JPH0548819B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reinforced earth retaining wall using grid or sheet as a reinforcing material, and particularly relates to a reinforced earth retaining wall that is resistant to destruction even if the wall is made of simple materials. Not regarding reinforced soil retaining walls.

[Conventional technology]

Reinforced earth retaining walls conventionally use metal strips, steel rods with anchor plates at the tips, metal or geotextile grids, synthetic resin sheets, etc. as reinforcement materials buried in the embankment, and these reinforcement materials are buried in the embankment. Lay it on the ground where it should be installed, connect one end to a concrete panel, and sprinkle soil on top of it.
It is constructed by forming an embankment layer by rolling and repeating this operation to bury a plurality of reinforcing material layers in the embankment layer.

[Problems to be solved by the invention]

However, in the above-mentioned retaining wall, it is necessary to use a reinforced concrete panel with sufficient thickness to withstand the earth pressure at the back of the wall, and to strengthen the connection between the reinforcing material and the wall where stress tends to concentrate. There is.

Furthermore, when using strips or steel rods with anchor plates at their ends as reinforcement, this reinforcement is only buried very sparsely in the direction perpendicular to the wall; It is not possible to directly hold the embankment layer in between, and it is necessary to supplement the area that cannot be held with walls. Therefore, it is necessary to use strong panels that are strong enough to withstand earth pressure as walls. Moreover, the earth pressure applied to the wall is large, which is not only structurally dangerous, but also
It is also economically disadvantageous.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a safe and economical structure which eliminates the drawbacks of the above-mentioned known techniques, which prevents stress concentration from occurring in the wall and therefore does not break even when a simple wall material is used. The purpose is to provide a reinforced earth retaining wall.

[Means for solving problems]

In order to achieve the aforementioned object, according to the present invention:
A wall formed by stacking blocks, an embankment formed by sprinkling and compacting earth and sand on the back of this wall, and multiple layers buried horizontally within this embankment.
In a reinforced soil retaining wall consisting of a reinforcing member connected to the wall at one end, a grid or sheet is used as the reinforcing member, and at least one unconnected reinforcing member is used between the upper and lower blocks to which the reinforcing member is connected. It is characterized by the presence of one layer of blocks.

Hereinafter, the present invention will be explained in detail using the accompanying drawings.

FIG. 1 and FIG. 2 are explanatory diagrams showing unit layers of the reinforced earth retaining wall according to the present invention, in which block 1
A wall body 2 formed by stacking up earth and sand, an embankment 3 formed by sprinkling earth and sand on the back side 2a of this wall body 2 and compacting it, and reinforcing material buried horizontally in multiple layers in this embankment 3. 4, 4, and is constructed by connecting one ends 4a, 4a of the reinforcing members 4, 4 to the back surface 2a of the wall body 2.

The reinforcing material 4 is a grid or a sheet, and the grid is made of synthetic resin or metal, or a metal made of a combination of vertical bars 4b and horizontal bars 4c as shown in FIGS. 1 and 2. It is made of expanded metal reinforced steel, etc., and the sheets are water permeable sheets made of synthetic resin,
Non-woven fabric etc.

As shown in FIGS. 1 and 2, the wall body 2 is constructed by stacking blocks 1 having stepped engaging portions 5 on the upper and lower surfaces, and engaging the blocks 1 and 1 between the upper and lower surfaces with each other at the engaging portions 5. and a reinforcing material 4 is provided on the back surface 2a.
One end 4a of the two is connected. In addition to what is shown in FIGS. 1 and 2, the engaging portion 5 may be a pair of projections and recesses on the upper and lower surfaces that engage with each other, as shown in FIGS. 3a and 3b, for example. Further, although not shown, the engagement may be performed by interposing mortar between the blocks, or by inserting a reinforcing rod 13 as shown in FIGS. 7a and 7b.

In the above-described present invention, the most distinctive feature is the upper block 1a to which the reinforcing members 4, 4 are connected.
and the lower block 1b there is at least one layer of blocks 1c to which no reinforcing material is connected.

The reinforcing material 4 can be connected to the wall 2 arbitrarily, but as shown in FIGS. 4 and 5, a plurality of arc-shaped mounting brackets 6 are arranged in parallel on every other layer of the block layer on the back surface 2a of the wall 2. The mounting rods 7 are inserted through the arcs 6a of the mounting brackets 6 arranged in parallel every other layer.
This may also be done by inserting and suspending the reinforcing member 4 in the lateral direction, and then folding back one end 4a of the reinforcing member 4 to the mounting rod 7.Alternatively, as shown in FIGS. 7a and 7b,
On the block layer on the back side 2a of the wall 2, apply L to every other layer.
A mounting bracket 6 made of shaped steel may be connected laterally along this block layer with a nut 8, and one end 4a of the reinforcing member 4 may be connected to the mounting bracket 6 made of L-shaped steel by welding or the like.

The reinforcing material 4 is connected to the wall 2 by attaching a plurality of arc-shaped mounting brackets 6 in parallel on every other layer to the block layer on the back surface 2a of the wall 2, as shown in Figure 6. Mounting rod 7 through arc 6a of metal fitting 6
This may also be done by inserting and suspending the reinforcing member in the lateral direction, attaching a pair of vertically arranged mounting rods 7, 7, and folding back one end 4a of the reinforcing member 4 so as to straddle both of the mounting rods 7, 7.

Moreover, as shown in FIG. 8, the retaining wall of the present invention has the following features:
It is also possible to cut out the block 1 at an arbitrary part of the wall and make an opening, and to cover this opening 9 with vegetation 10 such as flowers.

Regarding the construction method of the retaining wall of the present invention described above, the first
The following is an explanation using FIGS. 2 and 4, especially FIG. 4.

First, a single layer A (lowest layer) of the block 1 with the mounting bracket 6 installed on the back surface 2a is placed on the ground 11, and the mounting rod 7 is placed on the arc 6a of the mounting bracket 6.
is inserted and suspended laterally, and this back surface 2a
Soil is spread out and compacted to form embankment 3. Next, a reinforcing material 4 made of, for example, grid is laid on this, and one end 4a of this is folded back to the mounting rod 7. In this case, the reinforcing material 4 is simply folded back and a load is applied in the direction of the arrow, so it will not come off.

Next, blocks 1 similar to those described above are stacked on the single layer A to form the single layer B and the single layer C, and earth and sand is poured onto the reinforcing material 4 and compacted to raise the height of the embankment 3. When the embankment 3 reaches the mounting rod 7 of the single layer C, a reinforcing material 4 is further laid, and one end of this is folded back to the mounting rod 7.

By repeating this operation, the reinforcing material 4 is connected every other layer to the block layer on the back surface 2a of the wall 2 (for example, single layers A and C) as shown in FIG. To construct.

In addition, in the present invention, it is necessary that there be at least one block layer in which the reinforcing material is not connected, sandwiched between the block layers in which the reinforcing material is connected,
There may be more than one layer.

[Effect]

In the present invention, since there is at least one layer of blocks to which the reinforcing material is not connected between the upper and lower blocks to which the reinforcing material is connected, when large earth pressure is applied to the wall 2 as shown in FIG. The block 1' to which the reinforcing material is not connected is displaced at the joining part 5, and a slack part 12 is created on the back surface 2a side, and as a result, the earth pressure applied to the block 1' is reduced. For this reason,
The earth pressure applied to both blocks 1 and 1' becomes extremely small, and block 1' remains at most displaced as shown in the second figure, and by the time it is completely pushed outward or the wall itself is destroyed. Not enough. Therefore, in the present invention, even if excessive earth pressure is applied to the wall, the wall itself will not be destroyed even if the wall is made of a simple material.

In addition, in the wall body according to the present invention, since the blocks 1 and 1 located above and below are engaged with each other,
From this point of view, the wall will not be destroyed.

Furthermore, since grids or sheets are used as reinforcing materials in the present invention, they hold the entire embankment horizontally and are integrated with the embankment, so that almost no stress occurs at the connection with the wall. Moreover, the reinforcing material of the present invention adapts to the displacement of the embankment and has excellent soil retention ability, so even when a simple block is used, the wall will not break.

In addition, in the present invention, the block can be appropriately removed from the wall by taking advantage of the fact that the earth pressure applied to the wall is small.
By adding vegetation to the opening, a reinforced earth retaining wall with excellent scenery can be created.

〔Effect of the invention〕

As described above, since the present invention has a structure that reduces the earth pressure applied to the wall, the wall will not be destroyed even if simple materials are used, and the invention is extremely useful in practice.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing the unit layer of the present invention, FIGS. 3a and 3b are side views showing a specific example of the engaging part of the block of the present invention, and FIG. is a cross-sectional view of one specific example of the retaining wall of the present invention, FIG. 5 is a partial plan view of FIG. 4, and FIG. 6 is a perspective view of one specific example showing the connected state of the wall and the reinforcing material FIG. 7a is a side view showing another connected state, FIG. 7b is a plan view thereof, and FIG. 8 is a front view of the wall with vegetation. 1, 1'...block, 1a...upper block,
1b... lower block, 2... wall, 2a... back, 3... embankment, 4... reinforcing material, 4a... one end,
5...Engagement part, 6...Mounting bracket, 7...Mounting rod,
9... Opening, 10... Vegetation, 11... Ground, 12
...Loose part, 13...Reinforcement bar, A, B, C...
Single layer, X...Reinforced earth retaining wall.

Claims (1)

[Scope of Claims] 1. A wall body formed by stacking blocks, an embankment formed by sprinkling earth and sand on the back of this wall body and compacting it, and a plurality of layers buried horizontally in this embankment, In a reinforced soil retaining wall consisting of a reinforcing member connected to the wall at one end, a grid or sheet is used as the reinforcing member, and at least one unconnected reinforcing member is used between the upper and lower blocks to which the reinforcing member is connected. A reinforced earth retaining wall with one layer of blocks. 2. In the reinforced earth retaining wall according to claim 1,
This reinforced earth retaining wall is formed by cutting out a block at an arbitrary part of the wall body, creating an opening, and planting vegetation in the opening.