JPH0533567Y2 - - Google Patents

Description

[Detailed description of the invention] <<Purpose of the invention>><<Industrial application field>> The present invention relates to the structure of the corner portion of an L-shaped retaining wall constructed by connecting a large number of L-shaped retaining wall blocks.

<<Prior Art>> Conventionally, a corner block 70 as shown in FIG. 12 has been used for the corner portion of an L-shaped retaining wall. The width _L2 of the bottom plate of the corner block 70 is equal to or slightly larger than the width _L1 of the bottom plate 71a of the L-shaped retaining wall block 71. This is due to the basic idea that the earth pressure applied to the corner block is borne by itself and resisted.

《Problems that the invention attempts to solve》 Such conventional large corner blocks are
This method was extremely inconvenient in all aspects of manufacturing, storage, transportation, and implementation, resulting in problems such as poor work efficiency and high costs.

Such a corner block 70 is created by making a formwork,
For convenience of the product manufacturing process, the product is manufactured upside down as shown in FIG. It is obvious that the large size of the blocks increases the cost of the formwork.
Furthermore, when concrete is poured and removed from the mold after hardening, the state shown in Fig. 13 is obtained, and it is a difficult task to turn it upside down. Furthermore, it is obvious that it is inefficient in terms of transportation and storage due to its shape. Since it is large, it is naturally heavy and difficult to carry out.

《Structure of the invention》 《Means for solving the problems》 The present invention solves the above problems and is an L-shaped retaining wall using corner blocks that is excellent in all aspects of manufacturing, storage, movement, and construction. This relates to the structure of the corner part of a columnar corner block, which has two connecting surfaces that are in an angular relationship equal to the predetermined bending angle of the retaining wall. This is the structure of the corner part of an L-shaped retaining wall, which is characterized by connecting retaining wall blocks.

<Operation> The present invention makes it possible to arrange the L-shaped retaining wall blocks closer together by cutting out the mutually overlapping parts of the bottom plates of the L-shaped retaining wall blocks on both sides connected to the corner block. It is based on a completely new idea in which the earth pressure applied to the corner block is completely borne by the L-shaped retaining wall blocks on both sides.

In the present invention, the corner block is extremely miniaturized, which improves efficiency in all aspects of manufacturing, transportation, storage, and installation, leading to cost reductions.

《Example 1》 Figure 1 is a schematic plan view showing the structure of the corner part of Example 1, Figure 2 is a sectional view taken along line A-A in Figure 1, Figure 3 is an assembled perspective view, and Figure 4. 1 is a perspective view of an example of bolts used for assembly.

The L-shaped retaining wall block is an L-shaped block consisting of a bottom plate and a wall, and an L-shaped retaining wall is constructed by arranging a large number of these blocks in series. The corner part is bent at a certain angle.

As shown in Figures 1 and 3, corner block 1
is columnar with a substantially square cross section, and has two finding surfaces 2, 3 and two connecting surfaces 4, 5. The angle formed by the facing surfaces 2 and 3 is 90 degrees, which is equal to the bending angle α of the retaining wall. The connection surface 4 is at 90 degrees with respect to the facing surface 2, and the connection surface 5 is at 90 degrees with respect to the finding surface 3, and the angle formed by the connecting surfaces 4 and 5 is 90 degrees, which is equal to the bending angle of the retaining wall. ing.

The L-shaped retaining wall block 8 is connected to the connecting surface 4, and the L-shaped retaining wall block 9 is connected to the connecting surface 5 by bolts 6, respectively. The mutually overlapping portions of the bottom plates 7a, 8a of the L-shaped retaining walls 7, 8 form cutouts 7b, 8b. For bolt connection, a through hole 9 is provided in the corner block 1, and embedded nuts 10 are embedded in the L-shaped retaining wall blocks 7 and 8. By using a connecting bolt having a hexagonal hole 6a for rotation in its head as shown in FIG. 4, the diameter of the hole formed in the facing surface of the corner block 1 can be made small.

<<Example 2>> FIG. 5 is a schematic plan view showing the structure of a corner portion of Example 2.

In this embodiment, the bending angle α is 45 degrees.

The corner block 20 is columnar with a substantially pentagonal cross section, and has two finding surfaces 21 and 22 and two connecting surfaces 23 and 24. The angle formed by the finding surfaces 21 and 22 is equal to the bending angle α of the retaining wall 45
It has become a degree. The connecting surface 23 and the connecting surface 24 are at 90 degrees with respect to the finding surface 21 and the finding surface 22, respectively, and the angle formed by the connecting surfaces 23 and 24 is 45 degrees, which is equal to the bending angle of the retaining wall. ing.

The L-shaped retaining wall block 25 is connected to the connecting surface 23, and the L-shaped retaining wall block 26 is connected to the connecting surface 24 by bolts. Bottom plate 25 of L-shaped retaining walls 25, 26
The mutually overlapping portions of a and 26a are cutout portions 25
b, 26b. 27 is the part without a bottom plate, and this part will be filled with cast-in-place concrete for reinforcement.

<<Embodiment 3>> FIG. 6 is a schematic plan view showing the structure of a corner portion of Embodiment 3.

The connecting surfaces 31 and 32 of the corner block 30 form the same angle α as the bending angle α of the retaining wall. The finding surface 33 is a curved surface.

《Example 4》 Figures 7 to 9 relate to Example 4. Figure 7 is a schematic plan view showing the structure of the corner part of Example 4, and Figure 8
9 is a perspective view of the corner block 40, and FIG. 9 is a perspective view of the fixing member 43.

The corner block 40 has a doglegged cross-sectional shape, and the connecting surfaces 41 and 42 have an angular relationship equal to the bending angle of the retaining wall.

The connection with the L-shaped retaining wall block is as shown in Example 1 below.
It depends on the fixing method using bolts similar to
A fixing member 43 is used to fix the upper part. That is, the method is to embed an embedded nut 46 in the corner block 40 and the adjacent L-shaped retaining wall blocks 44 and 45, and then tighten the bolt 47 through the bolt hole of the fixing member 43. Although the fixing member 43 is made of angle-shaped steel processed into a dogleg shape, the fixing member 43 is not limited to this, and various steel materials can be used. Further, the fixing member is not limited to one stage, but can be fixed in multiple stages as necessary. The fixing method using a fixing member is suitable for use when the bending angle of the retaining wall is small or when the wall thickness of the retaining wall is thin, and reliable fixation can be expected.

《Example 5》 Figures 10 to 11 relate to Example 5.
The figure is a schematic plan view showing the structure of the corner portion of the fifth embodiment, and FIG. 11 is an assembled perspective view. The columnar block 50 is provided with a quadrangular pyramid-shaped notch 50a to match the shape of the L-shaped retaining wall block, which becomes thinner toward the top. The connecting surfaces 51 and 52 are in a relationship of 90 degrees, which is equal to the bending angle of the retaining wall, and a projection 54 is formed around the bolt hole 53 on the connecting surface. Correspondingly, depressions 58 are formed around the embedded nuts 57 of the L-shaped retaining wall blocks 55 and 56, and against the earth pressure, not only the shearing force of the bolts but also the shearing force of the concrete fitted with the unevenness is applied. You can expect it. Furthermore, by fitting the concave and convex portions, alignment of the blocks to be connected becomes easy. The L-shaped retaining wall blocks 55, 56 are provided with cutouts as shown at 56b in FIG. 11, from which anchors 59 protrude. Bottom plate parts 55a, 56
There is a gap between a and 10, as shown in No. 10, which is filled with cast-in-place concrete 60 to integrate the L-shaped retaining wall blocks 55 and 56. If further strength is required, for example, fill the bottom plate with cast-in-place concrete up to the line 61 in the same figure, or
It is also possible to form reinforced concrete on top of 5a and 56a. corner block 50,
The three L-shaped retaining wall blocks 55 and 56 are integrated to resist earth pressure.

<<Effects of the invention>> In the structure of the corner portion of the L-shaped retaining wall of the present invention, the corner block is extremely miniaturized, which improves efficiency in all aspects of its manufacture, movement, storage, and construction, resulting in cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing the structure of the corner part of Embodiment 1, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an assembled perspective view, and Fig. 4 is used for assembly. A perspective view of one example of the bolt, FIG. 5 is Example 2
FIG. 6 is a schematic plan view showing the structure of the corner portion of Embodiment 3, FIG.
Figures to Figures 9 relate to Example 4, and Figure 7 relates to Example 4.
8 is a perspective view of the corner block 40, FIG. 9 is a perspective view of the fixing member 43, and FIG. 10 is a schematic plan view showing the structure of the corner portion of Example 5. , FIG. 11 is an assembled perspective view, FIG. 12 is a schematic plan view showing the structure of a conventional corner portion, and FIG. 13 is a perspective view of a conventional corner block. 1... Corner block, 2, 3... Finding surface, 4, 5... Connection surface, 6... Bolt, 7, 8...
...L-shaped retaining wall block, 7a, 8a...bottom plate, 2
0... Corner block, 21, 22... Finding surface, 23, 24... Connection surface, 25, 26... L-shaped retaining wall block, 25a, 26a... Bottom plate, 30...
... Corner block, 31, 32 ... Connection surface, 3
3...Find surface, 40...Corner block, 4
1, 42... Connection surface, 43... Fixing member, 44,
45... L-shaped retaining wall block, 46... Embedded nut, 47... Bolt, 50... Corner block, 51, 52... Connection surface, 55, 56... L-shaped retaining wall block, 55a, 56a... Bottom plate, 60...
...cast-in-place concrete.

Claims (1)

[Claims for Utility Model Registration] (1) A columnar corner block having two connecting surfaces having an angular relationship equal to the predetermined bending angle of the retaining wall, each connecting surface having an overlapping portion of the bottom plate cut out. A corner structure of an L-shaped retaining wall characterized by connecting L-shaped retaining wall blocks. (2) An L-shaped retaining wall block with overlapping parts of the bottom plate cut out on each connecting surface of a columnar corner block that has two facing faces with a predetermined bending angle and a connecting face perpendicular to each facing face. The structure of the corner part of an L-shaped retaining wall is characterized by connecting. (3) Connect L-shaped retaining wall blocks with overlapping portions of the bottom plates cut out to each connecting surface of a columnar corner block that has two connecting surfaces that are in an angular relationship equal to the predetermined bending angle of the retaining wall. L
This is the structure of the corner part of a type retaining wall, in which a gap is provided between the bottom plates of the L-shaped retaining wall blocks connected to the columnar corner block, and the gap is filled with concrete to integrate both L-shaped retaining wall blocks. The structure of the corner part of an L-shaped retaining wall is characterized by: