JPH0352828Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention Industrial field of application The present invention relates to a so-called parallel retaining wall that protects slopes by assembling rod-shaped members into a cross-shaped structure and filling the inside with crushed stone. This is suitable for use when forming a curved surface.

Conventional technology The so-called parallel retaining wall is, for example,
Although it is known as an excellent retaining wall as described in the above publication, it is difficult to construct when the slope is curved, and there are also problems with its strength. FIG. 7 shows an example of the most commonly performed curved surface construction. This is a construction method in which a straight retaining wall is bent, creating a bent surface that approximates a curved surface. In FIG. 7, the retaining walls on the left and right sides of the bent part are assembled in a straight line with a front longitudinal block 11, a back longitudinal block 12, and a width block 13, respectively, and the bent parts are connected by a connecting block 14. .

Problems to be Solved by the Invention The retaining wall as described above has a problem in that the left and right retaining walls are not integrated with steel rods at the bent portion, and the strength of this portion is extremely weak. This is because the retaining wall has a normal slope (the angle formed by the slope and the vertical plane), so the distance between the left and right retaining walls at the bent portion changes from stage to stage, making it difficult to penetrate the steel rod. That is, when the slope is a convex curved surface, the interval becomes narrower at the upper stage, and when the slope is a concave curved surface, the interval becomes wider at the upper stage. Furthermore, since the retaining wall has a bent surface that approximates a curved surface, it was necessary to scrape off the slope or fill it with backfill crushed stone in areas that do not match the curved surface.

This invention solves these problems with conventional retaining walls. It can be constructed to perfectly conform to curved slopes, and all members are integrated with steel rods to create a strong retaining wall. can.

Means for Solving the Constituent Problems of the Invention The present invention consists of a rod-shaped width block with two holes penetrated at both ends, and a rod-shaped longitudinal block with one hole penetrated at both ends. In this retaining wall, the holes in the longitudinal block are formed into an oval shape in the longitudinal direction of the retaining wall, in which the holes in the longitudinal block are assembled into a shape, steel rods are passed through these holes and integrated, and crushed stone is filled in the cross-shaped internal space. It is a retaining wall.

Function When constructing a retaining wall of the present invention on a curved surface, as shown in FIG. 1, it becomes possible to make an angle θ between adjacent longitudinal blocks for each span along the curved surface. In this case, the spacing between the steel bars will be different for each tier (for convex curved surfaces, the spacing is narrower for the upper tier, and for concave curved surfaces, the spacing is wider for the upper tier), but since the holes in the longitudinal block are oval, the spacing between the steel bars is Even if the dimensions change, a longitudinal block of the same size can be used as long as it fits into the oblong hole. For example, if the length a of the oblong hole is 10 cm, theoretically the same block size can be used even if the distance between the steel bars changes by 2a = 20 cm. Therefore,
Taking into account some margin, the dimensions of the longitudinal block were set to 10.
By standardizing every cm, no matter how curved the slope is, it can be constructed using only standardized products.
In other words, it is only necessary to switch to a standard product of the next size in stages at which the change in the spacing between the steel bars exceeds the allowable value of the oblong hole. The holes in each block are filled with mortar after passing through the steel rod. In this way, the retaining wall of the present invention can be constructed to perfectly conform to a curved slope, and all members can be integrated with steel rods.

If haunch surfaces are formed at both ends of a longitudinal block, the width of which narrows toward the tip, even if adjacent longitudinal blocks have an angle of θ, the haunch surfaces face each other and overlap front and back, as shown in Fig. 5. The interval c between the holes in the width block can be a normal standard dimension (when the slope is flat). Furthermore, the gap d between the ends of the longitudinal blocks overlapping one another appears small, resulting in an excellent design.

When an angle .theta. is given to adjacent longitudinal blocks at a point having a normal slope .alpha., the longitudinal blocks form an angle .beta. with respect to the width blocks, as shown in FIG.
β=tan ⁻¹ (tanα·tanθ/2). Therefore, when α and θ are relatively large values, it is desirable that the width block has a hexagonal cross section according to the angle β, and that the longitudinal block and the width block are in surface contact.

Example Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 relate to a retaining wall A that is an embodiment of the present invention, FIG. 1 is a schematic plan view, FIG. 2 is a schematic sectional view taken along the line X-X in FIG. 1, and FIG. 3 is a surface longitudinal block. Figure 4 is a perspective view of the back longitudinal block;
FIG. 5 is a perspective view of the width block, and FIG. 6 is an explanatory sectional view showing the relationship between the width block and the longitudinal block.

The retaining wall A consists of a front longitudinal block 1, a back longitudinal block 2 and a width block 3, and has a radius R=20.
It is formed into a curved surface of m, and is assembled in 10 stages (H = 3 m) with a normal slope α = 15°. In FIG. 1, the solid line indicates the uppermost stage, and the broken line indicates the lowermost stage. The angle θ of adjacent longitudinal blocks is approximately 5°, and the interval l between the steel bars i of the front longitudinal blocks is l ₁ = 1700 mm at the bottom stage and l ₁₀ = 1585 mm at the top stage, decreasing by about 13 mm for each stage. Front longitudinal block 1 and back longitudinal block 2
are of the same size from the bottom to the top.

The surface longitudinal block 1 shown in Fig. 3 has a length of 2000 mm.
mm, width 200mm, height (not including fins) 150mm,
It has an oblong hole 4 and a haunch surface 6 at both ends, and has fins 5 on the upper and lower surfaces to prevent crushed stone s from flowing out (the uppermost stage has only the lower surface). The dimensions of hole 4 are length a = 100
mm, width b=35 mm. Haunch surfaces 6 are provided at four locations on the front and back sides of both ends.

The back longitudinal block 2 shown in Fig. 4 has a length of 1900 mm.
mm, width 200mm, height 150mm, with oblong holes 7 on both ends.
and a haunch surface 8. The dimensions of the holes 7 are equal to the holes 4 of the surface longitudinal block 1. The haunches 8 are provided only on the surfaces of both ends, since the block does not have fins and cannot be used with the front and back reversed.

Width block 3 shown in Figure 5 has a length of 1900 mm and a width of
200mm, height 150mm, two holes on each end 9
has. The interval c between the holes 9 at one end is 200 mm, and the diameter of the holes 9 is 35 mm. The cross-sectional shape is a hexagonal shape in which the centers of the upper and lower surfaces protrude in a chevron shape, and the angle β of the chevron shown in FIG. 6 is approximately 0.8°.

Effects of the invention Even if the slope is curved, the retaining wall of this invention can be formed with a free curvature along the slope using only standard materials. The work of filling with crushed stone can be kept to a minimum, and the design can produce beautiful curves. Additionally, since the entire retaining wall can be integrated with steel rods, it becomes an extremely strong retaining wall.

[Brief explanation of the drawing]

1 to 6 relate to a retaining wall A that is an embodiment of the present invention, FIG. 1 is a schematic plan view, FIG. 2 is a schematic sectional view taken along the line X-X in FIG. 1, and FIG. 3 is a surface longitudinal block. Figure 4 is a perspective view of the back longitudinal block;
FIG. 5 is a perspective view of the width block, and FIG. 6 is an explanatory sectional view showing the relationship between the width block and the longitudinal block. FIG. 7 is a schematic plan view of a conventional retaining wall. 1... Front longitudinal block, 2... Back longitudinal block, 3... Width block, 4... Hole, 5... Fin, 6... Haunch surface, 7... Hole, 8... Haunch surface, 9... Hole, 10... Foundation, 11... Front longitudinal block, 12... Back longitudinal block, 13...
Width block, 14... Connecting block, i... Steel bar, l... Spacing between steel bars, s... Crushed stone.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rod-shaped width block with two holes penetrated at both ends and a rod-shaped longitudinal block penetrated with one hole penetrated at both ends are assembled in a parallel cross-shape, A retaining wall formed by penetrating and integrating steel rods into these holes and filling crushed stone into a cross-shaped internal space, characterized in that the holes in the longitudinal block are oval in the longitudinal direction. (2) A retaining wall as described in Claim 1 of the Utility Model Registration Claim, characterized in that a corbel surface is formed at both ends of a longitudinal block, the width becoming narrower towards the tip. (3) The retaining wall described in claim 1 or 2 of the utility model registration claim, characterized in that the width block has a hexagonal cross-sectional shape with the center of the upper and lower surfaces protruding in a chevron shape. retaining wall.