JP2013052517A - Method for producing block for retaining wall and block for retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a high strength block for a retaining wall, by which filling shortage of a concrete material is eliminated, and to provide a block for a retaining wall.SOLUTION: A formwork 30 of a block 10 for a retaining wall is constituted of a bottom frame 31, side frames 32 which are erected from an edge of the bottom frame 31 and face each other and a core 40 which is stretched between the side frames 32. The concrete material 1 is charged in the formwork 30 from an open surface 34 facing the bottom frame 31 and then mold stamping is performed from an open surface 34 side to produce the block 10 for the retaining wall. In this method for producing the block for the retaining wall, the core 40 is formed of a mountain folding surface 41 formed to about a convex form toward the open surface 34 and a valley folding surface 42 formed to about the convex form toward the bottom frame 31. The charged concrete material 1 is made to slide on the mountain folding surface 41 and is accumulated in the bottom frame 31 and then the accumulated concrete material 1 is inclined and is filled into between the valley folding surface 42 and the bottom frame 31.

Description

  TECHNICAL FIELD The present invention relates to a method for manufacturing a retaining wall block and a retaining wall block that solves the shortage of filling with concrete material.

  Conventionally, the core passed between the sides of the formwork as a method of manufacturing concrete blocks that are retaining walls used for slopes such as roads, railways, slopes such as residential land development sites, or riverwalls There are known a pouring method in which a concrete material having high fluidity is poured from the upper side of the steel and an immediate demolding method in which zero slump concrete material having no fluidity is supplied and compacted by compression. FIG. 5 shows a schematic cross section of a conventional concrete block manufacturing process using zero slump concrete material.

  In the above-described pouring method, a concrete material having high fluidity (slump 3 cm to 10 cm) is poured, so that the filling property of the concrete material is good, and the concrete material is filled between the core and the bottom of the formwork. On the other hand, in the immediate demolding method, as shown in FIG. 5, the zero slump concrete material 100 having no fluidity is supplied. Therefore, the concrete material 100 is hardly filled between the core 400 and the bottom 310 of the mold 300, It becomes difficult to form concrete blocks. Moreover, the deformation | transformation of the concrete block by insufficient filling and the problem of insufficient intensity | strength tend to arise. Then, the manufacturing method of the following concrete block is proposed by the following patent document 1.

  This concrete block manufacturing method is a flat core that is parallel to the bottom frame between the side frames of the mold that is formed in a substantially rectangular parallelepiped with the bottom frame and the side frames that are erected from the edge of the bottom frame. The concrete material that is hardened is supplied from above while giving vibration to this formwork, the bottom frame is raised by a predetermined length, the concrete material is lifted, and then the mold is pushed from above with a press plate. The material is compacted. The solidified concrete block is immediately demolded, and an insertion hole is formed in the trace of the removed core.

  According to this method for producing a concrete block, the concrete material is lifted by raising the bottom frame by a predetermined length, and the concrete material is filled between the bottom frame and the core, so there is no void around the insertion hole. Can produce concrete blocks.

JP 2002-337121 A

  Here, if the present invention is further improved so that the concrete material can be filled between the core and the bottom frame before the bottom frame ascends, that is, at the stage of supply, it is more reliable. It is considered that a high-strength concrete block can be manufactured.

  The present invention has been proposed from the above idea. That is, an object of the present invention is to provide a retaining wall block manufacturing method for manufacturing a retaining wall block having a high strength in which the shortage of filling with concrete material is reliably eliminated, and a retaining wall block.

  To achieve the above object, the present invention provides a retaining wall block comprising a bottom frame, opposing side frames erected from an edge of the bottom frame, and a core passed between the side frames. In the manufacturing method of the retaining wall block, the concrete material is introduced into the mold frame from the open surface facing the bottom frame, and then the retaining wall block is manufactured through the embossing step of embossing from the open surface side. A retaining frame block form formed by a child having a mountain fold surface formed in a substantially convex shape toward the open surface and a valley fold surface formed in a substantially convex shape toward the bottom frame. Use, filling the charged concrete material on the mountain fold surface and accumulating in the bottom frame, tilting the accumulated concrete material and filling between the valley fold surface and the bottom frame, Including.

  In the embossing step, flat surfaces parallel to the open surface and the bottom frame are respectively formed on the mountain fold surface and the valley fold surface of the mold frame of the retaining wall block, and the concrete material is interposed therebetween. Pressure is applied to the flat surface.

  Further, the retaining wall block is formed with a reinforcing bar connecting hole penetrating from the upper surface portion to the lower surface portion, and the reinforcing bar connecting hole is formed in a substantially convex shape toward the back surface portion orthogonal to the upper surface portion and the lower surface portion. It is formed from the mountain fold part made and the valley fold part formed in the substantially convex shape toward the front part parallel to the said back part.

  Further, the mountain fold and the valley fold are formed with flat portions parallel to the back portion and the front portion, respectively.

  A retaining wall block comprising a bottom frame, opposing side frames erected from an edge of the bottom frame, a core provided in the side frame, and an open surface facing the bottom frame. In the mold, the core is formed of a mountain fold surface formed in a substantially convex shape toward the open surface and a valley fold surface formed in a substantially convex shape toward the bottom frame, and the mountain fold surface Further, it is preferable to use a retaining wall block mold in which a flat surface parallel to the open surface and the bottom frame is formed on the valley folding surface.

  According to the method for manufacturing a retaining wall block and the retaining wall block according to the present invention, insufficient filling of the concrete material can be eliminated, and the strength of the retaining wall block can be increased.

It is a figure which shows one Embodiment of the block for retaining walls based on this invention, (a) is a watermark perspective view, (b) is a top view. It is a schematic perspective view which shows the outline of the formwork for manufacturing the block for retaining walls which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is an expansion schematic explanatory drawing which expands and shows the mode of the core vicinity in the filling process of the manufacturing method of the retaining wall block which concerns on this invention, (a) is a figure in the middle of filling of a concrete material, (b) is a concrete material. (C) is a figure after the completion of filling. It is a figure which shows other embodiment of the block for retaining walls based on this invention, (a) is a watermark perspective view, (b) is XX sectional drawing of (a). It is a schematic sectional explanatory drawing explaining the outline of the manufacturing process of the conventional concrete block by a zero slump concrete material.

  EMBODIMENT OF THE INVENTION Below, one Embodiment of the block for retaining walls which concerns on this invention is described based on drawing.

  1A and 1B, a retaining wall block 10 according to this embodiment includes an upper surface portion 11 and a lower surface portion 12, and sides (long sides) in the width direction of the upper surface portion 11 and the lower surface portion 12. The front surface portion 13 and the back surface portion 14 which are orthogonal to each other and the side surface portions 15 which are orthogonal to the side (short side) in the thickness direction are formed in a substantially rectangular parallelepiped shape. The reinforcing bar connecting hole 20 penetrating from the upper surface portion 11 to the lower surface portion 12 is penetrated in the height direction of the retaining wall block 10.

  In the middle of the upper surface portion 11 in the thickness direction (short side direction), a semicircular upper convex portion 11 a extending in the width direction (long side direction) is intermittently interrupted so as to avoid the opening 23 of the reinforcing bar connecting hole 20. The lower surface 12 is formed with a semicircular lower concave portion 12a corresponding to the upper convex portion 11a continuously in the width direction (long side direction). A semicircular side recess 15a connected to the lower recess 12a is continuously formed in the both side surface portions 15 in the height direction. In addition, a dehash anchor (not shown) for fishing with a wire is embedded in the approximate center of the upper surface part 11, and a pipe installation path (not shown) for draining water after construction is formed on one of the side surface parts 15. The front portion 13 is decorated with, for example, a natural stone pattern such as granite (not shown) or an artificial pattern. During construction, the upper convex portion 11a and the lower concave portion 12a fit together the retaining wall blocks 10 stacked vertically, and the side concave portion 15a joins the retaining wall blocks 10 arranged side by side. It becomes the filling part of concrete.

  The opening 23 of the reinforcing bar connecting hole 20 is located at a position close to the upper surface portion 11 and the lower surface portion 12 by approximately a quarter in the width direction (long side direction) from both ends of the center in the thickness direction (short side direction). Is formed.

  The cross section of the reinforcing bar connecting hole 20 is formed in a substantially diamond shape. That is, the inner side surface portion of the reinforcing bar connecting hole 20 includes a mountain fold portion 21 formed in a substantially convex shape toward the back surface portion 14, a valley fold portion 22 formed in a substantially convex shape toward the front portion 13, and a side surface portion. 15 and a connecting portion 26 formed in a substantially convex shape.

  The mountain fold portion 21 has one end approaching the back portion 14 side and the other end being separated from each other toward the front portion 13 side, and one end of the mountain fold portion 21a is connected to and parallel to the back portion 14. It is comprised from the mountain side flat part 21b formed in this. Similarly, the valley fold portion 22 is connected to the valley fold slope portion 22a, the other end of which is separated from each other on the back surface portion 14 side, and the other end is close to each other on the front portion 13 side. And a valley-side flat portion 22 b formed in parallel with the portion 13. The connecting portion 26 gently connects the other ends of the mountain fold slope portion 21a and the valley fold slope portion 22a.

  Since the concrete material 1 is filled between the valley fold portion 22 and the front portion 13 without a gap as described later, the strength of the retaining wall block 10 is increased.

  The retaining wall block 10 is configured as described above. Next, an outline of the mold 30 for manufacturing the retaining wall block 10 will be described with reference to the drawings.

  In FIG. 2, the mold 30 is formed in a substantially rectangular parallelepiped shape having an open surface 34 on one surface, and a core 40 is passed between the side surfaces. The mold frame 30 includes a bottom frame 31, a long side frame 32 erected from the long side edge of the bottom frame 31, and a short side frame 33 erected from the short side edge of the bottom frame 31. The core 40 is formed so as to penetrate from one long side frame 32 to the other long side frame 32 between the long side frames 32 facing each other. Although not shown, the long side frame 32 is formed with an uneven portion forming the upper convex portion 11a and the lower concave portion 12a of the retaining wall block 10, and the short side frame 33 is formed with a convex portion forming the side concave portion 15a. (See FIG. 1 (a)). Further, the bottom frame 31 is provided with unevenness (not shown) for decorating the front portion 13 of the retaining wall block 10 with a granite pattern or the like. The concrete material 1 supplied to the mold 30 is stamped from above by a stamping plate 35 that is formed to have approximately the same size as the open surface 34 of the mold 30.

  2 and 3A, the core 40 is formed in a substantially rhombic cross section. That is, the outer surface of the core 40 includes a mountain fold surface 41 formed in a substantially convex shape toward the open surface 34, a valley fold surface 42 formed in a substantially convex shape toward the bottom frame 31, and a short side frame. It is comprised from the connection surface 43 formed in the substantially protruding item | line toward 33. As shown in FIG.

  The mountain fold surface 41 is formed parallel to the open surface 34 by connecting one end of the mountain fold slope 41a with one end approaching the open surface 34 side and the other end being separated from each other toward the bottom frame 31 side. It is comprised from the made mountain side flat surface 41b. Similarly, the valley folding surface 42 is connected to a valley folding slope 42a whose other ends are separated from each other on the open surface 34 side and one end is close to each other toward the bottom frame 31, and one end of the valley folding surface 42 is connected to each other. And a valley-side flat surface 42 b formed in parallel to the frame 31. The connecting surface 43 smoothly connects the other ends of the mountain fold slope 41a and the valley fold slope 42a.

  As shown in FIG. 3B, the region from the bottom frame 31 to the core 40 is gradually separated from the bottom frame 31 by the valley folding surface 42 from the valley side flat surface 42b side to the connecting surface 43 side. This is a guide area A (shaded portion) formed so as to expand.

  The mold 30 is configured as described above. Next, an embodiment of a method for manufacturing a retaining wall block according to the present invention using the mold 30 will be described with reference to the drawings.

  First, as shown in FIG. 2, a supply device (not shown) such as a hopper for supplying the concrete material 1 to the mold 30 by forming the transfer mold 30 by passing the core 40 between the long frames 32. Zero slump concrete material 1 is put into

  Next, as a filling process, in FIGS. 2 and 3A, the supply device is slid between the long side frames 32 along the open surface 34 of the mold 30, and the concrete material 1 is universally placed on the mold 30. Supply without. When the concrete material 1 is supplied from the open surface 34 into the mold 30, a part of the concrete material 1 hits the core 40. Therefore, a part of the concrete material 1 is accumulated in the bottom frame 31 by detouring by sliding down the mountain folding slope 41 a of the mountain folding surface 41 constituting the core 40, and the valley folding surface 42 and the bottom frame constituting the core 40. A slight gap 2 is formed between the gap 31 and the gap 31.

  Since the concrete material 1 is a zero slump powder body having no fixed shape in principle, it is formed along the shape of the mold 30, but forms a hill portion 1 a because it is a free end around the gap 2. As for the hill part 1a, the collar part 1b is extended to the space | gap 2 along the bottom frame 31, and if the supplied concrete material 1 is accumulate | stored in the bottom frame 31, the height of the hill part 1a will increase, and the collar part 1b will be eventually built. Leans toward. Since the flange 1b extends toward the gap 2 by the amount of inclination of the concrete material 1, the gap 2 is filled from the bottom frame 31 side (see FIG. 3B).

  In particular, in this embodiment, as shown in FIG. 3B, the guide area A (shaded portion) is formed by the valley fold surfaces 42 that constitute the core 40, so that the concrete material 1 is made into the gap 2. Easy to fill. Since the guide area A is formed so as to gradually increase away from the bottom frame 31 from the valley side flat surface 42b side to the connecting surface 43 side, the concrete material 1 is supplied to the mold frame 30. If it continues, the height of the hill part 1a will increase more. The hill part 1a whose height has increased is inclined toward the gap 2 and becomes a flange part 1b. In addition, the ridge 1b further extends toward the center of the gap 2 by the inclined hill 1a. As a result of this being repeated, the concrete material 1 fills the gap 2 from the bottom frame 31 side, there is no gap between the valley fold surface 42 and the bottom frame 31, and the filling is completed (see FIG. 3C).

  Next, in FIG. 2 and FIG. 3 (c), as the stamping process, the pressing plate 35 is lowered and pressed from the open surface 34 side of the mold 30, and the concrete material 1 supplied to and filled in the mold 30 is loaded. Emboss. The pressure at the time of this embossing is formed on the mountain fold surface 41 and the valley fold surface 42 of the core 40 through the concrete material 1, and the mountain side flat surface 41 b and the valley side flat surface parallel to the open surface 34 and the bottom frame 31. In addition to the surface 42b, the concrete material 1 filled between the crest-side flat surface 41b and the embossing plate 35 and between the trough-side flat surface 42b and the bottom frame 31 is embossed.

  In particular, since the concrete material 1 is filled without gaps between the valley fold surface 42 and the bottom frame 31 through the filling process described above, the concrete material 1 is embossed by applying pressure during the embossing with certainty. To do.

  Thereafter, the embossing plate 35 is raised, the core 40 is removed and removed, and the retaining wall block 10 is manufactured by immediately removing it from the mold 30.

  When the concrete material 1 is supplied to the mold 30 or when it is embossed with the embossing plate 35, the mold 30 and the embossing plate 35 may be vibrated by a vibration mechanism. By vibration, the concrete material 1 is filled in every corner of the mold 30 without any gaps, and the slope 1 of the hill 1a is urged to ensure that the concrete 1 is placed in the valley folding surface 42 of the core 40 and the bottom of the mold 30. A high strength retaining wall block 10 can be manufactured by filling between the frame 31 and the frame 31.

  In addition, there may be provided an ascending step for raising the bottom frame 31 between the filling step and the embossing step, that is, after supplying the concrete material 1 to the mold 30 and before embossing with the embossing plate 35. Good. By ascending the bottom frame 31, the concrete material 1 is filled without gaps between the valley folding surface 42 of the core 40 and the bottom frame 31 of the mold frame 30, and the high strength retaining wall block 10 is manufactured. Can do.

  As described above, according to the embodiment of the retaining wall block 10 and the retaining wall block manufacturing method according to the present invention, the concrete material between the valley folded surface 42 of the core 40 and the bottom frame 31 of the mold 30. Therefore, the retaining wall block 10 having high strength can be provided.

  Further, the core 40 is formed of a mountain fold surface 41 formed in a substantially convex shape toward the open surface 34 and a valley fold surface 42 formed in a substantially convex shape toward the bottom frame 31. With this configuration, the concrete material 1 supplied from the open surface 34 slides down the mountain folding surface 41 of the core 40, so that it does not accumulate on the mountain folding surface 41.

  In addition, since the guide region A is formed by the valley folding surface 42 that constitutes the core 40, the concrete material 1 can be easily filled in the gap 2. The guide area A is formed so as to be gradually separated from the bottom frame 31 and become higher from the valley side flat surface 42b side toward the connecting surface 43 side. With this configuration, when the concrete material 1 is continuously supplied to the formwork 30 and the height of the hill portion 1a is further increased, the inclined portion 1b can be further extended toward the center of the gap 2 by the inclined concrete material 1. . A large amount of the concrete material 1 can be tilted toward the gap 2 by an amount corresponding to the increase in height. Therefore, the concrete material 1 can fill the space 2 from the bottom frame 31 side, and the concrete material 1 can fill the gap between the valley surface 42 and the bottom frame 31 without a gap.

  In the present embodiment, the mountain-folded surface 41 is formed with a mountain-side flat surface 41b, and the valley-folded surface 42 is formed with a valley-side flat surface 42b. With this configuration, it is possible to apply the pressure to the mountain side flat surface 41b and the valley side flat surface 42b orthogonal to the direction of pressing without releasing the pressure during the pressing. Therefore, the concrete material 1 can be sufficiently embossed between the mountain side flat surface 41 b and the embossing plate 35 and between the valley folding surface 42 and the bottom frame 31. In particular, since the concrete material 1 is filled without gaps between the valley fold surface 42 and the bottom frame 31 through the filling process, the concrete material 1 can be embossed by applying pressure at the time of embossing with certainty. it can. Therefore, the high strength retaining wall block 10 can be manufactured.

  Next, another embodiment of the retaining wall block according to the present invention will be described with reference to the drawings. Only the configuration different from the above-described embodiment will be described, and the description of the overlapping configuration will be omitted.

  4 (a) and 4 (b), the reinforcing bar connecting hole 120 provided in the retaining wall block 110 has an upper surface opening 23a in which an edge that opens to the upper surface 111 expands and gradually decreases toward the inside. The lower surface opening 23b is formed in which the edge opening to the lower surface portion 112 has an enlarged diameter and gradually decreases in diameter toward the inside. The reinforcing bar connecting hole 120 is formed in a tapered shape having a diameter reduced from the upper surface opening 23a toward the lower surface opening 23b.

  As described above, according to another embodiment of the retaining wall block according to the present invention, since the upper surface opening 23a and the lower surface opening 23b are formed, the area of the padded concrete to be filled at the time of construction is increased. Coupling force between the retaining wall blocks 110 stacked is increased. Further, since the reinforcing bar connecting hole 120 is formed in a taper shape, it acts like a funnel, and the filled concrete is surely flowed down.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment. The present invention can be modified in various ways without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 1,100 Concrete material 1a Hill part 1b Ridge part 2 Cavity 10, 110 Retaining wall block 11, 111 Upper surface part 11a Upper convex part 12, 112 Lower surface part 12a Lower concave part 13 Front part 14 Rear part 15 Side part 15a Side concave part 20 , 120 Reinforcing bar connection hole 21 Mountain folded portion 21a Mountain folded oblique portion 21b Mountain side flat portion 22 Valley folded portion 22a Valley folded oblique portion 22b Valley side flat portion 23 Opening portion 23a Upper surface opening portion 23b Lower surface opening portion 26 Connecting portion 30, 300 Formwork 31 , 310 Bottom frame 32 Long side frame 33 Short side frame 34 Open surface 35 Mold pressing plate 40, 400 Core 41 Mountain folded surface 41a Mountain folded slope 41b Mountain side flat surface 42 Valley folded surface 42a Valley folded slope 42b Valley side flat surface 43 Connecting surface A Information area

Claims (4)

From the open surface facing the bottom frame to the mold of the retaining wall block composed of a bottom frame, opposing side frames standing up from the edge of the bottom frame, and a core passed between the side frames In the manufacturing method of the retaining wall block for producing the retaining wall block through the embossing step of embossing from the open surface side after the concrete material is charged,
The retaining wall block mold in which the core is formed of a mountain folded surface formed in a substantially convex shape toward the open surface and a valley folded surface formed in a substantially convex shape toward the bottom frame. Using a frame, the charged concrete material is slid on the mountain fold surface and accumulated in the bottom frame, and the accumulated concrete material is tilted and filled between the valley fold surface and the bottom frame. ,
including,
A method for manufacturing a retaining wall block. In the embossing step, flat surfaces parallel to the open surface and the bottom frame are respectively formed on the mountain fold surface and the valley fold surface of the mold of the retaining wall block, and the flat surface is formed through the concrete material. Apply pressure to the surface,
The manufacturing method of the block for retaining walls of Claim 1 characterized by the above-mentioned. A retaining wall block in which a reinforcing bar connecting hole penetrating from the upper surface portion to the lower surface portion is formed,
The reinforcing bar connecting hole is formed in a substantially convex shape toward a front part parallel to the back surface part and a mountain fold part formed in a substantially convex shape toward the back part perpendicular to the upper surface part and the lower surface part. Formed from valley folds,
Retaining wall block characterized by that. In the mountain fold part and the valley fold part, a flat part parallel to the back part and the front part was formed, respectively.
The retaining wall block according to claim 3.

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