JPH0988082A - Fixing method and structure of building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by combining a main reinforcement and an anchor section. SOLUTION: A ground surface 41 is excavated, and leveling concrete 4 is placed on a ground base 42. A bolt setting base 45 is arranged on leveling concrete 44, and main reinforcements 48 are mounted on the bolt setting base 45. The front end sections of the main reinforcements 48 are projected from a baseplate mounting surface 50, and screws as anchor sections are fitted to projecting sections. Hoops are disposed to the lower section of the baseplate mounting surface 50, and forms are assembled around the hoops, and concrete is placed, thus forming a footing 46. Concrete is cured, the forms are removed, and soil and sand are filled back. A baseplate 52 is welded at one end section of a steel-framed column 51, and through-holes are formed to a plate surface section 52a and reinforcing plates 52b are welded around the through-holes in a latticed shape. The welded steel-framed column 51 is built onto the baseplate mounting surface 50 at that time, and clamped onto the anchor sections of the main reinforcements 48, and the steel-framed column 51 is fixed onto the footing 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and structure for fixing a building material in a reinforced concrete structure, and more particularly, a building material in which a main bar is projected from a reinforced concrete surface and the projecting part of the main bar is an anchor to fix the building material. It relates to a fixing method and a structure.

[0002]

2. Description of the Related Art Conventionally, there are roughly two types of fixing methods for building materials in a reinforcing bar structure. For example, when the method of fixing a steel frame pillar is used as an example, there is a root winding type as shown in FIG. 4 as the former. In this type, excavation is performed from the ground surface 1, crushed stones 3 are laid on the ground bottom surface 2 after the excavation and compacted, and then discarded concrete 4 is placed. On the upper surface side of the discarded concrete 4, a plurality of foundation rising reinforcing bars (hereinafter referred to as main reinforcing bars) 5 are arranged in a direction perpendicular to the ground surface 1 so as to surround a steel column to be fixed, which will be described later. The total length of the main bar 5 is a length exceeding the ground surface 1 from the upper surface side of the discarded concrete 4. And, the main bar 5 has a strip reinforcing bar 6
Are arranged so as to be bundled from the lower end of the main bar 5 to the base plate mounting surface 7 at the position where the steel frame column is mounted. Anchor bolts 8 are arranged vertically in the central area of the base plate mounting surface 7 surrounded by the main bars 5 so that the threaded portion projects from the base plate mounting surface 7. Then, in order to form the foundation footing 9, a concrete pouring formwork is assembled from the base plate mounting surface 7 to the depth of the discarded concrete 4 and concrete is poured into the frame to cure and cure. After the casting concrete is hardened, the concrete casting form is removed, and the earth and sand are backfilled to the height of the base plate mounting surface 7.

In order to fix the steel pillar 10 as a building material to the foundation footing 9, a base plate 11 is welded and fixed to the bottom surface of the steel pillar 10. The base plate 1
In the central area of the plate surface side of No. 1, the anchor bolt 8
A through hole is provided in a portion corresponding to the arrangement location of.
Therefore, the base plate 11 can be inserted into the anchor bolt 8, and the plate surface side of the base plate 11 can be brought into contact with the base plate mounting surface 7. Further, a plurality of stud bolts 12 are welded to the side portion of the steel frame column 10 up to a height corresponding to the main bar 5 in order to increase the adhesive force with the concrete to be placed in the root winding portion described later. A steel frame column 10 to which a base plate 11 and a stud bolt 12 are welded is built on the base plate mounting surface 7, and a nut member 13 is fastened to the anchor bolt 8 and fixed to the foundation footing 9. After the steel column 10 is fixed to the foundation footing 9, the upper main bar 5 is bound from the base plate 11 by the band reinforcing bar 6 to form the root winding part 14.
Then, a concrete pouring form is assembled around the root winding portion 14 and concrete is poured again. After the casting concrete is cured and hardened, the concrete casting form is removed, and if necessary, mortar or paint is applied to the surface of the casting concrete of the root winding portion 14 to finish it.

As the latter, there is a fixed type of an exposed steel column as shown in FIG. Similarly to the above-mentioned root winding method, excavation is performed from the ground surface 21, and the ground bottom surface 22 after the excavation is performed.
Crushed stones 23 are laid on the ground, rolled and then discarded Concrete 2
Place 4 A bolt set table 25 is fixed to the upper surface of the discarded concrete 24, and an anchor bolt 26 is provided on the bolt set table 25 in a direction perpendicular to the ground surface 21. The surface of the anchor bolt 26 is covered with an unbonded sleeve 27 for the purpose of increasing the fixing strength when attaching a steel column described later. As a result, the anchor bolts 26 do not adhere to the cast concrete described later, and the anchor bolts 26 can maintain the tension between the steel column and the bolt setting table 25 and hold them. Then, a plurality of foundation rising reinforcing bars (hereinafter referred to as main bars) 28 are arranged on the upper surface side of the discarded concrete 24 in a direction perpendicular to the ground surface so as to surround the anchor bolts 26. Further, the entire length of the main bar 28 is set within a range from the upper surface side of the discarded concrete 24 to the base plate mounting surface 29 where the steel frame column is mounted. Also, in the main line 28,
From the lower end of the main reinforcement 28 to the reinforcing bar 30, the base plate mounting surface 2
Place multiple pieces so that they are bundled up to 9. Then, in order to form the base footing 31, the base plate mounting surface 29
Assemble a concrete casting formwork from the above to the depth of the discarded concrete 24, place concrete in the frame, and cure and cure. After the casting concrete is hardened, the concrete casting form is removed, and the earth and sand are backfilled to the base plate mounting surface 29.

The steel column 32 serving as a building material has a base plate 33 welded and fixed to the bottom surface of the steel column 32 for fixing to the foundation footing 31. The base plate 3
On the plate surface side of No. 3, a through hole is provided in a portion corresponding to the location of the anchor bolt 26. For this reason, the base plate 33 can be inserted into the anchor bolt 26, and the plate surface side of the base plate 33 can contact the base plate mounting surface 29. Then, the welded steel frame column 32 of the base plate 33 is built in the base plate mounting surface 29, and the nut member 34 is fastened to the anchor bolt 26 and fixed to the foundation footing 31.

[0006]

However, in the root-wrapping method, which is a method of fixing a steel-framed pillar, since the steel-framed pillar is built after the foundation footing is formed, and the root-wound portion is formed after that, the construction of the steel-framed pillar is performed. Before and after the incorporation, basic work such as bar arrangement, formwork assembly and removal, and concrete placement is required.
This complicates the work process and lowers the work efficiency. Further, since the root winding portion is provided, concrete that covers the reinforcing bars of the root winding portion is required, which increases the usage amount of the poured concrete and causes a cost increase. Further, the formation of the neck-wound portion causes a problem that the space around the pillar of the building is reduced and the room cannot be effectively used. Further, dust is likely to be accumulated in the step portion with the steel column at the upper end of the neck wrapping portion, which makes the structure unsuitable for places where hygiene facilities require cleanliness.

[0007] In the exposed type, although the above-mentioned problems in the neck wrapping method can be almost compensated, the sizes of the bolt set base and the anchor bolt are larger than those in the root wrapping method for the purpose of increasing the fixing degree of the steel column. . For this reason, during the foundation work, the anchor bolts are likely to interfere with the surrounding main bars, which requires precision in the arrangement of the main bars and the anchor bolts, which causes a cost increase. Further, since the steel column is fixed only by the anchor bolt and the nut member, the base plate is required to have strength, and the base plate is provided with a reinforcing plate to secure the strength. For this reason, the structure of the base plate becomes special, and the production of the integrated type including the reinforcing plate becomes a special order, and the base plate is made of improved expensive welded structural cast steel. The unit price will increase and the cost will increase.

The present invention focuses on the above-mentioned conventional problems, and
The purpose is to provide a method for fixing construction materials that is easy to construct, uses a small amount of concrete to be used for foundation work, has good workability, and has a low cost. Secondly, the structure of the base plate has been simplified. By doing so, it aims to reduce costs.

[0009]

SUMMARY OF THE INVENTION The present invention provides an anchor portion for fixing a construction material to a main bar of reinforced concrete,
It was made based on the knowledge that the building material can be fixed to the reinforced concrete by also using the main bar and the anchor part, and that the base plate used to fix the building material can be formed by welding with the reinforcing ribs standing on the flat plate. It is a thing.

From the above knowledge, the present invention is characterized in that the main bar is projected from the surface of the reinforced concrete, and the projecting part of the main bar is used as the anchor part to fix the building material to the reinforced concrete with the anchor part and the fixing member.
The first object is achieved.

Specifically, the main bar for footing is projected from the top surface of the footing and a screw portion is formed on the protruding part of the main bar, and a building material having a base plate is erected on the top surface of the footing, and the base plate is attached to the base plate. After the main bar protruding portion was passed through the formed hole, it was screwed and fixed by a nut member.

Further, the base plate has a flat plate having a through hole corresponding to the position of the projecting portion of the main bar and a reinforcing rib surrounding the through hole of the flat plate, which is erected and welded to achieve the second object. It was done.

In the present invention, since the main bar and the anchor section for fixing the building material are used in common, it is possible to carry out the foundation work without paying attention to the interference between the main bar and the anchor section.
From this, the workability is improved and the cost can be reduced.
In addition, since the members are also used, the burden of material costs and member management costs is reduced, which also makes it possible to reduce costs.

Further, in the base plate, since the reinforcing ribs are attached by welding, the manufacturing is facilitated and the manufacturing cost can be reduced.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Specific embodiments of a construction material fixing method and structure according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a structural explanatory view of a building material fixing method for a reinforcing bar building. As a method of fixing a building material in a reinforced structure, excavation is performed from the ground surface 41 to the ground bottom 42, and crushed stones 43 are laid on the ground bottom 42 after the excavation. After that, the crushed stones 43 laid on the ground bottom surface 42 are compacted with a roller, and crushed stones 4
Finish the surface of No. 3 flat. In this way, abandoned concrete 44 is placed on the surface of the crushed stone 43 that has been compacted, and on the upper surface of the abandoned concrete 44, a bolt set base 45 and a foundation footing 46 for fixing the foundation rising rebar are formed. The base muscle 47 is arranged. Then, a foundation rising reinforcing bar (hereinafter referred to as “main reinforcing bar”) 48 is provided on the bolt set base 45 so as to surround the outer edge portion of a steel frame column, which will be described later, for reinforcement against bending stress. Also main line 48
Of the base plate mounting surface 50, which is the top end surface of the footing 46, is provided with a screw portion serving as an anchor bolt. Further, inside the foundation footing 46 below the base plate mounting surface 50, in order to reinforce against the shearing force, a plurality of band reinforcing bars 49 are arranged around the main bar 48 so as to be bundled from the lower end of the main bar 48 to the base plate mounting surface 50. To do. In order to form the base footing 46 after placing these members,
Waste concrete 44 depth to base plate mounting surface 5
Assemble the concrete pouring formwork to 0 and place concrete in the frame. Then, the concrete footed in the frame is cured to form the foundation footing 46. After the cast concrete is hardened, the concrete casting form is removed, and then the soil is backfilled to the base plate mounting surface 50. In addition, a non-shrink mortar 55 is placed on the base plate mounting surface 50 before the steel column is built, and the mounting height of the steel column is adjusted.

FIG. 2 is an explanatory view of a state of a steel frame column and a base plate fixed by welding. A base plate 52 is fixed to one end of a square-shaped steel frame column 51 serving as a building material by welding, and the base plate 52 is a flat plate portion 52a made of inexpensive general structural steel and a reinforcing plate 52b serving as a reinforcing rib. It is composed of two members. The shape of the flat plate portion 52a, which is a constituent member of the base plate 52, is
The cross section of the steel column 52 is a square shape with an enlarged cross section, and the surface condition is the base plate mounting surface 5 described later.
It is flat without protrusions so that it can be brought into close contact with the base plate mounting surface 50 when it contacts 0. Further, the flat plate portion 52a is provided with a through hole 56 used when fixing the base plate 52 to the base footing 46. The through hole 56 is arranged at a position corresponding to the position of the main bar 48 described above, and the base plate 5
2 is attached to the foundation footing 46, the through hole 5
The main bar 46 is inserted through the plate 6, and the flat plate portion 52a is brought into close contact with the basic footing 46. Also main line 48
Since the anchor portion of the main plate 48 has a sufficient length with respect to the plate thickness of the flat plate portion 52a, the anchor portion of the main bar 48 is attached to the flat plate portion 5 when the base plate 52 is attached to the foundation footing 46.
Since it projects from 2a, it can be fixed with a bolt material described later. The reinforcing plate 52b, which is another component of the base plate 52, is provided for the purpose of improving the strength of the flat plate portion 52a and firmly fixing the steel frame column 51 to the foundation footing 46. It is arranged on the 51 side so as to surround the through hole 56. When the base plate 52 is attached to the base plate attachment surface 50, the load from the steel column 51 and the force for fixing the base plate 52 at the anchor portion are applied to the flat plate portion 5.
Although concentrated on 2a, since the strength can be secured by the reinforcing plate 52b, the base plate can securely fix the steel frame column 51 to the base plate mounting surface 50. Further, since the flat plate portion 52a and the reinforcing plate 52b are made of the same material as the steel frame column 51, the flat plate portion
It is possible to weld the reinforcing plate 52b to the 2a to form the base plate 52 and, at the same time, to weld the steel column 51 to the base plate 52. Then, the above-mentioned steel column 51 with the base plate 52 is transported from the factory to the construction site.

FIG. 3 is an attachment explanatory view showing how a building material is attached to the foundation footing. Steel column 51 described above
At, the end portion side where the base plate 52 is not welded is lifted by a crane or the like and suspended from the steel frame column 51. Then, the end side where the base plate 52 is welded is brought close to the base plate mounting surface 50 of the base footing 46. As described above, a plurality of main bars 48 that also serve as anchor bolts project from the base plate mounting surface 50. The direction of the steel column 51 is operated by a crane or the like with respect to the plurality of projected main bars 48, and the base plate 52
It is adjusted so that it can be inserted into the through hole 56 provided in the.

From this state, the steel column 51 is lowered, and the base plate 52 is brought into contact with the base plate mounting surface 50 while inserting the through hole 56 into the main bar 48. After the base plate 52 is brought into contact with the base plate mounting surface 50 in this manner, the nut member 54 serving as a fixing member is screwed onto the threaded portion at the tip of the main bar inserted through the through hole 56. Then, by sandwiching the base plate 52 between the base plate mounting surface 50 and the nut member 54, the steel column 51 is fixed to the foundation footing 46.

In the present embodiment, the cross-sectional shape of the steel column is described as being square, but even in the case of a round steel bone, this can be dealt with by changing the location of the main bar 48 and the arrangement of the reinforcing plates 52b on the base plate 52. It is possible to obtain the same effect of cost reduction as in the case of the rectangular steel frame column.

[0020]

As described above, according to the present invention, since the main bar of reinforced concrete is also used as the anchor part for fixing the construction material, it is possible to pay attention to the interference between the main bar and the anchor part in the foundation work. It becomes possible to carry out construction.
From this, the workability is improved and the cost can be reduced. In addition, since the members are also used, the burden of material costs and member management costs is reduced, which also makes it possible to reduce costs.

In the base plate, since the reinforcing plate serving as the reinforcing rib is attached by welding, the manufacturing is easy and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a building material fixing method for a reinforcing bar building.

FIG. 2 is a state explanatory view of a steel frame column and a base plate fixed by welding.

FIG. 3 is an attachment explanatory view showing a manner in which a building material is attached to a foundation footing.

FIG. 4 is a structural explanatory view of a root-wound type which is a conventional method for fixing a building.

FIG. 5 is an explanatory view of a structure of an exposed type which is a conventional structure fixing method.

[Explanation of symbols]

 1 Ground surface 2 Ground floor 3 Crushed stone 4 Discarded concrete 5 Foundation rising reinforcing bar (main reinforcing bar) 6 Belt reinforcing bar 7 Base plate mounting surface 8 Anchor bolt 9 Foundation footing 10 Steel column 11 Base plate 12 Stud bolt 13 Nut member 14 Root winding part 21 Ground surface 22 Ground bottom 23 Crushed stone 24 Abandoned concrete 25 Bolt set stand 26 Anchor bolt 27 Unbonded sleeve 28 Foundation rising rebar (main bar) 29 Base plate mounting surface 30 Belt rebar 31 Foundation footing 32 Steel column 33 Base plate 34 Nut member 41 Ground surface 42 Ground floor 43 Crushed stone 44 Discarded concrete 45 Bolt set stand 46 Foundation footing 47 Base reinforcement 48 Foundation rising reinforcement (main reinforcement) 49 Belt reinforcement 50 Base plate mounting surface 51 Steel column 52 base Base plate 52a flat plate portion 52b reinforcing plate 54 nut member 55 non-shrink mortar 56 through hole

Claims (4)

[Claims] 1. A method for fixing a building material, characterized in that a main bar is projected from the surface of reinforced concrete, and the projecting section of the main bar is used as an anchor part to fix the building material to the reinforced concrete with the anchor part and a fixing member. 2. A footing main bar is projected from the footing top end surface and a screw portion is formed on the main bar protruding portion, and a building material provided with a base plate is erected on the footing top end surface, and a hole is formed in the base plate. A method for fixing a building material, comprising inserting the main bar protruding portion and then screwing and fixing the nut member with a nut member. 3. A main bar for footing, which projects from the top surface of the footing and has a threaded portion at its tip, a base plate placed on the top surface of the footing, and a construction material fixed to the base plate. The main bar is inserted through the base plate. A construction material fixing structure characterized in that a construction material is fixed by tightening with a nut member. 4. The base plate is formed by welding a flat plate having a through hole corresponding to the position of the protrusion of the main bar and a reinforcing rib surrounding the through hole of the flat plate so as to stand. Construction material fixed structure.