JP4576018B2 - Retaining wall - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a retaining wall formed by stacking retaining wall concrete blocks, and particularly to a retaining wall concrete block having a hollow wall.
[0002]
[Prior art]
Conventionally, as a retaining wall for a slope, a cast-in-place leaning retaining wall in which a formwork is placed in front of the slope in parallel in the front and back, and concrete is cast and hardened between the formwork to form a wall body is known. It was done. In addition, there was a known masonry retaining wall that was constructed by placing indented concrete between the interstitial stones and stacking them one by one along the slope. Further, as a retaining wall concrete block, a retaining wall as shown in FIG. 8 is known in which rectangular parallelepiped hollow blocks whose upper and lower surfaces are opened are stacked with the rear wall along the slope. Further, a retaining wall as shown in FIG. 9 in which hollow blocks having a parallelogram shape in side view are stacked is known.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned leaning-type retaining wall has a problem in that it takes time to assemble the formwork and place concrete. In the masonry retaining wall, there was a problem that it took time for construction. In addition, although these problems are eliminated in the retaining wall in which the retaining wall concrete block is stacked, in the retaining wall concrete block in which the rear wall of the rectangular parallelepiped hollow block is stacked along the slope, However, there is a problem that the support from the back soil side is necessary and it is unstable at the time of installation.There is a problem that the block is self-supporting at the time of installation. If added, it would be dangerous to fall over to the back side, and when the back soil was backfilled, it would tilt to the front side and cause poor construction.
[0004]
Therefore, the present inventor provides a concrete block for a retaining wall that is easy to construct, has no fear of overturning, is safe, and has excellent integrity of the entire retaining wall, as a result of intensive studies in view of the conventional drawbacks.
[0005]
[Means for Solving the Problems]
The retaining wall according to claim 1 of the present invention is a retaining wall formed by stacking a plurality of retaining wall concrete blocks on a slope, and the retaining wall concrete block is inclined at the same inclination angle as the slope. It has been made from the front wall and the rear wall parallel to the front wall and side walls connecting the front wall and the rear wall, projections and recesses at the lower end that can be engaged with one another on the side walls, protrusions Are formed at the upper end, and the recess is formed at the lower end. The upper end of the side wall is between the front wall and the convex portion, and the lower end of the side wall is the front wall and the concave portion. In between, the connecting rebar insertion port is drilled, and the U-shaped connecting rebar is inserted into the connecting rebar insertion port to connect the upper and lower blocks, along the rear wall at the slope angle of the slope It is characterized by preventing the upper block from falling backward when stacked.
In this way, when the retaining wall blocks are stacked, the retaining wall is prevented from being displaced by engaging the concave and convex portions, and the upper and lower blocks are connected by the connecting reinforcing bars. Prevents the block from falling.
[0006]
In the retaining wall according to claim 2 , the side portion of the rear wall is thin except for the upper and lower ends, and a notch groove extending in the vertical direction is formed in the thick portion of the upper and lower ends, Thus, the side end portion of the rear wall can be cut out.
By doing in this way, when the slope is convex in plan view, the retaining wall can be placed along the slope by cutting out the side edge of the rear wall.
[0007]
The retaining wall according to claim 3 of the present invention has a notch formed in the concave and convex portions, and when the retaining wall concrete blocks are stacked, the notch and the lower concrete of the upper concrete block facing each other. A through hole is formed by the notch of the block, and the through hole is filled with concrete.
By doing so, when the retaining walls are stacked and filled with the infilled concrete, the gaps between the sidewalls are filled, and water that has entered from the rear surface of the retaining walls is prevented from seeping out to the front surface through the sidewalls.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings. 1A is a front view and FIG. 1B is a cross-sectional view of a construction drawing showing an example of an embodiment of a concrete block for retaining walls according to the present invention.
[0009]
In FIG. 1, 1 is a concrete block for retaining walls, and 2 represents a front ground line. The upper and lower edges of the side wall 13 of the retaining wall concrete block 1 are arranged parallel to the front ground line 2, and the front wall 11 and the rear wall 12 arranged before and after the side wall 13 are substantially parallel to the slope. Arranged. The block is placed on the foundation concrete 3 laid under the front ground line 2, and the next block is stacked on the block to form a retaining wall. The backside of the retaining wall is filled with backside crushed stone 4 between the slope and the retaining wall to prevent the retaining wall from falling to the backside, and the drainage of water accumulated in the backside soil is well drained. Further, a drain hole 14 is provided through the front wall 11 and the rear wall 12 of the retaining wall concrete block, so that rainwater or the like flowing into the backside crushed stone 4 flows out to the front surface of the retaining wall. .
[0010]
2A and 2B are front views, FIG. 2B is a plan view, and FIG. 2C is a side view showing an example of an embodiment of the retaining wall block of the present invention. FIG. 3 shows another example of the embodiment of the retaining wall block according to the present invention. (A) is a front view, (B) is a plan view, and (C) is a side view.
[0011]
As shown in FIGS. 2 and 3, the front wall 11 and the rear wall 12 of the retaining wall block 1 are connected via a side wall 13. A convex portion 132 is formed at the upper end of the side wall 13, and a concave portion 131 is formed at the lower end. When the retaining wall blocks 1 are stacked as shown in FIG. 1, the convex portion 132 and the concave portion 131 of the side wall 13 are engaged with each other. In addition, a connecting reinforcing bar insertion port 133 is formed in the upper and lower end portions of the side wall 13 from the front wall 11, and the U-shaped connecting reinforcing bar 5 is inserted so that the upper and lower blocks do not shift as shown in FIG. It is made so that. The connecting rebar insertion opening may be drilled horizontally, but it is more preferable that the connecting rebar 5 is less likely to come off if it is drilled obliquely toward the lower end in the side wall 13 as shown in FIG. Moreover, the approximate center of the convex part 132 at the upper end of the side wall 13 and the concave part 131 at the lower end is cut out in a trapezoidal shape. When the retaining wall blocks 1 are stacked, as shown in FIG. 5, the trapezoidal notches form hexagonal through holes 134 in the side wall 13, and the retaining wall block 1 is filled with concrete. Sometimes, the through hole 134 is filled with concrete and the gap between the side walls 13 is filled, so that even if a gap is formed between the upper and lower side walls due to the manufacturing accuracy of the product and the accuracy of the construction, it has entered from the back of the retaining wall. Water hardly oozes out to the front through the side wall. A large-diameter through hole 135 is formed in the center of the side wall, and the concrete filled in the retaining wall block 1 is connected without being separated by the side wall.
[0012]
FIG. 6 is a perspective view showing an example of a side end portion of the rear wall of the retaining wall concrete block. In this example, the side walls of the rear wall are thinned leaving the upper and lower ends, and a notch groove 122 is provided in the thick part 121 of the upper and lower ends. When the slope is convex in plan view, the retaining wall block 1 can be made to follow the slope by cutting out a part of the rear wall as shown in FIG. is there. The reason why the upper and lower end portions of the side wall 13 are kept thick is that the side end portions are less likely to break when the retaining wall is formed in a straight line.
[0013]
【The invention's effect】
As described above, the retaining wall block according to claim 1 of the present invention is a retaining wall formed by stacking a plurality of retaining wall concrete blocks on a slope, and the retaining wall concrete block is a slope. And a side wall connecting the front wall and the rear wall, and the upper and lower ends of the side wall have convex portions that can be engaged with each other. A concave portion is formed at the upper end portion and the concave portion is formed at the lower end portion, and the upper end portion of the side wall is between the front wall and the convex portion, and the lower end portion of the side wall is Between the front wall and the recess, a connecting rebar insertion opening is formed, and a U-shaped connecting rebar is inserted into the connecting rebar insertion opening to connect the upper and lower blocks to the slope of the slope. Prevent the upper block from falling backwards when stacking along the rear wall. Therefore, when the retaining wall blocks are stacked, the positioning of the retaining wall is easy due to the engagement of the concave and convex parts, and the concrete block for the retaining wall is prevented from shifting forward and backward. By connecting the blocks, the retaining wall block is prevented from falling.
[0014]
The retaining wall block according to claim 2 of the present invention is such that the side walls of the rear wall are thin except for the upper and lower ends, and the notch grooves are formed in the upper and lower ends, and the slope is viewed in plan view. When convex, the side wall of the rear wall is notched by hitting it with a hammer, etc., so that the retaining wall can be placed along the slope, and equipment such as a concrete crusher is not required and construction is easy. .
[0015]
The retaining wall block according to claim 3 of the present invention is a part in which a part of the upper and lower edges of the side wall is cut away, and when the retaining wall is stacked and filled with infilled concrete, a gap between the side walls is formed. Fill and prevent water that has entered from the back of the retaining wall from seeping through the side wall to the front.
[Brief description of the drawings]
1A is a front view and FIG. 1B is a cross-sectional view of a construction drawing showing an example of an embodiment of a concrete block for retaining walls according to the present invention.
2A is a front view, FIG. 2B is a plan view, and FIG. 2C is a side view showing an example of an embodiment of a retaining wall block of the present invention.
3A is a front view showing an example of an embodiment of a retaining wall block of the present invention, FIG. 3B is a plan view, and FIG. 3C is a side view.
FIG. 4 is a cross-sectional view showing an example of an embodiment of a retaining wall block of the present invention.
FIG. 5 is a cross-sectional view showing an example of an embodiment of a retaining wall block of the present invention.
FIG. 6 is a perspective view showing an example of a side end portion of a rear wall of a concrete block for retaining wall according to the present invention.
FIG. 7 is a cross-sectional view showing an example of an embodiment of a retaining wall block of the present invention.
FIG. 8 is a cross-sectional view showing an example of a conventional retaining wall block.
FIG. 9 is a cross-sectional view showing an example of a conventional retaining wall block.
FIG. 10 is a plan view showing an example of an embodiment of the retaining wall block of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retaining wall block 11 Front wall 12 Rear wall 121 Thick part 122 Notch groove 13 Side wall 131 Recess 132 Protruding part 133 Reinforcing bar insertion port 134 Through hole 135 Large diameter through hole 14 Drain hole 2 Front ground line 3 Basic concrete 4 Back crushed stone 5 Connected rebar

Claims (3)

A retaining wall formed by stacking a plurality of retaining wall concrete blocks on a slope, wherein the retaining wall concrete block is parallel to the front wall and the front wall inclined at the same slope angle. Consists of a rear wall and a side wall connecting the front wall and the rear wall. The upper and lower ends of the side wall have a convex part and a concave part that can be engaged with each other, the convex part is at the upper end part, and the concave part is at the lower end part. In addition, a connecting rebar insertion opening is formed between the front wall and the convex portion at the upper end portion of the side wall and between the front wall and the concave portion at the lower end portion of the side wall. The U-shaped connecting rebar is inserted into the connecting rebar insertion slot to connect the upper and lower blocks, and the upper block moves backward when stacking along the rear wall at the slope of the slope Retaining wall characterized by preventing falling.   The side portion of the rear wall is made thin except for the upper and lower end portions, and a notch groove extending in the vertical direction is formed in the thick portion of the upper and lower end portions, thereby cutting out the side end portion of the rear wall. The retaining wall according to claim 1, wherein the retaining wall can be made.   When notches are formed in the concave and convex portions, and when the retaining wall concrete blocks are stacked, a through hole is formed by the notches of the upper concrete block and the lower concrete block facing each other. The retaining wall according to claim 1 or 2, wherein the through hole is filled with concrete.

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