed by stacking the blocks 4;

FIG. 6 is a cross-sectional view showing the retaining wall 11 cut along a permeable pipe portion.

FIG. 7 is a cross-sectional view showing the retaining wall 11 cut along the retaining portion 7;

FIG. 8 is a front view of the retaining wall concrete block 20 of the embodiment.

9 is a top view of the block 20. FIG.

FIG. 10 is a side view of the block 20.

FIG. 11 is a sectional view taken along line AA in FIG.

FIG. 12 is a sectional view of a retaining wall 30 according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Permeable pipe 2 Main body 3 Protective sheet 4 Block 5 Retaining wall part 6 Porous concrete 7 Prevention part 8 Notch 9 Convex part 10 Concave part 11 Retaining wall 12 Backfill concrete 13 Backfill material 14 Ground pile 15 Foundation 16 Top end concrete 20 Block 21 Retaining wall part 22 Porous concrete 23 Prevention part 24 Notch 25 Notch 26 Reinforcement 30 Retaining wall 31 Permeable pipe 32 Backfill concrete 33 Backfill material 34 Ground mountain 35 Foundation

Claims (8)

[Claims] 1. A water-permeable pipe for a retaining wall, comprising a porous concrete pillar-shaped main body and a protective sheet covering the outer periphery thereof, and porous concrete exposed at both end faces. 2. A concrete block for a retaining wall having a plate-shaped retaining wall portion and a retaining portion integrally formed on the back surface of the retaining wall portion, wherein the retaining wall is constructed by continuously stacking vertically and horizontally. , A notch for installing a water permeable pipe around a retaining wall portion is provided. 3. The concrete block for retaining wall according to claim 2, wherein the surface of said retaining wall portion is made of porous concrete. 4. The concrete block for retaining wall according to claim 2, wherein said retaining portion is made of expanded metal. 5. A retaining wall formed by stacking concrete blocks, a backfilling concrete layer formed on the backside of the retaining wall, and a plurality of waterflowable communicating front surfaces of the retaining wall surface and the backside of the backfill concrete layer. In the retaining wall having a water-permeable pipe, the water-permeable pipe has a columnar body made of porous concrete and a protective sheet covering the outer periphery thereof, and both end faces are those in which the porous concrete is exposed. Retaining wall 6. The retaining wall according to claim 5, wherein the concrete block has a plate-shaped retaining wall portion and a retaining portion integrally formed on the back surface of the retaining wall portion, and is stacked vertically, horizontally, and continuously. A retaining wall block for constructing the retaining wall by using a notch for installing a water-permeable pipe around the retaining wall portion. 7. The retaining wall according to claim 6, wherein the surface of the retaining wall portion of the concrete block is made of porous concrete. 8. The retaining wall according to claim 6, wherein the retaining portion of the concrete block is made of expanded metal.