JPH0421929Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a concrete block, and particularly to a concrete block capable of transmitting in-plane shearing force.

Prior Art The shape of the block of the conventional reinforced concrete block structure was a simple rectangular parallelepiped block with a hollow section, etc. provided therein. To describe its shape more specifically, the concrete block consists of a pair of face shells spaced apart from each other and joined together by a plurality of web shells located between the face shells, and a pair of face shells and a plurality of web shells. The cavity is the space surrounded by
The pair of face shells are quadrangular (for example, rectangular) of the same size.

Problems to be solved by the invention In the conventional reinforced concrete block structure, for example, as shown in Fig. 10, a large number of blocks B are installed on a concrete foundation CB, and each block B has horizontal and vertical eyes. Pass vertical bars through the grooves or cavities, fill these grooves or cavities with concrete or mortar as a joint material, fill the space between the top and bottom surfaces of each block with concrete or mortar as a joint material, and form the desired block. A block wall is constructed by passing horizontal stripes between the upper and lower surfaces of the rows, and this block wall is used as a load-bearing wall or a curtain wall.

The most important requirements for using this block wall as a load-bearing wall are vertical compressive strength and horizontal shear strength during earthquakes.

For example, when a horizontal shearing force F acts on a wall of the reinforced concrete block structure, an in-plane shearing force P (shearing force parallel to the wall surface) acts diagonally on the wall. Since this wall is made up of a large number of concrete blocks B, a horizontal component Q and a vertical component R of the shear force P are applied to the horizontal and vertical joint surfaces of each block B. act.

The shear strength of the joint surfaces of each block is determined by the dowel effect of the concrete or mortar used as the joint material filled in the left and right (and top and bottom) joint grooves of each block and the cavity of each block, and the reinforcing steel inserted into the joint groove and cavity. It is determined by the tensile strength of (vertical and horizontal bars). The shear strength of this joint surface is much smaller than the shear strength of the concrete block itself. Therefore, if a large horizontal shearing force F acts on the concrete block wall, and a shearing force (Q or R) greater than the shear strength acts on each joint surface of the individual blocks, the joints will break down before the concrete block itself is destroyed. The surfaces are destroyed, slippage occurs at the joint surfaces, and the individual blocks that make up the concrete block wall are no longer able to transmit in-plane shear forces.

For this reason, construction methods using reinforced concrete block structures lack reliability in terms of structural strength, and the scale and design strength of structures that can be constructed are strictly regulated by laws and regulations. Furthermore, for the same reason, block walls installed later in a reinforced concrete frame can only be treated as mere curtain walls. However, the proof strength of the concrete block itself is considerably greater than the proof stress regulated by laws and regulations, so there is sufficient margin for the proof strength of the block itself.

The problem that this invention aims to solve is to provide a concrete block that can bring the strength of the wall due to the reinforced concrete block structure closer to the strength of the concrete block itself. The objective is to provide a concrete block capable of transmitting force.

Means for Solving the Problems The structure of this invention is such that in a concrete block in which a pair of face shells with an appropriate interval are joined together by a web shell located between the face shells, the shape of the face shell on one side is is a rectangular shape with a predetermined thickness, each corner of which is cut out at a predetermined angle to form an octagon; the face shell on the other side has a rectangular shape with a predetermined thickness; The length of each side of the quadrangle of the side face shell is the same as the length of each side after cutting out each corner of the square face shell of one side.

In this concrete block, each side of the square of the face shell on the other side is parallel to each side of the corresponding square of the face shell on one side, and the four sides of the face shell on the other side are The center of the square and the center of the square of the face shell on one side are located on the same line.

In addition, a rectangle or a square is used as the quadrilateral of the face shell on one side, and the angle when cutting out each corner is such that the sides formed after cutting are
It is desirable that the angle be approximately perpendicular to the diagonal line of the wall when the blocks are stacked together to form a wall. To do this, choose an angle such as 45° or 30° depending on the shape of the block.

By providing a plurality of web shells and forming at least one cavity surrounded by a plurality of web shells and a pair of face shells, the block can be made lightweight, and reinforcing bars can be passed through this cavity. It can be filled with joint material.

The methods of forming joint grooves for making joints and vertical lines on the left and right end faces of the block, and forming grooves for making joints and horizontal lines on the upper (or lower) end faces of the block are the same as for conventional concrete blocks. It is.

The concrete blocks of this invention are manufactured using the same manufacturing method as conventional concrete blocks.

Embodiment 1 A first embodiment of the invention of this application will be explained using FIGS. 1 to 6.

The concrete block B ₁ includes a face shell 10 on one side (rear side in FIG. 1), a face shell 20 on the other side (front side in FIG. 1), and a web shell 31a that integrally connects both face shells 10, 20. , 31b.

The face shell 10 on one side has each corner of a square with a thickness t ₁ cut out at an angle θ=45°, and has an upper surface 11, a lower surface 12, a left surface 13, and a right surface 14. , an octagonal shell consisting of an upper left slope 15, a lower left slope 16, a lower right slope 17, and an upper right slope 18.

The other side face shell 20 has an upper surface 21
It consists of a square with a thickness t ₂ consisting of a lower surface 22, a left surface 23, and a right surface 24, and each surface 2
The lengths L of 1, 22, 23, and 24 are configured to be the same as the lengths of the respective surfaces 11, 12, 13, and 14 of the face shell 10. Note that it is better that the thickness t ₁ and the thickness t ₂ be the same size.

The web shells 31a and 31b are located between the face shell 10 on one side and the face shell 20 on the other side, which are arranged at a predetermined interval, and a cavity 33 is formed between the web shell 31a and the web shell 31b. and surface 11 and surface 2
1, the distance between surfaces 12 and 22, the distance between surfaces 13 and 23, and the distance between surfaces 14 and 24. do.

Then, joint grooves 34 and 35 are formed on the outside (left side or right side) of the web shells 31a and 31b between the respective face shells 10 and 20 to insert joints and vertical lines. The halves 36 and 37 of the web shells 31a and 31b on the face shell 10 side have the same vertical dimensions as the face shell 10, and the halves 38 and 39 of the web shells 31a and 31b on the face shell 20 side have the same dimensions as the face shell 20. It is configured to have a dimension in the vertical direction.

In addition, if it is necessary to pass a horizontal line when stacking blocks, a joint groove 40 for inserting a joint or a horizontal line is formed on the upper (or lower) side of the web shells 31a, 31b, as shown in FIG.

In order to construct a block wall using this concrete block B ₁ ,
In addition to B ₁ , concrete block B ₂ , concrete block B ₃ , etc. are required.

The concrete block _B2 is constructed in a shape in which the lower part of the concrete block _B1 shown in FIG. 1, which is defined by the line connecting a and b, is removed.

Concrete block _B3 is constructed in the shape of concrete block _B1 shown in FIG. 1 by removing the part below the line connecting a and b and the part to the left of the line connecting c and d.

Other necessary concrete blocks are also
It can be easily created by configuring the concrete block _B1 shown in the figure into a shape in which appropriate parts are removed.

Next, how to use the concrete block of the first embodiment of this invention will be explained.

Place concrete or mortar joint material on the concrete foundation CB. Then, place the concrete block B ₃ (A) on this joint material with the face shell 20 facing forward, and place the concrete block (B) on the right side of the concrete block B ₃ (A).
Install B ₂ so that its face shell 10 is on the front side, and place block B ₃ 's face shell 2
The surface 24 of the face shell 10 of the block B ₂ of B is in contact with the surface 24 of the face shell 10 of block B ₂ of B, and the surface 14 of the face shell 10 of block B 3 of B is in contact with the surface 24 of the face shell 20 of block B ₂ of B. Do it like this.

Place concrete block B ₂ on the right side of block B ₂ with its face shell ₂₀ facing forward, and place the face 13 of the face shell 10 of block B ₂ on the face shell 20 of block B 2. contact with the surface 23 of the block
The surface 23 of the face shell 20 of block _B2 is brought into contact with the surface 13 of the face shell 10 of block _B2 .

Place the second concrete block _B2 on the right side of the first block _B2 with its face shell 10 facing forward. Blocks with relationships between each side
Since it is the same as the arrangement of _B2 , its explanation will be omitted.

Next, place concrete or mortar as joint material on top of block _B2 of A, B, C, and D. Place the concrete block _B1 (E ₎ on top of the joint material on the block B2 (B) with the face shell 20 facing forward. And block B ₁
Block face 22 of face shell 20.
Place the surface 12 of the face shell 10 of block B ₁ on top of _{the surface 21 of the face shell 20 of block B 2 ,} and place the surface 12 of the face shell 10 of block B Position the _slope 16 of the face shell 10 of block B ₁ on the slope 18 of the face shell 10 of block B 3,
Block B ₁ Slope 1 of face shell 10
7 is positioned above the slope 15 of the face shell 10 of block _B2 .

Next, place concrete block B ₁ of F on top of the joint material on block B ₂ of F, face shell 1.
Install with 0 facing forward. Place the surface 12 of the face shell 10 of block B ₁ on the surface 21 of the face shell 20 of block B ₂ , and place the surface 22 of the face shell 20 of block B ₁ on top of the surface 21 of the face shell 20 of block B ₂ . Face 11 of Face Ciel 10
The surface 14 of the face shell 10 of the block B ₁ is brought into contact with the surface 24 of the face shell 20 of the block B ₁ of the
Bringing the surface 24 of the face shell 20 of block B ₁ into contact with the surface 14 of the face shell 10 of block B ₁ ,
Slope 1 of face shell 10 of block B ₁
7 is brought into contact with the slope 15 of the face shell ₁₀ of the second block B1, and the slope 16 of the face shell 10 of the _second block B1 is brought into contact with the slope 18 of the face shell 10 of the second block _B2 .

Next, place the third concrete block B ₁ on top of the joint material on the second block B ₂ .
Install with 0 facing forward. Since the relationship between each surface is the same as in the case of the arrangement of block _B1 , the explanation thereof will be omitted.

Furthermore, on top of block B ₁ of E, H and G,
Construct a block wall by stacking several rows of concrete blocks _B1 . concrete block
The way to stack B ₁ is to stack E, F, and G blocks.
Since this is the same as the method of stacking _B1 , the explanation thereof will be omitted. When stacking each block B ₁ , B ₂ , B ₃ , a joint material may or may not be interposed between the joint surfaces other than the joint grooves.

In the block wall made of concrete blocks of the first embodiment, the slopes 15, 16, 17, and 18 of the face shells 10 of the blocks _B1 , _B2 , and _B3 are in contact with each other (or are in contact with each other through joint material). ). Therefore, even if an in-plane shearing force P in a diagonal direction acts on the block wall, each slope 15, 16, 17, 18 is substantially perpendicular to the direction of the shearing force, so that each block
The shearing force can be transmitted without slipping at the joint surfaces of B ₁ , B ₂ , and B ₃ . Therefore, it is possible to construct a concrete block wall that can exhibit the strength of the concrete block itself.

Embodiment 2 A second embodiment of the invention of this application will be explained using FIGS. 7 to 9.

The concrete block of the second embodiment has a face shell 10 on one side (rear side in FIG. 7), a face shell 20 on the other side (front side in FIG. 7),
Web shells 31a, 31b, 31c, 31d, 3 that connect both face shells 10, 20 together
1e.

The face shell 10 on one side has each corner of a rectangle with a thickness t ₁ cut out at an angle θ=30°, and has an upper surface 11, a lower surface 12, a left surface 13, and a right surface 14. , an octagonal shell consisting of an upper left slope 15, a lower left slope 16, a lower right slope 17, and an upper right slope 18.

The other side face shell 20 has an upper surface 21
It consists of a rectangle with a thickness t ₂ consisting of a lower surface 22, a left surface 23, and a right surface 24, and each surface 2
Length L ₁ of 1, 22 and length of each surface 23, 24
_L2 is configured to be the same as the length of each surface 11, 12 and the length of each surface 13, 14 of face shell 10. Note that it is better that the thickness t ₁ and the thickness t ₂ be the same size.

Web shell 31a, 31b, 31c, 31
d and 31e are located between the face shell 10 on one side and the face shell 20 on the other side, which are arranged at a predetermined interval, and each space surrounded by each face shell and each web shell is a hollow part 33a,
33b, 33c, 33d, and
Each web shell 31a, 31b, 31c, 3
1d and 31e are coupled to each face shell 10 and 20.

Then, joint grooves 34, 35 are formed on the outside (left side or right side) of the web shells 31a, 31e between the face shells 10, 20 to insert joints or vertical lines. Each web shell 31a, 31b, 31
Half 36, 37 of face shell 10 side of face shell 10 of c, 31d, 31e have the same vertical dimension as face shell 10, and each web shell 31a, 31
Face shell 2 of b, 31c, 31d, 31e
The zero-side halves 38 and 39 are configured to have the same vertical dimensions as the face shell 20.

In addition, if it is necessary to pass horizontal stripes when stacking blocks, each web shell 31a, 31b, 31c, 3
It is preferable to form a joint groove or a horizontal groove on the upper side (or lower side) of 1d and 31e.

Since the method of using the concrete block of this second embodiment is the same as that of the first embodiment, the explanation thereof will be omitted.

In the second embodiment, each corner of the rectangle is cut out at an angle θ=30°;
, the distance between surface 13 and surface 23 (and surface 1
4 and the surface 24) is smaller than the distance between the surfaces 11 and 21 (and the distance between the surfaces 12 and 22). Therefore, by setting the notch angle θ to 45°, the above drawback can be eliminated. In a rectangular parallelepiped block like the second embodiment, even if the cutout angle θ is 45°, there will be no particular difference in operation and effect.

Effects of the invention The concrete block of this invention has a concrete block in which a pair of face shells of a predetermined thickness, spaced apart from each other, are integrally connected by a web shell located between the face shells. The shape of 4 has a predetermined thickness.
Each corner of the square is cut out at a predetermined angle to form an octagon, and the shape of the face shell on the other side is the length of each side after each corner of the quadrilateral is cut out. It is a concrete block that is in the shape of a quadrilateral with four sides of the same length as the concrete block, and when the concrete blocks are piled up to form a block wall, each corner of the quadrilateral of the face shell on one side is set at a predetermined angle. Since the slopes formed by the notches are arranged so as to join each other, even if in-plane shear force (in-plane shear force acting in the diagonal direction of the wall) acts on this block wall, Since each slope is substantially orthogonal to the direction of the shearing force, the shearing force can be transmitted without slipping on the joint surfaces of the blocks. Therefore,
This has the effect of making it possible to construct a concrete block wall that can fully demonstrate the strength of the concrete block itself.

[Brief explanation of the drawing]

Figures 1 to 10 are for explaining the invention of this application, and Figures 1 to 6 show concrete blocks of the first embodiment of the invention of this application. 2 is a plan view, 3 is a side view, 4 is a perspective view, 5 is a perspective view showing how the blocks are stacked, and 6 is a part of the first embodiment. 7 is a side view showing a replaced concrete block, and FIGS. 7 to 9 show the concrete block of the second embodiment; FIG.
8 is a front view, FIG. 8 is a plan view, FIG. 9 is a side view, and FIG. 10 is a front view of a block wall stacked with conventional concrete blocks. In the figure, 10 is one face shell, 15, 1
6, 17 and 18 are slopes, 20 is the face shell on the other side, 31a, 31b, 31c, 31d and 31e are web shells, 33, 33a, 33
b, 33c and 33d are hollow parts, and 34, 35 and 40 are joint grooves.

Claims (1)

[Scope of utility model registration request] In a concrete block in which a pair of face shells spaced apart from each other are integrally joined by a web shell located between the face shells, the face shell on one side has a shape of 4 mm with a predetermined thickness.
Each corner of the rectangle is cut out at a predetermined angle to form an octagon, and the face shell on the other side has a rectangular shape with a predetermined thickness. A concrete block characterized in that the length of each side of the square is the same as the length of each side after cutting out each corner of the quadrangle of the face shell on one side.