Slope blocks

Abstract

To provide a block for a slope which improves the appearance quality of a wall when used for the purpose of greening, and which improves workability and drainage when used for purposes other than greening the wall. [Solution] A front wall 1 and a rear wall 3 each having an imitation stone-like protrusion 2 separated by a groove G are connected by a connecting wall 4, forming a space E between them, forming a space E between the front wall 1 and the rear wall 3, a front drain outlet 10 is formed in the front wall 1, and a rear drain outlet 11 is formed in the rear wall 3, the front drain outlet 10 and the rear drain outlet 11 are each formed as a columnar hole through which a drainage pipe HP can be inserted to discharge water on the slope side to the outside of the front wall 1 when the slope is covered, and are formed on an axis Q that slopes downward from the rear wall 3 to the front wall 1, the outer opening of the front drain outlet 10 is closed with a removable lid 20 by hitting it with a hammer, and the surface side of this lid 20 is shaped like an imitation stone separated by a groove G.

Description

[Technical Field]

[0001] This invention relates to slope blocks that can cover the slopes of rivers, roads, etc. and can also be used to green walls, and in particular to slope blocks that can be used even when greening of walls is not required. [Background technology]

[0002] Conventionally, a type of slope protection block capable of greening a wall surface is known, such as that described in Japanese Patent Publication No. 4139723 (Patent Document 1). This block is integrally constructed with a front wall with a surface shaped like a stone, a rear wall spaced a predetermined distance from the front wall, and a connecting wall that connects the front and rear walls and forms a space between them. Multiple front walls are stacked in a continuous manner to cover the slope. The upper surface of the front wall is formed with a recess that forms a gap between the lower surface of the front wall of another slope protection block stacked above it, allowing plants to grow. The front wall also has a small front drain opening that communicates with the space, and the rear wall has a rectangular rear drain opening that communicates with the space, and the connecting wall also has side drain openings.

[0003] When using these slope blocks to cover a slope, the required number of slope blocks are stacked and the spaces are filled with crushed stone, soil, sand, or other filler material that plants can grow in. This allows water supplied from the slope side through the rear drainage outlet to flow vertically and horizontally through the filler material in the partitioned space, allowing plants to grow through the gaps in the front wall, thereby greening the wall surface.

[0004] However, in some cases, slopes covered with these slope blocks do not necessarily require greening. In such cases, the required number of slope blocks are stacked, and the partitioned spaces are filled with concrete. This prevents plants from growing through the gaps in the front wall. Moreover, this type of slope block has a large thickness because the front and rear walls are spaced apart by a certain distance. Furthermore, since concrete is filled between the front and rear walls, the strength is increased, providing the advantage of extremely strong protection for the slope. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4139723 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the above-mentioned conventional slope blocks are used for wall greening, the front drainage outlet is exposed on the front wall surface, which reduces the appearance quality. This is particularly noticeable when the front side is formed like imitation stone. On the other hand, when used without the purpose of wall greening and by filling the space with concrete, the rear and front drainage outlets are blocked, resulting in insufficient drainage of water that accumulates on the slope side. To solve this problem, it is possible to create a drainage channel from the slope to the wall surface, but since the front drainage outlet is small and the rear drainage outlet is rectangular, even if these are used, construction work is extremely difficult.

[0007] The present invention was made in consideration of the above problems, and aims to provide slope blocks that improve the appearance quality of walls when used for greening purposes, and also improve workability and drainage when used for purposes other than greening walls. [Means for solving the problem]

[0008] The concrete blocks for slopes, which are constructed to achieve the above-mentioned objectives, are integrally provided with a front wall having a plurality of imitation stone-like convex portions partitioned by grooves on the surface thereof, a rear wall provided at a predetermined distance from the front wall, and a connecting wall connecting the front and rear walls and forming a space between the front and rear walls. The blocks are made of concrete and are stacked one on top of the other so that the front walls are continuous, covering the slope. a recess is formed on the upper surface and / or lower surface of the front wall to form a gap in which plants can grow between the upper surface of the front wall and the lower surface of the front wall of another slope protection block stacked on the upper surface; In a slope block, a front drainage outlet communicating with the space is formed in the front wall, and a rear drainage outlet communicating with the space is formed in the rear wall, The front drain outlet and the rear drain outlet are each formed as a columnar hole through which a drainage pipe can be inserted to discharge water on the slope side to the outside of the front wall when the slope is covered, and are formed on an axis that slopes downward from the rear wall to the front wall, the outer opening of the front drain outlet is closed with a removable lid that is struck with a hammer, and the surface side of the lid is formed in the shape of an imitation stone divided by grooves.

[0009] When constructing the slope blocks so that plants can grow through the gaps in the front wall, the front wall lid is left in place, and the required number of slope blocks are stacked, filling the gaps with a filler material, such as crushed stone or soil, that can support plants. Once the slope blocks are constructed, water supplied from the slope side through the rear drainage outlet flows through the filler material in the spaces defined by the slope blocks, allowing plants to grow through the gaps in the front wall, creating a green wall. Excess water is drained through the gaps in the front wall. In this case, the front wall lid remains in place, and the surface of the lid is shaped like a faux stone, defined by grooves. This means that the entire surface of the front wall has a faux stone appearance, making it less visible as a front drainage outlet. This, combined with the multiple faux stone-like protrusions, improves the appearance and enhances the exterior quality.

[0010] On the other hand, when installing slope blocks to prevent plants from growing through gaps on the front wall side, the covers of the necessary slope blocks are removed by hammering them with a hammer, thereby opening the front drainage openings. Next, drainage pipes are inserted into the front and rear drainage openings of the slope blocks from which the covers have been removed, and a filler such as mortar is filled into the front and rear drainage openings to secure the drainage pipes. In this case, the front and rear drainage openings are formed on an axis that slopes downward from the rear wall to the front wall, making it easier to insert and install the drainage pipes, thereby improving workability. The required number of slope blocks, including the slope block with the drainage pipe secured to it, are then stacked, and the space is then filled with concrete.

[0011] When the slope blocks are constructed, the gaps in the front wall are filled with concrete, preventing plants from growing through these gaps. Furthermore, the front and rear walls of these slope blocks are spaced a certain distance apart, making them thick. Furthermore, the gap between the front and rear walls is filled with concrete, increasing their strength and providing extremely strong protection for the slope. Furthermore, water that accumulates on the slope side can be drained through the drainage pipe, which slopes downward from the rear wall to the front, allowing for smooth drainage and improving drainage performance.

[0012] If necessary, multiple convex portions may be formed surrounding the lid, and the grooves defining the lid may be shared with the grooves defining the convex portions adjacent to the lid. Therefore, compared to when the lid is formed within the convex portion, the convex portions and the lid can be seen as independent imitation stones, thereby improving the appearance quality. Even when the lid is removed, the front drain port is visible, but its opening does not appear to be opened on the surface of the imitation stone-like convex portion. Instead, the surrounding convex portions appear as independent imitation stone-like portions, making the front drain port and the drain pipe opening facing it less noticeable, thereby improving the appearance quality.

[0013] If necessary, the lid is configured to have a surface side portion and a base end portion, the shape and size of the base end portion of the lid being formed to be the same as the shape and size of the inner edge of the outer opening of the front drain outlet, the base end portion of the lid being integrally connected to the inner edge of the outer opening of the front drain outlet, and the thickness of the base end being T, which is set to T = 5 mm to 15 mm, and the surface side portion of the lid is formed to be large enough to pass through the front drain outlet. The thickness T of the base end portion is desirably T = 10 ± 2 mm.

[0014] As a result, when the lid is struck with a hammer, a crack forms at the connection between the inner edge of the outer opening of the front drain outlet and the base end, and the lid separates from this area. In this case, the thickness T of the base end is set to T = 5 mm to 15 mm, which makes it easier to separate due to the crack, thereby improving workability. Furthermore, since the surface side of the lid is formed to a size that can pass through the front drain outlet, the separated lid can be dropped through the front drain outlet and out its inner opening. Therefore, the lid can be removed extremely easily and reliably, which improves workability and construction efficiency.

[0015] Furthermore, if necessary, the front drain outlet is formed in a frustum shape with its inner opening larger than its outer opening, and the rear drain outlet is formed in a frustum shape with its outer opening larger than its inner opening.

[0016] As a result, in the case of the front drain outlet, the cover that is separated by hitting it with a hammer moves from the outer opening toward the larger inner opening, making it easier to drop from this inner opening, which also improves workability. Furthermore, when attaching the drain pipe, it is inserted through the rear drain outlet and then inserted into the front drain outlet so that it protrudes from there. In this case, the tip of the drain pipe is inserted through the outer opening, which is larger than the inner opening, in the case of the rear drain outlet, and through the inner opening, which is larger than the outer opening, in the case of the front drain outlet, making it extremely easy to insert the drain pipe, which also improves workability and construction efficiency.

[0017] Furthermore, if necessary, the lower surfaces of the front wall and the rear wall are formed on a reference plane, the upper surfaces of the front wall and the rear wall are formed on parallel planes parallel to the reference plane, the horizontal width of the front wall and the horizontal width of the rear wall are set to the same, the front wall and the rear wall are formed into rectangular shapes that overlap each other when viewed from the front, a pair of the connecting walls are provided so that they are spaced apart by a predetermined distance from each other and positioned symmetrically about the front-to-back center line when viewed from above, a convex rib portion that protrudes upward from the parallel plane is provided at the upper end of each connecting wall, a concave rib portion that is recessed from the reference plane and engages with the convex rib portion is provided at the lower end of each connecting wall, the front drain outlet and the rear drain outlet are formed so that their axes overlap the center line when viewed from above, the recess is formed in the center of the upper surface of the front wall and is formed symmetrically on both sides of the front wall, and when the depth of the recess from the upper surface of the front wall is D, D is set to be 10 mm to 30 mm.

[0018] This allows the entire structure to be formed approximately symmetrically around the center line, and the front and rear drain outlets can be positioned in the center of the width direction, resulting in an extremely well-balanced structure that also improves the appearance quality.In addition, the depth D of the recess is set to D = 10 mm to 30 mm, which ensures plant growth while making it less likely for concrete to leak through gaps when the space is filled with concrete, thereby improving workability. [Effects of the Invention]

[0019] According to the present invention, when installing the slope block so that plants can grow through the gaps in the front wall, the front wall cover is left in place, but the surface of the cover is formed like a stone with grooves, i.e., the entire surface of the front wall is formed like a stone, so that it is difficult to see the front drainage outlet, and combined with the multiple protrusions of the stone, it looks good and improves the appearance quality. On the other hand, when installing the slope block so that plants cannot grow through the gaps in the front wall, the cover of the necessary slope block is removed by hitting it with a hammer, and drainage pipes are inserted and fixed into the front and rear drainage outlets. In this case, the front and rear drainage outlets are formed on an axis that slopes downward from the rear wall to the front wall, so that the drainage pipes can be easily inserted and installed, thereby improving the ease of installation.

[0020] In addition, by stacking the required number of slope blocks, including those with drainage pipes fixed, and then filling the gaps with concrete, it is possible to prevent plants from growing through the gaps, and in this slope block, the front and rear walls are spaced apart, making it thick, and the gap between the front and rear walls is filled with concrete, so it is strong and can provide extremely strong protection for the slope.In addition, water that accumulates on the slope side can be drained through the drainage pipe, and since the drainage pipe slopes downward from the rear wall to the front wall, drainage is smooth and improves drainage. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a front perspective view showing a slope block according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of a slope block according to an embodiment of the present invention, as seen from the side; [Figure 3] 1 is a side view showing a slope block according to an embodiment of the present invention; [Figure 4] 1 is a side view showing a state in which the cover has been removed and a drainage pipe has been attached to a slope block according to an embodiment of the present invention; FIG. [Figure 5] 1 is a front view of a slope block according to an embodiment of the present invention, showing a portion where a lid is provided. FIG. [Figure 6] 1 is a cross-sectional side view of a main part of a slope block according to an embodiment of the present invention, showing a portion where a lid is provided. [Figure 7] 1 is a cross-sectional side view of a main part of a slope block according to an embodiment of the present invention, showing a state in which a cover is removed. [Figure 8] 1 is a side cross-sectional view showing a state in which a slope block according to an embodiment of the present invention has been installed with the lid still attached. [Figure 9] 1 is a side cross-sectional view showing a state in which a slope block according to an embodiment of the present invention has been installed with the cover removed and a drainage pipe attached. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, a slope block according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in Figures 1 to 9, a slope block B according to an embodiment of the present invention is made of concrete and molded in one piece using a molding die. It includes a front wall 1 having a plurality of imitation stone-like protrusions 2 on its surface, partitioned by grooves G; a rear wall 3 provided at a predetermined distance from the front wall 1; and a connecting wall 4 connecting the front wall 1 and the rear wall 3 and forming a space E between the front wall 1 and the rear wall 3. A plurality of these front walls 1 are stacked in a continuous manner to cover a slope (not shown). The protrusions 2 are formed to protrude from a reference surface 1a that serves as a reference for the front wall 1. The surface of the protrusions 2 is formed with irregularities like imitation stone.

[0023] More specifically, the front wall 1 and the rear wall 3 are formed in a substantially flat shape, and as shown in Fig. 3, the reference surface 1a of the front wall 1 and the back surface 3a of the rear wall 3 are parallel to each other when viewed from the side, and the inclination angle θ relative to the horizontal reference plane Sa is set to, for example, θ = 60° to 70°. In this embodiment, θ is set to 65°. The inclination angle θ is not limited to this and may be set as appropriate.

[0024] Furthermore, the lower surface 1b of the front wall 1 and the lower surface 3b of the rear wall 3 are formed on the reference plane Sa, and the upper surface 1c of the front wall 1 and the upper surface 3c of the rear wall 3 are formed on a parallel plane Sb that is parallel to the reference plane Sa. The width of the front wall 1 and the width of the rear wall 3 are set to be the same, and the front wall 1 and the rear wall 3 are formed into rectangular shapes that overlap each other when viewed from the front. In this embodiment, the width of the front wall 1 and the rear wall 3 is set to, for example, 2000 mm, and the height of the front wall 1 and the rear wall 3 is set to, for example, 500 mm. The width and height are not limited to these values and may be determined as appropriate.

[0025] 1, a pair of connecting walls 4 are provided, spaced apart by a predetermined distance and positioned symmetrically with respect to the longitudinal center line P when viewed from above. A convex rib portion 5 protruding upward from the parallel plane Sb is provided at the upper end of each connecting wall 4, and a concave rib portion 6 recessed from the reference plane Sa is provided at the lower end of each connecting wall 4, with which the concave rib portion 5 engages. The engagement between the convex rib portion 5 and the concave rib portion 6 determines the positioning of the upper slope block B relative to the lower slope block B.

[0026] Furthermore, recesses 7 are formed on the upper surface 1c and / or lower surface 1b of the front wall 1 (upper surface 1c in the embodiment), forming gaps C (FIG. 8) in which plants can grow between the upper surface 1c of the front wall 1 and the lower surface 1b of the front wall 1 of another slope protection block stacked on this upper surface 1c. The recesses 7 are formed in the center of the upper surface of the front wall 1 and symmetrically on both sides of the front wall 1. When the depth of the recesses 7 from the upper surface of the front wall 1 is D, it is set to, for example, D = 10 mm to 30 mm. In the embodiment, D is set to 15 mm.

[0027] Further, the front wall 1 is formed with a front drain port 10 that communicates with the space E, the rear wall 3 is formed with a rear drain port 11 that communicates with the space E, and the connecting wall 4 is formed with a communication port 12 that communicates with the space E. As shown in FIGS. 4 and 9 , the front drain port 10 and the rear drain port 11 are each formed as a columnar hole through which a drain pipe HP can be inserted to discharge water on the slope side to the outside of the front wall 1 when the slope is covered. Further, the front drain port 10 and the rear drain port 11 are formed on an axis Q that slopes downward toward the front from the rear wall 3 toward the front wall 1, and the axis Q is formed so as to overlap the center line P when viewed from above. The front drain port 10 is formed in a frustum shape with its inner opening 10b larger than its outer opening 10a, and the rear drain port 11 is formed in a frustum shape with its outer opening 11a larger than its inner opening 11b. In this embodiment, the front drain outlet 10 and the rear drain outlet 11 are formed in a truncated cone shape or an oblique truncated cone shape (in this embodiment, an oblique truncated cone shape) with the lower generatrix approximately parallel to the reference plane Sa, as shown in Figures 3 and 4.

[0028] In this way, the entire slope block B is formed approximately symmetrically around the center line P, and the front drain outlet 10 and the rear drain outlet 11 can also be positioned in the center of the width direction, making it extremely well-balanced and thereby improving the appearance quality.

[0029] Furthermore, the outer opening 10a of the front drain outlet 10 is closed with a lid 20 that can be removed by hitting it with a hammer (not shown), and the surface side of the lid 20 is formed in an imitation stone shape defined by grooves G. As described above, a plurality of imitation stone-shaped protrusions 2 defined by grooves G are formed on the surface side of the front wall 1, and in particular, as shown in Figures 1 and 5, a plurality of protrusions 2 are formed around the periphery of the lid 20 so as to surround it. In this embodiment, three protrusions 2 are formed around the periphery of the lid 20. The grooves G that define the lid 20 are formed so as to be shared with the grooves G that form the protrusions 2 adjacent to the lid 20. In other words, the grooves G define the outer ring of the imitation stone.

[0030] 6 and 7, the lid 20 is configured with a surface side portion 21 and a base end portion 22, and the shape and size of the base end portion 22 of the lid 20 are formed to be the same as the shape and size of the outer opening inner edge portion 13 of the front drain outlet 10, and the base end portion 22 of the lid 20 is molded integrally and connected to the outer opening inner edge portion 13 of the front drain outlet 10. When the thickness of the base end portion 22 in the direction perpendicular to the reference surface 1a of the front wall 1 is T, T is set to 5 mm to 15 mm, and the surface side portion 21 of the lid 20 is formed to be large enough to pass through the front drain outlet 10. In this embodiment, T is 10 mm.

[0031] Next, a construction process for the slope block B according to the embodiment will be described. <When constructing so that plants grow from gap C in the front wall> As shown in Figures 1, 3, 5, 6, and 8, the required number of slope blocks B are stacked with the lids 20 left in place, and as shown in Figure 8, the space E between each slope block B is filled with filler material 30, such as crushed stone, soil, or sand, on which plants can grow. Filling can be done every few layers. Note that backfill material (not shown) is filled between the rear wall 3 of each slope block B and the slope. Note that in this case, the lids 20 are generally left in place, but this is not necessarily required; it is acceptable to remove the lids 20 and allow plants to emerge from the front drainage openings 10.

[0032] <When installing to prevent plants from growing through gap C in the front wall> As shown in FIG. 7 , the lid 20 of the necessary slope block B is removed by hitting it with a hammer. This opens the front drain outlet 10. Hitting the lid 20 with a hammer causes a crack to form at the connection between the inner edge 13 of the outer opening of the front drain outlet 10 and the base end 22, and the lid 20 separates from this area. In this case, the thickness T of the base end 22 is set to 5 mm to 15 mm, which facilitates cracking and separation, thereby improving workability. Furthermore, the surface side 21 of the lid 20 is sized to pass through the front drain outlet 10, so the separated lid 20 can pass through the front drain outlet 10 and drop from its inner opening 10b. This makes removal of the lid 20 extremely easy and reliable, thereby improving workability and workability. Furthermore, in the front drain outlet 10, the lid 20 that is separated by hitting it with a hammer moves from the outer opening 10a toward the larger inner opening 10b, making it easier to drop from this inner opening 10b, which also improves workability.

[0033] Next, as shown in FIG. 4 , in the slope block B with the cover 20 removed, drainage pipes HP are inserted through the front drain outlets 10 and the rear drain outlets 11, and a filler 31 such as mortar is filled into the front drain outlets 10 and the rear drain outlets 11 to fix the drainage pipes HP. To install the drainage pipes HP, they are inserted through the rear drain outlet 11 and then into the front drain outlet 10, protruding from the rear drain outlet 11. In this case, the tip of the drainage pipe HP is inserted through the outer opening 11a, which is larger than the inner opening 11b, in the rear drain outlet 11, and through the inner opening 10b, which is larger than the outer opening 10a, in the front drain outlet 10. This makes it extremely easy to insert the drainage pipes HP, thereby improving workability and workability. As a result, the drainage pipes HP are installed from the rear wall 3 to the front wall 1 in a downward-facing manner because the front drain outlets 10 and the rear drain outlets 11 are formed on an axis Q that slopes downward from the rear wall 3 to the front wall 1.

[0034] Then, as shown in Figure 9, the required number of slope blocks B, including the slope block B to which the drainage pipe HP is fixed, are stacked, and concrete 32 is filled into the space E. Filling can be done every few layers. In this case, the depth D of the recess 7 is set to D = 10 mm to 30 mm, so when the space E is filled with concrete, the concrete is less likely to leak from the gap C, thereby improving workability. Note that a backfill material (not shown) is filled between the rear wall 3 of each slope block B and the slope.

[0035] The slope constructed by installing the slope blocks B in this manner exhibits the following actions and effects. <When constructed so that plants grow from gap C in the front wall> As shown in Figure 8, when the slope blocks B are constructed, water supplied from the slope side through the rear drain outlet 11 flows into the filling material 30 in the space E defined by the slope blocks, and plants grow from the gap C in the front wall 1, thereby greening the wall surface. Excess water is drained from the gap C in the front wall 1. In this case, the lid 20 of the front wall 1 remains as it is, and the surface side of the lid 20 is formed into an imitation stone shape defined by the groove G. In other words, the entire surface of the front wall 1 has an imitation stone shape, so it is difficult to visually recognize the front drain outlet 10, and this, combined with the multiple imitation stone-like protrusions 2, improves the appearance and enables the appearance quality to be improved.

[0036] In particular, multiple protrusions 2 are formed surrounding the lid 20, and the groove G that divides the lid 20 is shared with the groove G that forms the protrusions 2 adjacent to the lid 20.As a result, compared to when the lid 20 is formed within the protrusions 2, the protrusions 2 and the lid 20 can each be seen as independent artificial stones, thereby improving the appearance quality.

[0037] <When constructed to prevent plants from growing through gap C in the front wall> As shown in Figure 9, when the slope block B is constructed, the space E is filled with concrete 32, which blocks the gap C in the front wall 1 and prevents plants from growing in this gap C. Moreover, in this slope block B, the front wall 1 and the rear wall 3 are spaced apart by a predetermined distance, so the thickness is large, and furthermore, concrete 32 is filled between the front wall 1 and the rear wall 3, so the strength is high and the slope can be protected extremely firmly.

[0038] In this case, when the lid 20 is removed, the tip of the drain pipe HP faces the outer opening 10a of the front drain outlet 10, but multiple protrusions 2 are formed surrounding the lid 20, and the groove G that defines the lid 20 is shared with the groove G that forms the protrusion 2 adjacent to the lid 20.Therefore, the outer opening 10a of the front drain outlet 10 does not appear to have been opened on the surface of the imitation stone-shaped protrusion 2, and the surrounding protrusions 2 appear independent and imitation stone-shaped, making the front drain outlet 10 and the opening of the drain pipe HP facing it less noticeable, thereby improving the appearance quality.

[0039] Water generated on the slope side can be drained through the drainage pipe HP. In this case, the drainage pipe HP slopes downward from the rear wall 3 to the front wall 1, which allows for smooth drainage and improves drainage performance.

[0040] In the above embodiment, one set of front drain outlet 10 and rear drain outlet 11 is provided per slope block B. However, this is not necessarily limited to this, and multiple sets may be provided. Also, in the above embodiment, one pair of connecting walls 4 is provided. However, this is not necessarily limited to this, and one, or three or more, may be provided, and modifications may be made as appropriate. Furthermore, while the front wall 1 and rear wall 3 are inclined, their inclination angle may also be determined as appropriate. For example, the front wall 1 and rear wall 3 may be formed upright and then inclined to follow the slope during construction, and modifications may be made as appropriate. Furthermore, in the above embodiment, the protrusion 2 and cover 20 are formed in an imitation stone shape, but their design may of course be determined as appropriate. The present invention is not limited to the above-described embodiment. Those skilled in the art will readily make numerous modifications to these exemplary embodiments without substantially departing from the novel teachings and effects of the present invention, and many such modifications are within the scope of the present invention. [Explanation of symbols]

[0041] B Slope block 1 front wall 1a Reference surface 1b Bottom side 1c top surface 2 Convex part G groove 3 Back wall 3a Back 3b Bottom side 3c Top surface Sa reference plane Sb parallel plane 4 Connecting wall E space P center line 5 Convex portion 6 Concave section 7. Recess C Gap 10 Front drain 10a outer opening 10b Inner opening 11 Rear drain 11a Outside opening 11b Inner opening 12 Connecting port 13 Inner edge of outer opening HP drainage pipe Q axis 20 Lid 21 Surface side 22 Proximal end 30 Filling material 31 Filling material 32 Concrete

Claims

1. A concrete slope block integrally comprising a front wall having a plurality of imitation stone-like convex portions partitioned by grooves on the surface side, a rear wall provided at a predetermined distance from the front wall, and a connecting wall connecting the front wall and the rear wall and forming a space between the front wall and the rear wall, wherein a plurality of these front walls are stacked in a continuous manner to cover a slope, a recess is formed on the upper surface and / or lower surface of the front wall to form a gap in which plants can grow between the upper surface of the front wall and the lower surface of the front wall of another slope protection block stacked on the upper surface; In a slope block, a front drainage outlet communicating with the space is formed in the front wall, and a rear drainage outlet communicating with the space is formed in the rear wall, A slope block characterized in that the front drain outlet and the rear drain outlet are each formed as columnar holes through which drainage pipes can be inserted to discharge water on the slope side to the outside of the front wall when the block is used to cover the slope, and are formed on an axis that slopes downward from the rear wall to the front wall, the outer opening of the front drain outlet is closed with a removable cover that can be struck with a hammer, and the surface side of the cover is formed in the shape of an imitation stone defined by grooves.

2. 2. A slope block according to claim 1, characterized in that a plurality of said convex portions are formed surrounding said lid, and the groove that defines said lid is shared with the groove that forms the convex portion adjacent to said lid.

3. A slope block as described in claim 2, characterized in that the lid is configured with a surface side portion and a base end portion, the shape and size of the base end portion of the lid is formed to be the same as the shape and size of the inner edge of the outer opening of the front drain outlet, the base end portion of the lid is integrally connected to the inner edge of the outer opening of the front drain outlet, when the thickness of the base end is T, T is set to 5 mm to 15 mm, and the surface side portion of the lid is formed to be large enough to pass through the front drain outlet.

4. A slope block as described in claim 3, characterized in that the front drainage outlet is formed in a frustum shape with its inner opening larger than its outer opening, and the rear drainage outlet is formed in a frustum shape with its outer opening larger than its inner opening.

5. a pair of connecting walls spaced apart at a predetermined distance from each other and positioned symmetrically about a longitudinal center line when viewed from above; a protruding ridge portion protruding upward from the parallel plane at the upper end of each connecting wall; a recessed ridge portion recessed from the reference plane at the lower end of each connecting wall with which the protruding ridge portion engages; the front drain outlet and the rear drain outlet are formed so that their axes overlap the center line when viewed from above; the recessed portions are formed in the center of the upper surface of the front wall and symmetrically on both sides of the front wall; and the depth of the recessed portions from the upper surface of the front wall is set to D, which is set to D = 10 mm to 30 mm.

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