JPH0960004A - Concrete foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the durability and earthquake resistance of a concrete foundation by improving the sticking property of a footing part and beam members to each other. SOLUTION: A concrete block 1 is molded in such a way that parts of vertical and horizontal 3 reinforcing bars connected at right angles to each other and buried are exposed from between pedestals 4, 4 provided at the lower parts of both ends, while the ends of the horizontal reinforcing bars 3 are projected from end faces. Concrete is poured between the pedestals 4, 4 of the concrete block 1 and around the lower portion of the concrete block to mold a footing part and the concrete block 1 integrally with each other. Therefore, time footing part enters up to the bottom of the concrete block 1, is hardened including the vertical 2 and horizontal reinforcing bars exposed from between the pedestals 4, 4 of the concrete block 1, and is secured integrally with the concrete block 1 to enhance the earthquake resistance of a concrete foundation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete foundation using a concrete block which is used for foundation construction of a building and can be mass-produced in advance in a factory or the like.

[0002]

2. Description of the Related Art Conventionally, in order to construct a foundation of a building, a formwork is assembled on site, reinforcing steel is disposed in the formwork, and concrete is then poured into the formwork. It is common to perform the work after a period such as curing concrete for a long period of time.However, due to the low accuracy, work by skilled workers is required, and there are problems such as high labor costs due to the long construction period. Was. Therefore, a construction method is adopted in which a concrete block with an inverted T-shaped vertical cross section or an L-shaped concrete block is molded in advance at a factory, etc., and is installed on the construction floor, in the same way as the shape of a block that is assembled by a formwork. However, since the concrete block itself is large and heavy, it is difficult to handle and difficult to transport.

In order to solve such a problem, for example,
The technique disclosed in Japanese Patent Application Laid-Open No. 2-308010 is proposed. This is because the pre-cast concrete beam member is horizontally floated and retained above the existing mesh-shaped rebar on the construction floor, and the precast concrete beam member is horizontally floated and retained above the mesh-shaped reinforcing bar, and it is projected from the lower end surface of the beam member and The loop-shaped protruding reinforcing bar that opens in the orthogonal direction is crossed with the mesh-shaped reinforcing bar, and the insertion reinforcing bar extending in the orthogonal direction of the beam member is inserted into the loop-shaped protruding reinforcing bar and fixed to the mesh-shaped reinforcing bar, and the mesh-shaped reinforcing bar and the protruding It is a concrete foundation in which a footing portion is formed by driving concrete or mortar from the construction floor to the lower part of the beam member so as to bury the reinforcing bars.

[0004]

The above-mentioned technique forms a concrete block in advance in a factory or the like and forms only the footing portion on site, so that the hardening time of concrete is short and the construction period can be shortened. Since it was possible and only the beam member was formed in advance, handling such as transportation was easy.

However, since a spacer or the like is used to horizontally hold the concrete block above the mesh-shaped reinforcing bar, it takes time to perform the work, and since this work requires a lot of skilled personnel, it is inefficient and costly. There was a problem that the cost became high.

Further, since there are problems such as poor adhesion between the footing portion and the beam member and poor durability and earthquake resistance, these problems are solved and a stubborn foundation that can withstand a large earthquake The development of construction technology was strongly desired.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and its object is to easily handle such as transportation, so that even an unskilled person can easily perform the work, and It is to provide a concrete foundation structure which is excellent in durability and earthquake resistance and can be constructed at low cost in a short period of time.

[0008]

In order to achieve the above-mentioned object, the present invention exposes a part of a vertical reinforcing bar and a horizontal reinforcing bar connected and embedded in a lattice shape from between legs provided at lower ends of both ends, and A concrete block is molded by projecting the end of the horizontal reinforcing bar from the end surface, and concrete is placed between the legs of the concrete block and around the lower part to integrally form the footing and the concrete block. As a result, the footing part penetrates to the bottom of the concrete block and hardens, including the vertical and horizontal rebars exposed between the legs of the concrete block, and is firmly fixed to the concrete block, making the concrete foundation earthquake-resistant. Improve.

Further, a part of the vertical reinforcing bars and the horizontal reinforcing bars which are connected and embedded in a lattice shape is exposed from between the leg portions provided at the lower ends of both ends, and both ends of the horizontal reinforcing bars are projected from the end faces. Multiple concrete blocks are installed on the construction floor, a curtain plate is installed covering these concrete blocks, and concrete is placed in the space between the concrete blocks to firmly fix the concrete blocks together. Further, since the footing portion and the concrete block are integrally molded by placing concrete between the legs of the plurality of concrete blocks and around the lower portions, a step of placing concrete between the concrete blocks, and a footing The step of forming the portion can be performed simultaneously.

Further, since the cuts are formed in the transverse direction at appropriate portions of the curtain plate so as to be bendable at appropriate portions of the curtain plate, one kind of curtain plate can cope with connecting portions at any angle. it can.

The vertical reinforcing bars exposed from between the legs of the concrete block are bent at the right angle at the lower end,
Since the tip part of the lower end has a length that protrudes from the longitudinal side surface of the concrete block, bend the lower end of the vertical reinforcing bar and embed it in the footing part to increase the strength of the footing part and at the same time, to the concrete block and footing part. Improves adhesion to the parts.

Further, a T-shaped joint member having a fitting inlet at one end is fixed to the horizontal reinforcing bar, and the fitting inlet is exposed on the longitudinal side surface and embedded in a concrete block.
Since the horizontal rebar projecting from the end face of the concrete block is fitted into the fitting port to connect the concrete blocks in a substantially T shape, the concrete blocks can be easily connected in a substantially T shape.

Since the concave portions are formed on the end faces of the concrete blocks from which the horizontal reinforcing bars are projected, the adhesion between the concrete blocks is improved, and the deviation between the concrete blocks and the cast concrete is improved. Can be prevented.

Further, since a plurality of reinforcing reinforcing bars are fixed to the horizontal reinforcing bars exposed from the leg portions of the concrete block, the reinforcing reinforcing bars are embedded in the footing portion to enhance the strength of the footing portion and to prevent the concrete block from being Improves the adhesion with the footing.

Further, since concrete blocks having different lengths in the longitudinal direction are appropriately used, they can be used for foundation construction of any building.

[0016]

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic plan view showing the construction process of the entire concrete foundation of the present invention, FIG. 2 is a partial perspective view showing the mounting state of the curtain plate in the above embodiment, and FIG. 3 is a mounting state of the concrete block in the above embodiment. FIG. 4 is a sectional view showing an example of the concrete foundation structure of the present invention, FIG. 5 is a front view showing an example of the concrete block of the present invention, and FIG. 6 is another example of the concrete block of the present invention. FIG. 7 is a front view showing an embodiment, FIG. 7 is a perspective view showing a joint member used for connecting concrete books of the present invention, and FIG. 8 is a front view showing an embodiment of a curtain board used for concrete foundation construction of the present invention. FIG. 10 is a perspective view showing a modified example of the curtain plate of FIG.

In the figure, 1 is a concrete block preformed in a factory, 2 is a vertical reinforcing bar, 3 is a horizontal reinforcing bar, and the vertical reinforcing bar 2 and the horizontal reinforcing bar 3 are fixed in a lattice shape and embedded in the concrete block 1. It Further, 5 is a footing portion of a concrete foundation integrally fixedly molded to the lower portion of the concrete block 1, and 6 is a top curtain plate,
Reference numeral 7 denotes a lower curtain plate, and the upper curtain plate 6 and the lower curtain plate 7 form a curtain plate. Further, 8 is a joint member, 9 is a separator, 10 is a temporary fixing member, 11 is an anchor bolt, 12 is a construction surface, and 13 is a basic ground height (G.
L. ).

The concrete block 1 has a substantially rectangular parallelepiped shape consisting of long side surfaces 1a and 1a which are upright parallel to the long side of the bottom surface and end surfaces 1b and 1b which are upright parallel to the short side. Further, a plurality of vertical reinforcing bars 2 (five in the figure) and a plurality of horizontal reinforcing bars 3 (four in the figure) are embedded in the concrete block 1. Then, as shown in FIG. 5, the vertical reinforcing bars 2 and the horizontal reinforcing bars 3 are preliminarily fixed in a grid shape in a state where the upper end of the vertical reinforcing bar 2 is bent in a U shape and scratched by the uppermost horizontal reinforcing bar 3. ,
Further, as shown in FIG. 5 and the like, the ends of the horizontal reinforcing bars 3 are projected from the end faces 1b, 1b of the concrete block 1.

Further, by cutting out the center of the bottom of the long side surface 1a of the concrete block 1 into a trapezoidal shape, legs 4 are formed at the lower ends of both ends of the concrete block 1, and the concrete block 1 is provided between these legs 4, 4. Part of the buried vertical rebar 2 and horizontal rebar 3 is exposed.

Furthermore, the end face 1 of the concrete block 1
A trapezoidal concave portion 1c is formed in b, so that the adhesiveness to concrete cast between the concrete blocks 1 is improved and deviation due to vibration can be prevented. The anchor bolts 11 projecting from the upper surface of the concrete block 1 are used when fixing the base of a building or the like.

As shown in FIG. 6, when the vertical reinforcing bar 2 is bent, a reinforcing bar having a length whose lower end tip portion protrudes from the longitudinal side surface 1a of the concrete block 1 is used for the vertical reinforcing bar 2. Then, in the footing part 5, the vertical rebar 2
It is possible to embed the tip portion of the concrete to increase the strength of the footing portion 5 and to improve the adhesiveness to the concrete block 1 to improve the earthquake resistance of the concrete foundation, and also to use it as a block fence.

As shown in FIGS. 1 and 2, the upper curtain plate 6 has three upright faces, and the left and right faces are integrally formed by opening the left and right faces by 135 degrees with respect to the central face. Upper curtain plate 6a,
There are a corner upper outer curtain plate 6b integrally formed by opening two upright surfaces at right angles, and a flat plate-shaped upper curtain plate 6c, which are used properly depending on where the concrete block 1 is connected. Further, each upright surface of the upper curtain plate 6 is provided with a connection hole 16 into which the separator 9 is inserted at an appropriate position. Then, the upper curtain plate 6 is attached to the concrete block 1 by using the separator 9 and the temporary fixing member 10. Although thin iron plates are used for these curtain plates, an iron plate made of aluminum or a plate made of synthetic resin may be used as appropriate.

As shown in FIG. 8, the lower curtain plate 7 is thin and has a plurality of cuts 7a formed in the upper portion in the lateral direction, and a connecting hole 17 for inserting the separator 9 is provided at an appropriate position. There are multiple. Then, as shown in FIGS. 9 and 10, by bending along the notch 7a, the corner inner side upper curtain plate 6a and the corner outer side upper curtain plate 6b can be deformed in the same shape. .

Further, a locking member 7b is provided at the end of the lower curtain plate 7.
The lower curtain plate 7 can be attached to the concrete block 1 by connecting the locking member 7b to the vertical reinforcing bar 2 or the horizontal reinforcing bar 3 exposed between the legs 4 and 4 of the concrete block 1. it can. Since the lower curtain plate 7 is pressed against the concrete block 1 by the concrete cast to form the footing portion 5 around the lower curtain plate 7, the connecting hole 17 may not be provided. Further, since the lower curtain plate 6a is embedded in the footing portion 5, it is preferable to use a synthetic resin plate having good corrosion resistance.

The joint member 8 is, as shown in FIG.
An engaging portion 8c having a fitting opening 8b is projected from the central portion of the semi-cylindrical fixing portion 8a to form a T shape, and the fixing portion 8a is fixed to the horizontal reinforcing bar 2 located in the central portion of the concrete block 1. And is embedded in the concrete block 1 such that the fitting inlet 8b is exposed from the long side surface 1a of the concrete block 1.

Next, a concrete foundation construction process will be described. First, the construction surface 1 for constructing a concrete foundation by leveling, tensioning, flooring, quarrying, rolling compaction, leveling, etc.
Build 2. Then, according to the construction drawing, the concrete block 1 is placed on the construction surface 12, and the mold 14 is installed around the concrete block 1.

Next, at the concrete fixing points between the plurality of installed concrete blocks 1, the horizontal reinforcing bars 3 projecting from the end face 1b of each concrete block 1
Are fixed by wire binding or welding. In addition, when connecting the concrete blocks 1 and 1 in a substantially T-shape, the concrete block 1 is projected from the end face 1b of the other concrete block 1 into the fitting inlet of the joint member 8 exposed from the longitudinal side face 1a. Horizontal rebar 3
You may make it insert and fix.

The upper area (area above the upper surface of the footing portion 5) between the plurality of concrete blocks 1 is covered with the upper curtain plate 6, and the lower area (area below the upper surface of the footing portion 5) is covered with the lower curtain plate. Cover with 7. Here, in FIG.
As shown in FIG. 2, the upper curtain plate 6 is fixed to the concrete block 1 by a separator 9 or a U-shaped temporary fixing member 10. Further, the lower curtain plate 7 connects and fixes the locking member 7b provided at the end to the vertical rebar 2 or the horizontal rebar 3 exposed between the legs 4 and 4 of the concrete block 1, and further the separator 9 is attached. It can also be used and firmly fixed. In addition, the footing part 5 is provided around the lower curtain plate 7.
Since the concrete that forms the
If it is fixed to the concrete block 1 using b, the lower curtain plate 7 will not come off.

Next, in order to form the footing portion 5, concrete is cast around the concrete block 1 surrounded by the mold 14 and further covered with the upper curtain plate 6 and the lower curtain plate 7. By casting concrete between the plurality of concrete blocks 1, the footing portion 5 and the concrete blocks 1 are integrally fixed, and the concrete blocks 1 are fixed to each other to integrally form a concrete foundation.

As shown in FIG. 4, a plurality of reinforcing reinforcing bars 21 are orthogonally fixed to the horizontal reinforcing bars 3 exposed between the legs 4 and 4 of the concrete block 1, and further, these reinforcing reinforcing bars 21 are provided. By fixing the plurality of reinforcing reinforcing bars 22 orthogonally to each other, it is possible to embed the reinforcing reinforcing bars 21 and 22 fixed in the lattice shape in the footing portion 5.

After the concrete between the concrete blocks 1 covered with the upper curtain plate 6 is hardened, the separator 9 or the temporary fixing member 10 is removed and the upper curtain plate 6 is reused.

As described above, since the concrete block 1 that is preformed is used in the portion where the foundation of the building is installed, it does not waste time until the ready-mixed concrete hardens, and the construction period can be shortened. it can. Further, since the upper curtain plate 6 is detachable and the uniformly formed lower curtain plate 7 is used, the cost can be reduced.

[0033]

As described in detail above, the present invention provides
Since concrete blocks and curtain boards can be uniformly molded, handling such as transportation is easy, cost can be significantly reduced, and the construction method is easy to manual, so anyone can easily construct concrete foundations. Can be done,
The construction period can also be shortened.

Since the concrete block and the footing are firmly fixed to each other, the strength of the concrete foundation is the same as that of the conventional method in which the entire concrete foundation is molded by the formwork.
It is possible to provide a concrete foundation having excellent durability and earthquake resistance at low cost.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a construction process of an entire concrete foundation of the present invention.

FIG. 2 is a partial perspective view showing a mounting state of the curtain plate in the embodiment.

FIG. 3 is a cross-sectional view showing a placed state of the concrete block in the above-mentioned embodiment.

FIG. 4 is a sectional view showing an embodiment of the concrete foundation structure of the present invention.

FIG. 5 is a front view showing an embodiment of the concrete block of the present invention.

FIG. 6 is a front view showing another embodiment of the concrete block of the present invention.

FIG. 7 is a perspective view showing a joint member used for connecting concrete books of the present invention.

FIG. 8 is a front view showing an example of the curtain plate used for the concrete foundation construction of the present invention.

9 is a perspective view showing a modified example of the curtain plate of FIG.

FIG. 10 is a perspective view showing another modification of the curtain plate of FIG.

[Explanation of symbols]

 1 Concrete Block 1a Longitudinal Side 1b End Face 1c Recess 2 Vertical Reinforcing Bar 3 Horizontal Reinforcing Bar 4 Leg 5 Footing Part 6 Upper Curtain Plate (Makuban) 7 Lower Curtain (Makuban) 8 Joint Member 8b Fitting Hole 21 Reinforcing Reinforcing Bar 22 Reinforcing Reinforcing Bar

Claims (8)

[Claims] 1. A concrete block in which a part of a vertical reinforcing bar and a horizontal reinforcing bar which are connected and embedded in a grid pattern are exposed from between legs provided at lower ends of both ends and an end of the horizontal reinforcing bar is projected from an end face. The concrete foundation is characterized in that the footing portion and the concrete block are integrally formed by casting concrete between the legs of the concrete block and around the lower portion of the concrete block. 2. A vertical reinforcing bar and a horizontal reinforcing bar, which are connected and embedded in a grid pattern, are partially exposed so as to be exposed from between legs provided at the lower ends of both ends, and both ends of the horizontal reinforcing bar are projected from the end faces. Multiple concrete blocks are installed on the construction floor, a curtain plate is installed covering these concrete blocks, and concrete is placed in the space between the concrete blocks to firmly fix the concrete blocks together. Further, a concrete foundation is characterized in that concrete is cast between the leg portions of the plurality of concrete blocks and around the lower portions to integrally form the footing portion and the concrete block. 3. The concrete foundation according to claim 2, wherein a bend is formed at an appropriate portion of the curtain plate, and a notch in a lateral direction is formed at an appropriate portion of the curtain plate. 4. The vertical reinforcing bar exposed from between the legs of the concrete block has a length such that, when the lower end is bent at a right angle, the tip portion of the lower end projects to the longitudinal side face of the concrete block. The concrete foundation according to any one of items 1 to 3. 5. A T-shaped joint member having a fitting inlet at one end is fixed to a horizontal rebar and is embedded in a concrete block with the fitting inlet being exposed at a longitudinal side surface and protruding from an end surface of the concrete block. The concrete foundation according to any one of claims 1 to 4, wherein a reinforcing bar is fitted into the fitting inlet to connect the concrete blocks in a substantially T-shape. 6. The concrete foundation according to claim 1, wherein a concave portion is formed in an end surface of the concrete block from which the horizontal reinforcing bar is projected. 7. The concrete foundation according to claim 1, wherein a plurality of reinforcing reinforcing bars are fixed to the horizontal reinforcing bars exposed from between the legs of the concrete block. 8. The concrete foundation according to claim 1, which is formed by appropriately using concrete blocks having different lengths in a longitudinal direction.