JPS60258331A - Top block - Google Patents

Abstract

PURPOSE:To provide top blocks having their respective stay bases which may be vertically lined up, by a method wherein a stay formed in the shape of a pentagon in cross section is protruded from a portion located closer to the oblique side of the back of a block body having the front formed in the shape of a pentagon, and the rear parts of the two short sides of the stay are laterally expanded to form a stay base. CONSTITUTION:A stay 2, having a front formed in a shape in cross section about similar to the reduced shape of the front of a block body 1 formed in the shape of a pentagon, is protruded from a portion located closer to the oblique side of the back of a top block 1, and the rear ends of the two short sides 2' are respectively laterally expanded to form a stay base 3. When the top blocks A are aligned at the uppermost stage of a retaining wall, the stay base 3 of the top block A is vertically lined up with the stay base of an ordinary block at a lower stage adjacent to the uppermost stage to form a self-support structure, resulting in the popssibility to increase strength of a top part.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTIVES OF THE INVENTION a. Field of Industrial Use and Problems to be Solved by the Invention The present invention provides a method for constructing a concrete retaining wall using a large number of concrete stacked blocks. Regarding the top blocks to be installed in a row.

b. Prior art] When constructing a retaining wall by so-called bulk stacking of concrete blocks, so-called 4-piece stacking, in which four square parts of each concrete block are butted together, is considered to be defective stacking (Cited document: Civil Engineering Handbook published by Gihodo Nakamaki 1
607Jl column) However, there is no such thing as a so-called self-supporting and stable structure in which the butt ends of concrete blocks are stacked up and down, which avoids this fourth method.

Structure of the Invention A6 Means for Solving Problems The front face of the block body is made into a pentagon that is a combination of an oblong rectangle and an isosceles triangle, and a groove is provided on each of the upper surfaces of the oblique sides, and a groove is formed on the upper surface of the oblique side of the block body. According to the present invention, a retainer whose cross section is substantially similar to that of the front face of the block body is protruded from the front side of the block body, and furthermore, the rear portions of both short sides of the retainer are bulged in the left and right direction to form retainer butts. By arranging the crown concrete blocks in a row at the top of the retaining wall, and supporting the butt ends of the crown concrete blocks on the butt ends provided on the concrete stacked blocks stacked at the lower tier, a self-supporting and stable structure can be achieved. This is because we are constructing a retaining wall that avoids the second problem.

51 Effects and Examples The effects and examples of the present invention will be explained based on FIGS. 1 to 13.

Fig. 1 to Fig. 8 show an embodiment of the top concrete block A according to the present invention, and the front of the block body (1) is shown as follows.
A pentagon is formed by combining an oblong rectangle and an isosceles triangle, and a concave groove (15 (1) is provided on the upper surface of the oblique side of the pentagon, and a cross section of the block body (1) is similar to that of the block body (1). An almost similar shape with a reduced front shape (2)
, and furthermore, the rear part of both short sides (25 (2J) of the retainer (2) is bulged in the left and right direction to form the retainer end (3). An example of concrete block A' is shown in which the vertical side of the block body (1) is formed higher than that of the standard type top concrete block A shown in Fig. 1 etc., and the height of the retaining wall is adjusted higher. Figure 8 is also a front view showing another top concrete block A placed in a row at the top of the retaining wall. A desired number of concrete stacking blocks B each having a protruding triangular butt end (4) with a missing corner on the back are stacked in a desired number of stages, and the top concrete blocks A are arranged in a row on the top stage.
Figure 10 shows the back side of the same retaining wall, and shows that the protrusions provided on the side end faces of the concrete stacked blocks B and the concave grooves (15) of the top concrete block A are fitted into the grooves (15), and the butt ends (4) of the concrete stacked blocks B are fitted. ), a retaining wall is constructed by stacking the retaining ends (3) of the crown concrete blocks A vertically and masonry to form a self-supporting stable structure. Figures 11 and 12 show the state in which the retaining wall has been constructed. This is a sectional view showing that the concave groove (1a) of the top concrete block A engages with the protrusion of the concrete stacking block B, and the butt ends (3) and (4) are stacked vertically to form a self-supporting and stable structure. As shown in Figures 9 and 10, at the bottom of the retaining wall there is a concrete root block C with the shape of the block body (1) reversed by 180 degrees. The retaining ends (4) of the concrete blocks B are stacked vertically on the ends (5), and the side end surfaces of the block bodies are fitted into each other in a concave and convex manner. A side concrete block D in which the block body (1) is tilted is interposed between a root concrete block C and a concrete masonry block B, or between a concrete masonry block B and a top concrete block A, respectively. When the corner concrete blocks E are laid at the corners of the retaining wall, and when the root concrete blocks C and the side concrete blocks D are laid, or when the side concrete blocks D and the top concrete blocks A are laid. If a gap is created at the lower corner or upper corner of the retaining wall when piled up, corrective concrete blocks F and F' are laid to fill the gap.At this time, the butt ends of each concrete block are connected vertically. It becomes an independent and stable structure.

Effects of the invention It has a self-supporting and stable structure in which the butt end (4) of the concrete stacking block B and the butt end (3) of the top concrete block A are vertically connected, and the protrusions and recesses of the concrete stacking block B. Because the grooves (15) fit unevenly, a firm retaining wall can be built.Also, since the retaining end (3) is shaped to bulge out to the left and right from the retaining end (2), the retaining material can be retained. The block body (2) is strong and does not shift forward or backward when it is surrounded by it, and is filled continuously from top to bottom behind the retaining wall to solidly reinforce almost the entire rear surface of the retaining wall.Also, the block body (1) It is convenient to carry and install by grasping the retainer (2), which is thinner than the holder (2), and the work is safe because there is no risk of getting your hands or fingers pinched. Blocks A can be stacked upside down in a compact and orderly manner, and are safe and do not collapse during transportation or storage, and do not require additional storage space.

As described above, the present invention is a useful invention that has a robust structure, is easy to manufacture, has good workability, and is inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a rear view of the same, Fig. 3 is a right side view of the same, Fig. 4 is a plan view of the same, and Fig. 5 is an A-A in Fig. 4. 6 is a sectional view taken along line B-B in FIG. 3, FIG. 7 is a sectional view taken along line A-A, and FIG. 13 is a sectional view showing a stacked state of two crown concrete blocks according to the present invention. It is a diagram.

Claims (1)

[Claims] The front face of the block body is a pentagon that is a combination of an oblong rectangle and an isosceles triangle, and a protrusion with a cross section similar to the shape of the front face of the block body is provided on the hypotenuse edge of the back face of the block body. Furthermore, the top end block is formed by bulging out the rear portions of both short sides of the retainer in the left and right directions to form retainer ends.