JP2019035290A - Revetment block and revetment structure - Google Patents

Abstract

To provide a revetment block which reduces labor and time associated with stacking, and achieves improvement of workability.SOLUTION: A revetment block 10 includes a connection plate part 13 for forming a gap GA in a vertical direction between a front plate part 11 and a rear plate part 12. The front plate part 11 has a first extension part 11a extending upward from the upper surface of the connection plate part 13, and the rear plate part 12 has a second extension part 12a which extends downward from the lower surface of the connection plate part 13 and has the same dimension in the vertical direction as that of the first extension part 11a. The lower surface of the connection plate part 13 is provided with a support part 14 having the same dimension in the vertical direction as that of the second extension part 12a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bank protection block and a bank protection structure constructed using the bank protection block.

  In Patent Document 1 described later, a hollow portion extending from the upper surface to the lower surface is provided at the center between the front surface and the rear surface, and concave portions extending from the upper surface to the lower surface are provided on both sides thereof, and the hollow portion and the concave portion on the upper surface are excluded. There is disclosed 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 excluding a hollow portion and a recess on the lower surface. This block is constructed by stacking the blocks along the surface of the backing material so that the fitting recesses of the upper block fit into the fitting protrusions of the lower block, and putting the concrete into the hollow parts and recesses of the stacked blocks. It is constructed by filling.

  However, when the upper block is stacked on the lower block, it is necessary to fit the block while aligning the fitting recess of the upper block with the fitting protrusion of the lower block. This fitting operation is difficult even for a skilled worker because a block having a small size has a mass of several hundred kg. That is, it is difficult to say that the workability of the block is good because of the labor and time required for stacking.

JP 2017-106233 A

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

  In order to solve the above problems, a revetment block according to the present invention is a revetment block including a connecting plate portion for forming a vertical gap between a front plate portion and a rear plate portion, and the front plate The outer shape of the portion is rectangular, the front plate portion has a first protruding portion that protrudes upward from the upper surface of the connecting plate portion, and the outer shape of the rear plate portion is rectangular. The rear plate portion projects downward from the lower surface of the connecting plate portion, and has a second extending portion having the same vertical dimension as the first protruding portion, and the lower surface of the connecting plate portion includes: A support portion having the same vertical dimension as the second overhang portion is provided.

  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. The 2nd overhang | projection part and the support part 14 are inserted in the back side of the 1st overhang | projection part of the front board part of a lower stage side revetment block, and the lower surface of a support part is the upper surface of the connection board part of a lower stage revetment block It is piled up so that it may touch, and the intrusion concrete part is provided in the gap of each revetment block piled up in multiple stages.

  ADVANTAGE OF THE INVENTION According to this invention, the revetment block which can reduce the labor and time concerning stacking, and can improve workability, and the revetment structure which can be constructed | assembled under high workability using this revetment block can be provided.

1A is a view of the revetment block to which the present invention is applied as viewed from the front, FIG. 1B is a view of the revetment block as viewed from the back, and FIG. 1C 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 sectional drawing. FIG. 2 is a longitudinal sectional view of a revetment structure to which the present invention is applied. 3 (A) and 3 (B) are diagrams respectively showing a stacked arrangement of revetment blocks when the revetment structure shown in FIG. 2 is viewed from the front. FIG. 4 is an explanatory view of an example of a construction method of the revetment structure shown in FIG. FIG. 5 is an explanatory diagram of a construction method example of the revetment structure shown in FIG. FIG. 6 is an explanatory view of an example of a construction method of the revetment structure shown in FIG. FIG. 7 is an explanatory view of an example of a construction method of the revetment structure shown in FIG. FIG. 8 is an explanatory diagram of a construction method example of the revetment structure shown in FIG. FIG. 9A is a diagram corresponding to FIG. 1D showing a modification of the revetment block shown in FIG. 1, and a diagram corresponding to FIG. 1E showing the modification.

  First, the structure of the revetment block 10 to which this invention is applied is demonstrated using FIG. In this description, for the sake of convenience, the left side of FIG. 1C is indicated as the front, the right side as the rear, the back side as the left, the front side as the right, the upper side as the upper side, and the lower side as the lower side. The direction is written according to. In addition, in this explanation, the notation such as “same dimension”, “same plane”, “same angle”, “same face”, “same thickness”, “same dimension”, “right angle”, etc. are designed. This is for convenience based on the above reference dimensions, and including manufacturing tolerances may actually vary within the tolerances.

  A 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 serve to connect the front plate portion 11 and the rear plate portion 12 as well as the front plate portion 11 and the rear plate portion. It plays the role of forming three gaps GA in the vertical direction between the plate portion 12. In addition, although the revetment block 10 has an internal reinforcement, the illustration is abbreviate | omitted in FIG.1 (F).

  As shown in FIGS. 1A and 1B, the outer shape of the front plate portion 11 and the outer shape of the rear plate portion 12 are both rectangular, and the horizontal dimension W11 of the front plate portion 11 and the rear The horizontal dimension W12 of the plate part 12 is the same, and the vertical dimension H11 of the front plate part 11 and the vertical dimension H12 of the rear plate part 12 are the same. Further, as shown in FIG. 1C, the front plate portion 11 and the rear plate portion 12 are inclined 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. is there.

  Further, as shown in FIGS. 1A to 1C and FIG. 1F, the upper portion of the front plate portion 11 protrudes upward from the upper surface of each connecting plate portion 13. 11a, and the lower part of the rear plate part 12 is a second projecting part 12a projecting downward from the lower surface of each connecting plate part 13, and the vertical dimension H11a of the first projecting part 11a and the first dimension The vertical dimension H12a of the two overhang portions 12a is the same.

  Further, as shown in FIGS. 1 (A) and 1 (C) to 1 (F), the front plate portion 11 has a rectangular outer shape on the front surface, and a rocky surface pattern or stone on the surface. A plurality of (in the drawing, a total of twelve) decorative parts 1b with a skin pattern or the like are provided so as to be lined up in the left-right direction and the up-down direction via a gap. As can be seen from FIG. 1A, the left and right dimensions of the decorative portions 11b arranged in the left and right direction are not the same so that the position of the left and right direction gap is shifted in the up and down direction. In other words, the plurality of decorative portions 11b provided on the front surface of the front plate portion 11 are configured such that a landscape like a stone wall is obtained.

  Further, as shown in FIGS. 1C and 1F, the front plate portion 11 has an upper surface and a lower surface that are parallel to each other, and the rear plate portion 12 also has an upper surface and a lower surface that are parallel to each other. Each connecting plate portion 13 also has an upper surface and a lower surface that are 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 each connecting plate portion. 13 and the lower surface of the rear plate portion 12 are flush with the lower surface of each support portion 14. Further, as shown in FIG. 1 (D), the left-right direction center of the left connecting plate portion 13 is located at a position of “¼ of the left-right direction dimension W11” from the left end of the front plate portion 11, and the right connecting plate. The center in the left-right direction of the portion 13 is at a position “1/4 of the left-right direction 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 the portion excluding the upper portion (thick 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 FIG. 1C to FIG. 1E, a reinforcing portion 13 a having a trapezoidal cross section is formed on the front plate side 13 a of each connecting plate portion 13. This reinforcement part 13a is consideration regarding the gravity center position adjustment mentioned later, and also plays the role of connection reinforcement | strengthening with each connection board part 13 and the front board part 11. FIG. Further, as shown in FIGS. 1 (C) and 1 (F), each connecting plate portion 13 is formed with a connecting hole 13b having a trapezoidal longitudinal cross section communicating with the gap GA in the left-right direction. Yes. The reason why the connecting hole 13b having a vertical cross-sectional shape in which the vertical cross-sectional area of the lower part of the connecting hole 13b is larger than the vertical cross-sectional area of the upper part in each connecting plate portion 13 is to consider the center of gravity position adjustment described later. It is.

  Further, as shown in FIGS. 1C and 1E, each support portion 14 has a lateral dimension slightly larger than the lateral dimension of each connecting plate portion 13 or the connecting plate portion 13. It has the same horizontal dimension as the horizontal dimension. Furthermore, 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 dimension of the upper surface of each support portion 14 is the front-rear dimension D10 between the front surface of the front plate portion 11 and the rear surface of the rear plate portion 12 (FIG. 1D). 2), the front-rear dimension of the lower surface of each support part 14 is slightly smaller than the front-rear dimension of the upper surface of each support part 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 is perpendicular to the upper and lower surfaces of each support portion 14.

  For reference, the specifications of the revetment block on which FIG. 1 is based are as follows. The horizontal dimension W11 of the front plate part 11 and the horizontal dimension W12 of the rear plate part 12 are 1250 mm, and the vertical dimension H11 of the front plate part 11 is The vertical dimension H12 of the rear plate part 12 is 800 mm, the vertical dimension H11a of the first projecting part 11a and the vertical dimension H12a of the second projecting part 12a are 100 mm, the front surface of the front plate part 11 and the rear plate part 12 The dimension D10 in the front-rear direction with 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. In general, when building a revetment structure, the revetment block is carried to the site before or during construction, and the revetment block, which can stand on its own from the viewpoint of storage space, is more effective in reducing space. From the viewpoint of the above, the revetment block that can be self-supporting is much easier to control the posture during transportation and stacking by crane.

  For example, when the revetment block 10 has the above-described specifications, the revetment block 10 cannot be made independent unless the center of gravity position is adjusted because the front-rear direction dimension D10 is small. Therefore, as described above, the method of providing the thick portion 11c in the front plate portion 11, the method of providing the reinforcing portion 13a in each connecting plate portion 13, and the longitudinal sectional shape of the connecting hole 13b of each connecting plate portion 13 are devised. The center-of-gravity position of the revetment block 10 is adjusted by the technique of performing. 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. 1C, the revetment block 10 can be made independent in the posture shown in FIG. I have to.

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

  The revetment 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 backing material layer 22, and a foundation material layer 23. Provided in the gap GA between the foundation concrete portion 24 provided above, the revetment block 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 stacked revetment block 10 The upper concrete layer 26 provided on the rear side of the first overhanging portion 11a of the front plate portion 11 of the uppermost revetment block 10, the upper surface of the top concrete layer 26 and the ground And an embankment portion 27 that covers the upper surface of 21.

  The ground 21 is prepared by adjusting the shore such as a river bank, a coast, a lake shore, and the like. The backing material layer 22 and the base 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 between the revetment blocks 10, the trunk concrete portion 25 also enters the communication hole 13 b of each connecting plate portion 13. The top concrete layer 26 is produced from the rear side of the first overhanging portion 11a of the front plate portion 11 of the top revetment block 10 to the upper surface of the backing material layer 22, and the vertical dimension thereof is the first. This is the same as the vertical dimension 11a of one 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 upper bank protection block 10 is stacked on the lower bank protection block 10 without shifting in the left-right direction. On the other hand, in the stacked arrangement shown in FIG. 3B, the upper bank protection block 10 is stacked on the lower bank protection block 10 while being shifted in the left-right direction by 1/2 of the horizontal dimension W11 of the front plate portion 11. It is a staggered arrangement.

  Next, in order to supplement the understanding of the structure of the revetment structure 20 shown in FIG. 2, an example of a construction method for the revetment structure 20 shown in FIG. 2 will be described using FIGS. 4 to 8. In this description, for the sake of convenience, the left side of FIG. 4 is indicated as the front, the right side as the rear, the back side as the left, the front side as the right, the upper side as the upper, and the lower side as the lower. Indicate the direction. Moreover, the construction method demonstrated here is an example to the last, Comprising: The construction method of the revetment structure 20 is not restrict | limited.

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

  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 backing material layer 22, the revetment block 10 is lowered to be one step. The 2nd overhang | projection part 12a and each support part 14 of the rear-plate part 12 of the revetment block 10 (1st piece) of the eye are inserted in the recessed part 24a of the foundation concrete part 24, and are installed. Subsequently, another revetment block 10 is similarly installed on at least one of the left and right sides of the revetment block 10 and arranged in the left-right direction, and the first-stage revetment block 10 is stacked.

  Then, as shown in FIG. 5, after making the rear surface of the rear plate part 12 of the revetment block 10 conveyed by the crane contact the surface of the backing material layer 22, the revetment block 10 is lowered to make two steps The second overhanging portion 12a of the rear plate portion 12 of the eye revetment block 10 (first piece) and each support portion 14 are arranged after the first overhanging portion 11a of the front plate portion 11 of the first stage revetment block 10. Install it on the side. Subsequently, another revetment block 10 is similarly installed on at least one of the left and right sides of the revetment block 10 and arranged in the left-right direction, and the second-stage revetment block 10 is stacked.

  As described above, the left-right direction center of the connecting plate portion 13 on the left side of the revetment block 10 is located at “1/4 of the left-right direction dimension W11” from the left end of the front plate portion 11, and the right-side connecting plate portion 13. Since the center in the left-right direction is at a position “1/4 of the left-right dimension W11” from the right end of the front plate 11, the matrix arrangement shown in FIG. One of the staggered arrangement shown in FIG. 3B can be selectively employed.

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

  Furthermore, each support portion 14 of the revetment block 10 has a rear surface inclined rearward at an angle θ, but its front surface 14a is perpendicular to the upper and lower surfaces of the support portion 14, so that the second stage When inserting the second overhanging portion 12a of the rear plate portion 12 of each revetment block 10 and each support portion 14 into the rear side of the first overhanging portion 11a of the front plate portion 11 of the first stage revetment block 10, It can avoid as much as possible that each support part 14 collides with the 1st overhang | projection part 11a of the front board part 11 of the first-stage revetment block 10. That is, each of the second-stage revetment blocks 10 can be stacked on the first-stage revetment block 10 relatively easily.

  That is, when the second-stage revetment block 10 is looked up at the first-stage revetment block 10, the second projecting portion 12 a of the rear plate portion 12 of each second-stage revetment block 10 and each support portion 14 are arranged in one step. Since it only needs to be inserted into the rear side of the first overhanging portion 11a of the front plate portion 11 of the revetment block 10 of the eye, there is no need for the alignment related to the conventional fitting at the time of stacking. Can reduce the labor and time involved.

  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 block 10 has been stacked, The uncured concrete is poured into the gap GA, and the trunk concrete portion 25 is prepared in the gap GA of each of the stacked revetment blocks 10. In addition, you may perform this production of the intruded concrete part 25 for every one step or every two steps. As can be seen from FIG. 6, when the uppermost revetment block 10 has been stacked, the first overhanging portion 11 a of the front plate portion 11 of each uppermost revetment block 10 has the upper surface and the trunk of the backing material layer 22. It projects upward from the upper surface of the embedded concrete part 25.

  Subsequently, as shown in FIG. 7, the top concrete layer 26 extends from the rear side of the first overhanging portion 11 a of the front plate portion 11 of each uppermost revetment block 10 to the upper surface of the backing material layer 22. 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 for making the vertical dimension of the top end concrete layer 26 the same as the vertical dimension H11a of the first overhanging portion 11a is to hide the top end concrete layer 26 from the front by the first overhanging portion 11a. This is to improve the appearance when the revetment structure 20 is viewed from the front. In other words, since there is a standard for the vertical dimension of the top concrete layer 26, the vertical dimension H11a of the first overhanging portion 11a is set according to this standard, so that the top concrete layer 26 is moved from the front. The appearance can be greatly improved compared to the case where it can be seen.

  Subsequently, as shown in FIG. 8, the embankment 27 is produced so as to cover the upper surface of the top concrete layer 26 and the upper surface of the ground 21. Thus, the construction of the revetment structure 20 shown in FIG. 2 is completed.

  Next, the operational effects 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 overhang portion 11a that protrudes upward from the upper surface of each connecting plate portion 13, and the rear plate portion 12 is lower than the lower surface of each connecting plate portion 13. And has a second overhanging portion 12a having the same vertical dimension as the first overhanging portion 11a, and a support portion 14 having the same vertical dimension as the second overhanging portion 12a on the lower surface of each connecting plate portion. Is provided. That is, when the upper-stage side revetment block 10 is looked up at the lower-stage side revetment block 10, the second overhanging portion 12a of the rear plate portion 12 and each support portion 14 of each upper-stage revetment block 10 are connected to the lower-stage revetment block 10 respectively. Since it is only necessary to insert it into the rear side of the first overhanging portion 11a of the front plate portion 10 of the ten, there is no need for the alignment related to the conventional fitting in the case of stacking. Time can be reduced.

  <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 12 is flush with the lower surface of each support portion 14. That is, each of the upper revetment blocks 10 stacked on the lower revetment block 10 has the lower surface of each support portion 14 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 Each of them can be stacked on the revetment block 10 on the lower side 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 reducing the thickness of the first overhanging portion 11a from the front-rear dimension of the front surface of the front plate portion 11 and the rear surface of the rear plate portion 12. The front-rear direction dimension of the lower surface of each support part 14 is slightly smaller than the front-rear direction dimension of the upper surface of each support part 14. That is, the second overhanging portion 12a of the rear plate portion 12 of each upper revetment block 10 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 lower revetment block 10. In this case, it is possible to avoid as much as possible that each support portion 14 hits the first overhanging portion 11a of the front plate portion 11 of the lower-stage side revetment block 10, so that each upper-stage revetment block 10 can be relatively easily moved to the lower-stage side. Can be stacked on the revetment block 10.

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

  <E5> A thick portion 11c for adjusting the center of gravity position 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 also serving as a center of gravity position adjustment in the left-right direction. Is formed. That is, since the position of the center of gravity of the revetment block 10 is adjusted by a method of providing the thick portion 11c in the front plate portion 11 or a method of devising the longitudinal sectional shape of the connection hole 13b of each connection plate portion 13, the revetment block Even when the longitudinal dimension D10 of 10 is small, the desired center-of-gravity position adjustment can be performed accurately.

  <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 dimension as the first overhanging portion 11a. Is provided. That is, the top concrete layer 26 can be hidden by the first overhanging portion 11a so as not to be seen from the front, and the appearance when the revetment structure 20 is seen from the front can be improved. 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. Appearance can be improved significantly compared to the case.

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

  <M1> FIG. 1 shows the revetment block 10 in which the left-right dimension W11 of the front plate 11 and the left-right dimension W12 of the rear plate 12 are the same. In the case of arranging in the left-right direction with priority, the left-right dimension of the rear plate 12 is preferably set slightly smaller than the left-right dimension of the front plate 11. For example, if the left-right dimension of the rear plate part 12 is set to around 97% of the left-right dimension of the front plate part 11, the revetment blocks 10 may be arranged in the left-right direction with priority given to the left-right dimension of the front plate part 11. it can.

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

  <M3> Although FIG. 1 shows the revetment block 10 including two connecting plate portions 13 (two support portions 14) between the front plate portion 11 and the rear plate portion 12, the front plate portion When the left-right dimension of 11 is large, the number of connecting plate portions 13 may be three (three support portions 14 are also included). In this case, the left-right direction center of the left connecting plate portion 13 is set to a position “1/6 of the left-right direction dimension W11” from the left end of the front plate portion 11, and the left-right direction 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 right-left center of the right connecting plate 13 is the position “1/6 of the left-right dimension W11” from the right end of the front plate 11. One of the matrix arrangement shown in FIG. 3A and the arrangement similar to the staggered arrangement shown in FIG. 3B can be selectively employed.

  <M4> FIG. 1 shows the revetment block 10 in which the horizontal dimension W11 of the front plate part 11 is larger than the vertical dimension H11. However, the horizontal dimension W11 and the vertical dimension H11 of the front plate part 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 of the front plate portion 11 and the rear plate portion 12 may be slightly smaller or larger than the illustrated angle.

  DESCRIPTION OF SYMBOLS 10 ... Seawall block, 11 ... Front board part, 11a ... 1st overhang part, 11b ... Makeup part, 11c ... Thick part, 12 ... Rear board part, 12a ... 2nd overhang part, 13 ... Connection board part, 13a ... Reinforcement part, 13b ... Communication hole, 14 ... Support part, 14a ... Front face, GA ... Gap, 20 ... Revetment structure, 21 ... Ground, 22 ... Backing material layer, 23 ... Base material layer, 24 ... Basic concrete Part 25 ... intruded concrete part 26 ... top end concrete layer 27 ... embankment part.

Claims (8)

A revetment block having a connecting plate portion for forming a vertical gap between the front plate portion and the rear plate portion,
The outer shape of the front plate portion is rectangular, and the front plate portion has a first protruding portion that protrudes upward from the upper surface of the connecting plate portion,
The outer shape of the rear plate portion is rectangular, the rear plate portion projects downward from the lower surface of the connecting plate portion, and has a second overhang portion having the same vertical dimension as the first overhang portion. 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.
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 lower surface of the connecting plate portion, and the lower surface of the rear plate portion is the lower surface of the support portion. Is the same as,
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 direction dimension of the upper surface of the support part matches the dimension obtained by subtracting the thickness of the first overhang part from the front-rear direction dimension of the front surface of the front plate part and the rear surface of the rear plate part,
The front-rear dimension of the lower surface of the support part is slightly smaller than the front-rear dimension of the upper surface of the support part,
The revetment block according to claim 3. The center of gravity position is set so that the revetment block can be independent on the lower surface of the rear plate portion and the lower surface of the support portion,
The revetment block according to claim 3 or 4. The lower part of the front plate part is provided with a thick part for adjusting the position of the center of gravity,
In the connection plate portion, a connection hole that also serves as a center of gravity position adjustment is formed in the left-right direction.
The revetment block according to claim 5. A revetment structure constructed by stacking the revetment block according to any one of claims 1 to 6 along a surface of a backing material layer in multiple stages,
The upper side revetment block has the second overhanging part and supporting part of the rear plate part inserted into the rear side of the first overhanging part of the front plate part of the lower side revetment block, and the lower surface of the supporting part is lower It is piled up in contact with the upper surface of the connecting plate part of the side revetment block,
In the gap between each of the revetment blocks stacked in multiple stages, there is a trunk concrete section.
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.

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