Mounting block, weed-preventing structure, and method for constructing weed-preventing structure

Abstract

To provide a mounting block, a weed-preventing structure, and a method for constructing a weed-preventing structure, which can be easily constructed on an earth structure.SOLUTION: A mounting block 20 is placed on an earth structure 1 to suppress growth of weeds, and comprises a rectangular plate portion 21 and a plurality of protrusions 30 protruding from a main surface of the plate portion 21, the plurality of protrusions 30 extending in a first direction and arranged in a second direction perpendicular to the first direction, and is placed on the earth structure 1 with the plurality of protrusions 30 facing the surface of the earth structure 1. When viewed in a direction parallel to the first direction, the protrusions 30 have a tapered shape.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a mounting block, a weed control structure, and a method for constructing a weed control structure. [Background technology]

[0002] If earth structures such as roads and ridges constructed from embankments are left unattended, weeds will grow thickly, requiring a great deal of effort to mow them. To suppress the growth of weeds on such earth structures, various weed control structures have been proposed.

[0003] Patent document 1 discloses a weed control structure having road pavement and shoulder blocks installed on the top of an earth structure, and a weed control sheet fixed to the shoulder blocks with anchors and covering the slope of the earth structure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-307518 Summary of the Invention [Problem to be solved by the invention]

[0005] When constructing the weed control structure of Patent Document 1, it is necessary to construct road pavement and shoulder blocks on the top of the structure, and to secure the weed control sheet to the shoulder blocks using anchors, which results in a problem of time-consuming construction.

[0006] The present invention has been made to solve the above-mentioned problems, and aims to provide a mounting block, a weed control structure, and a method for constructing a weed control structure that can be easily installed on earth structures. [Means for solving the problem]

[0007] The mounting block of the present invention is a mounting block that is placed on an earth structure and suppresses the growth of weeds, and is equipped with a rectangular plate portion and a plurality of protrusions protruding from the main surface of the plate portion, the plurality of protrusions extending in a first direction and arranged in a second direction perpendicular to the first direction, and is placed on the earth structure with the plurality of protrusions facing toward the surface of the earth structure.

[0008] The protrusion may have a tapered shape when viewed in a direction parallel to the first direction.

[0009] The protrusions may be disposed on both ends in the second direction.

[0010] The protrusion may include a first protrusion and a second protrusion that protrudes less from the plate portion than the first protrusion.

[0011] The earth structure may be a levee having a top and a slope, or a river bank.

[0012] The weed control structure according to the present invention comprises the above-mentioned placement block placed on the top end of the earth structure, and a weed control sheet covering the slope of the earth structure.

[0013] The placing blocks may be arranged in a predetermined direction without gaps on the top of the earth structure, and may further include a joint that covers the area where the placing blocks are adjacent to each other.

[0014] The weed control sheet may comprise a first weed control sheet laid on one of the slopes on both sides of the earth structure, and a second weed control sheet laid on the other slope, and the upper edge of the first weed control sheet and the upper edge of the second weed control sheet may be sandwiched between the placement block and the top of the earth structure.

[0015] The construction method for a weed-control structure according to the present invention comprises the steps of laying a weed-control sheet on the slope of the earth structure, and placing the placement block on the top of the earth structure and sandwiching the weed-control sheet between the block and the earth structure. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a mounting block, a weed control structure, and a method for constructing a weed control structure that can be easily constructed on an earth structure. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view of a weed control structure according to an embodiment of the present invention. FIG. [Figure 2] 1 is a cross-sectional view of a weed control structure according to an embodiment of the present invention. [Figure 3] FIG. 2 is a front view of the mounting block according to the embodiment of the present invention. [Figure 4] 1A to 1B are cross-sectional views illustrating a construction method for a weed-control structure according to an embodiment of the present invention, showing construction steps ((a) to (b)). [Figure 5] 1 is a cross-sectional view showing a state in which a mounting block according to an embodiment of the present invention is installed on a slope of an earth structure. [Figure 6] FIG. 10 is a side view of a weed control structure according to another embodiment of the present invention. [Figure 7] 7A and 7B are diagrams of the joint shown in FIG. 6, in which (a) is a front view and (b) is a bottom view seen from the arrow b in (a). DETAILED DESCRIPTION OF THE INVENTION

[0018] The following describes a mounting block, a weed control structure, and a construction method for a weed control structure according to an embodiment of the present invention, with reference to the drawings. As shown in FIGS. 1 and 2, a weed control structure 10 suppresses the growth of weeds on an earth structure 1 constructed by filling soil. The earth structure 1 is, for example, a levee built in a rural area. The earth structure 1 has a top 2 and slopes 3 on both sides of the top 2. When distinguishing between the left and right slopes 3 shown in FIG. 2, the left side in the figure is referred to as the first slope 3a, and the right side in the figure is referred to as the second slope 3b. Also, as shown in FIG. 1, the transverse direction of the earth structure 1 is defined as the X-axis direction, the longitudinal direction of the earth structure 1 is defined as the Y-axis direction, and the Z-axis direction perpendicular to the X-axis and Y-axis directions is defined as the Z-axis direction. The explanation will be made with reference to these directions as appropriate. The X-axis and Y-axis directions are mutually perpendicular in the horizontal direction, and the Z-axis direction coincides with the height direction.

[0019] The weed control structure 10 comprises a mounting block 20 placed on the top 2 of the earth structure 1, and weed control sheets 41, 42 laid on the slope 3 of the earth structure 1.

[0020] The mounting block 20 is a concrete product, and as shown in FIG. 2, has a plate portion 21 and a plurality of protrusions 30 protruding from the plate portion 21. The planar shape of the mounting block 20 is, for example, a square. The mounting block 20 has a width sufficient to cover the top 2 of the earth structure 1, and the length L of one side (FIG. 1) is, for example, 500 mm. The thickness t (FIG. 3) of the plate portion 21 of the mounting block 20 is, for example, 60 mm.

[0021] 3, the multiple protrusions 30 protrude downward from the lower surface 21a, which is one of the main surfaces of the plate portion 21. The multiple protrusions 30 include first protrusions 31, 32 that protrude a large amount, and a second protrusion 33 that protrudes a smaller amount than the first protrusions 31, 32.

[0022] When viewed in a direction parallel to the Y axis, the first protrusions 31 and 32 have a substantially triangular protrusion 31 having a substantially isosceles triangle shape and a trapezoidal protrusion 32 having a trapezoid shape.

[0023] The approximately triangular protrusion 31 extends in the Y-axis direction, which is the first direction, and its shape and size are constant in the Y-axis direction. Three approximately triangular protrusions 31 are arranged on the mounting block 20 at intervals in the X-axis direction, which is the second direction. The approximately triangular protrusion 31 has a shape like an isosceles triangle with its base 31a aligned with the lower surface 21a of the plate portion 21, and the apex where a pair of equal sides 31b, 31b intersect is horizontally cut. The apex angle θ1 of the approximately triangular protrusion 31 is, for example, between 45 degrees and 65 degrees, and preferably 55 degrees. The protrusion length L1 from the plate portion 21 to the tip 31c is 50 mm. The width W1 of the tip 31c is 5 mm. The approximately triangular protrusion 31 thus formed has a shape that tapers downward (in the -Z direction).

[0024] The trapezoidal protrusions 32 are provided at both ends of the plate portion 21 on the +X and -X sides. The two trapezoidal protrusions 32 are configured symmetrically with respect to the center line CL extending along the Y axis, so only the configuration of the trapezoidal protrusion 32 on the -X side will be described. The upper base 32a of the trapezoidal protrusion 32 coincides with the lower surface 21a of the plate portion 21, and the shorter lower base 32b is located below the upper base 32a (in the -Z direction). One leg 32c of the trapezoidal protrusion 32 coincides with an extension of the line representing the -X side end face of the plate portion 21, and the interior angle formed by the leg 32c and the upper base 32a is 90 degrees. The other leg 32d of the trapezoidal protrusion 32 is a hypotenuse that extends downward toward the -X side.

[0025] The trapezoidal protrusion 32 extends in the Y-axis direction, and its shape and size are constant in the Y-axis direction. The trapezoidal protrusion 32 has a protrusion length L2 of 50 mm from the lower surface 21a of the plate portion 21 to the lower base 32b. The width W2 of the lower base 32b of the trapezoidal protrusion 32 is 9 mm, which is larger than the width W1 (5 mm) of the tip 31c of the approximately triangular protrusion 31. As such, the first protrusions 32 provided at both ends have a wider tip width than the first protrusion 31 provided in the middle portion, and are therefore referred to as trapezoidal protrusions 32 having a different shape from the approximately triangular protrusion 31. The trapezoidal protrusion 32 formed in this manner has a shape that tapers downward (in the -Z direction).

[0026] As shown in FIG. 3 , the second protrusion 33 has a substantially isosceles triangular shape when viewed from a direction parallel to the Y-axis. Specifically, the second protrusion 33 has a shape such that the base 33a of the isosceles triangle is aligned with the lower surface 21a of the plate portion 21, and the apex where the pair of equal sides 33b intersects is horizontally cut. The second protrusions 33 extend in the Y-axis direction and are disposed between the first protrusions 31 and 32. The shape and size of the second protrusions 33 are constant in the Y-axis direction. The apex angle θ2 of the second protrusions 33 is, for example, between 45 degrees and 65 degrees, preferably 55 degrees, and the protrusion length L3 from the lower surface 21a of the plate portion 21 to the tip 33c is 40 mm. The width W3 of the tip 33c in the X-axis direction is 5 mm. The second protrusions 33 thus formed have a shape that tapers downward (in the −Z direction).

[0027] As described above, trapezoidal protrusion 32 is provided at the end on the -X side of plate portion 21, and second protrusions 33 and approximately triangular protrusions 31 are provided alternately with gaps W4 from that portion to the +X side. Trapezoidal protrusion 32 is also provided at the end on the +X side of plate portion 21. Gap W4 provided between each protrusion is, for example, 14 mm.

[0028] The weed control sheets 41, 42 are preferably selected from sheets that can suppress the growth of weeds while leaving the roots of the weeds intact even after they are laid on the earth structure 1. For example, sheets that block sunlight and allow water to pass through are used for the weed control sheets 41, 42. Specifically, weed control sheets manufactured by Nippon Wide Cross Co., Ltd. can be used, but other sheets that have the above-mentioned functions can also be used.

[0029] As shown in Figures 1 and 2, weed control sheets 41 and 42 are respectively laid on a first slope 3a and a second slope 3b provided on both sides of the earth structure 1. The weed control sheet 41, which is the first weed control sheet on the left side of the figure, covers the first slope 3a, and its upper edge 41a covers part of the top edge 2 of the earth structure 1. The weed control sheet 42, which is the second weed control sheet on the right side of the figure, covers the second slope 3b, and its upper edge 42a covers part of the top edge 2 of the earth structure 1. The upper edge portions 41a and 42a of the weed control sheets 41 and 42 laid on both sides of the earth structure 1 are sandwiched between the trapezoidal protrusion 32 of the mounting block 20 placed on the top edge 2 and the top edge 2 of the earth structure 1. The lower edge portions 41b and 42b of the weed control sheets 41 and 42 are fixed by driving U-pins 44 inserted into washers 43 into the earth structure 1. A plurality of washers 43 and U-pins 44 are provided at intervals in the Y-axis direction. By fixing the upper edge portions 41a, 42a and the lower edge portions 41b, 42b of the weed control sheets 41, 42 in this manner, it is possible to maintain the weed control sheets 41, 42 covering the first slope 3a and the second slope 3b.

[0030] Next, a method for constructing the weed-control structure 10 will be described.

[0031] First, as shown in Figure 4(a), a weed control sheet 41 is laid to cover the first slope 3a and part of the top edge 2 on the left side of the earth structure 1, and a weed control sheet 42 is laid to cover the second slope 3b and part of the top edge 2 on the right side of the figure. The weed control sheets 41 and 42 are laid to the required length in the direction in which the earth structure 1 extends (the Y-axis direction). In this case, if one sheet is not enough, multiple sheets are laid in the Y-axis direction, with some of them overlapping.

[0032] Next, the U-pin 44 inserted through the washer 43 is driven into the weed control sheets 41, 42 laid on the earth structure 1. This allows the lower edge portions 41b, 42b of the weed control sheets 41, 42 to be fixed to the earth structure 1, as shown in Figure 4(b).

[0033] Next, the mounting block 20 is placed on the top 2 of the earth structure 1 with the multiple protrusions 30 facing downward. At this time, the upper edges 41a, 42a of the weed control sheets 41, 42 are sandwiched between the trapezoidal protrusions 32 provided on both the left and right ends of the mounting block 20 in the figure and the top 2 of the earth structure 1. The mounting block 20 is placed without any gaps in the direction in which the earth structure 1 extends (the Y-axis direction). This completes the construction of the weed control structure 10.

[0034] As described above, in the weed control structure 10 according to this embodiment, the first protrusions 31, 32, which have a large protrusion amount, and the second protrusion 33, which has a small protrusion amount, are arranged on the underside of the mounting block 20. This allows only the first protrusions 31, 32, which have a large protrusion amount, to penetrate into the top edge 2 of the earthen structure 1. As a result, as shown in FIG. 2, a space 50 in which weeds can grow can be secured between the mounting block 20 and the top edge 2 of the earthen structure 1. Meanwhile, external light is blocked by the mounting block 20 and does not enter the space 50. This suppresses weed growth while leaving the roots of the weeds intact. This prevents the soil of the earthen structure 1 from eroding and the earthen structure 1 from collapsing.

[0035] Furthermore, by cutting the tips of the multiple protrusions 30 horizontally, it is easy to ensure a sufficient contact area for the mounting block 20. This allows only a portion of the multiple protrusions 30 to penetrate into the earth structure 1, making it easy to ensure a space 50 in which weeds can grow.

[0036] Furthermore, the trapezoidal protrusions 32, which are provided at both ends of the +X side and -X side of the mounting block 20 and have a width W2 set wider than the widths W1 and W3, allow the weed control sheets 41, 42 laid on the earth structure 1 to be sandwiched between the top edge 2 and the weed control sheets 41, 42, and the upper edge portions 41a, 42a of the weed control sheets 41, 42 can be easily fixed in place. This makes it easy to install the weed control structure 10.

[0037] Furthermore, the amount of protrusion of the trapezoidal protrusion 32 is made larger than the amount of protrusion of the second protrusion 33, thereby increasing the force with which the trapezoidal protrusion 32 presses against the top edge 2. This allows the upper edge portions 41a, 42a of the weed control sheets 41, 42 to be securely fixed to the earth structure 1.

[0038] Furthermore, the weed control sheets 41, 42 are selected from sheet materials that can suppress the growth of weeds while leaving their roots intact even after they are laid on the earth structure 1. This makes it possible to prevent the soil of the earth structure 1 from eroding and the earth structure 1 from collapsing.

[0039] Furthermore, the mounting block 20 has planar dimensions of 500 mm x 500 mm and can be carried by one person or a small number of people, so that the mounting block 20 can be easily installed.

[0040] The present invention is not limited to the above embodiment and can be modified and applied in various ways. In the above embodiment, three triangular protrusions 31 and four second protrusions 33 are arranged in the transverse direction of the mounting block 20. However, the number of the protrusions 30 is not particularly limited. Furthermore, the dimensions of the protrusions 30 are not limited to the above dimensions. For example, the protrusion lengths L1, L2, and L3 of the first protrusions 31, 32 and the second protrusions 33 may be changed to increase or decrease the difference between the protrusion lengths of the first protrusions 31, 32 and the second protrusions 33. Furthermore, the number of the protrusions 30 may be increased or decreased compared to the above embodiment, thereby changing the size of the gap W4 between the protrusions, or a configuration without a gap W4 may be employed. Furthermore, the widths W1, W2, and W3 of the tips of the protrusions 30 may be increased or decreased relative to the above dimensions. Alternatively, the widths W1, W2, and W3 may be set to zero, resulting in sharpened tips of the protrusions 30. The narrower the width W2, the more the trapezoidal protrusion 32 becomes a right-angled triangle. On the other hand, the wider the widths W1 and W3, the more the first protrusion 31 and the second protrusion 33 become a trapezoid.

[0041] For example, the protrusion length L3 of the second protrusion 33 may be set to 25 mm, which is smaller than that of the above embodiment, thereby increasing the difference between the protrusion lengths L1 and L2 of the first protrusions 31 and 32. Alternatively, the protrusion length L3 of the second protrusion 33 may be set to a smaller value, such as 25 mm, and the number of substantially triangular protrusions 31 may be reduced to two rows and the number of second protrusions 33 may be reduced to three rows, thereby increasing the gap W4 between the multiple protrusions 30 (for example, 40 mm). Alternatively, the protrusion lengths L1, L2, and L3 of the protrusions 31, 32, and 33 may be set to the same as in the above embodiment, and the number of substantially triangular protrusions 31 may be reduced to two rows and the number of second protrusions 33 may be reduced to three rows, thereby increasing the gap W4 between the multiple protrusions 30 (for example, 34 mm). While the apex angles θ1 and θ2 of the multiple protrusions 30 have been described as being between 45 degrees and 65 degrees, for example, they may be set to angles outside this range depending on the installation location.

[0042] Furthermore, the planar dimensions of the mounting block 20 are not limited to 500 mm x 500 mm and can be changed as appropriate to fit the size of the earth structure 1 to be installed. The planar shape is also not limited to a square and may be a rectangle. By further increasing the planar dimensions, reinforcing steel bars may be provided on the mounting block 20.

[0043] In addition, a joint material may be applied between adjacent mounting blocks 20. This makes it possible to prevent weeds from growing between the adjacent mounting blocks 20.

[0044] Furthermore, although it has been explained that the lower edge portions 41b, 42b of the weed control sheets 41, 42 are fixed to the earth structure 1 using the washers 43 and U-pins 44, other fixing methods may also be used. For example, they may be fixed using nail-like fasteners or anchor pins, or weights may be attached to the lower edge portions 41b, 42b to prevent them from lifting up.

[0045] Although the embodiment has been described in which separate weed control sheets 41, 42 are laid on the first slope 3a and the second slope 3b on both sides of the earth structure 1, a weed control sheet may be laid that entirely covers the first slope 3a, the top edge 2, and the second slope 3b. This allows the weed control sheet to be laid also below the mounting block 20.

[0046] In the above embodiment, the earth structure 1 on which the weed control structure 10 is installed is described as a rice levee. However, the weed control structure 10 may be installed on other earth structures, such as the crest of a river embankment, a park, a school, a golf course, or private land (for approaches). Alternatively, the mounting blocks 20 may be installed not only on the crest 2 of the earth structure 1, but also on the slope of a rice levee, the slope of a river embankment, or the slope of a road. For example, FIG. 5 shows a road 80 in which pavement 60 and pavement stop blocks 70 are laid on the crest 2 of the earth structure 1, which is an embankment. The pavement stop blocks 70 are installed on the edge of the crest 2 of the earth structure 1, and the mounting blocks 20 are placed on the slope 3 of the earth structure 1 without leaving any gaps between them. In this case, the mounting blocks 20 are installed on the slope 3 with the extension direction of the multiple protrusions 30 aligned with the extension direction of the earth structure 1, which is an embankment. This allows the multiple protrusions 30 to dig into the slope 3, preventing the mounting blocks 20 from slipping off the slope 3. Even if the mounting blocks 20 are installed on the slope 3 of an embankment or the like, the growth of weeds on the slope 3 can be suppressed for the same reasons as described above. The mounting blocks 20 do not need to cover the entire slope 3, and may be installed only near the pavement 60 where it is desired to suppress the growth of weeds. For example, although the mounting blocks 20 are installed in two rows in FIG. 5, the number of rows in which the mounting blocks 20 can be installed is arbitrary.

[0047] Furthermore, the mounting block 20 is not limited to being made of concrete, but may be made of other materials. For example, the mounting block 20 may be made of steel, synthetic resin, or rubber.

[0048] In the above embodiment, the first protrusions 31, 32 and the second protrusion 33 have different protrusion lengths. However, the protrusion lengths may be the same. Even in this case, by ensuring a sufficient protrusion length for each of the protrusions 31, 32, 33, only a portion (the tip end) of the protrusions 31, 32, 33 can penetrate into the top edge 2 of the earthen structure 1. This allows a space 50 for weed growth to be secured between the mounting block 20 and the top edge 2 of the earthen structure 1, as in the case shown in FIG. 2. Alternatively, the protrusions sandwiched between the trapezoidal protrusions 32 on both sides of the mounting block 20 (the approximately triangular protrusions 31 and the second protrusions 33 in the above embodiment) may be set to any protrusion length as long as it does not exceed the protrusion length of the trapezoidal protrusions 32. The protrusions sandwiched between the trapezoidal protrusions 32 may all have the same protrusion length, which is smaller than the trapezoidal protrusions 32, or may have different protrusion lengths. In this way, by not exceeding the protrusion amount of the trapezoidal protrusion portion 32 , it is possible to easily sandwich the weed control sheet 42 between the trapezoidal protrusion portion 32 and the top edge 2 of the earth structure 1 .

[0049] Furthermore, in the above embodiment, construction of the weed control structure 10 was completed by arranging the mounting blocks 20 without any gaps in the direction in which the earth structure 1 extends (Y-axis direction), but this process may be further supplemented with a step of attaching joints that connect adjacent mounting blocks. A weed control structure 150 according to another example of this embodiment will now be described with reference to Figures 6, 7(a) and 7(b). As shown in Figure 6, the weed control structure 150 has joints 100 attached to adjacent mounting blocks 120 to suppress the growth of weeds between the mounting blocks 120.

[0050] As shown in Fig. 6, two grooves 110a and 110b extending in the X-axis direction are formed on the top surface of the mounting block 120. The grooves 110a and 110b are parallel to each other. When the mounting block 120 is viewed from above, the groove 110a is formed near the edge on the +Y side of the mounting block 120, and the groove 110b is formed near the edge on the -Y side of the mounting block 120. The grooves 110a and 110b are formed across the entire width of the mounting block 120 in the X-axis direction. When the grooves 110a and 110b are cut perpendicular to the longitudinal direction (X-axis direction), the cross section is rectangular, and the shape and size of the cross section are consistent in the X-axis direction.

[0051] Joint 100 is made of rubber and has an inserting portion 101 that is inserted into groove 110b, an inserting portion 102 that is inserted into groove 110a, and a connecting portion 103 that connects inserting portion 101 and inserting portion 102 together.

[0052] As shown in FIG. 7(a), the insertion portion 101 protrudes downward from the lower surface of the connection portion 103. As shown in FIG. 7(b), the insertion portion 101 extends in the X-axis direction, and its length in the X-axis direction is the same as the width of the mounting block 120 in the X-axis direction. As shown in FIG. 7(a), the insertion portion 101 has multiple protrusions 104 protruding from the side surface on the +Y side. The protrusions 104 are inclined obliquely upward (with their tips tilted toward the +Z side from a state parallel to the Y axis (horizontal)). The insertion portion 101 also has multiple protrusions 105 protruding from the side surface on the -Y side. The protrusions 105 are inclined obliquely upward (with their tips tilted toward the +Z side from a state parallel to the Y axis (horizontal)). When the insertion portion 101 is inserted into the groove 110a, the protrusions 104 and 105 come into contact with the inner wall of the groove 110a. Even if a force acts on the insertion portion 101 in this state to cause it to slip out of the groove 110a, the protrusions 104 and 105 come into contact with the inner wall of the groove 110a, resisting the insertion portion 101 from slipping out of the groove 110a. In this way, the protrusions 104 and 105 prevent the inserted insertion portion 101 from easily slipping out of the groove 110a. The insertion portion 102 has the same configuration as the insertion portion 101 and includes the protrusions 104 and 105.

[0053] The connecting portion 103 is a sheet-like member that connects the insertion portion 101 and the insertion portion 102. The connecting portion 103 covers the gap between adjacent mounting blocks 120, blocking sunlight and suppressing the growth of weeds. The connecting portion 103 has an expandable portion 103a extending in the X-axis direction at its center. As shown in FIG. 7(a), the expandable portion 103a has a downwardly convex V-shape when viewed parallel to the X-axis direction, and is formed with the same shape in the X-axis direction. The expandable portion 103a is formed at a position corresponding to the boundary between adjacent mounting blocks 120. As a result, even if the gap between adjacent mounting blocks 120 widens, the expandable portion 103a expands to follow the displacement of the mounting block 120, preventing the joint 100 from coming off the mounting block 120. Note that the expandable portion 103a is not limited to this shape and may have, for example, an upwardly convex, arch-like shape.

[0054] In this way, by attaching joints 100 to the locations where the mounting blocks 120 are adjacent to each other, it is possible to block sunlight and suppress the growth of weeds between the mounting blocks 120. Furthermore, the joints 100 are detachable by inserting and removing the insertion parts 101, 102 into the grooves 110a, 110b. This makes it easy to repair the weed control structure 150 by removing the joints 100 and then attaching the joints 100 after the repairs are complete.

[0055] Although the attachment / detachment means for joint 100 has been described using grooves 110a and 110b and insertion portions 101 and 102 inserted into grooves 110a and 110b as an example, the attachment / detachment means is not limited to this. For example, the attachment / detachment means may be configured to form a plurality of columnar protrusions on joint 100 and insert these protrusions into grooves 110a and 110b for attachment, or to form holes in mounting block 120 corresponding to the columnar protrusions and fit the columnar protrusions into the holes to attach joint 100.

[0056] The present disclosure allows various embodiments and modifications without departing from the broad spirit and scope of the present disclosure. Furthermore, the above-described embodiments are intended to explain the present disclosure and do not limit the scope of the present disclosure. That is, the scope of the present disclosure is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and the meaning of equivalent disclosures are considered to be within the scope of the present disclosure. [Explanation of symbols]

[0057] 1: earth structure, 2: top edge, 3: slope, 3a: first slope, 3b: second slope, 10: weed control structure, 20: mounting block, 21: plate portion, 21a: underside, 30: multiple protrusions, 31: first protrusion (approximately triangular protrusion), 31a: base, 31b: equilateral, 31c: tip, 32: first protrusion (trapezoidal protrusion), 32a: upper base, 32b: lower base, 32c, 32d: legs, 33: second protrusion, 33a: base, 33b: equilateral, 33c: tip, 41: weed control sheet, 41a: upper edge, 41b: lower edge , 42: weed control sheet, 42a: upper edge, 42b: lower edge, 43: washer, 44: U-pin, 50: space, 60: pavement, 70: pavement stop block, 80: road, 100: joint, 101, 102: insertion part, 103: connection part, 103a: expansion part, 104, 105: protrusion part, 110a, 110b: groove part, 120: mounting block, 150: weed control structure, θ1, θ2: apex angle, L: length of one side, L1, L2, L3: protrusion length, CL: center line, W1, W2, W3: width, W4: gap, t: thickness

Claims

1. A mounting block that is placed on an earth structure and suppresses the growth of weeds, a rectangular plate portion; a plurality of protrusions protruding from the main surface of the plate portion, The plurality of protrusions extend in a first direction and are arranged in a second direction perpendicular to the first direction, The earth structure is placed on the earth structure with the plurality of protrusions facing the surface of the earth structure. Mounting block.

2. The protrusion has a tapered shape when viewed in a direction parallel to the first direction. The mounting block according to claim 1 .

3. The protrusions are disposed at both ends in the second direction. The mounting block according to claim 1 .

4. The protrusion includes a first protrusion and a second protrusion that protrudes less from the plate than the first protrusion. The mounting block according to claim 1 .

5. The earth structure is a levee or a river bank having a top and a slope. The mounting block according to claim 1 .

6. The block according to any one of claims 1 to 5, which is placed on the top of the earth structure; and a weed-proof sheet covering the slope of the earth structure. Weed control structure.

7. The placing blocks are arranged without gaps in a predetermined direction at the top of the earth structure, The mounting blocks further include a joint that covers the area where the mounting blocks are adjacent to each other. The weed control structure according to claim 6.

8. The weed control sheet includes a first weed control sheet laid on one of the slopes on both sides of the earth structure, and a second weed control sheet laid on the other slope, an upper edge portion of the first weed control sheet and an upper edge portion of the second weed control sheet are sandwiched between the placement block and the top edge of the earth structure; The weed control structure according to claim 6.

9. laying a weed control sheet on a slope of the earth structure; and placing the placement block according to any one of claims 1 to 5 on the top end of the earth structure and sandwiching the weed control sheet between the placement block and the earth structure. How to construct weed control structures.

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