JP2983199B2 - Retaining wall block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall block for constructing a retaining wall for preventing the collapse of the ground such as cut soil and embankment, and in particular, is capable of planting. The present invention relates to a retaining wall block which can be well designed and adapted to the surrounding environment.

[0002]

2. Description of the Related Art Blocks as shown in FIGS. 9 and 10 have been proposed as retaining wall blocks. That is, the block has an arch wall a in which an intermediate portion protrudes toward the ground in a circular cross section, and the arch wall a
The tie portion b is integrally formed between the left and right end portions of the tie. While receiving earth and sand load by arch effect of arch wall a,
Since the tie portion b receives a tensile load acting on the arch wall a, the tie portion b has a large bending strength capable of withstanding an extremely large earth and sand load. Further, the space surrounded by the arch wall a and the tie portion b is filled with the soil and used as a planting space, and adaptation to a natural environment is also good.

[0003]

One of the problems to be solved by the present invention is the problem of manufacturing cost. FIG.
In order to integrally form a block as shown in FIG. 10 by pouring concrete into a mold, it is necessary to combine concrete with a complicatedly formed mold and vertically beat concrete, and the manufacturing process is extremely complicated. The work was cumbersome and the manufacturing costs were not cheap. Also, unless the block is selected and used according to the construction site, it is not possible to perform construction that is perfect for the site, so it is mainly made to order, and it is not possible to produce and stock a large amount of the same type and select it as appropriate And that was also one of the reasons for the high manufacturing cost.

The next problem to be solved is the problem of the design of the block itself. It is extremely difficult to change the design of the block according to the situation and environment of the site, and usually only manufactures blocks with flat surfaces, and the design taste is poor,
It was not enough in harmony with the surrounding environment.

Another problem to be solved by the present invention is the size of the planting space provided between the arch wall a and the tie portion b. In the blocks shown in FIGS. 9 and 10, the tie portion b is integrally formed so as not to protrude from the arch wall a and to connect the left and right end portions flat. With such a configuration,
The space between the arch wall a and the tie part b was small, and the planting space was small. Therefore, large trees could not be planted in this space.

In the blocks shown in FIGS. 9 and 10, a connecting hole c for passing a steel rod through the upper and lower blocks for stacking the blocks up and down is formed, and a rib d for penetrating the connecting hole c is formed by an arch. It protrudes inside the wall a. In such a configuration, since the position of the connection hole c is located inside the arcuate arch wall a, the effective girder height d1 of the block is equal to or less than the height of the arcuate wall a having an arcuate cross section. This means that the bending strength of the block has been purposely reduced. In addition, the planting space is reduced because the rib e protrudes toward the tie portion b, and planting of a large tree or the like may not be possible.

[0007]

SUMMARY OF THE INVENTION The present invention facilitates the manufacture of a retaining wall block by enabling a separate tie portion to be attached to an arch portion of the retaining wall block. The design effect of the block is improved by making it possible to adopt the tie part selectively, and the problem of bending strength and planting space is solved by projecting the rib penetrating the connecting hole to the ground side of the arch part. It is.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A retaining wall block according to the present invention has an arch portion and a tie portion which are separately provided so that both can be attached. The retaining wall block has an arch portion in which an intermediate portion protrudes toward the ground in an arc-shaped cross section, and a separate tie portion is attached between the front surfaces of the left and right ends of the arch portion. The tie part is wrapped in a chord shape over an arcuate arch wall. The tie portion is fixed by screwing bolts passed through both ends into left and right ends of the arch portion. In this way, since the tie portion is separate, the arch portion of the retaining wall block can be manufactured by casting concrete by flat hitting, and can be manufactured extremely easily. In addition, since the tie portion is attached so as to protrude from the front of the arch portion, the space surrounded by the inside of the arcuate arch portion and the tie portion is widened, and planting of a large tree or the like becomes possible. The position (height) of the tie portion with respect to the arch portion can also be appropriately selected, and the block can be formed according to the construction situation at the site.

The surface of the tie portion is formed in various forms such as a tile surface or a stone wall surface. By selectively using these, taking into account the adaptation to the surrounding environment,
The design effect can be improved. In addition, by depressing the intermediate portion of the surface facing the arch portion of the tie portion, it is possible to further increase the planting space surrounded by both.

[0010] A rib is protrudingly provided at the left and right intermediate portion on the ground side of the arch portion, and a connecting hole penetrating from the upper end surface to the lower end surface of both ends of the arch wall and the rib. Since the ribs protrude outside the arcuate arch, that is, on the ground side, the planting space between the arcuate arch and the tie increases. In addition, since the middle rib on the left and right is provided on the ground side of the arch portion, the connection hole penetrating the rib is located on the outer peripheral side of the arc. As a result, the effective girder height of the block that functions for the earth and sand load is equal to or greater than the height of the arch portion, and a large bending strength is obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings. In the drawing, reference numeral 1 denotes a retaining wall block according to the present invention, which is an arch portion 2 bent in an arc shape in cross section.
And the Thai part 3. The arch portion 2 is provided with a vertically extending rib 4 protrudingly provided at an intermediate portion on the left and right sides of the surface on the ground side. From the upper end surface to the lower end surface of the rib 4 and the arch portion 2
Connection holes 6 are formed from the upper end surface to the lower end surface of the pillars 5 at both left and right end portions of the base member 5. A groove-shaped anchor hole 7 is recessed outside each of the pillars 5. The tie part 3 is a plate-shaped member, and is fixed to the pillar parts 5.5 by a plurality of bolts 8 penetrating the left and right ends. In the embodiment, the lower end of the tie portion 3 is mounted so as to be aligned with the lower end of the arch portion 2. However, the tie portion 3 can be arbitrarily selected, such as mounting the tie portion 3 at the upper and lower middle portion of the arch portion 2. The surface of the tie portion 3 is formed into a tile surface or a stone wall surface. The surface of the tie part 3 facing the arch part 2 has a thickness h at the left and right middle part.
Depressed. Recesses 8.8 corresponding to the anchor holes 7.7 of the arch portion 2 are formed at both left and right ends.

Referring to the case where the construction is performed using the retaining wall block 1 as described above, referring to FIG. 5, the arch portion 2 of the retaining wall block 1 is placed on the ground, buried in the ground in advance and fixed. The ground anchor 9 is passed through the anchor hole 7 and fixed to the anchor head 10. This arch part 2
The tie part 3 is fixed to the front surface with bolts 13. The holes through which the bolts 13 pass are filled with cement paste to improve the appearance. The anchor head 10 is accommodated in the concave portion 8 of the tie portion 3, and by attaching the tie portion 3 later, the anchor is covered by the tie portion, and the appearance of the entire retaining wall is improved.

On this retaining wall block 1, a retaining wall block 11 having only the arch portion 2 without the tie portion 3 is mounted. The connecting hole 6 also penetrates the retaining wall block 11 at the left and right intermediate portions and both end portions. The retaining wall block 11 is further placed on top of it, and the top block is also the ground anchor 9.
To the ground. The grout material of the cement paste is injected into the continuous connecting holes 6 of the retaining wall blocks 1 and 11 thus stacked from above through the steel rods 12 respectively, and the upper end of the steel rods 12 is fixed by nuts.
In this way, the vertically stacked blocks 1 and 11 are integrated by the steel bar 12, and the upper and lower blocks 1 are
Block 1 in the middle because it is fixed to the ground by
1 is also fixed by the upper and lower anchors 9,9. In this way, by integrating the upper and lower blocks 1 and 11 through the steel bar 12, all the blocks 1
It is not necessary to connect 11 to anchor 9 separately,
Construction costs can be reduced by reducing the number of anchors 9.
Backfill gravel is packed between blocks 1.11 and the ground.
The effective girder height d2 of the block 1 is equal to or greater than the height of the arch portion 2 as shown in FIG. 2, and a large bending strength can be obtained.

The land 15 is packed between the arch part 2 and the tie part 3 of the lowermost retaining wall block 1 and trees are planted. The trees can extend their roots to the ground under the soil 15, and do not hinder the growth of large trees. The middle part of the surface of the tie part 3 facing the arch part 2 is depressed, so that the planting space is large and planting a large tree is easy. As another embodiment, a retaining wall block 1 having a bottom portion 14 between the tie portion 3 and the arch portion 2 can be used. In particular, when it is not used at the lowermost stage, the retaining wall block 1 as shown in FIG. 6 can be used. At the lower end of the tie portion 3, a bottom portion 14 protruding toward the arch portion 2 side is provided. A pocket-like space formed by the arch portion 2, the tie portion, and the bottom portion 14 is filled with soil and planted. May be applied. Further, as shown in FIG. 7, the number of the tie portions 3 does not necessarily have to be one, and the required number of tie portions 3 can be appropriately selected and used according to the situation. .

[0015]

The present invention has the above-described configuration, and can obtain the following effects. By protruding the rib penetrating the connection hole on the ground side surface of the arch portion, the effective girder height of the block can be extended to the outside of the arch portion, and a large bending strength can be obtained. Since the arch part and the tie part are separated, the shape of the formwork is simple, the concrete can be manufactured by flat staking, the manufacturing operation is remarkably easy, and the construction cost can be reduced. Before waiting for an order, the arch part and the tie part are separately manufactured and stocked, and shipment and construction can be performed in combination as appropriate according to the construction conditions and demand, and it can be provided at low cost and can be shipped quickly. Become. By applying a stone wall pattern etc. to the surface of the tie part and selecting and using it, various design effects can be given according to the surrounding environment of the site, and the landscape of the entire retaining wall can be improved It is possible.
Since the tie portion protrudes and is attached to the front of the arch portion, the space surrounded by the arch portion and the tie portion is widened, and a tree or the like can be planted as a large planting space. The space can be further enlarged by depressing the left and right intermediate portions of the surface facing the arch portion of the tie portion. By attaching the tie section to the front of the arch section, the anchor can be covered to form a retaining wall with a good appearance. By protruding the rib on the ground side of the arch portion, the space between the arch portion and the tie portion is not reduced, and the planting of trees and the growth of trees are not hindered. The upper and lower ends of the left and right ends of the rib and the arch part pass through the connection holes, respectively, so that steel bars can be continuously passed through the connection holes of the vertically stacked blocks to integrate the upper and lower blocks. . Therefore, it is not necessary to connect all the blocks to the anchor, and the number of anchors can be reduced and the construction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a retaining wall block.

FIG. 2 is a plan view of a retaining wall block.

FIG. 3 is a longitudinal sectional view of a retaining wall block.

FIG. 4 is a partial cross-sectional view of a retaining wall block.

FIG. 5 is a perspective view of a construction state.

FIG. 6 is a longitudinal sectional view of a retaining wall.

FIG. 7 is a longitudinal sectional view of another embodiment of the retaining wall block.

FIG. 8 is a front view of another embodiment of the retaining wall block.

FIG. 9 is a perspective view of a conventional retaining wall block.

FIG. 10 is a plan view of a conventional retaining wall block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retaining wall block 2 Arch part 3 Tie part 4 Rib 5 Column part 6 Connection hole 7 Anchor hole 8 Depression 9 Ground anchor 10 Anchor head 11 Retaining wall block 12 Steel rod 13 Bolt 14 Bottom part 15

──────────────────────────────────────────────────続 き Continued on the front page (58) Investigated field (Int.Cl. ⁶ , DB name) E02D 29/02 304 E02D 29/02 311 E02D 17/20 103

Claims (2)

(57) [Claims] 1. A tie part which is separated from a front part of a left and right end portion of an arch wall whose intermediate portion protrudes toward the ground in a cross-section in an arc shape, is bridged in a chord shape to the arc-shaped arch part. The upper and lower ends of the arch part are projected to the front of both ends of the arch part, and at the middle part on the ground side of the arch part, a vertically continuous rib is protruded so as to protrude toward the ground side, and the left and right ends of the arch part A retaining wall block in which a connecting hole is formed from the upper end face to the lower end face of the portion and the rib, respectively. 2. The retaining wall block according to claim 1, wherein the tie portion has a recess at an intermediate portion of a surface facing the arch portion.