JP4987096B2 - Revetment block, revetment using this revetment block, revetment block forming mold apparatus, and revetment block forming method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a revetment block used to construct a slope of a river, a revetment using the revetment block, a forming frame apparatus for a revetment block, and a method for forming a revetment block.

  The shape of a conventional revetment block of this type is uniquely determined by the form of a form for forming it. The revetment is constructed by stacking the molding surface, generally the front surface, to be the surface of the revetment.

  Since this type of conventional revetment block is formed by placing concrete on a mold as described above, this revetment block a becomes the surface of the revetment as shown in FIG. The contour c of the front peripheral edge of the front wall b is linear, and the appearance of the front wall b gives an artificial impression.

  For this reason, the revetment surface constructed with such a revetment block is in a state where the front walls of each revetment block are stacked in an orderly manner, and the state of the revetment surface at this time has almost no joint at the end of the block. Since each block itself is difficult to see separately, it has a problem on the landscape that it can be seen as one large planar structure, which is accompanied by a monotonous feeling and pressure.

  The present invention has been made in view of the above, and a revetment block that can eliminate an artificial impression from the appearance shape of the front wall, and a monotonous feeling and a feeling of pressure from the entire revetment on the landscape using this. A revetment that can be relaxed, and a formwork device for a revetment block that can be molded with a sandy pattern on the front wall of the front wall with an irregular outline at the front peripheral corner of the front wall An object of the present invention is to provide a method for forming a revetment block using this forming mold apparatus.

In order to achieve the above object, a revetment block according to the present invention is a revetment block comprising a front wall and a side wall constituting the periphery of the front wall. The edge part close to the surface of the wall extends to the surface of the front wall, and is cleaved by crushing in a low-strength state to make the contour part of the front wall indefinite.
And in this revetment block, the surface of the front wall was made a sandy pattern.

  The revetment using the above revetment block is constructed in such a way that the revetment blocks are piled up in contact with each other, and a deep joint is formed between the front walls of each revetment block by the contour of the front wall of each revetment block. It has become.

The forming mold apparatus for forming the revetment block includes: a bottom mold for forming the surface of the front wall of the revetment block; and a side mold for standing on the periphery of the bottom mold and forming the side wall of the revetment block. A groove mold with a slope that forms a wedge-shaped undercut between the inner surface of the side mold and the inner surface of the side mold, with the lower surface facing the bottom mold that forms the front wall of the revetment block The frame is provided over the entire inner peripheral surface of the side mold.
In this revetment block forming mold apparatus, each side mold can be moved outward.

  Further, the forming mold apparatus for forming the revetment block forms a bottom mold for forming the back surface of the revetment block and a side wall of the revetment block standing upright around the bottom mold so as to be movable outward. A groove mold formed of a side mold and having a slope on the inner surface of the side mold to form a wedge-shaped undercut portion with the inner surface of the side mold with the upper surface facing upward. It is the structure provided over the entire inner peripheral surface of the side mold.

Further, the molding method for molding the revetment block is that concrete is placed in the mold of a revetment block forming mold device that molds the surface of the front wall of the revetment block with a bottom mold, and this concrete is in a low strength state. The concrete in the mold is demolded upward, the concrete that has entered the undercut portion of the groove mold provided on the inner peripheral surface of the side mold is forcibly removed, and molding in the mold from the slope of the groove mold The part over the surface of the front wall of the revetment block in the state was crushed into a rough split surface.
In addition, concrete is placed in a mold of a revetment block molding formwork device that is erected with the side formwork movable outwardly on the bottom formwork, and each side formwork is placed in a low strength state of this concrete. The frame is moved outwards to open the frame, and the concrete that has entered the undercut portion of the groove mold frame provided on the inner peripheral surface of the side mold frame is forcibly removed and molded in the mold from the slope of the groove mold frame. The part over the surface of the front wall of the revetment block in the state was crushed into a rough split surface.

According to the revetment block according to the present invention, since the contour portion of the front wall of the revetment block has an indefinite shape due to a rough split surface, the contour portion becomes an ambiguous shape and an artificial impression can be softened. .
Furthermore, since the surface of the front wall of the revetment block has a sandy pattern, the brightness of the front wall surface can be reduced and the artificial feeling can be further eased.

The revetment constructed with the revetment block of the above configuration is between the adjacent front walls of each revetment block, by the contour part of the front wall of the revetment block and the groove provided on the back side from this contour part, A deep joint with an obscure outline is formed, and the brightness of the entire revetment can be lowered by the shadow of the deep joint.
Since the front walls of the individual revetment blocks are separated by the deep joints, the entire revetment on the landscape becomes difficult to look like a single plate, the feeling of pressure is reduced, and the monotonous feeling is eased.
Furthermore, the rough split surface provided in the contour portion of the front wall of each revetment block adheres to natural objects such as mud and moss, and is easily weathered with the passage of time. In addition, the rough split surface can suppress reflection of light and reduce reflection (brightness) of the revetment.

  According to the forming mold apparatus according to the present invention for forming the revetment block, the rough dividing surface of the contour portion of the front wall of the revetment block can be formed by forcibly removing by the grooved mold provided in the side mold. It can be set as a simple formwork device.

  And the above-mentioned revetment block concerning the present invention can be simply fabricated by using the above-mentioned formwork device of a revetment block.

It is a perspective view which shows the conventional revetment block. It is a perspective view which shows the bank protection block which concerns on this invention. It is a top view which shows the bank protection block which concerns on this invention. It is a perspective view showing roughly a revetment constructed using a revetment block according to the present invention. It is a perspective view which shows the construction middle of the bank protection using the bank protection block which concerns on this invention. It is an enlarged front view which shows the joint part of a revetment. It is sectional drawing which shows the concrete placement state of the 1st Example of a forming mold apparatus. It is sectional drawing which shows the open frame state of a 1st Example. It is sectional drawing which shows the concrete placement state of the 2nd Example of a forming mold apparatus. It is sectional drawing which shows the frame open state of a 2nd Example. It is sectional drawing which shows the concrete placement state of the 3rd Example of a forming mold apparatus. It is sectional drawing which shows the demolding state of a 3rd Example. It is sectional drawing which shows the concrete placement state of the 4th Example of a forming mold apparatus. It is sectional drawing which shows the frame open state of a 4th Example. It is sectional drawing which shows the concrete placement state of the 5th Example of a forming mold apparatus. It is sectional drawing which shows the open frame state of a 5th Example.

  2 and 3, reference numeral 1 denotes an example of a revetment block whose front shape is a horizontally long rectangular shape, and each surface of the side wall 2 of the revetment block 1 has a groove near the surface of the front wall 3. 4 is provided over the entire circumference. The edge of the groove 4 closer to the surface of the front wall 3 is cut by crushing over the surface of the front wall 3. Thereby, the outline part 5 of the front wall 3 is in a rough split surface state. The contour portion 5 is formed by crushing one edge of the groove 4 so that the width of the surface of the front wall 3 formed by the contour portion 5 is the same as the width of the contour line of the side wall 2. It is getting smaller.

  FIG. 4 schematically shows a revetment 6 constructed on the slope of a river bank using the revetment block 1 having the above-described structure. This revetment 6 is stacked in a staggered manner on a foundation work (not shown). It has a configuration.

  In this revetment 6, the side walls 2 of each revetment block 1 are stacked in contact with each other in the vertical and horizontal directions. And in this revetment 6, the rough crack surface is formed in the outline part 5 of the front wall 3 of each revetment block 1, and the width of this part is the same or smaller than the side wall 2, and this outline part 5 By providing the continuous grooves 4 over the entire circumference of the side wall 2, the deep joint 7 in which the contour portion 5 has an irregular shape that forms a rough crack surface around the front wall 3 of each revetment block 1 constituting the revetment 6. Is formed.

  5 and 6 show an implementation state of the revetment 6 using the revetment block 1, FIG. 5 shows the construction in progress, and FIG. 6 shows the joint. The revetment blocks 1 are stacked in a staggered manner on the foundation work A as shown in FIG. And the deep joint 7 as shown in FIG. 6 is formed between the front walls 3 of the revetment block 1 at this time.

  Next, a molding apparatus and a molding method for the revetment block 1 having the above-described configuration will be described with reference to FIGS.

(First embodiment)
7 and 8, 8 is a forming mold apparatus for carrying out the first embodiment, and the forming mold apparatus 8 has a rectangular planar shape for forming the surface of the front wall 3 of the revetment block 1. The bottom mold 9 and the side mold 10 which is located on the four sides of the bottom mold 9 and forms the side wall 2 of the revetment block 1 are formed. A groove mold 11 for forming the groove 4 in the side wall 2 is fixed to the inner surface of each side mold 10. The cross-sectional shape of this groove mold 11 is as shown in the figure, and the lower surface 11a closer to the bottom mold 9 is a slope whose root portion is higher than the tip. A wedge-shaped undercut portion is formed between the inner mold 10 and the inner surface of the side mold 10. When the concrete is placed in the forming mold apparatus 8, the concrete enters the inside of the lower surface 11a of the groove mold 11. The upper surface 11b of the groove mold 11 is an inclined surface having an appropriate draft angle.

  In the mold apparatus 8 according to the first embodiment, each side mold 10 can be rotated outwardly by a hinge 12 with respect to the bottom mold 9.

  In the first embodiment, concrete is placed in the forming mold apparatus 8 with the side mold 10 closed. As a result, as shown in FIG. 7, the wedge-shaped undercut portion of the groove mold 11 of the side mold 10 is also filled with concrete.

  In this state, the placed concrete is in a low strength state, for example, about 24 hours after placement, that is, in a state where the concrete is not completely cured, each side mold 10 is rotated with the hinge 12 as a base point. Open the frame (FIG. 8). At this time, the groove mold 11 also moves outwards around the hinge 12, but the lower surface 11a of the groove mold 11 enters the concrete in the shape of a wedge, so that the concrete in this portion becomes the groove mold 11 In this case, the portion is crushed by the lower surface 11a of the grooved mold 11, and the portion extending over the front side of the front wall of the revetment block is broken into the small pieces 13 outward. The crushing surface on the side of the concrete body after being crushed as the small pieces 13 becomes a cracked skin surface due to shearing.

  In this way, the revetment block 1 having an indefinite shape in which the contour portion 5 of the front wall 3 shown in FIG. Molded.

  The molded revetment block 1 that has been opened is hardened and then released by lifting upward or by moving laterally. In the case of releasing the mold by lifting upward, a hook for lifting is buried when concrete is placed, although not shown.

(Second embodiment)
FIG. 9 and FIG. 10 show the second embodiment, and the mold apparatus 8a in the second embodiment is such that the side mold frame 10a is opened outward in the horizontal direction with respect to the bottom mold frame 9a. It can be done. Other configurations are the same as those of the first embodiment described above.

  Also in this embodiment, by opening each side mold 10a in the low strength state after placing concrete, it is located below the groove mold 11 as in the first embodiment. Concrete is cut into pieces 13 and the above-described revetment block 1 is formed (FIG. 10).

  In the case of the second embodiment, the lower part of the groove mold 11 is forcibly removed and crushed into the small pieces 13 by the same action as the first embodiment, The trace becomes a crushing surface.

  In addition, each mold apparatus 8 and 8a in each of the first and second embodiments is provided with a mold clamping apparatus (not shown), and by this operation, the mold clamping apparatus 8 and 8a are clamped and opened. A frame is made.

(Third embodiment)
FIG. 11 and FIG. 12 show the third embodiment, and the mold apparatus 8b in this third embodiment has its side mold 10b fixed to the bottom mold 9b integrally ( 11), the molded body 15 after placement is lifted to lift (FIG. 12).

  In this embodiment, when the molded body is lifted in a low strength state after the concrete is placed, the concrete positioned below the groove mold 11 is caught on the lower surface 11a of the groove mold 11 and destroyed, and the small portion is cut. The revetment block 1 is formed as a piece 13 and remains in the mold, and a crack surface is formed in the contour portion of the molded body. In the case of this embodiment, a lifting hook 14 used when placing concrete in the forming mold apparatus is buried in advance.

  In each of the embodiments, the revetment block 1 formed in each molding apparatus 8, 8a, 8b has been described as having a flat back surface. However, as shown in FIG. It goes without saying that legs may be provided.

  At the time of molding in each of the above embodiments, when placing concrete in each mold apparatus 8, 8a, 8b, sand is laid on the bottom molds 9, 9a, 9b to a thickness of about 50 mm. Thereby, the surface of the front wall 3 of the revetment block 1 after shaping | molding can be used as a sand ground. By changing the particle size of the sand in this case, the expression of the sand on the surface of the front wall 3 can be changed. This sand is made of fine river sand and coarse aggregate is used, and those other than those adhering to the front wall surface of the revetment block 1 after molding are scraped off and removed.

  In each of the above embodiments, an example of the approximate size of the revetment block 1 and the mold for molding the same is shown. In FIG. 7, the width W of the front wall 3 is 300 to 1000 mm, the thickness D is 100 mm, and the groove mold 11 (height of groove) t is 10 to 15 mm, the inclination angle θ of the lower surface of the groove mold 11 is 45 degrees, and the height from the bottom mold frames 9, 9a, 9b at the front end of the lower surface of the groove mold 11 h1 is 10 to 15 mm, and the width h2 of the groove mold 11 is 30 to 50 mm.

  In the first to third embodiments described above, an example in which the front wall of the revetment concrete 1 is formed by the bottom molds 9, 9a, 9b of the respective molding apparatus 8, 8a, 8b. Although shown, it is good also considering the upper surface of placement concrete as the surface of the front wall of the revetment block 1 like the 4th-5th Example shown in FIGS. In this case, sand is applied to the surface of the cast concrete that will be the front wall.

(Fourth embodiment)
FIGS. 13 and 14 show a fourth embodiment. In the molding mold apparatus 8c according to the fourth embodiment, the bottom mold, which is the bottom portion of the molding mold apparatus 8c, molds the back surface of the revetment block 1. FIG. It has become. The groove mold 17 for molding the groove 4 in the side wall 2 is formed on the inner surface of the side mold 16 for molding the side wall 2 and is located on the four sides of the bottom mold 15. It is provided in the opposite direction in the vertical direction with respect to the case of the example. That is, the upper surface closer to the upper end of the side mold 16 is a slope that becomes higher toward the tip side. The side mold 16 in the fourth embodiment can be rotated outward with respect to the bottom mold 15 by a hinge 12.

(Fifth embodiment)
FIGS. 15 and 16 show a fifth embodiment. In the molding mold apparatus 8d according to the fifth embodiment, the side mold 16a is opened to the outside in the horizontal direction with respect to the bottom mold 15a. It can be done. Other configurations are the same as those of the fourth embodiment described above.

  In the fourth and fifth embodiments, the concrete is placed in the respective forming mold apparatuses 8c and 8d in a state where the side molds 16 and 16a are closed, and the upper surfaces of the molding mold apparatuses 8c and 8d are leveled. It is the front of the front wall. And before this concrete begins to harden, sand 18 is laminated | stacked over this upper surface over 20-30 mm. As a result, a part of the sand 18 is inserted into the uncured concrete upper surface, and the concrete upper surface which is the surface of the front wall of the revetment block 1 is sand-treated.

  Next, the concrete in the mold apparatus 8c, 8d is in a low strength state, and by opening the respective side molds 16, 16a, the upper portion of the side wall is crushed by the groove mold 17, and the trace is It becomes a crushing surface over the surface of the front wall.

  Even in the fourth and fifth embodiments, as in the first to third embodiments, the molded revetment block 1 after opening the frame is cured and then moved upward by gripping the side surfaces from both sides. Release by lifting or moving to the side.

  DESCRIPTION OF SYMBOLS 1 ... Revetment block, 2 ... Side wall, 3 ... Front wall, 4 ... Groove, 5 ... Contour part, 6 ... Revetment, 7 ... Deep joint, 8, 8a, 8b, 8c, 8d ... Molding formwork apparatus, 9, 9a , 9b, 15, 15a ... bottom mold frame, 10, 10a, 10b, 16, 16a ... side mold frame, 11, 17 ... groove mold frame, 11a ... lower surface of the groove mold frame, 11b ... upper surface of the groove mold frame, 12 ... hinges, 13 ... small pieces, 14 ... hooks, 18 ... sand, A ... foundation work.

Claims (8)

In the revetment block consisting of the front wall and the side wall that forms the periphery of this front wall,
A groove is provided on the entire circumference of the surface of the side wall, and the edge portion closer to the surface of the front wall of the groove is extended to the surface of the front wall. A revetment block characterized by a fixed shape.   The revetment block according to claim 1, wherein the front wall has a sand pattern.   3. The revetment blocks according to claim 1 or 2, wherein the front wall has a rectangular front shape, are stacked by bringing the side walls into contact with each other, and the front wall of each revetment block has a mutual contour. A revetment where a deep seam is formed between them. It consists of a bottom mold for molding the surface of the front wall of the revetment block according to claim 1 or claim 2, and a side mold for standing around the bottom mold to mold the side wall of the revetment block,
On the inner surface of the side mold frame, a groove mold frame having a slope that forms a wedge-shaped undercut portion with the inner surface of the side mold frame with the lower surface facing the bottom mold frame side that forms the front wall of the revetment block A revetment block forming mold apparatus provided over the entire inner peripheral surface of the side mold form. 5. A revetment block forming mold apparatus according to claim 4, wherein each side formwork is movable outward. A bottom mold for molding the back surface of the revetment block according to claim 1, and a side mold for molding a side wall of the revetment block erected so as to be movable outward around each bottom mold,
On the inner surface of the side mold frame, the groove mold frame that forms a wedge-shaped undercut portion with the inner surface of the side mold frame with the upper surface facing the upper side of the side mold frame is the entire inner periphery of the side mold frame. Forming device for revetment block, which is provided over the surface. Concrete is placed in the mold of the revetment block forming mold apparatus according to claim 4, and the concrete in the mold is demolded upward in a low strength state of the concrete,
Forcibly removing the concrete that has entered the undercut part of the groove form provided on the inner peripheral surface of the side form, and extending from the slope of the groove form to the surface of the front wall of the revetment block in the mold in the form A method of forming a revetment block, characterized in that it is crushed into a rough split surface. Concrete is placed in the mold of the revetment block forming mold device according to claim 5 or claim 6, and each side mold is moved outward in a low strength state of the concrete, and the frame is opened.
Forcibly removing the concrete that has entered the undercut part of the groove form provided on the inner peripheral surface of the side form, and extending from the slope of the groove form to the surface of the front wall of the revetment block in the mold in the form A method of forming a revetment block, characterized in that it is crushed into a rough split surface.

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