JP2010126927A - Concrete block retaining wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete block retaining wall which can eliminate a horizontal wasted space between lowermost and uppermost front surfaces, and which can suppress the amount of placed cast-in-place concrete for integrating respective concrete blocks together. <P>SOLUTION: The retaining wall 1 includes the first concrete blocks 2a-2d, and the second concrete blocks 3a and 3b which are installed on the upper portion of the first concrete block 2d. The first concrete blocks 2a-2d each comprise a first front wall 21, the front surface of which has a vertical inclination, and a first rear wall 22 which has an inclination sloping backward. Anchor bars 31a-31d are attached to rear surfaces of the first rear walls 22 of the first concrete blocks 2a-2d, respectively. A vertically-continuous concrete body 8 is placed on the rear side of the first rear wall 22 in such a manner as to cover the anchor bars 31a-31d, and the first concrete blocks 2a-2d are integrated together. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a concrete block retaining wall, and in particular, when a road widening is formed in a mountainous area or the like, the road widening work is simultaneously and easily performed on the upper part of the concrete retaining wall whose vertical gradient of the front wall is substantially vertical. It is about the concrete block pile retaining wall that can be done economically.

  When performing road widening construction in mountainous areas, etc., a concrete block having a normal shape with a front wall generally having a predetermined slope, for example, a slope of about 5 minutes (length 1: ratio of width 0.5) Were stacked to form a retaining wall, and a road was constructed on top of it. However, since all the front walls have a predetermined slope, the horizontal distance between the lowermost front surface and the uppermost front surface is large, and the space cannot be used effectively. It was.

  Accordingly, various concrete block stacking walls have been proposed in which the horizontal distance between the lowermost front surface and the uppermost front surface is small. Among these, the concrete block stacking wall in which the front wall of the upper concrete block has a steep slope will be described below.

  FIG. 14 is a construction sectional view of the concrete block stacking wall disclosed in Patent Document 1, FIG. 15 is a perspective view showing a schematic structure of a part of the retaining wall shown in FIG. 14, and FIG. FIG. 15 is a perspective view showing a schematic structure of a part of a concrete block used in the retaining wall shown in FIG.

  With reference to these drawings, the retaining wall 70 is provided with first concrete blocks 71a to 71d having a normal shape installed in four steps on the upper part of the foundation concrete 6, and on the upper part of the first concrete block 71d. The two concrete blocks 72a to 72c are configured to be stacked in three stages.

  The first concrete blocks 71a to 71d have a shape such that the normal gradient of the front and rear surfaces is about 5 minutes, and the other shapes are basically the same as those of the second concrete blocks 72a to 72c described later. It has a shape. Then, as shown in FIG. 16, the second concrete blocks 72a to 72c are rectangular flat plate-shaped, and a front wall 77 whose front surface has a substantially vertical normal gradient, and a retaining wall 78 connected to the center of the front wall 77. And a flat plate-like rear wall 79 connected to the retaining wall 78 and connected substantially parallel to the front wall 77. In addition, in the space between the front wall and the rear wall of each of the first concrete blocks 71a to 71d and the second concrete blocks 72a to 72c, a reinforcing bar 76 extending in the vertical direction is disposed, and an on-site cast concrete 75 is provided. Has been laid. Accordingly, the first concrete blocks 71a to 71d and the second concrete blocks 72a to 72c are firmly connected to each other in the vertical and horizontal directions.

  And while the basic block 11 is installed in the upper part of the retaining wall 70, the sidewalk surface 14 and the road surface 15 are formed, and a road is widened.

Since the retaining wall 70 is configured in this way, the front walls 77 of the second concrete blocks 72a to 72c are aligned in the vertical direction. Accordingly, the slope of the slope surface of the front wall 77 is substantially vertical. Since the slope of the slope surface of the front wall 77 is substantially vertical, for example, when compared with a retaining wall in which only the first concrete blocks 71 having a normal shape are stacked, the front surface of the lowermost stage and the front surface of the uppermost stage are horizontal. The directional spacing will be reduced. That is, the road widening space is expanded.
JP 2008-144585 A

  In the conventional concrete block stacking wall as described above, the road widening space is expanded as compared with a retaining wall in which normal shape concrete blocks having a normal gradient of about 5 minutes in front are stacked. However, as shown in FIG. 14, a distance L is generated at a horizontal interval between the lowermost front surface and the uppermost front surface of the retaining wall 70. That is, it cannot be said that the space of this distance L is fully utilized for road widening.

  Here, in order to solve the above-described problem, for example, the slopes of the slope surfaces of the front walls of the first concrete blocks 71a to 71d shown in FIG. 14 are formed substantially vertically, and the first concrete blocks 71a to 71d and the second concrete blocks 71 The front walls of the concrete blocks 72a to 72c are aligned in the vertical direction. Then, the placement amount of the on-site cast concrete to be placed in each space of the first concrete blocks 71a to 71d and the second concrete blocks 72a to 72c is greatly increased.

  The present invention has been made to solve the above-described problems, and eliminates a useless space in the horizontal direction between the lowermost front surface and the uppermost front surface, and integrates each concrete block. An object of the present invention is to provide a concrete block stacking wall capable of suppressing the amount of cast concrete.

  In order to achieve the above-mentioned object, the invention according to claim 1 is a concrete block stacking wall formed by stacking a plurality of concrete blocks up and down, and is included in at least the concrete block, and the front wall is moved up and down. Each of the plurality of first concrete blocks installed in a state of being aligned with each other is opposed to the first front wall composed of a first inclined surface having a vertical gradient, and is inclined rearward while facing the first front wall. A first rear wall comprising a second sloped surface, the second sloped surface of each first rear wall of the first concrete block forming a continuous sloped surface, and further, a first slope of each of the first concrete blocks. It is formed on the rear side of the rear wall and includes an integration means for integrating the first rear walls vertically.

  If comprised in this way, the difference of the horizontal distance of the 1st front wall of the lowest stage in a 1st concrete block and the 1st front wall of the uppermost stage will be lost. Each of the first rear walls of the first concrete block is integrated vertically.

  The invention described in claim 2 is a concrete block stacking wall formed by stacking a plurality of concrete blocks vertically, and is installed at least in the concrete block, with the front wall aligned vertically. Each of the plurality of first concrete blocks includes a first front wall composed of a first gradient surface having a vertical gradient, and a first rear wall composed of a second gradient surface facing the first front wall and having a vertical gradient. Each of the first concrete blocks increases in horizontal direction between the first front wall and the first rear wall as it goes upward, and further on the rear side of the first rear wall of each of the first concrete blocks. And is provided with an integration means for integrating the first rear walls vertically.

  If comprised in this way, the difference of the horizontal distance of the 1st front wall of the lowest stage in a 1st concrete block and the 1st front wall of the uppermost stage will be lost. Each of the first rear walls of the first concrete block is integrated vertically.

  According to a third aspect of the present invention, in the configuration of the first or second aspect of the present invention, the integration means includes an anchor bar attached to the rear surface of the first rear wall of each of the first concrete blocks, and an anchor And a concrete body continuously formed up and down along each of the first rear walls so as to cover the streaks.

  If comprised in this way, the 1st rear wall of the upper and lower 1st concrete blocks will be integrated with a concrete body via an anchor reinforcement.

  According to a fourth aspect of the present invention, in the configuration of the first aspect of the present invention, the integration means is formed for each of the first concrete blocks, and is opposed to the rear of the first rear wall at the same distance. Concrete formed in a space between each of the first rear wall and each of the rear back walls in each of the first rear concrete block and the third rear wall having a third parallel slope having a slope parallel to the second slope. Including the body.

  If comprised in this way, the 1st rear wall of an up-and-down 1st concrete block will be integrated by the concrete body formed between each of the 1st back wall in a 1st concrete block, and each of a reserve back wall.

  According to a fifth aspect of the present invention, in the configuration of the first aspect of the present invention, each shape of the first concrete block is stable against earth pressure applied to the rear surface at the installation position. In addition, a second concrete block is installed on the first concrete block. The second concrete block includes a fourth slope surface having a vertical slope, and the first front wall of the first concrete block. And a second rear wall facing the second front wall, the second rear wall being positioned at a position above the first rear wall on the uppermost stage of the first concrete block. 2 Located on the front wall side.

  If comprised in this way, a 2nd concrete block will become compact with respect to the 1st concrete block of the uppermost stage at least.

  According to a sixth aspect of the present invention, in each of the first concrete blocks, the first front wall and the first rear wall are each a rectangular frame in plan view. The first side wall and the second side wall are connected to each other in the shape, and the first side wall is formed with a concave portion extending in the vertical direction. The second side wall is extended in the vertical direction and is adjacent to the first concrete in the same step. A convex part that can be engaged with the concave part of the block in the horizontal direction is formed, and the horizontal height of the convex part is lower than the horizontal depth of the concave part, and the first side wall and the second side wall between the adjacent first concrete blocks Concrete is filled and hardened between the two.

  If comprised in this way, the 1st concrete blocks adjacent to a horizontal direction will be integrated with concrete while engaging with a recessed part and a convex part.

  According to a seventh aspect of the invention, in the configuration of the sixth aspect of the invention, the convex portion of the second side wall has a concave portion formed at the center thereof.

  If comprised in this way, concrete will be filled also into a recessed part.

  The invention according to claim 8 is the configuration of the invention according to any one of claims 1 to 7, further comprising a third concrete block installed below the lowermost block of the first concrete block, The three concrete blocks have the same shape as the lowermost block, and the third rear wall is installed so as to align with the first rear wall of the lowermost block.

  If comprised in this way, the front wall of a 3rd concrete block will be located ahead of the 1st front wall of a 1st concrete block.

  As described above, according to the first aspect of the present invention, there is no difference in horizontal distance between the lowermost first front wall and the uppermost first front wall in the first concrete block. It becomes a retaining wall. Moreover, since each of the 1st rear wall of a 1st concrete block is integrated up and down, while being able to suppress the amount of concrete placement, the horizontal shift | offset | difference of the upper and lower 1st concrete blocks can be prevented.

  The invention according to claim 2 is an efficient concrete block stacking wall because there is no difference in horizontal distance between the lowermost first front wall and the uppermost first front wall of the first concrete block. Moreover, since each of the 1st rear wall of a 1st concrete block is integrated up and down, while being able to suppress the amount of concrete placement, the horizontal shift | offset | difference of the upper and lower 1st concrete blocks can be prevented.

  In the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the first rear walls of the upper and lower first concrete blocks are integrated by the concrete body via the anchor bars, so The reliability of the state is improved.

  In addition to the effect of the invention described in claim 1, the invention described in claim 4 is characterized by the fact that the concrete body formed between each of the first rear wall and each of the back wall in the first concrete block Since the first rear wall of the first concrete block is integrated, the reliability of the integrated state is improved.

  In addition to the effects of the invention according to any one of claims 1 to 4, the invention according to claim 5 is more compact than at least the first concrete block at the uppermost stage. There is no problem in strength, and it is a retaining wall that is advantageous in construction and economy.

  In addition to the effect of the invention according to any one of claims 1 to 5, the invention according to claim 6 is such that the first concrete blocks adjacent in the horizontal direction engage with each other between the recess and the protrusion. Since it is integrated with concrete, these horizontal displacements can be prevented and the amount of concrete used for filling can be reduced.

  According to the seventh aspect of the invention, in addition to the effect of the sixth aspect of the invention, since the concrete is also filled in the recessed portion, the horizontal and vertical deviations between the first concrete blocks adjacent in the horizontal direction can be reduced. The prevention effect is further improved.

  According to an eighth aspect of the invention, in addition to the effect of the invention according to any one of the first to seventh aspects, the front wall of the third concrete block is located in front of the first front wall of the first concrete block. Therefore, the bottom plate area of the retaining wall increases and the ground reaction force is reduced.

  FIG. 1 is a construction sectional view of a concrete block stacking wall according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing a schematic structure of a part of the retaining wall shown in FIG. 3 is a perspective view showing a schematic structure of a part of the concrete block used in the retaining wall shown in FIG. 1, and FIG. 4 is an enlarged cross-sectional view taken along line IV-IV shown in FIG.

  With reference to these drawings, the retaining wall 1 was installed in two stages on the first concrete blocks 2a to 2d installed on the foundation concrete 6 in four stages and on the uppermost first concrete block 2d. Second concrete blocks 3a and 3b are provided. And the foundation block 11 for installation of the handrail 13 is installed in the upper part of the 2nd concrete block 3b located in the uppermost stage, and while the handrail 13 is fixed to this, the sidewalk surface 14 and A road surface 15 is formed.

  First, the shape and the like of the first concrete blocks 2a to 2d will be described below.

  As shown in FIG. 3, the first concrete blocks 2 a to 2 d are formed in a rectangular flat plate shape with a first front wall 21 having a first inclined surface having a front surface having a vertical gradient, and a first front wall 21. The first rear wall 22 is formed of a second inclined surface that faces the rear and has a gradient of about 5 minutes that is inclined rearward. Further, the first front wall 21 and the first rear wall 22 are connected to each other in a rectangular frame shape in plan view, the first side wall 23a and the second side wall 23b having a flat plate shape, and the first rear wall 22 below the first rear wall 22. And a rectangular flat plate 24 extending in the direction toward the front wall 21. The bottom plate 24 is formed with a drain hole 33 penetrating in a vertical direction at a substantially central portion, and the drain hole 33 can drain downward.

  As one of the means for integrating the first concrete blocks 2a to 2d, anchor bars 31 and 32 are attached to the rear surfaces of the first rear walls 22 of the first concrete blocks 2a to 2d. Further, on the rear side of the first rear wall 22, a concrete body 8 that is continuous up and down along each of the first rear walls 22 so as to cover the respective anchor bars 31 and 32 is the other of the integration means. It is laid as. Accordingly, the first concrete bodies 2a to 2d are integrated vertically. The detail about the integration means of 1st concrete 2a-2d is mentioned later.

  Further, a concave portion 25 extending in the vertical direction is formed on the first side wall 23a, and a convex portion 26 extending in the vertical direction is formed on the second side wall 23b. Detailed shapes and effects of the concave portion 25 and the convex portion 26 will be described later.

  And as FIG. 1 etc. show, the 1st concrete blocks 2a-2d installed in four steps up and down are installed in the state which each 1st front wall 21 aligned vertically. Further, the first concrete blocks 2a to 2d installed in four stages are formed such that the second slope surface of each first rear wall 22 is a continuous slope surface.

  Next, the shape and the like of the second concrete blocks 3a and 3b will be described below.

  The second concrete blocks 3a and 3b have similar shapes to those of the first concrete block 2 shown in FIG. 3 excluding the anchor bars 31 and 32. And it installs so that the 2nd front wall 51 which consists of a 4th slope surface which the front surface has a perpendicular | vertical gradient in the shape of a rectangular flat plate may be on the 1st front wall 21 of the 1st concrete block 2d located in the downward direction. Has been.

  Further, the second rear wall 52 of each of the second concrete blocks 3a and 3b is a second front from the position above the first rear wall 22 of the first concrete block 2d located at the uppermost stage of the first concrete blocks 2a to 2d. It is formed so as to be located on the wall 51 side. That is, the second concrete blocks 3a and 3b are more compact than at least the uppermost first concrete block 2d. Therefore, from the viewpoint of manufacturing the second concrete blocks 3a and 3b and excavation related to their installation, the retaining wall 1 is advantageous in terms of construction and economy in a state where there is no problem in strength as described later.

  In addition, although the gradient of the 1st slope surface which the 1st rear wall 22 of 1st concrete blocks 2a-2d has is about 5 minutes, it is 6 minutes (1: 0.6 from 3 minutes (1: 0.3) gradient. ) If it is a gradient, the same applies.

  The slope of the sloped surface of the second rear wall 52 of the second concrete blocks 3a and 3b is about 5 minutes, but the same applies if the slope is from 5 minutes to a vertical slope.

  The first concrete blocks 2a to 2d and the second concrete blocks 3a and 3b are all precast products and are manufactured at a factory. Therefore, since each component part is manufactured integrally, the reliability on intensity | strength is high.

  Next, details and effects of the means for integrating the first concrete blocks 2a to 2d will be described below.

  First, the first concrete blocks 2a to 2d are installed in a state where the respective first front walls 21 are vertically aligned. Accordingly, the difference in horizontal distance between the lowermost front wall and the uppermost front wall in the first concrete blocks 2a to 2d is eliminated. Accordingly, the space for widening the road can be sufficiently utilized, and the efficient retaining wall 1 is obtained.

  As described above, anchor bars 31 and 32 are attached to the rear surface of the first rear wall 22 of each of the first concrete blocks 2a to 2d. And the concrete body 8 is laid continuously up and down along each of the 1st back wall 22 so that the anchor reinforcement | struts 31 and 32 may be covered. With the concrete body 8, the first rear walls 22 of the upper and lower first concrete blocks 2 a to 2 d are integrated via anchor bars 31 and 32. That is, the upper and lower first concrete blocks 2a to 2d are integrated, and the reliability of the integrated state is improved. Accordingly, it is possible to prevent horizontal displacement of the upper and lower first concrete blocks 2a to 2d. In addition, since it is not necessary to integrate the upper and lower first concrete blocks 2a to 2d by filling the interior space with concrete, it is possible to suppress the amount of concrete placement.

  Next, detailed shapes and the like of the concave portion 25 of the first side wall 23a and the convex portion 26 of the second side wall 23b will be described below.

  As described above, in the first concrete block 2, the concave portion 25 extending in the vertical direction is formed on the first side wall 23 a, and the convex portion 26 extending in the vertical direction is formed on the second side wall 23 b.

  Here, with reference to FIG. 4, in the adjacent first concrete blocks 2 b-1 and 2 b-2 on the same stage, the convex portion 26 of the first concrete block 2 b-1 located on the lower side in the figure is It is formed so that it can engage with the recessed part 25 of the 1st concrete block 2b-2 located in the upper side in horizontal direction. Further, the height of the convex portion 26 in the horizontal direction is formed lower than the depth of the concave portion 25 in the horizontal direction. Therefore, when the concave portion 25 and the convex portion 26 are engaged, a slight gap is generated between them. Then, the concrete 9 is filled in this gap and cured, so that the adjacent first concrete blocks 2b-1 and 2b-2 on the same stage are integrated. Therefore, these horizontal shifts can be prevented, and the amount of concrete used for integration required for the integration can be reduced by the amount of protrusion of the convex portion 26.

  Further, the convex portion 26 is formed with a concave portion 41 having a rectangular shape in plan view at the center thereof. Accordingly, the above-described concrete 9 is also filled in the recessed portion 41. Therefore, the effect of preventing the horizontal and vertical shifts between adjacent first concrete blocks 2b-1 and 2b-2 on the same stage is further improved.

  Next, the construction sequence of the retaining wall 1 will be described.

  First, after excavating a predetermined amount of the slope of the mountain forming the retaining wall 1, foundation concrete 6 serving as the foundation of the retaining wall 1 is placed on the ground surface formed horizontally. On top of that, the first concrete block 2a is installed, the concrete body 8 is placed, the concrete 9 shown in FIG. 4 is filled, and the inner space of the first concrete block 2a is filled with earth and sand 27. Then, a backside crushed stone 19 for drainage is installed along the concrete body 8 on the rear side of the concrete body 8. After installing the first concrete block 2a in this manner, the first concrete blocks 2b to 2d are similarly installed sequentially from the lower side, and the concrete body 8 is similarly placed. At this time, the first front walls 21 are installed so as to be aligned vertically.

  Next, the second concrete block 3a is installed above the first concrete block 2d in the uppermost stage so that the second front wall 51 is positioned on the first front wall 21 of the first concrete block 2d. Furthermore, drained backside crushed stone is installed along the second rear wall 52 on the rear side of the second rear wall 52 of the second concrete block 3 a. Thus, after installing the 2nd concrete block 3a, the 2nd concrete block 3b is installed similarly.

  Next, when the above-described sidewalk surface 14 and roadway surface 15 are formed on the upper part of the second concrete block 3b at the uppermost stage, the retaining wall 1 is completed.

  In addition, the integrated 1st concrete blocks 2a-2b are set by the conditions (prevention of a shift | offset | difference and a fall) stable with respect to the earth pressure added from the back side in these installation positions. That is, each of the first concrete blocks 2a to 2d, particularly the first concrete block 2a to which the greatest earth pressure is applied, slides sideways due to the earth pressure from the rear side, and the first concrete blocks 2a to 2d are moved forward. The first concrete blocks 2a to 2d are integrated to increase the weight so that they do not fall over. Specifically, the first concrete blocks 2a to 2d are stacked and integrated with the concrete body 8 until the weight becomes a weight that can prevent horizontal displacement and overturning.

  By setting the first concrete blocks 2a to 2d as described above, the stability condition of the retaining wall 1 is ensured. Therefore, the upper part of the concrete block 2d can be added as its own weight when the concrete blocks 2a to 2d are toppled. Therefore, the second concrete blocks 3a and 3b have a length (reserved length) from the second front wall 51 to the second rear wall 52 in order to obtain a frictional resistance sufficient to resist earth pressure for each depth. It would be good to secure it. That is, the weight of the second concrete blocks 3a and 3b can be reduced. Therefore, as described above, since the second concrete blocks 3a and 3b may be the minimum necessary size, there is no problem in strength and the retaining wall 1 is advantageous in terms of construction and economy.

  Further, as described above, the second slope surface of the first rear wall 22 of each of the first concrete blocks 2a to 2d forms a continuous slope surface that slopes backward. Accordingly, since the earth pressure received on the back surface is reduced as compared with that of the vertical surface, it is advantageous from the viewpoint of preventing the retaining wall 1 from falling over the toe of the basic concrete 6.

  FIG. 5 is a schematic side view for explaining the construction effect of the retaining wall shown in FIG.

  FIG. 5 (1) shows a state in which a conventional retaining wall 70 is formed. Since the shapes of the first concrete blocks 71a to 71d and the second concrete blocks 72a and 72b have been described above, they will not be repeated here. In this case, in order to secure only the road width W, it is necessary to excavate a portion 61 above the road construction position on the mountain slope 10.

On the other hand, if it is the retaining wall 1 by 1st Embodiment of this invention shown in FIG. 5 (2), the slope surface which has the perpendicular | vertical gradient of 1st concrete blocks 2a-2d and 2nd concrete blocks 3a, 3b Each of the front walls is arranged in a vertically aligned state. Accordingly, the width that can be used as the road at the top of the retaining wall 1 is expanded by W ₁ from the position corresponding to (1) in FIG. Therefore, the inclined surface 10 would need to be drilled by W ₁ disappears. That is, in order to secure the road width W, it is only necessary to excavate a portion 62 that is lower than the portion 61 described above and above the road construction position of the mountain slope 10. Therefore, the time and cost required for excavation can be reduced.

  FIG. 6 is a sectional view of a concrete block stacking wall according to a second embodiment of the present invention, and FIG. 7 shows a schematic structure of a part of the concrete block used in the retaining wall shown in FIG. FIG.

  Referring to these figures, the retaining wall 20 is installed in two stages on the first concrete blocks 2a to 2d installed on the foundation concrete 6 in four stages and on the uppermost first concrete block 2d. Second concrete blocks 3a and 3b are provided. And road facilities, such as the sidewalk surface 14 and the road surface 15, are formed in the upper part of the 2nd concrete block 3b located in the uppermost stage.

  As shown in FIG. 7, the first concrete blocks 2a to 2d have substantially the same shape as the first concrete blocks 2a to 2d according to the first embodiment, and only the shapes of the first rear wall 22 and the bottom plate 24 are present. Is different. In other words, the first rear wall 22 is opposed to the first front wall 21 and is formed of a second inclined surface having a vertical gradient, and no drainage hole is formed in the bottom plate 24. Therefore, unlike the first rear wall 22 of each of the first concrete blocks 2a to 2d according to the first embodiment, a continuous inclined surface is not formed on the back surfaces of the concrete blocks 2a to 2d. In this embodiment, each of the first concrete blocks 2a to 2d is formed such that the horizontal distance between the first front wall 21 and the first rear wall 22 increases as it goes upward. And the horizontal distance of each baseplate 24 of 1st concrete blocks 2a-2d is formed so that it may become longer than the increase in the horizontal distance of the 1st front wall 21 and the 1st rear wall 22 mentioned above. Accordingly, each of the first rear wall 22 and the bottom plate 24 of the first concrete blocks 2a to 2d is formed in a continuous step shape.

  Then, similarly to the first embodiment, on the rear side of the first rear wall 22, the first rear wall 22 is continuous vertically along the first rear wall 22 so as to cover the anchor muscles 31 and 32. The concrete body 8 is placed and the first concrete blocks 2a to 2d are integrated vertically.

  The second concrete blocks 3a and 3b have similar shapes to those of the first concrete block 2 shown in FIG. 7 excluding the anchor bars 31 and 32.

  The first concrete blocks 2a to 2d and the second concrete blocks 3a and 3b are formed as described above, and since various setting conditions on strength are the same as those in the first embodiment, the description thereof is as follows. Do not repeat. Accordingly, the retaining wall 20 has the same effect as that of the first embodiment.

  In addition, since the construction order of this retaining wall 20 is basically the same as that according to the first embodiment, the description here will not be repeated.

  FIG. 8 is a construction sectional view of a concrete block retaining wall according to a third embodiment of the present invention, and FIG. 9 is a perspective view showing a schematic structure of a part of the retaining wall shown in FIG. 10 is a perspective view showing a schematic structure of a part of a concrete block used in the retaining wall shown in FIG.

  With reference to these drawings, the retaining wall 30 is installed in two stages on the first concrete blocks 2a to 2d installed on the foundation concrete 6 in four stages and on the uppermost first concrete block 2d. Second concrete blocks 3a and 3b are provided. And road facilities, such as the sidewalk surface 14 and the road surface 15, are formed in the upper part of the 2nd concrete block 3b located in the uppermost stage.

  As shown in FIG. 10, the first concrete blocks 2 a to 2 d are formed in a rectangular flat plate shape with a first front wall 21 having a first inclined surface having a vertical gradient on the front surface, and a first front wall 21. The first rear wall 22 is formed of a second inclined surface that faces the rear and has a gradient of about 5 minutes that is inclined rearward. Further, the first front wall 21 and the back rear wall 29 to be described later are connected in a rectangular frame shape in plan view, and the first side wall 23a and the second side wall 23b having a flat shape and a lower side of the first rear wall 22 1 A rectangular flat plate 24 extending in a direction toward the front wall 21 is provided. The bottom plate 24 is formed with a drain hole 33 penetrating in a vertical direction at a substantially central portion, and the drain hole 33 can drain downward.

  Further, as one of the means for integrating the first concrete blocks 2a to 2d, a third gradient that faces the rear side of the first rear wall 22 and has a gradient parallel to the second gradient surface of the first rear wall 22 is provided. It has a back wall 29 that is made up of a surface. As described above, the first side wall 23a and the second side wall 23b are formed so as to connect the first front wall 21 and the first retaining wall 29 to a rectangular frame in plan view. Accordingly, a space 46 is formed between the first rear wall 22, a part of the first side wall 23 a, a part of the second side wall 23 b, and the first retaining wall 29.

  Each of the first concrete blocks 2a to 2d has the shape as described above, and the distance between the first rear wall 22 and the first retaining wall 29 of each of the first concrete blocks 2a to 2d is the same. Is done. And as FIG. 8 etc. show, the 1st concrete blocks 2a-2d installed in four steps up and down are installed in the state which each 1st front wall 21 aligned vertically. Further, the first concrete blocks 2a to 2d installed in four stages are formed such that the second slope surface of each first rear wall 22 is a continuous slope surface. Accordingly, a continuous inclined surface is also formed on the third inclined surface of each first retaining wall 29. That is, each space 46 communicates in an oblique direction. Then, by placing the concrete body 8 in the space 46 as the other of the means for integrating the first concrete blocks 2a to 2d, each of the upper and lower first concrete blocks 2a to 2d is integrated. Accordingly, the reliability of the integrated state is improved.

  The second concrete blocks 3a and 3b have the same shape as the second concrete blocks 3a and 3b according to the first embodiment.

  The first concrete blocks 2a to 2d and the second concrete blocks 3a and 3b are formed as described above, and since various setting conditions on strength are the same as those in the first embodiment, the description thereof is as follows. Do not repeat. Therefore, the retaining wall 30 has the same effect as that of the first embodiment.

  The construction order of the retaining wall 30 is basically the same as that according to the first embodiment except that the preparation of the material for placing the concrete body 8 is not necessary. The explanation in is not repeated.

  FIG. 11 is a construction sectional view of a concrete block retaining wall according to a fourth embodiment of the present invention.

  With reference to these drawings, the retaining wall 40 includes three first-stage concrete blocks 2a to 2c, and a second concrete block 3a installed in two stages on the uppermost first concrete block 2c. 3b, and a third concrete block 4 installed in one stage between the lowermost first concrete block 2a and the foundation concrete 6. And road facilities, such as the sidewalk surface 14 and the road surface 15, are formed in the upper part of the 2nd concrete block 3b located in the uppermost stage.

  The first concrete blocks 2a to 2c have the same shape as the first concrete blocks 2b to 2d according to the first embodiment. The second concrete blocks 3a and 3b have the same shape as the second concrete blocks 3a and 3b according to the first embodiment.

  The 3rd concrete block 4 has the same shape as the 1st concrete block 2a located in the lowest step of 1st concrete blocks 2a-2c. And the 3rd rear wall 55 of the 3rd concrete block 4 is arrange | positioned so that it may align with the 1st back wall 22 of the 1st concrete block 2a. Further, the first concrete blocks 2a to 2c and the third concrete block 4 are composed of anchor bars 31 and 32 (not shown) and the concrete body 8 similar to the first concrete blocks 2a to 2d of the first embodiment. It is integrated by the integration means.

Since the third concrete block 4 is configured as described above, the third front wall 54 of the third concrete block 4 is to be located forward by a distance X ₁ from the first front wall 21 of the first concrete block 2a become. Therefore, since the bottom plate area of the retaining wall 40 is increased as compared with that of the concrete block 2a at the lowest stage according to the first embodiment, the ground reaction force acting on the retaining wall 40 is reduced. In addition, it is desirable to construct the retaining wall 40 according to this embodiment when there is a margin of land in front of the retaining wall 40.

  The first concrete blocks 2a to 2c, the second concrete blocks 3a, 3b, and the third concrete block 4 are formed as described above, and various setting conditions in terms of strength are the same as in the first embodiment. However, since the lowermost step is the third concrete block 4 projecting forward, the retaining wall 40 is more economical.

  In addition, since the construction order of this retaining wall 40 is basically the same as that according to the first embodiment, the description here will not be repeated.

  FIG. 12 is a construction sectional view of a concrete block retaining wall according to the fifth embodiment of the present invention.

  With reference to these drawings, the retaining wall 50 includes first concrete blocks 2a to 2c installed in three stages, and a second concrete block 3a installed in two stages above the first concrete block 2c in the uppermost stage. 3b, and a third concrete block 4 installed in one stage between the lowermost first concrete block 2a and the foundation concrete 6. And road facilities, such as the sidewalk surface 14 and the road surface 15, are formed in the upper part of the 2nd concrete block 3b located in the uppermost stage.

  The first concrete blocks 2a to 2c have the same shape as the first concrete blocks 2b to 2d according to the second embodiment. The second concrete blocks 3a and 3b have the same shape as the second concrete blocks 3a and 3b according to the second embodiment.

  The 3rd concrete block 4 has the same shape as the 1st concrete block 2a located in the lowest step of 1st concrete blocks 2a-2c. And the 3rd back wall 55 of the 3rd concrete block 4 and each of the 1st back wall 22 of the 1st concrete blocks 2a-2c are formed in the step shape similarly to 2nd Embodiment. Further, the first concrete blocks 2a to 2c and the third concrete block 4 are composed of anchor bars 31 and 32 (not shown) and the concrete body 8 similar to the first concrete blocks 2a to 2d of the second embodiment. It is integrated by the integration means.

Since the third concrete block 4 is configured as described above, the third front wall 54 of the third concrete block 4 is to be located forward by a distance X ₂ from the first front wall 21 of the first concrete block 2a become. Accordingly, since the bottom plate area of the retaining wall 50 is increased as compared with that of the concrete block 2a at the lowest stage according to the second embodiment, the ground reaction force acting on the retaining wall 50 is reduced. In addition, it is desirable to construct the retaining wall 50 according to this embodiment when there is room in front of the retaining wall 50.

  The first concrete blocks 2a to 2c, the second concrete blocks 3a, 3b, and the third concrete block 4 are formed as described above, and various setting conditions on strength are the same as those in the second embodiment. However, since the lowermost stage is the third concrete block 4 protruding forward, the retaining wall 50 is more economical.

  In addition, since the construction order of this retaining wall 50 is basically the same as that according to the second embodiment, the description here will not be repeated.

  FIG. 13 is a construction sectional view of a concrete block retaining wall according to a sixth embodiment of the present invention.

  With reference to these drawings, the retaining wall 60 includes first concrete blocks 2a to 2c that are installed in three stages, and a second concrete block 3a that is installed in two stages above the first concrete block 2c that is the uppermost stage. 3b, and a third concrete block 4 installed in one stage between the lowermost first concrete block 2a and the foundation concrete 6. And road facilities, such as the sidewalk surface 14 and the road surface 15, are formed in the upper part of the 2nd concrete block 3b located in the uppermost stage.

  The first concrete blocks 2a to 2c have the same shape as the first concrete blocks 2a to 2c according to the third embodiment. The second concrete blocks 3a and 3b have the same shape as the second concrete blocks 3a and 3b according to the third embodiment.

  The 3rd concrete block 4 has the same shape as the 1st concrete block 2a located in the lowest step of 1st concrete blocks 2a-2c. And the 3rd rear wall 55 of the 3rd concrete block 4 is arrange | positioned so that it may align with the 1st back wall 22 of the 1st concrete block 2a. Furthermore, the 1st concrete blocks 2a-2c and the 3rd concrete block 4 are integrated by the integration means which consists of the space 46 and the concrete body 8 similar to the 1st concrete blocks 2a-2d of 3rd Embodiment. ing.

Since the third concrete block 4 is configured as described above, the third front wall 54 of the third concrete block 4 is to be located forward by a distance X ₃ from the first front wall 21 of the first concrete block 2a become. Therefore, since the bottom plate area of the retaining wall 60 is increased as compared with that of the concrete block 2a at the lowest stage according to the third embodiment, the ground reaction force acting on the retaining wall 60 is reduced. In addition, it is desirable to construct the retaining wall 60 according to this embodiment when there is a margin of land in front of the retaining wall 60.

  The first concrete blocks 2a to 2c, the second concrete blocks 3a, 3b, and the third concrete block 4 are formed as described above, and various setting conditions in terms of strength are the same as in the third embodiment. However, since the lowermost step is the third concrete block 4 projecting forward, the retaining wall 60 is more economical.

  In addition, since the construction order of this retaining wall 60 is basically the same as that according to the third embodiment, the description here will not be repeated.

  In the first, second, fourth and fifth embodiments described above, two anchor bars having a specific shape are attached to the rear surface of the first rear wall of each first concrete block for each block. However, the anchor muscle may have other shapes. Further, it is sufficient that the number of anchor bars is at least one.

  In the third and sixth embodiments, the first rear wall and the first retaining wall are connected by the first and second side walls. However, the first rear wall and the first retaining wall are connected to each other. Other devices may be used as long as they can be connected.

  Furthermore, in each of the above embodiments, the number of stacking steps of each concrete block constituting the retaining wall is specified, but the number of steps may be arbitrarily determined according to the setting of the retaining wall height or earth pressure, etc. Needless to say.

  Furthermore, in each of the above embodiments, the integration means for integrating the upper and lower first concrete blocks is specified, but formed on the rear side of the first rear wall of each of the upper and lower first concrete blocks, Other integration means may be used as long as each of the first rear walls is integrated vertically.

  Furthermore, in each of the above embodiments, a concrete body is included as an integration means. However, for example, reinforcing bars and PC steel bars are arranged inside the concrete body to promote integration of the upper and lower first concrete bodies. May be.

  Further, in each of the above-described embodiments, the second concrete block is installed on the upper part of the first concrete block, but the second concrete block may be omitted, and the sidewalk as a road facility directly on the upper part of the first concrete block. A surface or a road surface may be formed.

  Further, in each of the above embodiments, the bottom plate is formed in each concrete block, but the bottom plate may not be provided.

  Furthermore, in each above-mentioned embodiment, although the concave part of a specific shape is formed in the convex part of the 2nd side wall, if it is a concave part formed in the center part of a convex part, a planar view round shape, etc. Other shapes may be used. Or there may not be a dent part.

  Furthermore, in each of the above embodiments, the concave portion and the convex portion are formed in a specific shape, but the concave portion extends in the vertical direction, the convex portion extends in the vertical direction, and can be engaged in the horizontal direction of the concave portion, Other shapes may be used as long as the horizontal height of the convex portion is lower than the horizontal depth of the concave portion.

  Further, in each of the above-described embodiments, in the adjacent same-stage concrete block, the concave portion of one first side wall and the convex portion of the other second side wall are engaged, and the first side wall and the other side are engaged. Concrete is filled between and integrated with the second side wall, for example, a concave portion is formed on one first side wall and the other second side wall, and between the one concave portion and the other concave portion. For example, the first side wall and the second side wall may be formed in other shapes and integrated, such as by filling concrete into the wall.

It is construction sectional drawing of the concrete block pile retaining wall by 1st Embodiment of this invention. It is the perspective view which showed the one part schematic structure of the retaining wall shown in FIG. It is the perspective view which showed the schematic structure of a part of concrete block used for the retaining wall shown in FIG. It is an expanded sectional view of the IV-IV line shown in FIG. It is a schematic side view for demonstrating the construction effect of the retaining wall shown in FIG. It is construction sectional drawing of the concrete block pile retaining wall by 2nd Embodiment of this invention. It is the perspective view which showed the schematic structure of a part of concrete block used for the retaining wall shown in FIG. It is construction sectional drawing of the concrete block pile retaining wall by 3rd Embodiment of this invention. It is the perspective view which showed the one part schematic structure of the retaining wall shown in FIG. It is the perspective view which showed the schematic structure of a part of concrete block used for the retaining wall shown in FIG. It is construction sectional drawing of the concrete block pile retaining wall by 4th Embodiment of this invention. It is construction sectional drawing of the concrete block pile retaining wall by 5th Embodiment of this invention. It is construction sectional drawing of the concrete block pile retaining wall by 6th Embodiment of this invention. It is construction sectional drawing of the conventional concrete block pile retaining wall. It is the perspective view which showed the one part schematic structure of the retaining wall shown in FIG. It is the perspective view which showed the schematic structure of a part of concrete block used for the retaining wall shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 20, 30, 40, 50, 60 ... Retaining wall 2, 3, 4 ... Concrete block 8 ... Concrete body 9 ... Concrete 21, 51, 54 ... Front wall 22, 52, 55 ... Rear wall 23 ... Side wall 25 ... Concave portion 26... Convex portion 29.

Claims (8)

A concrete block stacking wall formed by stacking a plurality of concrete blocks up and down,
Each of the plurality of first concrete blocks included at least in the concrete block and installed with the front wall aligned vertically is a first front wall including a first slope surface having a vertical slope, A first rear wall that is opposed to the front wall and is made of a second inclined surface that is inclined rearward;
The second slope of the first rear wall of each of the first concrete blocks forms a continuous slope;
Furthermore, a concrete block stacking wall that is formed on the rear side of the first rear wall of each of the first concrete blocks and includes an integration unit that vertically integrates each of the first rear walls. A concrete block stacking wall formed by stacking a plurality of concrete blocks up and down,
Each of the plurality of first concrete blocks included at least in the concrete block and installed with the front wall aligned vertically is a first front wall including a first slope surface having a vertical slope, A first rear wall that faces the front wall and has a second slope surface having a vertical slope;
Each of the first concrete blocks increases a horizontal distance between the first front wall and the first rear wall as going upward.
Furthermore, a concrete block stacking wall that is formed on the rear side of the first rear wall of each of the first concrete blocks and includes an integration unit that vertically integrates each of the first rear walls. The integration means includes
Anchor bars attached to the rear surface of the first rear wall of each of the first concrete blocks;
The concrete block retaining wall according to claim 1, further comprising a concrete body continuously formed vertically along each of the first rear walls so as to cover the anchor bars. The integration means includes
A back wall formed of a third sloped surface formed with respect to each of the first concrete blocks, facing the back of the first rear wall at the same distance and having a slope parallel to the second sloped surface;
The concrete block stacking wall according to claim 1, wherein each of the first concrete blocks includes a concrete body formed in a space between each of the first rear wall and each of the back rear walls. Each shape of the first concrete block is set under conditions that are stable against earth pressure applied to the rear surface at the installation position,
Furthermore, a second concrete block is installed on the first concrete block,
The second concrete block is
A second front wall that is formed on the first front wall of the first concrete block, and a second rear wall that faces the second front wall. Prepared,
5. The concrete block according to claim 1, wherein the second rear wall is located closer to the second front wall than a position above the first rear wall at the uppermost stage of the first concrete block. Stacking wall. Each of the first concrete blocks is formed with a first side wall and a second side wall that connect the first front wall and the first rear wall in a rectangular frame shape in plan view,
A concave portion extending in the vertical direction is formed on the first side wall,
On the second side wall, a convex portion is formed that extends in the vertical direction and can be engaged in the horizontal direction with the concave portion of the adjacent first concrete block of the same step.
The horizontal height of the convex portion is lower than the horizontal depth of the concave portion,
The concrete block loading wall according to any one of claims 1 to 5, wherein concrete is filled and hardened between the first side wall and the second side wall in the adjacent first concrete blocks. The said convex part of a said 2nd side wall is a concrete block stacking wall of Claim 6 which has a recessed part formed in the center part. And a third concrete block installed under the lowermost block of the first concrete block,
The third concrete block has the same shape as the lowermost block, and a third rear wall thereof is installed so as to be aligned with the first rear wall of the lowermost block. A concrete block stacking retaining wall as described in any of the above.

Images