JP2020139267A - Concrete manufacture and manufacturing method thereof - Google Patents

Abstract

To provide a corner block capable of flexibly constructing a corner part of a retaining wall provided with a slope on a surface.SOLUTION: A concrete corner block 5 for constructing a corner part is provided with: a first concrete wall body 10 and a second concrete wall body 20 placed on the right and the left adjacently to each other; and a plurality of joint bodies 30 connecting adjacent end parts of the first wall body and the second wall body and buried in a vertically scattered manner to change an angle between the first wall body and the second wall body. The plurality of joint bodies 30 comprise a plurality of joint bodies 31 to 35 whose buried depths d1 to d5 relative to outer walls 12 and 22 of the first wall body and the second wall body are vertically different.SELECTED DRAWING: Figure 1

Description

The present invention relates to a concrete product used as a retaining wall and a method for manufacturing the same.

Patent Document 1 discloses a corner block in which a corner portion of a retaining wall can be easily constructed. This corner block is buried between the first and second concrete walls arranged on the left and right, and the walls are connected to each other so that the angle of the corner can be changed. It has a connecting body to make it possible to adjust the angle of the first wall body and the second wall body according to the corner of the retaining wall.

JP-A-2007-247388

Reinforcing bars are embedded in the concrete retaining wall at a depth parallel to the outer and / or inner surfaces to ensure strength. For example, a reinforcing bar that secures the strength on the outer surface side is embedded at a depth of about 40 mm from the outer surface, and a reinforcing bar that secures the strength on the inner surface side is embedded at a depth of about 60 mm from the inner surface. Therefore, the connecting body connecting the left and right wall bodies at the corner of the retaining wall is also usually buried in parallel with the outer surface of the retaining wall on the extension line of these reinforcing bars. In this corner block, the rotation axes of the outer surface of the retaining wall and the wall bodies arranged on both sides of the corner portion must be parallel.

One of the aspects of the present invention is a concrete product for constructing a corner portion of a retaining wall, which is a concrete first wall body and a second wall body arranged adjacent to each other on the left and right sides, and a first wall body. A plurality of connecting bodies in which adjacent ends of the first wall body and the second wall body are connected to each other and are dispersed vertically so as to change the angle formed by the first wall body and the second wall body. It has a plurality of connecting bodies having different burial depths with respect to at least one outer surface of the first wall body and the second wall body.

In this concrete product, the inclination of the rotation axis between the first wall body and the second wall body is independently changed by changing the embedding depth of the connecting body with respect to the outer surface (outer wall surface) of the retaining wall up and down. , Can be set flexibly. For example, in a retaining wall installed along a slope, a concrete product whose angle can be freely set even in a corner where one wall is arranged horizontally and the other wall is arranged along the slope. Can be provided.

One of the useful forms of this concrete product is a concrete product in which a plurality of connecting bodies are embedded so that the burial depths with respect to the outer surfaces of both the first wall body and the second wall body are different in the vertical direction. .. The inclination of the rotation axis of the first and second wall bodies can be set independently with respect to the inclination of the outer surface of the first and second wall bodies. An example is in a first and second wall body in which the outer surface is inclined inward toward the upper side (the lower part is inclined so as to protrude outward, and the upper part is inclined so as to recede). The plurality of connecting bodies are concrete products that are buried so that the buried depth of the lower connecting body is larger (deeper) than the buried depth of the upper connecting body. Even in a retaining wall block for a corner having a wall body whose outer surface is inclined in this way, a plurality of connecting bodies can be arranged in the vertical direction, and the first and second wall bodies are rotated by a vertical rotation axis. However, it is possible to construct a retaining wall including corners with flexible angles.

The concrete product is an outer groove formed by a part of the end faces of the first wall body and the second wall body adjacent to each other, and further has an outer groove having different depths with respect to the outer surface. You may be doing it. After constructing the corner portion, the outer groove may be filled with mortar or the like. The concrete product is an inner groove formed by a part of the end faces of the first wall body and the second wall body adjacent to each other, and has a substantially V-shaped cross section with the side of the plurality of connections as the apex. It may further have a groove on the inside of the. When the angle of the corner portion is changed, it is possible to prevent the adjacent ends of the wall body from interfering with each other. Further, the inner groove may also be filled with mortar or the like after the corner portion is constructed. The plurality of connections may be reinforcing bars.

One of the other aspects of the present invention is a method of constructing a retaining wall, which comprises a step of constructing a corner portion by a first wall body and a second wall body of the concrete product described above.

One of yet different other embodiments of the present invention is a retaining wall having a corner portion including a first wall body and a second wall body of the concrete product described above.

One of the different other forms of the present invention is a method for manufacturing a concrete product having a first wall body and a second wall body arranged adjacent to each other on the left and right sides of a corner portion. In this manufacturing method, the first wall body is formed so that the distance to the bottom surface is different in the vertical direction of the concrete product in the formwork including the bottom surface for integrally molding the outer surfaces of the first wall body and the second wall body. And the process of presetting a plurality of connecting bodies for connecting the second wall body, the process of injecting concrete into the formwork and integrally molding the first wall body and the second wall body, and from the formwork. It has a step of separating the boundary between the first wall body and the second wall body when the concrete product is demolded.

In this method for manufacturing a concrete product, the first wall body and the second wall body can be integrally formed, and a plurality of connecting bodies are connected to the outer surfaces of the first wall body and the second wall body. Can manufacture concrete products with different burial depths.

A step of arranging a first auxiliary formwork having a different amount of protrusion from the bottom surface in the vertical direction along the boundary may be provided on the bottom surface of the formwork. A second auxiliary formwork for forming a substantially V-shaped tapered surface inward along the boundary between the first wall body and the second wall body is arranged at a position facing the first auxiliary formwork. It may have a step to do. The bottom surface of the formwork is installed so that the lower side of the concrete product is vertically lower than the upper side of the concrete product, and in the process of setting the manufacturing method, the distances of the plurality of connections to the bottom surface are set to the upper side. It may include a step of setting so that the lower side is larger than the other.

One of the further different forms of the present invention is a formwork for manufacturing a concrete product having a first wall body and a second wall body arranged adjacent to each other on the left and right sides of a corner portion. This formwork is made of concrete provided along the boundary between the bottom surface, which integrally molds the outer surfaces of the first wall body and the second wall body, and the first wall body and the second wall body on the bottom surface. It has a first auxiliary mold in which the amount of protrusion from the bottom surface differs in the vertical direction of the product, and a second auxiliary mold for forming a tapered surface inward along the boundary. The formwork may be installed so that the bottom surface is lower in the vertical direction with respect to the upper side of the concrete product.

A perspective view of the corner of the retaining wall as seen from the outside. A perspective view of the corner block from the inside (behind). A side view of the first wall body of the corner block as viewed from the corner direction (III-III). IV-IV cross-sectional view of the first wall of the corner block. A state of constructing a corner part of a retaining wall using a corner block is shown, FIG. 5 (a) shows a state of constructing a retaining wall having a 110 degree corner, and FIG. 5 (b) shows a state of constructing a 90 degree corner. FIG. 5C shows a state of constructing a retaining wall provided, and FIG. 5C is a diagram showing a state of constructing a retaining wall provided with a corner of 70 degrees. A perspective view showing a formwork for manufacturing a corner block. Sectional drawing of formwork (VII-VII cross section). A cross-sectional view showing a state in which a connecting body is arranged in a formwork and concrete is injected. A cross-sectional view showing a state in which a connecting body is arranged in a formwork and concrete is injected from another direction (IX-IX cross section). A cross-sectional view showing a state in which a corner block is caught and a first wall body and a second wall body are separated. It is a figure which shows a different example of a corner block. It is a figure which shows a further different example of a corner block.

1 and 2 show an example of a concrete product. This concrete product is a corner block 5 for constructing the corner portion 2 of the concrete retaining wall 1, and is adjacent to the first concrete wall body 10 and the left or right of the first wall body 10. It has a second wall body 20 made of concrete and a plurality of connecting bodies 30 for connecting the adjacent end portions 11 and 21 of the first wall body 10 and the second wall body 20 to each other. The corner block 5 of this example has five connecting bodies 31 to 35 which are vertically dispersed and embedded. FIG. 1 is a perspective view of the corner portion 2 as viewed from the outside (front, front) 8. FIG. 2 is a perspective view of the corner portion 2 as viewed from the inside (rear, back) 7, the first wall body 10 is arranged on the left side of the corner 3 when viewed from the outside 8, and the second wall body is on the right side. 20 are arranged. The first wall body 10 and the second wall body 20 are installed so as to form a predetermined angle θ in a state of being connected by the connecting body 30, and the corner portion 2 of the retaining wall 1 is constructed.

The outer surfaces (outer wall surfaces) 12 and 22 of both the first wall body 10 and the second wall body 20 are inclined inward toward the upper side, that is, the lower side extends to the outer side 8 with respect to the upper side. A receding slope (gradient) 9 is provided on the upper side. Therefore, by using this corner block (concrete product) 5, the retaining wall 1 including the corner portion 2 as a whole has less oppressive feeling when viewed from the outside 8, and gives an excellent impression of stability. It can be constructed and provided as a wall 1.

The plurality of connecting bodies 30 are buried so that the burial depths d1 to d5 with respect to the outer surfaces 12 and 22 of both the first wall body 10 and the second wall body 20 are different in the vertical direction. Specifically, it is buried so that the burial depth d5 of the lower connecting body 35 is larger (deeper) than the burying depth d1 of the upper connecting body 31. The burial depths d1 to d5 of the connecting bodies 31 to 35 are the outer grooves 39 formed by the outer parts of the end faces 13 and 23 adjacent to each other of the first wall body 10 and the second wall body 20. It appears as a depth (width) with respect to the outer surfaces 12 and 22, and the depths d1 to d5 are different between the upper and lower surfaces. That is, the lower width (depth) W2 is wider (deeper) than the upper width (depth) W1 of the outer groove 39.

The connecting body 30 (31 to 35) can be deformed to such an extent that the first wall body 10 and the second wall body 20 can be turned around each other when the corner portion 2 is constructed. Yes (plastic and flexible), on the other hand, it is desirable that the strength is sufficient so that the mutual positions do not easily change during construction of the foundation. A typical connection body 30 is a reinforcing bar having an appropriate thickness, for example, a diameter of about 10 to 15 mm.

The gradient 9 such that the lower ends of the outer surfaces 12 and 22 of the walls 10 and 20 protrude to the outside 8, the lower side expands, and the upper side recedes inward 7 may be about 1 to 5%, and 2 to 4 It may be about%, and a typical gradient 9 is 3%. The burial depths d1 to d5 of the connecting bodies 31 to 35 are set large on the lower side so as to cancel the gradient 9. In the corner block 5, the outer surfaces 12 and 22 rotate the walls 10 and 20 connected to the upper and lower sides by changing the buried depths d1 to d5 of the connecting bodies 31 to 35 with respect to the gradient 9. The angle of the shaft 51 can be set independently. Therefore, in this corner block 5, even if the outer surfaces 12 and 22 have a gradient 9, the rotation axis 51 connecting the connecting bodies 31 to 35 vertically is set in the vertical direction (vertical direction) in which the gradient 9 is offset. The walls 10 and 20 can be rotated with respect to a horizontal surface. Therefore, the wall bodies 10 and 20 can be rotated with respect to the horizontal foundation (foundation concrete, not shown) of the retaining wall 1, and the corner portion 2 in which they intersect at a desired angle θ can be easily constructed.

In the corner block 5 of this example, the surfaces (inner surfaces) 14 and 24 of the inner side 7 of the wall bodies 10 and 20 are vertical surfaces and are not provided with a gradient. These surfaces 14 and 24 may have a slope with the upper side retracted (the upper side tilted outward 8 and the lower side protruding inward 7), similar to the outer surfaces 12 and 22. The corner block 5 includes an inner groove 38 composed of a part 13b and 23b inside the end faces 13 and 23 adjacent to each other of the first wall body 10 and the second wall body 20. The groove 38 has a substantially V-shaped cross section with the side of the plurality of connecting bodies 30 as the apex, and when the wall bodies 10 and 20 are rotated (turned) around the plurality of connecting bodies 30 Adjacent end faces 13 and 23 of the walls 10 and 20 are prevented from interfering with each other.

FIG. 3 shows a state in which the first wall body 10 of the corner block 5 is viewed from the side surface (end surface) 13 of the corner portion 2. FIG. 4 shows a cross section of the end portion 11 of the first wall body 10. An example of the wall body 10 has a height of 2 m, a width of the upper end 15 of 200 mm, a width of the lower end surface 16 of 260 mm, and a gradient 9 of the outer surface 12 of 3%. The reinforcing bar 55 on the outer surface 12 side is buried at a depth of about 40 mm parallel to the outer surface 12, and the reinforcing bar 56 on the inner surface 14 side is buried at a depth of about 100 mm parallel to the inner surface 14. There is. On the other hand, among the plurality of connecting bodies 30, the uppermost connecting body 31 is embedded at a position (depth) d1 of about 40 mm from the outer surface 12, and the lowermost connecting body 35 is located at a position of about 100 mm from the outer surface 12 (depth). Depth) The connecting bodies 32 to 34 embedded in d5 and located between them are buried in positions (depth) d2 to d4 along the rotation axis 51 connecting the connecting bodies 31 and 35. Therefore, although the outer surface 12 of the wall body 10 is tilted at a gradient 9, the rotating shaft 51 connecting the connecting bodies 31 to 35 connecting the wall bodies 10 and 20 extends (extends) substantially vertically, and the wall body 10 and 20 can be rotated around a rotation shaft 51 extending in the vertical direction. Therefore, by installing the wall bodies 10 and 20 of the corner block 5 on a horizontal foundation and arranging them at an angle that matches the site in a state where they are connected by the connecting body 30, the angle is suitable for the site. A retaining wall 1 including an intersecting corner portion 2 can be constructed.

The height of the wall body 10, the size (width) of the upper end surface 15 and the lower end surface 16 are examples, and are generally determined in consideration of the strength with respect to the height of the wall body 10, the proof stress against earth pressure, and the like. The width of the upper end surface 15 is narrower than the width of the lower end surface 16, thereby determining the gradients of the outer surface 12 and the inner surface 14. The same applies to the other wall body 20. Further, the gradient of the inner surface 14 may be 0%, may be smaller than the gradient 9 of the outer surface 12, may be larger, and may be determined depending on the design of the upper end surface 15 with respect to the lower end surface 16. ..

The corner block 5 further includes a foundation portion 40 provided below the first wall body 10 and the second wall body 20 so as to extend inward 7 from the wall bodies 10 and 20, respectively. The respective wall bodies 10 and 20 and the foundation portion 40 are configured to form an L-shape, and as a whole, the block is suitable for constructing an L-shaped retaining wall (L-shaped retaining wall). There is. Specifically, the base portion 40 of the corner block 5 of this example includes a plurality of reinforcing bars 42 extending (protruding) in the horizontal direction from the lower end edge of the inner side 7 of the wall bodies 10 and 20. An important function of the retaining wall 1 is to counter the earth pressure of the inner 7 and for that purpose it is necessary to provide a foundation of sufficient length in the horizontal direction. On the other hand, in the corner portion 2, the foundations extending from the wall bodies 10 and 20 may interfere with each other depending on the angle θ formed by the wall bodies 10 and 20.

FIG. 5 shows a state in which the corner portion 2 having a different angle θ is constructed depending on the wall bodies 10 and 20. FIG. 5A shows an angle θ of 110 degrees, FIG. 5B shows an angle θ of 90 degrees, and FIG. 5C shows an angle θ of 70 degrees. When constructing the corner portion 2 at the site, as shown by the broken line, the angle is constructed by placing concrete including the area where the reinforcing bars 42 extending from the wall bodies 10 and 20 overlap each other and constructing the foundation 45. A retaining wall 1 having a predetermined proof stress can be constructed regardless of θ.

Further, the outer groove 39 composed of the outer portions 13a and 23a of the adjacent end faces 13 and 23 of the wall bodies 10 and 20 may be filled with mortar 49 or the like after construction. Similarly, the inner groove 38 composed of the inner portions 13b and 23b of the adjacent end faces 13 and 23 of the walls 10 and 20 may be filled with mortar 49 or the like after construction. As described above, the outer groove 39 has a smaller (shallow) upper width (depth) W1 than a lower width (depth) W2. Therefore, the depth of the mortar 49 that fills the groove 39 is large on the lower side and small on the upper side, and has a shape like a triangular prism or a triangular pyramid, so that it is stable and difficult to peel off.

Further, a gap 37 is provided between the end surface 13 of the first wall body 10 and the end surface 23 of the second wall body 20 in order to secure a space in which the connecting body 30 is exposed and deformed. Alternatively, the gap 37 may be filled by pouring the mortar 49. The width of the gap 37 may be about 5 to 25 mm, more preferably about 10 to 15 mm.

The configuration of the foundation portion 40 of the corner block 5 shown here is an example. A bottom plate portion serving as a concrete foundation is provided from the wall bodies 10 and 20, and a reinforcing bar 42 for the foundation protrudes from the bottom plate portion. May be good. Further, even if the foundation is prefabricated with concrete in advance at the minimum angle θ assumed as the corner portion 2 and does not interfere with each other, and the foundation has a type in which the reinforcing bars do not protrude. Good.

6 and 7 show an example of a mold for manufacturing the corner block 5. This formwork 60 has a bottom surface 62 having a gradient 9 so as to integrally mold the outer surfaces 12 and 22 of the first wall body 10 and the second wall body 20, and a first of the bottom surface 62, which is square as a whole. The outer boundary between the wall body 10 and the second wall body 20, that is, the protrusion (first auxiliary formwork) 65 provided along the position corresponding to the outer groove 39, and the outer groove 39. On the opposite side, a second auxiliary formwork 66 for forming an inner groove 38 having a substantially V-shaped tapered surface on the inside along the boundaries of the walls 10 and 20 is included. The height (width) of the side plate 61 surrounding the bottom surface 62 of the formwork 60 is provided so as to secure a predetermined thickness of the corner block 5 corresponding to the gradient 9, and the upper side plate 63 is the width of the upper end surface 15. The lower side plate 64 is provided so as to secure the width of the lower end surface 16. The first auxiliary formwork 65 has a different amount of protrusion from the bottom surface 62 in the vertical direction of the corner block 5 which is a concrete product, and protrudes from the bottom surface 62 by an amount that cancels the gradient 9 of the bottom surface 62. Further, the formwork 60 includes a base (frame) 69 for installing the bottom surface 62 so that the lower side of the concrete product is vertically lower than the upper side of the concrete product. The frame 69 installs the formwork 60 so that the bottom surface 62 is tilted at a gradient 9 and the upper side of the side plate 61 is horizontal.

When manufacturing the corner block 5 using this formwork 60, as shown in FIG. 7, the distance (buried depth) with respect to the bottom surface 62 in the vertical direction of the corner block 5 along the first auxiliary formwork 65. ) The connecting body 30 (31 to 35) is set in advance so that d1 to d5 are different. Prior to this step, the amount of protrusion from the bottom surface 62 differs from the bottom surface 62 of the mold 60 in the vertical direction along the outer groove 39 serving as a boundary according to the slope 9 of the outer surface of the corner block 5 to be manufactured. It may have a step of arranging the first auxiliary formwork 65. Further, the bottom surface 62 of the formwork 60 is installed by the frame 69 so that the lower side (the side of the lower side plate 64) is lower in the vertical direction with respect to the upper side (the side of the upper side plate 63) of the corner block 5. The connecting body 30 is set so that the distances d1 to d5 of the plurality of connecting bodies 31 to 35 with respect to the bottom surface 62 are larger on the lower side than on the upper side.

Further, along the boundary between the first wall body 10 and the second wall body 20, a second auxiliary formwork 66 for forming a substantially V-shaped tapered surface to be a groove 38 is provided inside. It is arranged at a position facing the auxiliary formwork 65 of the above. As a result, the reinforcing bars to be the plurality of connecting bodies 30 are set in a state of being sandwiched between the first auxiliary formwork 65 and the second auxiliary formwork 66. Further, the reinforcing bars 55 and 56 described with reference to FIG. 4 are arranged inside the formwork 60 and are embedded in the corner block 5 together with the connecting body 30, and the reinforcing bars 55 and 56 are illustrated and described. Is omitted. Further, the reinforcing bars 42 of the foundation 40 are also buried at the same time, but illustration and description thereof will be omitted.

Next, as shown in FIG. 8, concrete 70 is injected into the mold 60 to integrally mold the corner block 5 including the first wall body 10 and the second wall body 20. In this corner block 5, connecting bodies 30 (31 to 35) are embedded along the boundaries of the wall bodies 10 and 20 at different depths from the outer surfaces 12 and 22, and an auxiliary formwork is embedded outside along the boundaries. The groove 39 is formed by 65, and the groove 38 is formed inside by the second auxiliary formwork 66.

After that, as shown in FIG. 9, the second auxiliary formwork 66 is removed, and as shown in FIG. 10, the corner block 5 is removed from the formwork 60. At this time, the boundaries between the wall bodies 10 and 20 can be separated by lifting the hooks (hanging tools) 85 temporarily provided to the first wall body 10 and the second wall body 20, respectively. That is, at the boundary between the first wall body 10 and the second wall body 20, a recess that becomes an outer groove 39 is formed by the first auxiliary formwork 65, and is tapered by the second auxiliary formwork 66. An inner groove 38 is also formed. When the walls 10 and 20 are formed by the mold 60, the grooves 39 and 38 are formed on the outer and inner sides at the boundary between them, so that the walls 10 and 20 are respectively connected via the hanger 85. When lifted, stress is concentrated on the boundary between the wall bodies 10 and 20, the corner block 5 is divided or broken at the boundary, and the connecting body 30 appears. When the first wall body 10 and the second wall body 20 are lifted toward the center by a rope 86 or the like at the time of demolding, a bending force is applied to the first wall body 10 and the second wall body 20. By the action of the own weights of the first wall body 10 and the second wall body 20, stress is concentrated on the boundary between them, and the boundary between the first wall body 10 and the second wall body 20 is spontaneous. It can be easily broken by cracking or by applying a weak force.

After demolding, the first wall body 10 and the second wall body 20 can be bent at the boundary connected by the connecting body 30 instead of being in a straight line, so that the lower end surfaces 16 of the respective wall bodies 10 and 20 can be bent. It can be stored upright and safe.

FIG. 11 shows an example of different corner blocks 5. The base portion 40 of the first block 10 and the second block 20 of this example is provided with a short protruding bottom plate portion 41 under the inner side 7 of the main bodies 12 and 22, and 2 on the inner side 7. Includes a plurality of reinforcing bars 42 extending (protruding) in steps. The reinforcing bar 42 may have one step as in the above-mentioned example, or may have three or more steps according to the strength or the construction site.

FIG. 12 shows an example of a further different corner block 5. The base 40 of the first block 10 and the second block 20 of this example includes a bottom plate 41 prefabricated under the inner 7 of the main bodies 12 and 22. The bottom plate portion 41 is prefabricated into a shape that does not interfere even if the angle θ formed by the first wall body 11 and the second wall body 21 is variable, and one example is a triangle as shown in the figure or a shape close to it. The configuration of the base portion 40 is not limited to these, as long as it can support the first wall body 11 and the second wall body 21 with sufficient strength, even if there is an opening in the center of the bottom plate portion 41. Often, the bottom plate portion 41 and the wall bodies 11 and 21 may be connected via other configurations such as ribs.

As described above, in the corner block 5, a plurality of connecting reinforcing bars 30 (31 to 35) connecting the first wall body 10 and the second wall body 20 are formed on the outer surfaces 12 and the outer surfaces 12 of the wall bodies 10 and 20. 22 is buried at different depths d1 to d5 at the top and bottom. Therefore, even in the corner block 5 having the outer surfaces 12 and 22 having the gradient 9, the connecting reinforcing bars 31 to 35 are arranged in the vertical direction (vertical direction) with respect to the installation (foundation surface), and the wall body. 10 and 20 can be rotated around a vertically extending shaft 51. Therefore, even if the angle of the corner portion of the site where the retaining wall 1 is installed is 90 degrees or other angles, by using the corner block 5 of this example, the retaining wall 1 in which the outer surfaces 12 and 22 are inclined can be used. Therefore, it is possible to construct and provide a retaining wall 1 having a corner portion 2 that fits the angle of the corner at the construction site.

In the above description, the corner block 5 in which the inner surfaces 14 and 24 of the wall bodies 10 and 20 are vertical is described as an example, but the inner surfaces 14 and 24 have the same gradient as the outer surfaces 12 and 22 or a gradient at a different angle. You may have. Further, as described above, the configuration of the base portion 40 of the first wall body 10 and the second wall body 20 is not limited to the above. Further, the first wall body 10 and the second wall body 20 may include a configuration in which further different functions such as a guardrail foundation and a fence foundation are added to the upper end surface 15. Further, in the above description, the corner block 5 in which the first wall body 10 and the second wall body 20 have a symmetrical configuration is described as an example, but the burial depth of the plurality of connecting bodies 30 is the first. The depth of the wall body 10 with respect to the outer surface 12 and the depth of the second wall body 20 with respect to the outer surface 22 may be different. For example, even if the retaining wall is installed on a sloping ground and the inclination of the foundation is different with respect to the horizontal plane on the left and right of the corner, the inclination of the foundation can be adjusted at the angle of the corner. At the same time, it is possible to provide a corner block on which the corner portion 2 can be constructed.

1 Retaining wall, 5 Corner block, 10 1st wall, 20 2nd wall

Claims (14)

It is a concrete product for constructing corners.
The first and second concrete walls placed adjacent to each other on the left and right,
A plurality of buried parts in which the first wall body and the adjacent ends of the second wall body are connected and dispersed vertically so as to change the angle formed by the first wall body and the second wall body. A concrete product having a plurality of connecting bodies having different burial depths with respect to at least one outer surface of the first wall body and the second wall body. In claim 1,
A concrete product in which the plurality of connecting bodies are embedded so that the burial depths with respect to the outer surfaces of both the first wall body and the second wall body are different in the vertical direction. In claim 2,
The outer surfaces of both the first wall body and the second wall body are inclined inward toward the upper side.
A concrete product in which the plurality of connecting bodies are buried so that the buried depth of the lower connecting body is larger than the buried depth of the upper connecting body. In any of claims 1 to 3,
Concrete that is an outer groove formed by a part of the end faces of the first wall body and the second wall body adjacent to each other, and further has an outer groove having different depths with respect to the outer surface. Product. In any of claims 1 to 4,
An inner groove formed by a part of the end faces of the first wall body and the second wall body adjacent to each other, and having a substantially V-shaped cross section with the side of the plurality of connections as the apex. A concrete product that further has an inner groove. In any of claims 1 to 5,
The plurality of connections are concrete products, which are reinforcing bars. A method for constructing a retaining wall, comprising a step of constructing a corner portion by the first wall body and the second wall body of the concrete product according to any one of claims 1 to 6. A retaining wall having a corner portion including the first wall body and the second wall body of the concrete product according to any one of claims 1 to 6. A method for manufacturing a concrete product having a first wall body and a second wall body arranged adjacent to each other on the left and right sides of a corner portion.
The first wall body includes a bottom surface for integrally molding the first wall body and the outer surface of the second wall body so that the distance to the bottom surface differs in the vertical direction of the concrete product. And the step of presetting a plurality of connecting bodies for connecting the second wall bodies, and
A step of injecting concrete into the formwork and integrally molding the first wall body and the second wall body.
A manufacturing method comprising a step of separating the boundary between the first wall body and the second wall body when the concrete product is removed from the formwork. In claim 9, further
A manufacturing method comprising a step of arranging a first auxiliary mold having a different amount of protrusion from the bottom surface in the vertical direction along the boundary on the bottom surface of the mold. In claim 10, further
A second auxiliary form for forming a substantially V-shaped tapered surface inward along the boundary between the first wall body and the second wall body faces the first auxiliary formwork. A manufacturing method comprising a step of arranging the position to be used. In any of claims 9 to 11, further
The bottom surface of the formwork is installed so that the lower side of the concrete product is vertically lower than the upper side of the concrete product.
The manufacturing method includes a step of setting the distance of the plurality of connectors to the bottom surface so that the lower side is larger than the upper side. A formwork for manufacturing a concrete product having a first wall body and a second wall body arranged adjacent to each other on the left and right sides of a corner portion.
A bottom surface for integrally molding the first wall body and the outer surface of the second wall body, and
A first auxiliary formwork on the bottom surface, which is provided along the boundary between the first wall body and the second wall body and has a different amount of protrusion from the bottom surface in the vertical direction of the concrete product.
A mold having a second auxiliary mold for forming a substantially V-shaped tapered surface on the inside along the boundary. In claim 13,
A formwork in which the bottom surface is installed so that the lower side of the concrete product is vertically lower than the upper side of the concrete product.

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