JP2831551B2 - Reinforced soil structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

This invention relates to a concrete block.
And filling the back with the embankment.
Embed multiple embankment reinforcements inside
Multiple stacking while connecting to the concrete block
The present invention relates to a reinforced earth structure constructed by the following.

[0002]

2. Description of the Related Art
(a), (b) shows an example of a conventional reinforced soil structure, in the figure, reference numeral 1 is stacked in a plurality of levels up to a predetermined height,
A concrete block 2 constituting the wall A is filled with a backfill of the wall A while being filled, and a reference numeral 3 is embedded in the fill 2 to reinforce the fill 2 and to fill each concrete block 1 with the fill 2 To the tip of
Embankment reinforcement .

In this type of reinforced earth structure, a relatively small-sized concrete block which can be constructed manually is used as the concrete block 1 constituting the wall A, so that the work is easy, and each concrete block is provided. 1 can move independently of each other, which is advantageous in that damage or destruction of the wall A due to stress concentration at the time of an earthquake or compaction of the embankment can be avoided.

On the other hand , each concrete block 1
Are not fixed by the embankment reinforcing material 3 for each block layer, so that all layers correspond to one concrete block 1 by the earth pressure applied to the concrete block 1 and the pull-out resistance of the embankment reinforcing material 3. It is extremely unstable because the reinforced soil structure is not balanced. In addition, the compaction of the embankment on the back of the concrete block is inadequately compacted due to the difficulty of the construction, and is liable to be deformed or collapsed.

However, a disadvantage of this reinforced earth construction method is that the minimum spacing in the height direction of the embankment reinforcing material required to resist the earth pressure applied to the wall is smaller than the height of a small concrete block suitable for manual work. Since the embankment reinforcing material is not connected to each concrete block layer because of the length of the concrete block layer, local instability or destruction of the concrete block as described below has been a problem for the above-described reason.

FIGS. 13 (a), 13 (b) and 13 (c) show an example of local destruction of a wall, in which (a) shows a concrete block 1 and embankment reinforcement during an earthquake or compaction. The state of rupture due to stress concentration at the joint with the material 3 is shown, (b) shows the displacement of a part of the concrete block, and (c) shows the fall of the part of the concrete block.

FIGS. 14 (a) and 14 (b) show a state in which the concrete blocks of FIG. 12 are stacked while being retracted (the embankment reinforcing material is not shown ).

In this method, as the concrete block 1 moves to the upper stage, the concrete pressure is gradually reduced and the earth pressure by the embankment 2 is reduced, so that all the concrete blocks 1 are supported by the embankment reinforcing material 3. Trying to solve the problem by not having.

However, in this case, since the load of the concrete block 1 acts on the outside of the heel 4, which is the heel portion of the wall A, the weight of the concrete block 1 concentrates on the backfill 2 at the back. If the embankment 2 in this portion does not have sufficient supporting force, or if the uniform strength is not maintained, a part of the concrete block 1 is displaced to the embankment 2 side, stress concentration occurs, and the like. Stabilize.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to prevent damage and destruction due to stress concentration at the time of an earthquake or rolling of an embankment, and to provide a reinforced soil structure which is extremely stable in strength. The purpose is to provide.

[0011]

Means for Solving the Problems Claim 1 according to the present invention.
The reinforced earth structure described is a concrete block
Fill in the back and fill in the fill
While embedding a plurality of reinforcing materials, one end of the
By stacking multiple while connecting to the REEAT block
In the reinforced soil structure to be constructed, the embankment reinforcing material and
And the concrete block on the surface of the embankment
Filling the first fill while connecting to each or some of the
The strong wood is spread from the surface part to the deep part of the embankment.
Second assortment while connecting to some of the concrete blocks
Embedding soil reinforcement in multiple layers, and
The soil reinforcement is made of synthetic wood such as geotextile or non-woven fabric.
It consists of a fat embankment reinforcement material.

[0012] Further , the reinforcing earth structure according to the second aspect is characterized in that
In the section, add a groove at the upper end of the concrete block.
The first embankment reinforcement material and the second embankment are provided in this groove.
Fit the ends of the reinforcements together with the horizontal bars and connect
I do.

[0013]

In the reinforced soil structure according to the present invention, FIG.
Concrete blocks 5 stacked as shown in (a) and (b), an embankment 6 in a certain area filled in the back of the concrete block 5, and a surface of a geotextile or the like embedded in the embankment 6 Made of embankment reinforcement
The block body B integrated with the first embankment reinforcing material 7 (FIG. 11)
(a) a, b, c, d), and each concrete block 5 is supported by a first embankment reinforcing material 7 in an embankment 6a, and a block body B is buried deeply horizontally in the embankment 6. Since the second embankment reinforcing material 8 strongly supports the concrete block 5, non-uniform stress concentration on the concrete block 5 can be avoided at the time of an earthquake or the compaction of the embankment 6a. As shown in FIG. 11 (b), even if the concrete blocks 5 are piled up while being set back as shown in FIG. since the load blocks also act, the load blocks a, b, c, it is supported by the first embankment reinforcement 7 in d, concrete No fear of block 5 moves to the 6 side fill, and without fear of extruded outward,
It can be said that this is an extremely stable reinforced soil structure.

[0014]

[Embodiment 1] 1 and 2 show an embodiment of a reinforced soil structure according to the present invention. In the drawings, reference numeral 5 denotes a concrete block which is stacked to a predetermined height and forms a wall A, and 6 denotes a concrete block.
The back of wall A made of concrete block 5
6a, especially near the wall A
From soil filled with solidified material filled over a predetermined area
The embankment, 7 is water in the embankment surface layer, especially in the embankment 6a.
Buried flat, with concrete block 5 and embankment 6a
Stable block body B (a, b, c, d in FIG. 1)
The first embankment reinforcing material constituting the embankment 8 is embankment 6a and embankment 6
Buried deep horizontally from embankment surface portion to fill deep portion within
Installed to support concrete block 5 and block body B
This is the second embankment reinforcing material.

The concrete block 5 may be of various shapes depending on the purpose, but generally a rectangular parallelepiped concrete block reinforced with a reinforcing bar or the like is used. It is formed in a size that can be handled relatively easily.

Usually, the size of the concrete block 5 is about 5 to 60 cm in height, 10 to 100 cm in width, 15 to 130 cm in depth, and about 15 to 100 kg in weight.

The upper and lower concrete blocks are connected by a connecting member 9 (also referred to as a dowel) made of a reinforcing bar, a synthetic resin rod or the like interposed between the upper and lower concrete blocks 5,5.

The connecting member 9 is composed of the upper and lower concrete blocks 5
Connection hole 5a formed at the center of the hole (also referred to as "dovehole")
Has been inserted. In this case, the connection hole 5a is formed slightly larger than the diameter of the connection member 9 so that the upper and lower concrete blocks 5, 5 can move to each other to some extent, and the concrete block 5 moves when the embankment 6 is rolled or during an earthquake. May be considered so as to avoid the destruction of the wall A due to stress concentration.

The dowel hole 5a is provided continuously with the upper and lower concrete blocks 5,5, and the connecting member 9 is inserted into the dowel hole 5a over the entire height, and the dowel hole 5a is filled with mortar. Is also good.

Further, the contact surfaces of the upper and lower concrete blocks may be engaged with each other by unevenness, or compressiveness may be added by interposing a cushion material therebetween.

The first embankment reinforcing material 7 is made of a soft synthetic resin.
Have surfaces like embankment reinforcement, for example, non-woven cloth or Geo Tekisutai
Or reinforced grit or expanded metal
And the like. And gold
Attach a supporting plate to the end of the band
An anchor bar may be used.

The first embankment reinforcing material 7 is provided in the embankment 6a.
Buried in multiple layers, one end of which is
Between blocks 5,5 or directly to concrete block 5
Have been.

Attach one end of the first embankment reinforcing material 7 up and down
Especially for the first embankment
If the strong material 7 is made of geote style or reinforced grit,
As shown in Fig.5 (a), (b), (c),
Attach the connecting bar 15 to the end of the 7, and
Groove formed at the upper end of concrete block 5
Fitted and connected to 13 and 14.

Such a planar embankment reinforcing material is used for surrounding embankments.
Easy to fit with the soil, embankment on the back of the concrete block
Excellent for holding and blocking .

The first embankment reinforcing material 7 is configured as described above.
From the concrete blocks 5
Concrete block on the embankment surface layer near the wall A
5 and the first embankment reinforcing material 7 and embankment 6a
A stable block body B is configured.

[0026] In addition, during the compaction of fill 6a, the first Sheng
The local stress concentration on the concrete block 5 can be prevented by the stress dispersing effect of the earth reinforcing material 7, and breakage or the like can be avoided.

The second embankment reinforcing material 8 is provided in the embankment 6a and the embankment 6 from the embankment surface layer so that the concrete block 5 and the block body B can be firmly supported and fixed in a stable state.
It is buried horizontally and deep down to the deep part of the embankment .

The second embankment reinforcing material 8 may be one or more.
First fill between every few concrete blocks 5,5
Is connected in the same way as the stiffener 7, or
It is connected to the hook 5b protruding from the back,
Is connected to the contact surface of the concrete block via the connecting rod 9.
Is tied.

Further, the second embankment reinforcing material 8 is the first embankment.
Similar to the reinforcing member 7 , the reinforcing member is made of synthetic resin, non-woven fabric, geotextile, reinforcing bar grit, expanded metal, or a belt-like reinforcing member or a bearing anchor (a reinforcing member in which a bearing plate is connected to an end portion of an anchor bar of a reinforcing bar). ing.

Embodiment 2 FIG. 3 and 4 show another embodiment of the reinforced soil structure according to the present invention, in which the second embankment reinforcing material 8 is not directly connected to the concrete block 5 but is connected to the first embankment reinforcing material 7. The distal end is connected via a connecting member 10. Other configurations are almost the same as those of the first embodiment.

According to this embodiment, the first embankment reinforcing material 7
And the second embankment reinforcing material 8 can also be used for each other, so that there is an effect that the reinforcing members can be saved.

FIGS. 5A, 5B and 5C show concrete blocks.
5, grit-like configuration, for example,
Or the end of the first embankment reinforcement 7 made of reinforcing steel grit or the like
The first embankment reinforcing material 7 is connected to the end.
Attach the connecting bar 15 and concrete together with the connecting bar 15
Fit into the grooves 13 and 14 formed in the upper end of the block 5
Are connected by

Incidentally, in FIG.
Grooves respectively formed at the upper end of the cleat block 5
It is. Fig. (B) shows the first grid in the form of a grid.
Shows the state where the horizontal bar 15 is attached to the end of the soil reinforcement 7
And further FIG. (C) is a transverse bar 15 concrete block 5
Or a grit warp into groove 14
Shows the state of being inserted.

This connecting method is based on the second embankment reinforcing material.
8 used to connect concrete block 5
Can also be. By stacking the units having such a structure, a reinforced soil structure as shown in FIGS. 11 (a) and 11 (b) can be constructed.

Embodiment 3 FIG. FIGS. 6 and 7 show another embodiment of the reinforced soil structure according to the present invention, in which the concrete block 5 constituting the wall A is gradually set back toward the embankment 6a as it goes upward.
To reduce the earth pressure by stacking
You.

In this case, the heel which is the heel of the wall A
Also act load of concrete block 5 is outside the 11, the concrete block 5 and fill 6a of the back first
Block body B stabilized by one embankment reinforcing material 7 (see FIG.
6 , a, b, c, d), so that a part of the concrete block 5 is displaced to the embankment 6a side,
Also, there is no such thing as being pushed out,
It is stable in strength. Other configurations are exactly the same as those of the first embodiment.

Embodiment 4 FIG. 8 to 9 show another embodiment of the reinforced soil structure according to the present invention. In the drawings, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 12 denotes a concrete block which is stacked in a plurality of stages up to a predetermined height and constitutes the wall A.
The concrete block 12, like the concrete block 5, is a plain concrete block or a concrete block reinforced with a reinforcing bar or the like, and is formed in such a size that it can be easily handled by human power.

The concrete block 12 has a concave portion 12a of a predetermined depth which is opened right above so as to allow planting of trees.

Further, as the concrete block 12 becomes upper, so that a tree can be planted in the concave portion 12a at the tip portion,
It is set back to the embankment 6a side gradually, and the upper and lower concrete blocks 12, 12 are stacked while being shifted left and right. Other configurations are the same as those of the first embodiment. According to this embodiment, there is an effect that the retaining wall can be easily greened.

In Examples 1 to 8, embankment 6 and
6a includes a wide range of local embankment materials, lightweight soil such as foamed lightweight mortar, lightweight synthetic resin blocks, and sediment containing solidified material.
Are used . In particular, it is more preferable to use earth and sand containing a solidifying material such as soil cement as the embankment in the block areas a, b, c, and d in FIGS. 11 (a) and 11 (b).

In the present invention, the first embankment reinforcing member 7 is provided between the second embankment reinforcing members 8 as shown in FIG.
As shown in (b), the first embankment is placed between the second embankment reinforcements 8.
There may be a portion where the soil reinforcing material 7 does not exist.

[0043] In addition, by earth pressure conditions and site situation, the
There may be no layer of the first embankment reinforcement 7 corresponding to the number of all the concrete blocks 5 between the two embankment reinforcements 8, and a portion of the concrete block 5 where the first embankment reinforcement 7 is not attached is provided. There may be.

[0044]

[Effects of the Invention] The invention has the configuration described above,
Concrete blocks, especially as embankment reinforcement,
Place each of the concrete blocks on the surface
Or the first embankment reinforcement while connecting to several
From the surface part of the embankment to the deep part, the concrete
Connect the second embankment reinforcement while connecting to some of the blocks
Each buried in multiple layers, and the first embankment reinforcing material
From the planar embankment reinforcement, such as geotextiles and non-woven cloth
Therefore, the following effects are obtained.

The very shallow part of the embankment , close to the wall
The first embankment reinforcement installed at the location is a geotextile
Because it is a soft planar embankment reinforcing material
Easy to soil and familiar Lee heat block back, and blocking
Easy to do.

Therefore, the concrete block and the first
Lido reinforcement and concrete blocks Sheng of near constant area
The soil makes up a block that is stable in strength.
It is, moreover the block body is horizontally deep buried of fill
What is supported by a plurality of second embankment reinforcement material which
And the displacement is small and the strength is extremely stable .

Further, since the block body itself is extremely stable, the second embankment reinforcement for supporting the block body is provided.
Wood is requires a relatively small amount, the reduction of labor and the number of days required for the installation of the second embankment reinforcement, furthermore the second Sheng
This has the effect of reducing the amount of soil reinforcement and increasing economic efficiency.

Each concrete block is provided with a first embankment reinforcing material buried at a relatively shallow position near a wall.
Supported by, especially the first embankment reinforcement is soft,
Surface, such as prime soil and familiar easy geotextile or non-woven fabric
Than consisting Jo embankment reinforcements, each concrete block
It is stable by itself, even if you do not completely fix each other.
You.

Therefore, during the earthquake and the compaction of the embankment, stress concentration does not occur, so that the wall itself is not destroyed,
In addition, since the stress is dispersed without generating a large displacement, there is an effect of avoiding breakage due to stress concentration.

Also, the upper end of the concrete block
The first embankment reinforcing material in this groove ,
The ends of the second embankment reinforcement are connected to each other via horizontal bars
Since then it is, first fill reinforcement and a second fill reinforcement
The connection can be made securely and firmly without damaging the edges of the material.
Wear.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a reinforced soil structure according to the present invention.

FIG. 2 is a partially enlarged longitudinal sectional view of the reinforced soil structure shown in FIG.

FIG. 3 is a longitudinal sectional view of another embodiment of the reinforced soil structure according to the present invention.

4 is a partially enlarged longitudinal sectional view of the reinforced soil structure shown in FIG.

5A is a perspective view of another concrete block, FIG. 5B is a perspective view showing an example of a first embankment reinforcing material, and FIG.
FIG. 2 is a cross-sectional view of a concrete block showing an installed state of a first embankment reinforcing material.

FIG. 6 is a longitudinal sectional view of another embodiment of the reinforced soil structure according to the present invention.

FIG. 7 is a partially enlarged longitudinal sectional view of the reinforced soil structure shown in FIG.

FIG. 8 is a partial plan view of another embodiment of the reinforced soil structure according to the present invention.

9 is a sectional view taken along line aa in FIG.

FIG. 10 is a perspective view of a concrete block.

FIGS. 11 (a) and 11 (b) are longitudinal sectional views showing the operation of the reinforced soil structure according to the present invention.

12A and 12B are longitudinal sectional views showing an example of a conventional reinforced soil structure.

FIG. 13 is a longitudinal sectional view showing an example of a mode of destruction of a conventional reinforced soil structure.

FIG. 14 is a longitudinal sectional view showing the operation of a conventional reinforcing soil structure.

[Explanation of symbols]

1: concrete block, 2: embankment, 3: embankment supplement
Strong material , 4 ... Heel, 5 ... Concrete block, 6,6a
... embankment, 7 ... first embankment reinforcement material , 8 ... second embankment reinforcement
Material , 9 connecting member, 10 connecting member, 11 heel, 12 concrete block, 12a recess, 13, 14 groove, 15 horizontal bar.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 17/18

Claims (2)

(57) [Claims] (1) A concrete block is piled on its back.
While filling the embankment, and filling the embankment with embankment reinforcing material
While burying a plurality of them, one end of the
It is constructed by stacking multiple
In the reinforcing soil structure to be, as the embankment reinforcing material,
The concrete block on the surface of the embankment
First fill reinforcement while connecting to each or several
From the surface part to the deep part of the embankment.
Second fill while connecting to some of the cleat blocks
The reinforcing material is embedded in a plurality of layers, respectively, and
Do not form the reinforcement from synthetic resin sheet embankment reinforcement.
A reinforced earth structure characterized by the fact that: 2. A concave groove is formed at the upper end of the concrete block.
The first embankment reinforcing material and the second embankment
Do not connect the ends of the soil reinforcements via horizontal bars.
The reinforced soil structure according to claim 1, wherein