JP6974085B2 - Reinforcing unit, joint structure between foundation and soil and its manufacturing method - Google Patents

Description

The present invention is a reinforcing bar unit, which is a reinforcing bar unit composed of reinforcing bars that are previously inserted into the concrete portion to be manufactured earlier in order to join another concrete portion to the concrete portion manufactured earlier. The present invention relates to the joint structure between the foundation and the soil using the above and the method for producing the same.

Patent Document 1 describes a support structure for soil concrete placed on the upper part of the backfilled soil that has been backfilled on the inner side surrounded by an inverted T-shaped cloth foundation consisting of a rising portion and a base portion. Disclosed is a soil concrete support structure in which a support for supporting soil concrete is arranged with a base portion of the cloth foundation as a support portion.

Japanese Unexamined Patent Publication No. 2010-95920

However, the technique disclosed in Patent Document 1 does not have a structure in which a bar is provided in advance on the base portion of the cloth foundation. On the other hand, if the reinforcing bars are erected in advance on the base of the cloth foundation, it is necessary to bend the reinforcing bars to the soil concrete side at the site after the cloth foundation is hardened, which may increase the work load. ..

In view of the above circumstances, it is an object of the present invention to provide a reinforcing bar unit, a joint structure between a foundation and soil, and a method for manufacturing the same, which can omit bending work of the reinforcing bar in the field.

In order to solve the above-mentioned problems, the reinforcing bar unit of the present invention includes a reinforcing bar that is previously inserted into the first concrete portion in order to join the second concrete portion to the first concrete portion later. And
The bar is a buried portion buried in the first concrete portion, a rising portion that rises from one end side of the buried portion and the upper side protrudes upward from the first concrete portion, and the upper side of the rising portion. It has an insertion portion extending laterally, is arranged in plurality at predetermined intervals, and is characterized in that it is connected to each other by connecting bars extending in the direction of this arrangement.

With the above configuration, the insert bar has a structure in which a lateral insertion portion is provided in advance in the upper part of the rising portion, so that bending work of the insert bar at the site can be omitted. It is possible to improve the efficiency and speed of the work when manufacturing the concrete portion of 2.

Two or more of the above connecting bars may be provided. According to this, it is possible to firmly fix the plurality of reinforcing bars to each other and to increase the strength of fixing to concrete.

The connecting bar is located near the boundary between the buried portion and the rising portion, near the boundary between the rising portion and the insertion portion, the other end side of the buried portion, and the insertion portion. It may be provided at two or more places on the tip side of the above.

A top surface defining member that defines the height of the top surface of the first concrete portion may be provided. This makes it possible to save the labor of manually leveling the upper surface of the first concrete portion.

The upper surface defining member may be provided with a flexible portion at a position where the plate of the formwork for molding the concrete portion in the vicinity of the first concrete portion can come into contact. According to this, even if the plate of the formwork for molding the concrete portion in the vicinity of the first concrete portion is peeled off after the concrete portion in the vicinity is cured, even if the plate hits the flexible portion, the flexibility causes an obstacle. The above board can be peeled off without any.

Further, in the joint structure between the foundation and the soil of the present invention, the reinforcing bar unit is used, the first concrete portion is used as the base portion of the cloth foundation, the buried portion is embedded in the base portion, and the rising portion is used. The upper portion is projected from the base portion, the second concrete portion is made of soil concrete, and the upper side of the rising portion and the insertion portion are present in the soil concrete.

With the above configuration, even if the insert bar is placed in advance on the base of the cloth foundation, the upper part of the rising part of the insert bar is located sideways to form the insertion part, so that it can be used as an insertion part at the site. It is possible to omit the bending work of the insert bar.

Further, the method for producing the joint structure between the foundation and the soil of the present invention is a method for producing the joint structure between the foundation and the soil, the above-mentioned reinforcing bar unit and the formwork plate forming the rising portion in the above-mentioned cloth foundation. The upper surface defining member provided in the reinforcing bar unit is arranged between the above, or if the inserting bar unit does not include the upper surface defining member, a separately prepared upper surface defining member is arranged, and the base portion is provided. It is characterized by forming a state that defines the height of the concrete.

With the above method, it is possible to save the labor of manually leveling the upper surface of the concrete serving as the base portion.

According to the present invention, since the sideways insertion portion is provided in advance on the rising portion of the insertion bar, the bending work of the insertion bar at the site can be omitted, and the work for producing the second concrete portion. It has various effects such as improving efficiency and speeding up.

It is a figure which shows the insertion bar unit which concerns on embodiment of this invention, FIG. It is a perspective view of the state which is positioned on the front side. It is a figure which shows the embodiment of this invention, and is the schematic cross-sectional view which showed the joint structure between the foundation and the soil using the reinforcement unit of FIG. It is explanatory drawing which showed the process of making the joint structure between the foundation and the soil of FIG. It is explanatory drawing which showed the post process of FIG. It is a perspective view which showed the insertion bar unit which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1A and 1B, in the insertion bar unit 1 of this embodiment, a plurality of (for example, four) insertion bars 11 having a substantially Z-shape are spaced apart from each other (for example, for example). , About 300 mm), and are connected to each other by connecting bars 12, 12 extending in the direction of this arrangement. For example, the connection is made by welding in the factory, and the reinforcing bar unit 1 is transported from the factory to the site. The connecting bar 12 may be fixed to the insertion bar 11 processed into a substantially Z shape, or the connecting bar 12 may be fixed to the straight bar-shaped reinforcing bar and then the straight bar-shaped reinforcing bar is bent to form a substantially Z shape. It may be processed into a shape.

The bar 11 is inserted in advance into the first concrete portion in order to join the second concrete portion to the first concrete portion (not shown), and the buried portion 11a and the rising portion 11b , The insertion portion 11c is provided in the same plane.

The buried portion 11a is a portion buried in the first concrete portion in a substantially horizontal state, and the rising portion 11b rises at approximately 90 degrees from one end side of the buried portion 11a, and the upper side is the first one. It is a part that protrudes upward from the concrete part. Further, the insertion portion 11c is a portion that is bent laterally at about 90 degrees on the upper side of the rising portion 11b.

The connecting bar 12 is fixed to a portion near the boundary portion (corner portion) between the buried portion 11a and the rising portion 11b and a portion near the boundary portion (corner portion) between the rising portion 11b and the insertion portion 11c. Has been done.

The reinforcing bar unit 1 is provided with a top surface defining member 13 that regulates the height of the top surface of the first concrete portion. For example, the upper surface defining member 13 is made of a long iron plate having a substantially L-shaped cross section, which is composed of a vertical plate portion and a lower horizontal plate portion, and is provided along the longitudinal direction of the reinforcing bar unit 1. In this example, the upper surface defining member 13 is adjustablely provided in the reinforcing bar unit 1. For example, a plate material (not shown) is welded to the rising portion 11b of the reinforcing bar unit 1, and long holes long in the vertical direction are formed in the plate material. On the other hand, the upper surface defining member 13 is formed with a screw insertion hole. The screw passed through the screw insertion hole is inserted into the long hole and fastened with a nut, whereby the vertical height of the upper surface defining member 13 with respect to the insertion bar unit 1 can be adjusted. The upper surface defining member 13 may be made of a material such as resin as long as it has a rigidity capable of defining the height of the upper surface of the first concrete portion.

Further, at the tip of the lower horizontal plate portion of the upper surface defining member 13, for example, a flexible portion 13a having a quadrangular cross section made of a material such as rubber is provided. The flexible portion 13a defines the height of the upper surface of the first concrete portion on the lower surface side thereof, while being flexible enough to be deformed by pressure from above (pressurization by the formwork plate at the time of demolding). have. Further, as an example, the height (thickness) of the flexible portion 13a is made thicker than the wall thickness of the lower horizontal plate portion, while the lower surface of the flexible portion 13a is the lower horizontal plate of the upper surface defining member 13. It is almost flush with the lower surface of the part. Moreover, both lower surfaces are flat surfaces.

Since the reinforcing bar unit 1 having the above configuration has a structure in which the lateral insertion portion 11c is provided in advance on the upper portion of the rising portion 11b, it is possible to omit the bending work of the reinforcing bar at the site, and the soil floor can be used. It is possible to improve the efficiency and speed of the work when the concrete 102 is struck. Further, the connecting bar 12 is fixed at two places, one near the boundary between the buried portion 11a and the rising portion 11b and the other near the boundary between the rising portion 11b and the insertion portion 11c. Therefore, the plurality of connecting bars 12 can be firmly fixed to each other, and the strength of fixing to the base portion 101a and the soil concrete 102 can be increased.

FIG. 2 shows an example of the joint structure 100 between the foundation and the soil. In the joint structure 100 between the foundation and the soil, the reinforcing bar unit 1 is used, the first concrete portion is used as the base portion 101a of the cloth foundation 101, and the buried portion 11a is embedded in the base portion 101a. The upper part of the rising portion 11b is projected from the base portion 101a, the second concrete portion is the soil concrete 102, and the upper portion of the rising portion 11b and the insertion portion 11c are present in the soil concrete 102. There is.

A vertically arranged reinforcing bar 101c is provided inside the rising portion 101b of the cloth foundation 101, and a horizontally arranged reinforcing bar 101d is provided inside the base portion 101a. The embedded portion 11a of the insertion bar 11 is connected to the horizontally arranged reinforcing bar 101d by a number line or the like. Further, the soil concrete 102 is provided with a soil side reinforcing bar 102a. The insertion portion 11c is connected to the soil-side reinforcing bar 102a by a number line or the like.

Next, a method of manufacturing the joint structure 100 between the foundation and the soil will be described with reference to FIGS. 3 and 4. The formwork plate 21 is installed at the place where the base portion 101a of the cloth foundation 101 is manufactured, and the formwork plate 22 is installed at the place where the rising portion 101b is manufactured. Further, the horizontally arranged reinforcing bars 101d are provided in the formwork made of the formwork plate 21, and the vertically arranged reinforcing bars 101c are provided in the formwork made of the formwork plate 22. Then, the rebar unit 1 is arranged at a position on the soil side of the horizontally arranged reinforcing bar 101d, and the embedded portion 11a thereof is connected to the horizontally arranged reinforcing bar 101d by a number line or the like. Further, the height of the upper surface defining member 13 is adjusted so that the lower surface thereof is substantially flush with the lower end surface of the formwork plate 22. When the flexible portion 13a is not provided, it is desirable that the tip end portion of the lower horizontal plate portion of the upper surface defining member 13 is slipped under the formwork plate 22.

The formwork made of the formwork plates 21 and 22 is filled with concrete as a cloth foundation 101. In the base portion 101a, this concrete is filled up to the lower surface position (the lower end surface position of the formwork plate 22) of the upper surface defining member 13. At this time, without the upper surface defining member 13, the concrete height in the narrow space between the rising portion 11b and the formwork plate 22 in the concrete serving as the base portion 101a cannot be defined, and this narrow space. It is necessary to manually level the upper surface of the concrete at the place of the space. On the other hand, if the upper surface defining member 13 is provided, it is possible to save the work labor such as manually leveling the upper surface of the concrete in the narrow space. If the horizontal width dimension of the narrow space is defined by the upper surface defining member 13, the horizontal positioning of the reinforcing bar unit 1 can also be performed by the upper surface defining member 13.

After curing the concrete, the formwork plates 21 and 22 are peeled off. At this time, the lower side of the formwork plate 22 may press the flexible portion 13a, but the flexible portion 13a is deformed by the flexibility with respect to this pressing, so that the formwork plate 21 can be peeled off without any trouble. be able to. After that, work such as backfilling, leveling, rolling, etc. is performed, and as shown in FIG. 1, the soil-side reinforcing bar 102a is produced, connected to the insertion portion 11c, and concrete to be soil concrete 102 is placed. do.

In the above example, the upper surface defining member 13 is fastened to the reinforcing bar unit 1 with screws and nuts, and when the soil concrete 102 is thrown in, the upper surface defining member 13 is fastened from the reinforcing bar unit 1. Although it was decided to remove it, the soil concrete 102 may be thrown in while leaving the upper surface defining member 13. Further, the structure may be such that the upper surface defining member 13 cannot be adjusted by attaching the upper surface defining member 13 to the reinforcing bar unit 1 with high accuracy. Even in this case, the soil concrete 102 may be formed while the upper surface defining member 13 is left. You may put it in. Alternatively, the upper surface defining member 13 may be attached to the reinforcing bar unit 1 in the field. Further, using a reinforcing bar unit that does not have the upper surface defining member 13, the upper surface defining member that regulates the height of the concrete upper surface should be attached to the formwork plate 22 at the site in the same manner as the upper surface defining member 13. It may be.

As shown in FIG. 5, the connecting bar 12 may be provided on the other end side of the embedded portion 11a and also on the tip end side of the insertion portion 11c. In this example, the connecting bar 12 is provided at the upper position on the other end side of the embedded portion 11a, and the connecting bar 12 is provided at the lower position on the tip end side of the insertion portion 11c. By increasing the number of the connecting bars 12 in this way, the plurality of connecting bars 12 can be fixed more firmly. Further, if the structure in which the connecting bar 12 is provided is adopted in this way, the fixing strength is increased. Therefore, for example, the length of the insertion portion 11c can be shortened to make the inserting bar unit 1 compact. .. It should be noted that the structure may be such that two or more connecting bars 12 are provided at appropriate positions such as a structure in which the connecting bars 12 are provided on the other end side of the embedded portion 11a and on the tip end side of the insertion portion 11c. Further, it is also possible to have a structure in which only one connecting bar 12 is provided.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to that of the illustrated embodiment. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

1: Reinforcing bar unit 11: Reinforcing bar 11a: Embedded part 11b: Standing part 11c: Inserting part 12: Connecting rebar 13: Top surface defining member 13a: Flexible part 21: Formwork plate 22: Formwork plate 100: Joining structure 101 : Cloth foundation 101a: Base part 101b: Rising part 101c: Vertically arranged reinforcing bar 101d: Horizontally arranged reinforcing bar 102: Soil concrete 102a: Soil side reinforcing bar

Claims (6)

It is provided with a bar that is inserted in advance into the first concrete part in order to join the second concrete part to the first concrete part later.
The bar is a buried portion buried in the first concrete portion, a rising portion that rises from one end side of the buried portion and the upper side protrudes upward from the first concrete portion, and the upper side of the rising portion. has a spigot extending transversely, a plurality of arranged at a predetermined interval, Ri Contact are connected to each other by connecting muscles extending in the direction of this arrangement,
The connecting bar is added to the vicinity of the boundary between the buried portion and the rising portion.
It is characterized in that it is provided at one or more locations near the boundary between the rising portion and the insertion portion, the other end side of the buried portion, and the tip end side of the insertion portion. Reinforcement unit. It is provided with a bar that is inserted in advance into the first concrete part in order to join the second concrete part to the first concrete part later.
The bar is a buried portion buried in the first concrete portion, a rising portion that rises from one end side of the buried portion and the upper side protrudes upward from the first concrete portion, and the upper side of the rising portion. has a spigot extending transversely, a plurality of arranged at a predetermined interval, Ri Contact are connected to each other by connecting muscles extending in the direction of this arrangement,
A reinforcing bar unit further comprising a top surface defining member that defines the height of the top surface of the first concrete portion . The rebar unit according to claim 2 , wherein two or more of the above connecting bars are provided. In the rebar unit according to claim 3 , the connecting bar is a portion near the boundary portion between the buried portion and the rising portion, a portion near the boundary portion between the rising portion and the insertion portion, and the buried portion. A rebar unit, characterized in that it is provided at two or more locations on the other end side of the above and on the tip end side of the insertion portion. In the reinforcing bar unit according to any one of claims 2 to 4 , the upper surface defining member is flexible to a place where a plate of a formwork for molding a concrete portion in the vicinity of the first concrete portion can come into contact. A reinforcing bar unit characterized by having a part. It is provided with a bar that is inserted in advance into the first concrete part in order to join the second concrete part to the first concrete part later.
The bar is a buried portion buried in the first concrete portion, a rising portion that rises from one end side of the buried portion and the upper side protrudes upward from the first concrete portion, and the upper side of the rising portion. It has a laterally extending insertion part, and a plurality of insertion parts are arranged at predetermined intervals, and a reinforcing bar unit connected to each other by connecting bars extending in the direction of this arrangement is used.
The first concrete portion is used as the base portion of the cloth foundation, the buried portion is embedded in the base portion, the upper part of the rising portion is projected from the base portion, and the second concrete portion is soil concrete. In this soil concrete, the upper side of the rising part and the insertion part are made to exist.
The upper surface defining member provided in the reinforcing bar unit is arranged between the reinforcing bar unit and the formwork plate forming the rising portion of the cloth foundation, or the reinforcing bar unit holds the upper surface defining member. A method for producing a joint structure between a foundation and soil, which comprises arranging a separately prepared upper surface defining member when not provided, and forming a state in which the height of the concrete serving as the base portion is regulated.

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