JPH07138970A - Concrete structure, method of manufacturing concrete structure and concrete block used for constructing concrete structure - Google Patents

Abstract

PURPOSE:To make it possible to reduce or eliminate framing works, reduce burdens and man-power of workers by reducing or eliminating works for assembling a scaffold when the height of a concrete structure exceeds specific length, and at the same time, shorten a construction period and to progress works by a small number of workers to promote economic efficiency. CONSTITUTION:Concrete blocks 8 as form materials are arranged to form concrete retaining walls 7. After that, the concrete retaining walls 7 are gradually piled up at a site by integrating the concrete blocks 8 and cast-in-place concrete G placed to the insides of them into a unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete structure, a method for forming the concrete structure, and a concrete block used for forming the concrete structure.

[0002]

2. Description of the Related Art Conventionally, as an example of a concrete structure, when a concrete retaining wall is cast in situ, a so-called weir board that directly contacts the concrete and a support material that supports the weir board. It is necessary to form a formwork consisting of etc. at the site, and when that formwork is completed, concrete is placed in the formwork, and after curing, the formwork is removed to create a concrete retaining wall of a specified shape. Is forming. And, at the work site where the height of the concrete retaining wall exceeds a predetermined length, that is, 2 meters, according to the occupational safety and health regulations,
It is required to build a scaffold with temporary materials.

As described above, the cast-in-place concrete retaining wall requires time and labor for assembling the formwork on the site, and when the height of the retaining wall exceeds 2 meters, it also requires time and effort for assembling scaffolding. Therefore, there is a problem that many workers are required to perform the work.

The present invention has been made in view of the above-mentioned conventional defects, and an object of the present invention is to reduce or eliminate the work of assembling a formwork, and moreover, to achieve a height exceeding a predetermined length. Even with the concrete structure, the work load and labor of the worker can be reduced by reducing or eliminating the work for assembling the scaffold, and the work period can be shortened. It has excellent economic efficiency, such as
A concrete structure, a method for forming the concrete structure, and a concrete block used for forming the concrete structure.

[0005]

In order to achieve the above object, a concrete structure according to the present invention has the following constitution. That is, a concrete structure cast in situ, as a form material for forming the structure,
It is formed by arranging a concrete block and integrating this concrete block and the cast-in-place concrete that is placed on the inner surface side of the concrete block.

Further, the concrete structure according to the present invention is a lower-stage concrete structure formed by integrating the lower-stage concrete block and the lower-stage cast-in-place concrete placed on the inner surface side thereof. It is formed by stacking and arranging the above-mentioned concrete block on the upper tier side and the upper tier side concrete structure to be formed by integrating the upper tier concrete cast on the inner surface Is preferred.

A concrete structure forming method according to another invention has the following constitution. That is, by placing a concrete block as a form material for forming a concrete structure that is cast in situ, and integrating this concrete block and the cast in situ cast on the inner surface side of the concrete block, Form a structure.

A concrete structure forming method according to another invention has the following constitution. That is, as a form material for forming the lower-stage concrete structure that is cast in place, the lower-stage concrete block is arranged, and this concrete block and the lower-stage side cast concrete that is cast on the inner surface side By integrating,
Form the lower concrete structure. Then, on this lower concrete structure, as a formwork material for forming the upper concrete structure cast in situ, the upper concrete blocks are stacked and arranged on the lower concrete structure. The upper side concrete structure is formed by integrating the side concrete block and the upper side cast-in-place concrete that is placed on the inner surface side.

An engaging portion is formed in the lower-stage cast-in-place concrete, and concrete is poured through the engaging portion so that the lower-stage cast-in-place concrete and the upper-stage cast-in-place concrete are engaged with each other. Is preferred.

It is preferable that the concrete block and the cast-in-place concrete to be cast are connected and fixed by a fixing member for preventing displacement.

A method of forming a concrete structure according to another invention has the following constitution. That is, as a form material for forming a concrete structure that is cast in situ, concrete blocks that are held by the spacing members so as to be opposed to each other at predetermined intervals are arranged, and these concrete blocks and their inner surfaces are arranged. A concrete structure is formed by integrating the cast-in-place concrete cast on the side.

A concrete block used to form a concrete structure according to another invention is
It consists of the following components. That is, a concrete block that is used to form a concrete structure that is cast in place, and on the inner surface side of the concrete block, to strengthen the integration of the concrete block and the cast concrete that is cast. The rough surface portion, the uneven portion, or other coupling means is provided.

On the top side of the concrete block,
In order to prevent misalignment with another concrete block stacked on the concrete block, a top side locking part that engages with a bottom side locking part formed on the bottom side of another concrete block is formed. Is desirable.

[0014]

[Function] A concrete block is arranged as a formwork material for forming a concrete structure, and then this concrete block and the cast-in-place concrete to be cast on the inner surface side are integrated to form a concrete structure. Objects can be formed on-site. Therefore, a mold is not required at the place where the concrete block is arranged, and the labor of the frame work can be eliminated. However, the place where the concrete block is arranged as the form material does not necessarily have to be the entire circumference on the side wall side of the concrete structure. By arranging concrete blocks as a form material around the entire circumference of the concrete structure, the work of framing the form can be completely eliminated. Also,
Even for a concrete structure with a height exceeding a predetermined length,
If concrete blocks are arranged as the formwork material, the scaffolding necessary for assembling the formwork is unnecessary, and therefore, at the place where the concrete blocks are arranged, it is not necessary to form the scaffolding and the work amount is reduced. Furthermore, if concrete blocks are arranged around the entire circumference of the concrete structure as a form material, the work of assembling the scaffold can be completely eliminated.

The lower-stage concrete structure is formed by integrating the lower-stage concrete block and the lower-stage cast-in-place concrete that is placed on the inner surface side thereof. On the lower-stage concrete structure, by integrating the upper-stage concrete block and the upper-stage cast-in-place concrete placed on the inner surface side, the upper-stage concrete structure to be formed can be stacked and arranged,
A concrete structure of the required height is formed.

An engagement portion is formed on the lower-stage side cast concrete, and the lower-stage side cast concrete and the upper-stage side cast concrete are engaged with each other through the engaging portion, so that the lower-stage concrete structure The displacement between the upper concrete structure and the upper concrete structure is prevented.

Since the concrete block and the cast-in-place concrete to be cast are connected and fixed by a fixing member for preventing displacement, the concrete block and the
Positional deviation from in-place concrete is prevented.

The concrete blocks held by the space holding member so as to face each other at a predetermined space and the cast-in-place concrete cast on the inner surface side of these concrete blocks are integrated to thereby maintain the space. A concrete structure having a predetermined wall thickness defined by the members is formed.

On the inner surface side of the concrete block,
Since a rough surface portion, a concavo-convex portion or other connecting means for strengthening the integration between the concrete block and the cast-in-place concrete to be cast is provided, the concrete block and the cast-in-place concrete to be cast are The contact area between the two increases, resulting in an increase in the bonding force between them.

On the top side of the concrete block, there is formed a top side engaging portion which engages with a bottom side engaging portion formed on the bottom side of another concrete block stacked on the concrete block. Therefore, it is possible to prevent the positional deviation between the concrete block and another concrete block stacked on the block.

[0021]

EXAMPLES Hereinafter, concrete structures according to the present invention,
An embodiment of a concrete structure, a method for forming a concrete structure, and a concrete block used for forming the concrete structure will be described with reference to the drawings.

As an example of the concrete structure, the concrete block 8 used to form the gravity type concrete retaining wall 7 shown in FIG. 1 has a predetermined width and height as shown in FIG. It has a standing wall portion 9 and a retaining portion 10 that is connected to a lower portion 9a of the standing wall portion 9 so as to be substantially orthogonal to the standing wall portion 9, and the side surface thereof has a substantially L-shape. . The concrete retaining wall 7 can be formed on site by integrating the concrete block 8 and the cast-in-place concrete G that is placed on the inner surface side in a manner described later.

First, the concrete block 8 will be described.

Retaining portion 10 of concrete block 8
Are two narrow tabs 10 spaced apart from each other.
The narrow retaining portions 10a made of a are arranged so as to be located inside the side end of the standing wall portion 9. In addition, the length in the width direction of each narrow width reserve portion 10a is
The reason for making it shorter than the length of the standing wall portion 9 in the width direction is as follows.
In order to reduce the weight of the entire concrete block 8 and to make it possible to use a small one, for example, a transfer machine such as a hawk lift and a transport vehicle such as a dump truck or a truck for moving and transporting it. Is.

The wall thickness of the standing wall portion 9 is substantially constant from the upper end portion thereof to the middle portion T at a position at a substantially intermediate height, but below the middle portion T, each narrower width than the standing wall portion 9. Is gradually thickened so as to form an inclined surface 9b having a downward slope toward the reserved portion 10a. In addition, the lower portion 9 of the standing wall portion 9
a (lower part 9 lower than the upper surface Q of the reserve part 10)
In a), a groove 9c extending in the width direction of the standing wall portion 9 is formed. The reason for forming the groove 9c is mainly to increase the contact area between the concrete block 8 and the cast-in-place concrete to be described later to increase the bonding force between the concrete block 8 and the cast-in-place concrete. Is.

Further, the standing wall portion 9 and each narrow width retaining portion 1
The standing wall portion 9 is provided above the connecting portion R in which 0a is connected.
The thick portion N protruding from the inner side surface F in the direction of the reserved portion 10 side
Are formed in the vertical direction of the standing wall portion 9, and the length of the thick portion N in the width direction is set to the narrow portion 10a of each narrow width.
Is about the same as the length in the width direction. The reason why the thick portion N is formed in this manner is that, although the amount of concrete for forming the thick portion N is small, the structural wall 8 and the concrete block 8 are structurally structured. This is to contribute to the increase in strength. However, it is desirable that the thick portion N is formed, but if the structural strength is sufficient, it is not always necessary.

Further, the thick portion N has a vertical surface N2 extending substantially vertically from the upper end portion to the intermediate portion T, and below the intermediate portion T, from the standing wall portion 9 each. It has an inclined surface N3 with a downward slope toward the narrow reserve portion 10a, and further below the slope portion Y near the upper surface Q of each narrow reserve portion 10a, the narrow reserve portion 10a of each narrow width is formed. It has a downwardly sloping slope N4 that extends greatly in the distal direction. However, the length in the width direction of the thick portion N may be slightly longer or shorter than the length in the width direction of each narrow width reserved portion 10a, and the vertical surface N2 and the inclined surface may be used. N3 and N4 may not have the above-mentioned shape.

The inner surface F of the concrete block 8
In order to reinforce the integration of the concrete block 8 and the cast-in-place concrete G to be cast, a convex portion as a connecting means, that is, a plurality of protruding portions 11 are projected in the direction of the retaining portion 10a. It is provided. That is, the inner surface F of the concrete block 8 including the inclined surface 9b, and the vertical surface N2 and the inclined surface N3 of the thick portion N.
A plurality of protrusions 11 extending in the direction of the retaining portion 10a are formed on the. The reason for forming these protrusions 11 is mainly to increase the contact area between the concrete block 8 and the cast-in-place concrete G that is cast on the inner surface side of the concrete block 8 to increase the concrete block 8 and the cast-in-place concrete G. The wall thickness of the concrete block 8 is increased by increasing the coupling force between
This is for forming a united product that can be included in the wall thickness of the concrete retaining wall 7 in structural calculation. Further, not only the inner surface F of the concrete block 8 but also the top surface or the side surface of the retaining portion 10 is provided with an uneven portion for strengthening the integration of the concrete block 8 and the cast-in-place concrete G to be cast. Etc. may be provided.

In addition to increasing the contact area of each of the projections 11 as much as possible, the concrete block 8 and the cast-in-place concrete G do not easily come off from each other. It is preferably formed in a truncated cone shape whose diameter gradually increases toward the end. However, the shape of the protrusion 11 does not necessarily have to be formed in such a shape, and the concrete block 8 and the cast-in-place concrete G are
As long as the shapes are such that they do not easily come off from each other, are difficult to separate from each other, or are not easily sheared, convexes or concaves of other shapes may be formed on the inner surface side of the concrete block 8, and these convexes and concaves may be formed. Instead, a rough surface portion may be formed.

As a method of forming the rough surface portion, for example, a delay material is applied in advance to the surface of the mold for producing the concrete block 8 which comes into contact with the concrete to be poured, and the mold is then formed. After concrete is poured into the interior of the concrete block to cure it, the formwork is removed, the concrete block 8 is formed, and then the outer surface of the concrete block 8 which is in contact with the application surface of the retarder is washed off. Further, on the inner surface F of the concrete block 8, in addition to the protrusion 11, for example, a metal material such as shown in FIGS. 3 to 5,
An L-shaped coupling means L, a T-shaped coupling means T, and a U-shaped coupling means K made of resin material, concrete material, or the like.
May be formed, or other coupling means having another shape may be formed. At that time, these connecting means may be integrally formed with the concrete block 8 or may be attached later as a separate body.

Further, the concrete block 8 and the cast-in-place concrete G are fixed by a fixing member 14 for preventing positional displacement.
It is preferable that they are connected and fixed by. That is, a plurality of hole portions 1 extending in the height direction are provided in each of the reserve portions 10a.
3 are bored, and fixing members 14 such as reinforcing bars are inserted into the holes 13 and filled with mortar. Thereby, the fixing member 14 firmly joins the concrete block 8 to the cast-in-place concrete G, and the positional displacement between them does not occur. However, the fixing member 14 does not necessarily have to be a reinforcing bar, and may be any other member such as a foundation bolt as long as it can prevent the displacement between the concrete block 8 and the cast-in-place concrete G. . Further, the contact portion between the concrete block 8 and the cast-in-place concrete G is provided with, for example, an engaging portion such as a convex portion or a concave portion, so that the positional displacement between the concrete block 8 and the cast-in-place concrete G can be prevented. With the structure, the fixing member 14 does not necessarily have to be used.

As shown in FIG. 6, a top block 8a of the concrete block 8 is provided with, for example, a top locking portion 12a having a convex shape, and a bottom block 8b thereof is provided with a top locking portion 12a. The bottom side locking portion 12b having a concave shape or the like may be formed. Then, by fitting the top locking portion 12a having a convex shape and the bottom locking portion 12b having a concave shape, a concrete block 8 and another concrete block 8 stacked on the concrete block 8 are formed. It is possible to prevent the displacement of the position. However, the top side locking portion 12a formed on the top portion 8a side of the concrete block 8 does not necessarily have to be a convex shape or the like, and the top portion 8a side of the concrete block 8 and the bottom portion 8b side of another concrete block 8 Other shapes and structures may be used as long as the positional displacement between them can be prevented. Similarly, the bottom side locking portion 12b formed on the bottom portion 8b side of the concrete block 8 does not necessarily have to be a concave shape or the like. Other shapes and structures may be used as long as they correspond to the shape of the locking portion 12a formed on the side of the top portion 8a.

The shape of the concrete block is not necessarily limited to the above-mentioned shape, and for example, an L-shaped concrete block 15 as shown in FIG.
Alternatively, it may be a so-called inverted T-shaped concrete block 16 as shown in FIG. Similarly, FIG.
The concrete block 17 may have a supporting portion 17c provided between the standing wall portion 17a and the retaining portion 17b, as shown in Fig. 7, and may have a shape other than that, for example, a concrete shape as shown in Fig. 10. Block B may be used.

Further, although the concrete block 8 shown in the above embodiment has a structure in which the standing wall portion 9 and the retaining portion 10 are connected in advance, the structure is not necessarily limited to this structure. As will be described below, it is possible to separately form the standing wall portion and the retaining portion. That is,
In the concrete block 19 shown in FIG. 11, for example, a metal member 20 such as iron, which is formed by welding a pair of H-shaped steel materials 20a into an L-shape, is attached to the mounting hole 20c of the steel material 20a and the concrete block. The bolts S1 are passed through the respective mounting holes 19a at both end portions of 19 and the tip portions of the respective bolts S1 are fastened by nuts S2, whereby the plate-shaped standing wall portion 21 can be assembled at both end portions.

Then, the concrete block 19 can be formed by assembling the standing wall portion 21 and the metal member 20 thereof with the fastening members such as the bolt S1 and the nut S2, for example, at an installation site. The metal member 20 is not limited to the above-described shape and the like, and may have any other shape as long as the standing wall portion 21 can be held in a standing state, and the metal member 20 is not limited to iron. Further, the method of fixing the concrete block 19 and the metal member 20 is
Other fixing members or fixing methods may be used.

Further, the concrete block 8 shown in FIG. 2 has a flat wall 23 as shown in FIG.
And a concrete block piece 24 composed of the thick portion N and the narrow portion 10a may be separately molded. As a result, concrete block pieces 2
Bolts S3 penetrate through the mounting holes 24a of No. 4 and the mounting holes 23a of the standing wall portions 23, and the tip end of each bolt S3 is inserted into the nut S.
By tightening with 4, the concrete block piece 24 can be assembled to the plate-shaped standing wall portion 23. Then, the standing wall 23 and the concrete block piece 24
The concrete block 8 as shown in FIG. 2 can be formed by assembling the bolts and the bolts with the fastening members such as the bolt S3 and the nut S4, for example, at the installation site.

Further, the concrete blocks may be extremely small or may not be provided at all if the concrete blocks can be arranged and piled up at the installation site so as not to fall down. For example, a concrete block C1 shown in FIG. 13 has a shape in which a base W1 having a U-shaped cross section is provided in the lower portion of the standing wall 9, and another concrete block C1 is provided in the groove U of the base W1. By inserting the tip of the standing wall 9 of C1, the concrete block C1
Can be stacked without defeating. In addition, FIG.
The concrete block C2 shown in FIG. 2 is formed by connecting the L-shaped wall W2 to the lower end of the standing wall portion 9, and the L-shaped wall W2 and the tip of another concrete block C2 are overlapped with each other. By fixing with a tightening member such as the bolt B1, the concrete block C2 can be stacked without falling. Further, if the pulling line P is attached to the standing wall portion 9 of the concrete block C3 shown in FIG. 15 and the end of the pulling line P is wound around the anchor A or the like around the cast-in-place concrete G and pulled, the reserve portion 10 is obtained. Even if the size is small, the concrete block C3 can be stacked without falling.

Next, a concrete retaining wall formed by using the above-mentioned concrete block and a method for forming the concrete retaining wall will be described.

As shown in FIG. 1, the concrete retaining wall 7 has a footing 27 formed on a foundation stone 26, and a concrete block 8 is formed on the footing 27.
And the cast-in-place concrete G that is placed on the inner surface side thereof are integrated. That is, concrete blocks 28 having the same shape as the concrete blocks 8 are arranged at predetermined positions on the front and rear sides of the foundation stone material 26 as a form material for forming the footing 27, separated by a predetermined distance. Then, in this state, the basic concrete 29 is placed in the space sandwiched between the front and rear concrete blocks 28.

Then, the poured concrete foundation 29
However, when it is cured and hardened, the foundation concrete 29
At a predetermined position on the upper front side, the concrete retaining wall 7 on the lower side
The lower concrete block 8 is arranged as a form material for forming the. Similarly, foundation concrete 29
At a predetermined position on the upper rear side, the lower mold material 30 including the weir board 30a and a support material (not shown) that supports the weir board 30a is arranged in a frame on the site.

At this time, since the rear side of the lower concrete retaining wall 7 needs to be an inclined surface which inclines forward as shown in the drawing, the weir plate 30a is arranged so as to incline forward and By fixing with a support material or the like and filling the mortar into the hole portion 13 of the concrete block 8 on the front side through a fixing member 14 such as a reinforcing bar that has been erected in advance on the basic concrete 29, the lower front side The concrete block 8 is firmly connected and fixed to the basic concrete 29. After that, concrete 31 is poured up to a predetermined upper position L1 in a space sandwiched between the lower concrete block 8 on the front side and the mold material 30 arranged on the rear side.

The cast-in-place concrete 31 is
In a stage before hardening, at a predetermined position near the center of the upper surface of the concrete 31, a form member 32 including a weir plate 32a and a support material (not shown) that supports the weir plate 32a is assembled, and in that state, Concrete 33 is poured up to a predetermined upper position L2 in a space sandwiched between the form material 32 and the upper side of the lower front concrete block 8.
When the cast-in-place concrete 31 and 33 that has been set has hardened, the form material 32 is removed to form a concrete convex step portion 34 as an engaging portion on the lower stage side on the cast-in-place concrete 31. In addition, the reason for forming the concrete convex step portion 34 as the engaging portion on the lower step side is that the concrete pouring concrete 31 on the lower step side and the first upper step side pouring step on the next side through the concrete convex step portion 34. This is for preventing the positional displacement between the concrete retaining wall 7 on the lower tier side and the concrete retaining wall 7 on the first upper tier side by the engagement with the concrete 36. The shape and structure are not limited to those shown in the figures, and the formation of the engaging portion may be omitted in some cases.

Then, at the predetermined position on the concrete convex step portion 34 and the concrete block 8 on the lower step side, the first
A first upper concrete block 8 is arranged as a form material for forming the upper concrete retaining wall 7. In addition, on the lower mold frame member 30, the first upper mold frame member 35, which includes the weir plate 35a and a support member (not shown) for supporting the weir plate 35a, is assembled on a scaffolding site. Arrange it as a framework. At that time, since the rear side of the first upper-stage concrete retaining wall 7 needs to be an inclined surface inclined forward, such that it is connected to the rear-side inclined surface of the lower concrete retaining wall 7, The plate 35a is arranged so as to be inclined toward the front side, and is fixed by a support member or the like. Then, through the hole 13 of the concrete block 8 on the first upper stage side, the fixing member 14 such as a reinforcing bar which has been erected in advance on the cast-in-place concrete 33 is passed, and by filling the mortar, 1. The concrete block 8 on the upper stage side is firmly connected and fixed to the concrete convex step portion 34. afterwards,
Concrete 36 is poured to a predetermined upper position L3 in the space sandwiched by the inner surface of the first upper concrete block 8 and the front surface of the form material 35 arranged on the rear side.

The cast-in-place concrete 36 is
In a stage before hardening, at a predetermined position near the center of the concrete 36 upper surface, a frame member 37 composed of a dam 37a and a support material (not shown) for supporting the dam 37a is assembled, and in that state, Concrete 38 is poured up to a predetermined upper position L4 in the space sandwiched by the form material 37 and the upper side of the first upper concrete block 8.
When the cast-in-place concrete 36 and 38 has been hardened, the form material 37 is removed to form a concrete convex step 39 as an engaging portion on the first upper stage side on the cast-in-place concrete 36. It The reason why the concrete convex step portion 39 is formed as the first upper step side engaging portion is the same as the reason that the concrete convex step portion 34 is formed as the lower step side engaging portion.

Then, at a predetermined position on the concrete raised step portion 39 and the concrete block 8 on the first upper step side,
A second upper stage concrete block 8 is arranged as a form material for forming the second upper stage concrete retaining wall 7. In addition, the weir plate 41 is provided on the mold material 35 on the first upper stage side.
a and a supporting member (not shown) for supporting the weir board 41a
The second upper-stage side mold material 41 made of, for example, is arranged as a scaffold on the site by scaffolding. At that time, the rear side of the second upper-stage concrete retaining wall 7 needs to be an inclined surface inclined forward such that it is connected to the rear-side inclined surface of the first upper-side concrete retaining wall 7. The weir board 41a is arranged so as to be inclined toward the front side, and is fixed by a supporting member or the like. Then, the hole 13 of the concrete block 8 on the second upper stage side
The fixing member 14 such as a reinforcing bar which has been erected in advance on the cast-in-place concrete 38 is passed through and is filled with mortar, so that the fixing member 14 can fix the concrete block 8 on the second upper stage side to the concrete. It is firmly connected and fixed to the convex step portion 39. Then, a predetermined upper position L in the space sandwiched by the inner surface of the second upper concrete block 8 and the front surface of the form material 41 arranged on the rear side.
Up to 5, concrete 42 is poured.

The cast-in-place concrete 42 is
The entire concrete retaining wall 7 in which the lower, first upper and second upper concrete retaining walls 7 are stacked in stages by removing the mold materials 30, 35, 41 at the stage of curing and hardening. Is formed. Then, preferably, to increase the structural strength of the entire concrete retaining wall 7, the lower concrete block 8, the first upper concrete block 8, and the second upper concrete block 8 are, for example, As shown in FIG. 16, the lengths of the concrete blocks 8 in the width direction may be shifted from each other by half, and the stacked blocks may be arranged, but the invention is not necessarily limited to this.

In the above-mentioned embodiment, the concrete block 8 is used as a form material for forming the concrete retaining wall 7 at a predetermined position on the front side of the basic concrete 29.
Is arranged in the height direction, and at a predetermined position on the rear side,
Weir 30a, 35a, 41a and this weir 30a,
Since the formwork materials 30, 35, 41 made of a support material (not shown) for supporting 35a, 41a, etc. are laid out as a scaffolding and framed on site, the place where the concrete block 8 is arranged is Further, it is possible to reduce the framing work of the formwork material, which is necessary in the conventional working method, and it is not necessary to assemble a scaffold.

However, the present invention is not necessarily limited to this. For example, as shown in FIG. 17, the lower rear concrete block 43 is arranged at a predetermined rear position on the basic concrete 29. Alternatively, the concrete 31 is poured up to a predetermined upper position L1 in the space sandwiched between the lower concrete block 43 on the rear side and the lower concrete block 8 on the lower stage. Then, as described above, the first upper-stage mold material 35 is arranged on the lower-stage mold material 30, and the second upper-stage mold material 35 is arranged on the first upper-stage mold material 35. Material 41
Similarly, the first upper concrete block 43 is arranged on the lower concrete block 43, and the first upper concrete block 4 is further arranged.
The second upper stage concrete block 43 is arranged on the third stage, and the lower side, the first upper stage side, and the second upper stage side concrete retaining walls 7 are piled up in the same process as described above.
The entire concrete retaining wall 7 can be formed.

In this case, concrete blocks 8 and 43 are arranged as a form material for forming the concrete retaining wall 7, and then the concrete blocks 8 and 43 are arranged.
By integrating the and the cast-in-place concrete G that is placed on the inner surface side thereof, the concrete retaining wall 7 can be formed on-site without assembling a formwork. Moreover,
In this embodiment, the formwork materials 32, 3 shown in FIG.
Since concrete blocks 44 and 45 are used as mold materials instead of 7, the molds required by the conventional method are completely unnecessary, and the framing work and scaffolding work of the formwork are completely eliminated. You can Incidentally, of course,
As a formwork material for forming the concrete retaining wall 7,
In addition to the concrete blocks 8, 43, the concrete blocks 15, 16, 17, 19, B, C1, C described above
A concrete block or the like having the other shape and structure of C2 and C3 may be adopted.

Further, the concrete structure of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made. For example, the side surface of the concrete retaining wall 7 as an example of the concrete structure. The shape may be a shape having a slope 7a having a front slope as shown in FIG. 18, and a retaining wall other than the gravity retaining wall,
For example, the present invention may be applied to other retaining walls such as a semi-gravity type retaining wall or a leaning type retaining wall. Further, the number of steps of the concrete retaining walls 7 to be stacked does not have to be limited to three steps, and may be, for example, one step or two steps, or may be four steps or more.

Further, the present invention may be implemented to form an inverted T-shaped concrete retaining wall 47 as shown in FIGS. 19 and 20. That is, the standing wall portion of the concrete retaining wall 47, as the form material, the inner surface 48a of the panel-like concrete block 48 shown in FIG. 21, is arranged so as to face each other, as shown in FIG. It is formed by integrating these panel-shaped concrete blocks 48 and cast-in-place concrete 49 that is placed on the inner surface side between them.

Specifically, as clearly shown in FIG.
The inner surface 48a has, for example, a plurality of (two) connecting portions 48b each having a groove having a T-shaped cross section and extending in one direction (height direction).
The panel-shaped concrete block 48 formed is used. In order to hold the inner side surfaces 48a of the panel-shaped concrete blocks 48 so as to be opposed to each other at a predetermined interval, for example, a steel material 50 having an I-shaped or H-shaped end surface shape as a spacing member is used. Is desirable. However, this spacing member and the connecting portion 4
8b is not necessarily limited to the shape and structure of the illustrated embodiment. And concrete block 48 on one side
In the groove of the connecting portion 48b of the
a is inserted, and the side portion 50b on the other side of the steel material 50 is inserted into the groove of the connecting portion 48b of the other concrete block 48 located on the opposite side, so that a pair of panel-shaped members is formed. The concrete blocks 48 can be erected with their inside surfaces 48a facing each other.

The contact area between the concrete block 48 and the cast-in-place concrete 49 that is placed on the inner surface side of the concrete block 48 is increased to increase the bonding force between the concrete block 48 and the cast-in-place concrete 49. In order to increase the size, the inner surface 48a of the concrete block 48 is provided with the rough surface portion or the uneven portion or other coupling means (for example, coupling means L, T, K shown in FIGS. 3 to 5) as described above. It is desirable that However, if the coupling force between the concrete block 48 and the cast-in-place concrete 49 is sufficiently maintained by other means or the like, the inner surface 48a is not necessarily provided with the rough surface portion or the uneven portion or other coupling means. There is no need to provide it.

In addition, each steel material 50 is connected to one side portion 50a of the steel material 50 and the other side portion 50b, and functions as an element for determining the wall thickness of the standing wall portion of the concrete retaining wall 47. Connecting pieces 50c are provided, and a gap 50d is formed between the connecting pieces 50c. When connecting a plurality of cast-in-place concrete retaining walls 47 in the width direction by passing a supporting member 51 (see FIG. 20) such as a reinforcing bar in the width direction of the concrete block 48 in the gap 50d. In addition, they can be firmly connected to each other, and the structural strength of the concrete retaining wall 47 that is cast in situ is also increased. However, in consideration of the usage method, purpose of use, structural strength, and the like of the concrete retaining wall 47 that is cast in-situ, the support member 51 is set to the gap 5
It is not necessary if it is not necessary to pass 0d.

Further, the pair of concrete blocks 4 are arranged so that the inner side surfaces 48a thereof are opposed to each other at a predetermined interval.
In the state where 8 is arranged, a distance Z1 sandwiched between the inner side surface 48a and the inner side surface 48a facing each other (see FIG. 20)
As shown in FIG. 19, the concrete block 4
It is desirable to set the length of the concrete retaining wall 47 so that it becomes longer from the top to the bottom, in order to stabilize and erect the concrete retaining wall 47. Therefore, each connecting piece 5 located between the one side portion 50a and the other side portion 50b corresponding to the distance Z1.
The length of 0c is preferably set so as to become longer from the top to the bottom of the steel material 50, whereby
The other side portion 50b of each steel material 50 stands substantially vertically,
The one side portion 50a of the steel material 50 is inclined so as to separate from the top portion to the bottom portion. Also,
To stabilize and erect the entire concrete retaining wall 47,
Each concrete retaining wall 47k, 47l, 47 described later
It is desirable that the wall thicknesses of m, 47n, and 47o be narrower toward the tip end portion, and that the wall thickness of the entire concrete retaining wall 47 be narrower toward the tip end portion. . In addition, each concrete retaining wall 47k, 47l, 4
Each of the concrete blocks 48k, 48l, 48m, 48n, 48o forming 7m, 47n, 47o has the same shape as the concrete block 48 described above, and has the connecting portion 48b on the inner surface 48a.

Then, as clearly shown in FIG. 19, one side portion 50a of the lower steel material 50k is erected on the concrete base 46 while the lower steel material 50k is erected on the concrete base 46. The block 48k is dropped from above so that it is inserted into the groove of the connecting portion 48b of 48k, and the side portion 50b on the other side of the steel material 50k on the lower side is the concrete block 48 on the lower side on the opposite side.
The block 48k is dropped from above so that the block 48k can be inserted into the groove of the connecting portion 48b. As a result, the pair of lower-stage side concrete blocks 48k are held on the concrete base 46 via the lower-stage steel material 50k at a predetermined distance. After that, by placing concrete between a pair of lower concrete blocks 48k, the lower concrete blocks 48k
And the lower-stage side cast-in-place concrete 49k are integrated, and the steel material 50 which is the spacing member is provided on the concrete base 46.
A lower-side concrete retaining wall 47k having a predetermined wall thickness defined by k is formed.

In the case of this embodiment, the height of the lower steel material 50k is the height Z2 of the concrete block 48k (see FIG. 2).
Since it is about 1.5 times higher than that of (1), the upper part of the lower steel material 50k is projected from the top of the concrete block 48k when the lower steel material 50k and the concrete block 48k are assembled. Has become. Then, in order to stack the first upper-side steel material 50l having the same height as the height Z2 of the concrete block 48k on the lower-side steel material 50k, the bottom of the first upper-stage steel material 50l and the lower-side steel material 50l are stacked. The top portion of 50k is connected by a fixing member 52 including, for example, bolts and nuts (not shown). After that, one block 50l of the first upper-stage steel material 50l and one side portion 50a of the lower-stage steel material 50k are moved upward so as to be inserted into the groove of the connecting portion 48b of the one-side first upper-stage concrete block 48l. While dropping further, the first upper steel material 50l and the lower steel material 50k
The other side 50b of the concrete block 48l is dropped from above so that the other side 50b is inserted into the groove of the connecting portion 48b of the first upper side concrete block 48l on the opposite side. The upper-stage steel material 50l and the lower-stage steel material 50k are assembled.

As a result, the pair of first upper concrete blocks 48l are connected to the lower concrete retaining walls 47k.
Above, the first upper steel material 50l and the lower steel material 50k
Are erected at a predetermined distance from each other. After that, by placing concrete between the pair of first upper-stage side concrete blocks 48l, the first upper-stage side concrete block 48l and the first upper-stage side lower-stage cast concrete 49l are integrated, and the lower stage On the side concrete retaining wall 47k, the first upper side concrete retaining wall 47l having a predetermined wall thickness is stacked and formed.

Next, on the first upper-stage steel material 50l, the second upper-stage steel material 50m having the same height as the height Z2 of the concrete block 48 is connected by the fixing member 52 as described above. In the same procedure, the second upper stage concrete block 48m, the first upper stage steel material 501, and the second upper stage steel material 50m are assembled. Then, a pair of the second upper-stage side concrete blocks 48m are placed on the first upper-stage side concrete retaining wall 47l and the first upper-stage side steel material 5
The concrete block 48m and the second upper stage of the second upper stage are placed by placing concrete between them in a state of being erected at a predetermined interval via 0l and the lower lower steel material 50k. Side concrete pouring concrete 49m is integrated with the second upper-stage side concrete retaining wall 47m having a predetermined wall thickness and the first upper-stage side concrete retaining wall 47m.
Formed by stacking on l.

Similarly, the third upper-stage steel material 50n, which is about 1.5 times the height Z2 of the concrete block 48, is connected to the second upper-stage steel material 50m by the fixing member 52. Then, in the same procedure as described above, the concrete block 48n on the third upper stage side and the steel material 50m on the second upper stage side
And the steel material 50n on the third upper stage side are assembled. And
On the concrete retaining wall 47m on the second upper stage side, a pair of third
The concrete block 48n on the upper side is placed between the second upper side steel material 50m and the third upper side steel material 50n at a predetermined distance, and concrete is placed between them. The third upper stage side concrete block 48n and the third upper stage side cast-in-place concrete 49
n is integrated and a third upper-stage side concrete retaining wall 47n having a predetermined wall thickness is stacked and formed on the second upper-stage side concrete retaining wall 47m.

In the same manner, a pair of fourth upper-stage side concrete blocks 48o are separated from the third upper-stage side concrete retaining wall 47n by a predetermined distance via the third upper-stage side steel material 50n. In this state, the concrete block 48o on the fourth upper stage side and the in-situ concrete 49o on the fourth upper stage side are integrated into one by placing concrete between them, and the concrete holding on the third upper stage side is held. On the wall 47n, a concrete retaining wall 47o on the fourth upper stage side having a predetermined wall thickness is stacked and formed.

However, in the above embodiment, the heights Z2 of the concrete blocks 48k to 48o are almost the same, and the heights of the steel material 50l on the first upper stage and the steel material 50m on the second upper stage are the same as described above. Although the height is almost the same as the height Z2, the lower steel member 50k and the third upper steel member 5
The height of 0n is set to about 1.5 times the height Z2, but the height is not limited to this.
The reason why the concrete blocks 48k to 48o are stacked in five stages and the steel materials 50k to 50n are stacked in four stages is that the two concrete blocks 48 are stacked.
k, 48l coupling position, two stacked steel materials 5
It is different from the connection position of 0k and 50l. Similarly, two concrete blocks (48l, 48m), (48
m, 48n) and (48n, 48o) are different from the steel (50l, 50m) and (50m, 50n), so that the structural strength of the concrete retaining wall 47 is maintained. Because it is done.

The method for forming the concrete retaining wall 47 is not limited to the above-mentioned forming method, but may be performed as follows. That is, the steel materials 50k to 50n are piled up in four stages in advance, and then the steel materials 50k are placed in the grooves of the connecting portion 48b of the concrete blocks 48k to 48o on one side.
Each of the concrete blocks 48k to 48o is sequentially dropped from above so that each of the concrete blocks 48k to 50n is inserted through the one side portion 50a.
The concrete blocks 48k to 48o are successively dropped from above so that the side portions 50b on the other side of the steel materials 50k to 50n are inserted into the grooves of the connecting portion 48b of 48o, respectively, and the whole is assembled. After that, concrete may be poured into the concrete blocks 48k to 48o from above the concrete blocks 48o to form the entire concrete retaining wall 47, or another forming method may be adopted. Further, the number of steps of the concrete retaining walls 47 to be stacked is not necessarily limited to 5, and for example, it may be any of 1 to 4, or 6 or more. Further, in this embodiment, an example in which the wall thickness of the concrete retaining wall 47 becomes narrower toward the tip end portion, but the wall thickness is formed to have substantially the same size from the lower end portion to the tip end portion. It may be.

In the embodiments shown in FIGS. 19 to 21, the present invention is applied to the inverted T-shaped retaining wall and its forming method, but it is applied to the L-shaped retaining wall and its forming method. It is also possible to broaden the present invention to, for example, concrete structures other than retaining walls such as bridges, and further concrete structures other than civil engineering-related, such as concrete walls of buildings, and methods of forming the same. It can be carried out.

[0065]

As is clear from the above description, according to the concrete structure, the method for forming the concrete structure, and the concrete block used for forming the concrete structure according to the present invention, , Has the following effects.

According to the concrete structure described in claim 1, a concrete block is arranged as a form material for forming the concrete structure, and the concrete block and a site to be placed on the inner surface side thereof. A concrete structure that is cast in situ is formed by integrating it with cast concrete. As a result, when arranging concrete blocks, it is possible to reduce or eliminate the framing work of the formwork, which was necessary in the conventional work method, and to provide a concrete structure with a height exceeding a predetermined length. In addition, by reducing or eliminating the work to assemble the scaffold, it is possible to reduce the burden and labor of the worker, shorten the construction period, and work with a smaller number of workers. Can be done and is economical.

According to the second aspect of the present invention, the concrete structure is formed by integrating the lower concrete block and the lower cast-in-place concrete that is placed on the inner surface of the concrete block. Formed by stacking and arranging the upper concrete structure to be formed by integrating the upper concrete block and the upper concrete cast on the inner surface of the lower concrete structure As a result, it is possible to stack the upper side concrete structure by the required height of the concrete structure, and at that time, reduce the work for assembling the scaffold, which was necessary in the conventional work method,
Or you can get rid of it.

Further, according to the method for forming a concrete structure described in claim 3, a concrete block is arranged as a form material for forming a concrete structure to be cast in situ. Since the concrete structure is formed by integrating it with the cast-in-place concrete that is placed on the inner surface side, it is possible to reduce or eliminate the work of framing the formwork, and moreover, if the height exceeds the prescribed length. Even with a concrete structure, by reducing or eliminating the work for assembling the scaffold, it is possible to reduce the burden and labor of the worker, and it is possible to shorten the construction period. It is economical because it can be done by personnel.

According to the concrete structure forming method of the fourth aspect, the lower concrete block is arranged as the form material for forming the lower concrete structure cast on site. By combining this concrete block with the lower-stage cast-in-place concrete that is placed on the inner surface side, the lower-stage concrete structure is formed, and the upper-stage concrete structure is formed on this lower-stage concrete structure. As a form material for this, the upper concrete block is placed on top of the lower concrete structure, and the upper concrete block and the upper concrete cast on the inner surface are integrated. By forming the upper concrete structure, the upper concrete structure will be It can be stacked up to that time, the conventional working methods were needed, it reduces the work for Crossed scaffold, or can be eliminated.

Further, according to the method for forming a concrete structure described in claim 5, an engaging portion is formed in the lower-stage cast-in-place concrete, and the lower-stage cast-in-place concrete is connected through the engaging portion. Since the concrete is poured so that the upper-stage side cast concrete is engaged,
Positional deviation between the lower concrete structure and the upper concrete structure is prevented.

Further, according to the method for forming a concrete structure described in claim 6, a concrete block,
In-situ concrete is connected and fixed by a fixing member to prevent displacement, so concrete block and
Positional deviation from the cast-in-place concrete is prevented.

Further, according to the method of forming a concrete structure described in claim 7, as a form material for forming a concrete structure cast in situ, the space holding members face each other at a predetermined interval. The concrete blocks that are held so as to be positioned are arranged, and these concrete blocks and the cast-in-place concrete that is placed on the inner surface side are integrated, so that a concrete structure having a predetermined wall thickness can be easily formed. be able to.

Further, according to the concrete block used for forming the concrete structure described in claim 8, the concrete block used for forming the concrete structure cast in place,
On the inner surface side of the concrete block, a rough surface portion, an uneven portion or other coupling means for strengthening the integration of the concrete block and the cast-in-place concrete to be cast is provided. The area of contact with the cast-in-place concrete is increased, and as a result, the bonding force between them is increased, and the integration between the concrete block and the cast-in-place concrete is strengthened.

Further, according to the concrete block used for forming the concrete structure according to the ninth aspect, another concrete block stacked on the concrete block is provided on the top side of the concrete block. In order to prevent displacement, a top side locking part that engages with the bottom side locking part formed on the bottom side of another concrete block is formed, so the concrete block on the lower stage and the top of that block It prevents misalignment with another concrete block that is piled up.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment in which a concrete structure according to the present invention is embodied in a concrete retaining wall.

FIG. 2 is a perspective view showing a concrete block used to form the concrete retaining wall of the embodiment.

FIG. 3 is a perspective view showing another example of the connecting means for strengthening the integration of the concrete block and the cast-in-place concrete.

FIG. 4 is a perspective view showing another example of the coupling means.

FIG. 5 is a perspective view showing still another example of the coupling means.

FIG. 6 is a cross-sectional view showing another embodiment of the concrete block.

FIG. 7 is a perspective view showing a concrete block of another embodiment.

FIG. 8 is a perspective view showing a concrete block of still another embodiment.

FIG. 9 is a perspective view showing a concrete block of still another embodiment.

FIG. 10 is a perspective view showing a concrete block of still another embodiment.

FIG. 11 is a perspective view showing a state before assembling a retaining portion and a standing wall portion of a concrete block of still another embodiment.

FIG. 12 is a cross-sectional view showing a state before assembling the retaining portion and the standing wall portion of the concrete block of still another embodiment.

FIG. 13 is a perspective view showing a concrete block of still another embodiment.

FIG. 14 is a perspective view showing a concrete block of still another embodiment.

FIG. 15 is a cross-sectional view showing a concrete block of another embodiment.

16 is a partially omitted front view of the embodiment of the concrete retaining wall shown in FIG. 1. FIG.

FIG. 17 is a sectional view showing another embodiment of the concrete structure according to the present invention.

FIG. 18 is a side view showing a modified example of the concrete structure.

FIG. 19 is a cross-sectional view showing another embodiment in which the concrete structure according to the present invention is embodied in a concrete retaining wall.

20 is an enlarged cross-sectional view taken along the line AA in FIG.

FIG. 21 is a perspective view showing a concrete block used to form the concrete retaining wall shown in FIG. 19 and a steel material as a spacing member.

[Explanation of symbols]

8, 15, 16, 17, 19, 43, 44, 45, 4
8, B, C1, C2, C3 Concrete block G, 31, 33, 36, 38, 42, 49 Cast-in-place concrete 7, 47 Concrete retaining wall (concrete structure)
14 Fixing member 11 L, T, K Coupling means 12a Top side locking part 12b Bottom side locking part 34 Concrete convex step part (engaging part) 50 Steel material (spacing member)

Claims (9)

[Claims] 1. A concrete structure to be cast on site, in which a concrete block is arranged as a form material for forming the structure, and the concrete block and the site cast to be cast on the inner surface side of the concrete block. A concrete structure formed by integrating with concrete. 2. The concrete block on the lower stage side,
By integrating the lower-stage cast-in-place concrete to be cast on the inner surface side, on the lower-stage concrete structure to be formed, the concrete block on the upper stage side,
The concrete structure according to claim 1, which is formed by stacking and arranging the upper-stage side concrete structures to be formed by integrating the upper-stage side cast-in-place concrete to be cast on the inner surface side. 3. A concrete block is arranged as a form material for forming a concrete structure to be cast in situ, and the concrete block and the cast concrete to be cast on the inner surface side are integrated. A method of forming a concrete structure according to claim 1. 4. A lower-stage concrete block is arranged as a form material for forming a lower-stage concrete structure to be cast in situ, and this concrete block and the lower-stage side cast to be cast on the inner surface side of the concrete block. The lower concrete structure is formed by integrating it with concrete, and the upper concrete is used as a form material for forming the upper concrete structure that is cast in situ on the lower concrete structure. The blocks are stacked on the lower concrete structure, and the upper concrete block and the upper concrete cast on the inner surface are integrated to form the upper concrete structure. Method for forming concrete structure. 5. An engaging portion is formed on the lower-stage cast-in-place concrete, and the concrete is poured through the engaging portion so that the lower-stage cast-in-place concrete and the upper-stage cast-in-place concrete are engaged with each other. The method for forming a concrete structure according to claim 3, which is provided. 6. The method for forming a concrete structure according to claim 3, wherein the concrete block and the cast-in-place concrete to be cast are connected and fixed by a fixing member for preventing displacement. . 7. A concrete block which is held by a spacing member so as to face each other at a predetermined interval as a form material for forming a concrete structure to be cast in situ. , A method for forming a concrete structure, which comprises forming a concrete structure by integrating it with a cast-in-place concrete that is placed on the inner surface side. 8. A concrete block used for forming a concrete structure to be cast in situ, wherein the concrete block and the cast concrete to be cast are integrated on the inner surface side of the concrete block. A concrete block used to form a concrete structure, provided with rough surfaces, irregularities or other joining means for strengthening. 9. On the top side of the concrete block, in order to prevent displacement from another concrete block stacked on the concrete block,
The concrete block used to form the concrete structure according to claim 8, wherein a top side locking portion is formed which engages with a bottom side locking portion formed on the bottom side of another concrete block. .