JP7002884B2 - Revetment block and revetment structure - Google Patents

Description

The present invention relates to a revetment block and a revetment structure constructed by using the revetment block.

Later Patent Document 1 is provided with a hollow portion from the upper surface to the lower surface in the center between the front surface and the rear surface, and recesses extending from the upper surface to the lower surface are provided on both sides thereof, and the hollow portion and the recess on the upper surface are excluded. A concrete block (hereinafter, simply referred to as a block) in which a fitting protrusion is provided in a portion and a fitting recess is provided in a portion other than a hollow portion and a recess on the lower surface is disclosed. In this block, the fitting recesses of the upper block are fitted into the fitting protrusions of the lower block, the blocks are stacked along the surface of the backing material, and concrete is placed in the hollow portions and recesses of the stacked blocks. It is constructed by filling.

However, when the upper block is stacked on the lower block, the block needs to be fitted while aligning the fitting recess of the upper block with the fitting projection of the lower block. This fitting work is difficult even for a skilled person because even a small block has a mass of several hundred kg. That is, it cannot be said that the blocks have good workability because the labor and time required for stacking the blocks are large.

JP-A-2017-106233

The problem to be solved by the present invention is to provide a revetment block that can reduce labor and time for stacking to improve workability, and a revetment structure that can be constructed under high workability by using this revetment block. It is in.

In order to solve the above problems, the revetment block according to the present invention is a revetment block that can be stacked in multiple stages, and is a front plate portion, a rear plate portion provided behind the front plate portion, and the front plate portion. The front plate portion is provided with a connecting plate portion for forming a vertical gap between the front plate portion and the rear plate portion, and the outer shape of the front plate portion is rectangular, and the front plate portion is larger than the upper surface of the connecting plate portion. It has a first overhanging portion that overhangs upward, the outer shape of the rear plate portion is rectangular, and the rear plate portion overhangs below the lower surface of the connecting plate portion, and the first overhanging portion. A second overhanging portion having the same vertical dimension as the protruding portion is provided, and a support portion having the same vertical dimension as the second overhanging portion is provided on the lower surface of the connecting plate portion . A support portion for supporting the lower surface of the revetment block is provided, and the second overhanging portion and the support portion of the rear plate portion of the revetment block can be combined with the first plate portion of the front plate portion of the revetment block on the lower stage side. By inserting it on the rear side of the overhanging portion, the revetment block can be stacked on the lower revetment block.

On the other hand, the revetment structure according to the present invention is a revetment structure constructed by stacking the above-mentioned revetment blocks in multiple stages along the surface of the backing material layer, and the revetment block on the upper stage side is the rear plate portion. The second overhang and the support 14 are inserted behind the first overhang of the front plate of the lower revetment block, and the lower surface of the support is the upper surface of the connecting plate of the lower revetment block. It is piled up so as to be in contact with the revetment block, and a concrete part is provided in the gap between each of the multi-tiered revetment blocks.

According to the present invention, it is possible to provide a revetment block that can reduce labor and time for stacking to improve workability, and a revetment structure that can be constructed under high workability by using the revetment block.

FIG. 1 (A) is a front view of the revetment block to which the present invention is applied, FIG. 1 (B) is a rear view of the revetment block, and FIG. 1 (C) is a view of the revetment block from the right side. FIG. 1 (D) is a view of the revetment block from above, FIG. 1 (E) is a view of the revetment block from below, and FIG. 1 (F) is the S1-S1 line of FIG. 1 (A). It is a sectional view. FIG. 2 is a vertical sectional view of a revetment structure to which the present invention is applied. 3 (A) and 3 (B) are views showing the stacked arrangement of the revetment blocks when the revetment structure shown in FIG. 2 is viewed from the front. FIG. 4 is an explanatory diagram of an example of a construction method of the revetment structure shown in FIG. FIG. 5 is an explanatory diagram of an example of a construction method of the revetment structure shown in FIG. FIG. 6 is an explanatory diagram of an example of a construction method of the revetment structure shown in FIG. FIG. 7 is an explanatory diagram of an example of a construction method of the revetment structure shown in FIG. FIG. 8 is an explanatory diagram of an example of a construction method of the revetment structure shown in FIG. 9 (A) is a correspondence diagram of FIG. 1 (D) showing a modified example of the revetment block shown in FIG. 1, and a corresponding diagram of FIG. 1 (E) showing the modified example.

First, the configuration of the revetment block 10 to which the present invention is applied will be described with reference to FIG. In this description, for convenience, the left side of FIG. 1C is referred to as front, the right side is referred to as rear, the back side is referred to as left, the front side is referred to as right, the upper side is referred to as upper, and the lower side is referred to as lower. Indicate the orientation according to. In addition, the notations such as "same dimensions", "parallel surfaces", "same angle", "floating", "constant thickness", "matching dimensions", and "right angle" in this explanation are designed. It is a convenience based on the above standard dimensions, and if manufacturing tolerances are included, it may actually differ within the tolerances.

The revetment block 10 shown in FIG. 1 is a precast concrete block including a front plate portion 11, a rear plate portion 12, two connecting plate portions 13, and two support portions 14. As shown in FIGS. 1D and 1E, the two connecting plate portions 13 play a role of connecting the front plate portion 11 and the rear plate portion 12, and also the front plate portion 11 and the rear portion. It plays a role of forming three gaps GA in the vertical direction between the plate portion 12 and the plate portion 12. Although the revetment block 10 has an internal reinforcing bar, its illustration is omitted in FIG. 1 (F).

As shown in FIGS. 1 (A) and 1 (B), the outer shape of the front plate portion 11 and the outer shape of the rear plate portion 12 are both rectangular, and the left-right dimension W11 of the front plate portion 11 and the rear The horizontal dimension W12 of the plate portion 12 is the same, and the vertical dimension H11 of the front plate portion 11 and the vertical dimension H12 of the rear plate portion 12 are the same. Further, as shown in FIG. 1C, the front plate portion 11 and the rear plate portion 12 are tilted backward at the same angle θ, and the front surface of the front plate portion 12 and the rear surface of the rear plate portion 13 are parallel to each other. be.

Further, as shown in FIGS. 1 (A) to 1 (C) and FIG. 1 (F), the upper portion of the front plate portion 11 is a first overhanging portion that projects upward from the upper surface of each connecting plate portion 13. It is 11a, and the lower part of the rear plate portion 12 is the second overhanging portion 12a protruding below the lower surface of each connecting plate portion 13, and the vertical dimensions H11a and the first of the first overhanging portion 11a. 2 The vertical dimension H12a of the overhanging portion 12a is the same.

Further, as shown in FIGS. 1 (A) and 1 (C) to 1 (F), the front surface of the front plate portion 11 has a rectangular outer shape, and a rock surface pattern or stone is formed on the surface. A plurality of decorative parts 1b (12 in total in the drawing) with skin patterns and the like are provided so as to be lined up in the left-right direction and the up-down direction with a gap. As can be seen from FIG. 1A, the left-right dimensions of the decorative portions 11b arranged in the left-right direction are not the same so that the positions of the left-right gaps are displaced in the up-down direction. That is, the plurality of decorative portions 11b provided on the front surface of the front plate portion 11 are in such a mode that a landscape like a stone wall can be obtained.

Further, as shown in FIGS. 1C and 1F, the front plate portion 11 has an upper surface and a lower surface parallel to each other, and the rear plate portion 12 also has an upper surface and a lower surface parallel to each other. Each connecting plate portion 13 also has an upper surface and a lower surface parallel to each other. Further, as shown in FIGS. 1C and 1F, the lower surface of the front plate portion 11 is flush with the lower surface of each connecting plate portion 13, and the upper surface of the rear plate portion 12 is flush with each connecting plate portion. It is flush with the upper surface of 13, and the lower surface of the rear plate portion 12 is flush with the lower surface of each support portion 14. Further, as shown in FIG. 1 (D), the left-right center of the connecting plate portion 13 in the left-right direction is located at the position of "1/4 of the left-right dimension W11" from the left end of the front plate portion 11, and the right-right connecting plate portion is formed. The center of the portion 13 in the left-right direction is located at the position of "1/4 of the left-right dimension W11" from the right end of the front plate portion 11.

Further, as shown in FIGS. 1C and 1E, the thickness of the front plate portion 11 is constant at the upper portion including the first overhanging portion 11a and excluding the upper portion (thickness portion 11c). ) Is increasing downward. This change in thickness is a consideration for adjusting the position of the center of gravity, which will be described later, and also plays a role in improving the rigidity of the front plate portion 11. Further, as shown in FIGS. 1C to 1E, a reinforcing portion 13a having a trapezoidal cross-sectional shape is formed on the front plate side 13a of each connecting plate portion 13. The reinforcing portion 13a is a consideration for adjusting the position of the center of gravity, which will be described later, and also plays a role of strengthening the connection between each connecting plate portion 13 and the front plate portion 11. Further, as shown in FIGS. 1 (C) and 1 (F), a connecting hole 13b having a trapezoidal vertical cross-sectional shape communicating with the gap GA is formed in each connecting plate portion 13 in the left-right direction. There is. In each connecting plate portion 13, the vertical cross-sectional type connecting hole 13b is adopted so that the vertical cross-sectional area of the lower portion of the connecting hole 13b is larger than the vertical cross-sectional area of the upper portion. Is.

Further, as shown in FIGS. 1 (C) and 1 (E), each support portion 14 has a left-right dimension slightly larger than the left-right dimension of each connecting plate portion 13, or each connecting plate portion 13. It has the same left-right dimensions as the left-right dimensions. Further, as shown in FIG. 1C, the vertical dimension of each support portion 14 is the same as the vertical dimension H12a of the second overhanging portion 12a. Further, as shown in FIG. 1C, the front-rear direction dimension of the upper surface of each support portion 14 is the first overhang from the front -rear direction dimension of the front surface of the front plate portion 11 and the front surface of the rear plate portion 12. It corresponds to the dimension obtained by subtracting the thickness of the portion 11a, and the anteroposterior dimension of the lower surface of each support portion 14 is slightly smaller than the anteroposterior dimension of the upper surface of each support portion 14. Specifically, although the rear surface of each support portion 14 is inclined backward at an angle θ, the front surface 14a of each support portion 14 forms a right angle with the upper surface and the lower surface of each support portion 14.

For reference, the specifications of the shore protection block on which FIG. 1 is based are such that the left-right dimension W11 of the front plate portion 11 and the left-right dimension W12 of the rear plate portion 12 are 1250 mm, and the vertical dimension H11 of the front plate portion 11. The vertical dimension H12 of the rear plate portion 12 is 800 mm, the vertical dimension H11a of the first overhanging portion 11a and the vertical dimension H12a of the second overhanging portion 12a are 100 mm, and the front surface and the rear plate portion 12 of the front plate portion 11 The dimension D10 in the front-rear direction with respect to the rear surface is 330 mm, the thickness of each decorative portion 11b is 50 mm, the inclination angle θ between the front plate portion 11 and the rear plate portion 12 is 63.4 degrees, and the mass is 380 kg.

Here, the position of the center of gravity of the revetment block 10 will be described. Generally, when constructing a revetment structure, the revetment block is carried to the site before or during construction and stored, but from the viewpoint of storage space, a revetment block that can stand on its own is more effective in reducing space and is also constructed. From this point of view, it is extremely easy to control the posture of the revetment block that can stand on its own during transportation and stacking by a crane.

For example, when the revetment block 10 has the above specifications, the revetment block 10 cannot be made to stand on its own unless the position of the center of gravity is adjusted because the dimension D10 in the front-rear direction is small. Therefore, as described above, a method of providing a thick portion 11c on the front plate portion 11, a method of providing a reinforcing portion 13a on each connecting plate portion 13, and a vertical cross-sectional shape of the connecting hole 13b of each connecting plate portion 13 are devised. The position of the center of gravity of the revetment block 10 is adjusted by such a method. That is, by adjusting the center of gravity of the revetment block 10 so as to be located above the lower surface of the support portion 14 shown in FIG. 1 (C), the revetment block 10 can stand on its own in the posture shown in FIG. 1 (C). I have to.

Next, with reference to FIG. 2, the configuration of the revetment structure 20 to which the present invention is applied, that is, the revetment structure 20 constructed by using the revetment block 10 shown in FIG. 1 will be described. In this description, for convenience, the left side of FIG. 2 is referred to as front, the right side is referred to as rear, the back side is referred to as left, the front side is referred to as right, the upper side is referred to as upper, and the lower side is referred to as lower.

The bank protection structure 20 shown in FIG. 2 includes a backing material layer 22 provided on the slope of the ground 21, a foundation material layer 23 provided at the lower end of the backfilling material layer 22, and a foundation material layer 23. Provided in the gap GA between the foundation concrete portion 24 provided above, the shore protection blocks 10 stacked in multiple stages along the surface of the backing material layer 22 with the foundation concrete portion 24 as a reference, and the shore protection blocks 10 stacked. The built-in concrete portion 25, the top concrete layer 26 provided behind the first overhanging portion 11a of the front plate portion 11 of the uppermost shore protection block 10, the upper surface and the ground of the top concrete layer 26. It is provided with a filling portion 27 that covers the upper surface of the 21.

The ground 21 is a leveled ground such as a riverbank, a coast, or a lakeshore. The backfill material layer 22 and the foundation material layer 23 are made of crushed stone, recycled crushed stone, or the like. On the upper surface of the foundation concrete portion 24, a second overhanging portion 12a of the rear plate portion 12 of the revetment block 10 and a recess 24a for receiving each support portion 14 are formed in the left-right direction. In addition to the gap GA of each of the revetment blocks 10, the body-filled concrete portion 25 also enters the connecting hole 13b of each connecting plate portion 13. The top concrete layer 26 is manufactured from the rear side of the first overhanging portion 11a of the front plate portion 11 of the uppermost revetment block 10 to the upper surface of the backfill material layer 22, and its vertical dimension is the first. 1 It is the same as the vertical dimension 11a of the overhanging portion 11a.

The revetment blocks 10 stacked in multiple stages have the stacked arrangement shown in FIG. 3A or FIG. 3B when viewed from the front. The stacked arrangement shown in FIG. 3A is a matrix arrangement in which the revetment block 10 on the upper stage side is stacked on the revetment block 10 on the lower stage side without shifting in the left-right direction. On the other hand, in the stacking arrangement shown in FIG. 3B, the revetment block 10 on the upper stage is stacked on the revetment block 10 on the lower stage with the revetment block 10 on the upper stage shifted in the left-right direction by 1/2 of the lateral dimension W11 of the front plate portion 11. It is a staggered arrangement.

Next, an example of a construction method of the revetment structure 20 shown in FIG. 2 will be described with reference to FIGS. 4 to 8 in order to supplement the structural understanding of the revetment structure 20 shown in FIG. In this explanation, for convenience, the left side of FIG. 4 is referred to as front, the right side is referred to as rear, the back side is referred to as left, the front side is referred to as right, the upper side is referred to as upper, and the lower side is referred to as lower. Show the orientation. Further, the construction method described here is only an example, and does not limit the construction method of the revetment structure 20.

First, a backing material layer 22 is formed on the slope of the ground 21, a foundation material layer 23 is formed at the lower end thereof, and then a foundation concrete portion 24 having a recess 24a is formed on the foundation material layer 23. ..

Subsequently, as shown in FIG. 4, after the rear surface of the rear plate portion 12 of the revetment block 10 conveyed by the crane is brought into contact with the surface of the backfill material layer 22, the revetment block 10 is lowered to one stage. The second overhanging portion 12a of the rear plate portion 12 of the revetment block 10 (first piece) of the eye and each supporting portion 14 are inserted into the recess 24a of the foundation concrete portion 24 and installed. Subsequently, another revetment block 10 is similarly installed on at least one of the left side and the right side of the revetment block 10, and the work of arranging them in the left-right direction is repeated to stack the first-stage revetment blocks 10.

Subsequently, as shown in FIG. 5, after the rear surface of the rear plate portion 12 of the revetment block 10 conveyed by the crane is brought into contact with the surface of the backfill material layer 22, the revetment block 10 is lowered to two stages. The second overhanging portion 12a of the rear plate portion 12 of the revetment block 10 (first piece) of the eyes and each support portion 14 are placed behind the first overhanging portion 11a of the front plate portion 11 of the first stage revetment block 10. Insert it on the side and install it. Subsequently, another revetment block 10 is similarly installed on at least one of the left side and the right side of the revetment block 10, and the work of arranging the revetment blocks 10 in the left-right direction is repeated to stack the second-stage revetment blocks 10.

As described above, the center in the left-right direction of the connecting plate portion 13 on the left side of the revetment block 10 is located at the position of "1/4 of the left-right dimension W11" from the left end of the front plate portion 11, and the connecting plate portion 13 on the right side. Since the center in the left-right direction of is located at the position of "1/4 of the dimension W11 in the left-right direction" from the right end of the front plate portion 11, the matrix arrangement shown in FIG. And one of the staggered arrangements shown in FIG. 3 (B) can be selectively adopted.

Further, the vertical dimension H11a of the first overhanging portion 11a of the front plate portion 11 of the revetment block 10 and the vertical dimension H12a of the second overhanging portion 12a of the rear plate portion 12 are the same, and each support portion 14 Since the vertical dimension of the second overhanging portion 12a is the same as the vertical dimension H12a of the second overhanging portion 12, each of the stacked second-stage revetment blocks 10 has a lower surface of each support portion 14 of the first-stage revetment block 10. It is in contact with the upper surface of the connecting plate portion 13. Further, in each of the stacked second-stage revetment blocks 10, the lower surface of the front plate portion 11 is in contact with the upper surface of the front plate portion 11 of the first-stage revetment block 10, and the lower surface of the rear plate portion 12 is one stage. It touches the upper surface of the rear plate portion 12 of the revetment block 10 of the eyes. That is, each of the second-stage revetment blocks 10 can be stacked on the first-stage revetment block 10 in a stable posture.

Further, although the rear surface of each support portion 14 of the revetment block 10 is inclined backward at an angle θ, the front surface 14a thereof is perpendicular to the upper surface and the lower surface of the support portion 14, so that the second stage is provided. When the second overhanging portion 12a of the rear plate portion 12 of each revetment block 10 and each support portion 14 are inserted behind the first overhanging portion 11a of the front plate portion 11 of the first stage revetment block 10. It is possible to prevent each support portion 14 from colliding with the first overhanging portion 11a of the front plate portion 11 of the first stage revetment block 10 as much as possible. That is, each of the second-stage revetment blocks 10 can be relatively easily stacked on the first-stage revetment block 10.

That is, when looking up at the second-stage revetment block 10 on the first-stage revetment block 10, the second overhanging portion 12a of the rear plate portion 12 of each of the second-stage revetment blocks 10 and each support portion 14 are set to one stage. Since it is only necessary to insert it into the rear side of the first overhanging portion 11a of the front plate portion 11 of the revetment block 10 of the eyes, it is not necessary to perform the alignment related to the fitting as before when stacking. It is possible to reduce the labor and time related to the above.

Subsequently, as shown in FIG. 6, the third and uppermost revetment blocks 10 are stacked in the same manner as described above, and when the uppermost revetment blocks 10 have been stacked, the uppermost revetment blocks 10 are each. Unhardened concrete is poured into the gap GA of the above, and a concrete portion 25 is formed in the gap GA of each of the stacked revetment blocks 10. It should be noted that the body-filled concrete portion 25 may be manufactured every one step or every two steps. As can be seen from FIG. 6, when the stacking of the uppermost revetment blocks 10 is completed, the first overhanging portion 11a of the front plate portion 11 of each of the uppermost revetment blocks 10 is the upper surface and the body of the backfill material layer 22. It protrudes above the upper surface of the built-in concrete portion 25.

Subsequently, as shown in FIG. 7, the top concrete layer 26 extends from the rear side of the first overhanging portion 11a of the front plate portion 11 of each of the uppermost revetment blocks 10 to the upper surface of the backing material layer 22. To make it. As can be seen from FIG. 7, the vertical dimension of the top concrete layer 26 is the same as the vertical dimension H11a of the first overhanging portion 11a. The reason why the vertical dimension of the top concrete layer 26 is the same as the vertical dimension H11a of the first overhanging portion 11a is that the top end concrete layer 26 is hidden by the first overhanging portion 11a so as not to be seen from the front. This is to improve the appearance of the revetment structure 20 when viewed from the front. In other words, since there is a standard for the vertical dimension of the top concrete layer 26, the top concrete layer 26 can be set from the front by setting the vertical dimension H11a of the first overhanging portion 11a according to this standard. The appearance can be significantly improved compared to when it is visible.

Subsequently, as shown in FIG. 8, the embankment portion 27 is manufactured so as to cover the upper surface of the top concrete layer 26 and the upper surface of the ground 21. This completes the construction of the revetment structure 20 shown in FIG.

Next, the action and effect obtained by the revetment block 10 and the revetment structure 20 will be described.

<E1> The front plate portion 11 of the revetment block 10 has a first overhanging portion 11a overhanging above the upper surface of each connecting plate portion 13, and the rear plate portion 12 is below the lower surface of each connecting plate portion 13. A support portion 14 having the same vertical dimensions as the first overhang portion 11a and having a second overhang portion 12a having the same vertical dimensions as the first overhang portion 11a is provided on the lower surface of each connecting plate portion. It is provided. That is, when looking up at the upper revetment block 10 on the lower revetment block 10, the second overhanging portion 12a of the rear plate portion 12 of each of the upper revetment blocks 10 and each support portion 14 are used as the lower revetment block. Since it is only necessary to insert it into the rear side of the first overhanging portion 11a of the front plate portion 11 of 10, it is not necessary to perform the alignment related to the fitting as before when stacking. You can save time.

<E2> The lower surface of the front plate portion 11 of the revetment block 10 is flush with the lower surface of each connecting plate portion 13, and the upper surface of the rear plate portion 12 is flush with the lower surface of each connecting plate portion 13. The lower surface of the 12 is flush with the lower surface of each support portion 14. That is, in each of the upper revetment blocks 10 stacked on the lower revetment block 10, the lower surface of each support portion 14 is in contact with the upper surface of the connecting plate portion 13 of the lower revetment block 10 and the front plate portion 11. Since the lower surface is in contact with the upper surface of the front plate portion 11 of the lower revetment block 10 and the lower surface of the rear plate portion 12 is in contact with the upper surface of the rear plate portion 12 of the lower revetment block 10, the upper revetment block 10 is in contact with the upper surface. Each can be stacked on the lower revetment block 10 in a stable posture.

<E3> The front-rear dimension of the upper surface of each support portion 14 of the revetment block 10 is obtained by subtracting the thickness of the first overhanging portion 11a from the front-rear dimension between the front surface of the front plate portion 11 and the rear surface of the rear plate portion 12. Consistent with the dimensions, the anteroposterior dimension of the lower surface of each support portion 14 is slightly smaller than the anteroposterior dimension of the upper surface of each support portion 14. That is, the second overhanging portion 12a of the rear plate portion 12 of each of the revetment blocks 10 on the upper stage side and each support portion 14 are inserted into the rear side of the first overhanging portion 11a of the front plate portion 11 of the revetment block 10 on the lower stage side. Since it is possible to avoid the support portions 14 from colliding with the first overhanging portion 11a of the front plate portion 11 of the revetment block 10 on the lower stage side as much as possible, each of the revetment blocks 10 on the upper stage side can be relatively easily placed on the lower stage side. Can be stacked on the revetment block 10 of.

<E4> The center of gravity of the revetment block 10 is set so that the lower surface of the rear plate portion 12 and the lower surface of each support portion 14 can stand on their own. That is, since the revetment block 10 brought into the site before or during construction can be stored in an independent state, it is effective in reducing the storage space. Further, since the posture of the revetment block 10 at the time of transportation and stacking by the crane can be set to a posture close to the self-supporting state, it is extremely easy to control the attitude of the revetment block 10 at the time of transportation and stacking.

<E5> A thick portion 11c for adjusting the position of the center of gravity is provided in the lower part of the front plate portion 11 of the revetment block 10, and each connecting plate portion 13 has a connecting hole 13b that also adjusts the position of the center of gravity in the left-right direction. It is formed. That is, since the position of the center of gravity of the revetment block 10 is adjusted by a method of providing a thick portion 11c on the front plate portion 11 or a method of devising the vertical cross-sectional shape of the connecting hole 13b of each connecting plate portion 13, the revetment block 10 is adjusted. Even when the dimension D10 in the front-rear direction of 10 is small, the desired position of the center of gravity can be accurately adjusted.

<E6> On the rear side of the first overhanging portion 11a of the front plate portion 11 of the uppermost revetment block 10 of the revetment structure 20, there is a top concrete layer 26 having the same vertical dimensions as the first overhanging portion 11a. It is provided. That is, the top concrete layer 26 can be hidden from the front by the first overhanging portion 11a to improve the appearance of the revetment structure 20 when viewed from the front. In other words, since there is a standard for the vertical dimension of the top concrete layer 26, if the vertical dimension H11a of the first overhanging portion 11a is set according to this standard, the top concrete layer 26 can be seen from the front. The appearance can be significantly improved compared to the case.

Next, a modified example of the revetment block 10 and the revetment structure 20 capable of obtaining the same effect will be described.

<M1> FIG. 1 shows a shore protection block 10 in which the left-right dimension W11 of the front plate portion 11 and the left-right dimension W12 of the rear plate portion 12 are the same. When arranging them in the left-right direction with priority, it is preferable to set the left-right dimension of the rear plate portion 12 to be slightly smaller than the left-right dimension of the front plate portion 11. For example, if the left-right dimension of the rear plate portion 12 is set to about 97% of the left-right dimension of the front plate portion 11, the revetment blocks 10 can be arranged in the left-right direction with priority given to the left-right dimension of the front plate portion 11. can.

<M2> FIG. 1 shows a revetment block 10 in which the left-right dimension W11 of the front plate portion 11 and the left-right dimension W12 of the rear plate portion 12 are the same. The left-right dimension of the plate portion 12 may be set to be considerably smaller than the left-right dimension of the front plate portion 11. For example, as shown in FIG. 9, if the left-right dimension of the rear plate portion 12 is set to about 70% of the left-right dimension of the front plate portion 11, the mass of the revetment block 10 can be reduced by the amount of reduction. ..

<M3> FIG. 1 shows a revetment block 10 provided with two connecting plate portions 13 (two support portions 14) between the front plate portion 11 and the rear plate portion 12, but the front plate portion is shown. When the lateral dimension of 11 is large, the number of connecting plate portions 13 may be three (the support portions 14 are also three). In this case, the left-right center of the connecting plate portion 13 is set to the position of "1/6 of the left-right dimension W11" from the left end of the front plate portion 11, and the left-right center of the connecting plate portion 13 is the right end of the front plate portion 11. Alternatively, if the position is "1/2 of the left-right dimension W11" from the left end, and the left-right center of the right connecting plate portion 13 is the position of "1/6 of the left-right dimension W11" from the right end of the front plate portion 11. , One of the matrix sequence shown in FIG. 3 (A) and the sequence similar to the staggered sequence shown in FIG. 3 (B) can be selectively adopted.

<M4> FIG. 1 shows a shore protection block 10 in which the horizontal dimension W11 of the front plate portion 11 is larger than the vertical dimension H11, but the horizontal dimension W11 and the vertical dimension H11 of the front plate portion 11 are the same. Alternatively, the horizontal dimension W11 of the front plate portion 11 may be smaller than the vertical dimension H11. Further, the inclination angle θ between the front plate portion 11 and the rear plate portion 12 may be slightly smaller or larger than the angle shown in the drawing.

10 ... revetment block, 11 ... front plate part, 11a ... first overhanging part, 11b ... decorative part, 11c ... thick part, 12 ... rear plate part, 12a ... second overhanging part, 13 ... connecting plate part, 13a ... Reinforcement part, 13b ... Communication hole, 14 ... Support part, 14a ... Front surface, GA ... Gap, 20 ... Revetment structure, 21 ... Ground, 22 ... Backfill material layer, 23 ... Foundation material layer, 24 ... Foundation concrete Part, 25 ... concrete part with body, 26 ... concrete layer at the top, 27 ... embankment part.

Claims (8)

It is a revetment block that can be stacked in multiple stages.
Front plate and
The rear plate portion provided behind the front plate portion and
A connecting plate portion for forming a vertical gap between the front plate portion and the rear plate portion is provided.
The outer shape of the front plate portion is rectangular, and the front plate portion has a first overhanging portion that overhangs above the upper surface of the connecting plate portion.
The outer shape of the rear plate portion is rectangular, and the rear plate portion projects below the lower surface of the connecting plate portion and has a second overhanging portion having the same vertical dimension as the first overhanging portion. And
The lower surface of the connecting plate portion is provided with a support portion having the same vertical dimensions as the second overhanging portion and supporting the lower surface of the connecting plate portion .
By inserting the second overhanging portion and the supporting portion of the rear plate portion of the revetment block into the rear side of the first overhanging portion of the front plate portion of the revetment block on the lower stage side, the said The revetment block is a revetment block that can be stacked on the lower revetment block. The lower surface of the front plate portion is flush with the lower surface of the connecting plate portion, the upper surface of the rear plate portion is flush with the upper surface of the connecting plate portion, and the lower surface of the rear plate portion is the lower surface of the support portion. Is flush with
The revetment block according to claim 1. The front plate portion and the rear plate portion are inclined backward, and the front surface of the front plate portion and the rear surface of the rear plate portion are parallel.
The revetment block according to claim 1 or 2. The front-rear dimension of the upper surface of the support portion corresponds to the dimension obtained by subtracting the thickness of the first overhanging portion from the front-rear dimension of the front surface of the front plate portion and the front surface of the rear plate portion.
The anteroposterior dimension of the lower surface of the support portion is slightly smaller than the anteroposterior dimension of the upper surface of the support portion.
The revetment block according to claim 3. The center of gravity of the revetment block is set so that the lower surface of the rear plate portion and the lower surface of the support portion can stand on their own.
The revetment block according to claim 3 or 4. A thick portion for adjusting the position of the center of gravity is provided in the lower portion of the front plate portion.
A connecting hole that also adjusts the position of the center of gravity is formed in the connecting plate portion in the left-right direction.
The revetment block according to claim 5. A revetment structure constructed by stacking the revetment blocks according to any one of claims 1 to 6 in multiple stages along the surface of the backing material layer.
In the revetment block on the upper stage side, the second overhanging portion and the support portion of the rear plate portion are inserted behind the first overhanging portion of the front plate portion of the revetment block on the lower stage side, and the lower surface of the support portion is the lower stage. It is stacked so that it touches the upper surface of the connecting plate of the revetment block on the side.
A concrete part is provided in the gap between each of the multi-tiered revetment blocks.
Revetment structure. On the rear side of the first overhanging portion of the front plate portion of the uppermost revetment block, a top concrete layer having the same vertical dimension as the first overhanging portion is provided.
The revetment structure according to claim 7.

Images