JP2614000B2 - Basics of steel frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation for a steel frame in a middle-to-high-rise house or other building.

[0002]

2. Description of the Related Art Conventionally, as a fixing structure of a column base in a steel frame structure, a structure in which a column 52 is embedded in a foundation 51 as shown in FIG. The structure provided is generally adopted.

FIG. 5 shows an example of a base portion 51 of an independent foundation 51.
a, first, a pillar 52 is erected thereon, and a reinforcement of the base winding 53 of the pillar 52 and a reinforcement of the underground beam 54 (not shown) are given. Beam 5
No. 4 concrete was cast. The example in FIG.
After completing the construction of the independent foundation 61 and the underground beam 64,
It is a structure in which a pillar 62 is built. The column 62 is provided with a root winding arrangement 63, and a root winding concrete 65 is post-punched. In any of the examples, the column base is provided with a large number of stud bolts 56, 66 for ensuring the fixing of the columns 52, 62. 5
Reference numerals 7 and 67 denote base plates, and 58 and 68 denote anchor bolts.

[0004]

FIG. 5 and FIG.
In the prior art, the underlaying beams 54, 64 are both arranged, and the pillars 52, 62 cannot be used for the positioning. become. Moreover, in order to firmly fix the columns 52 and 62, it is necessary to hit a large number of stud bolts 56 and 66, and the construction time becomes long. Further, in the example of FIG. 5, the reinforcement of the underground beam 54, the root winding reinforcement 53, the stud bolt 56, and the like are mixed in the joint portion between the column 52 and the underground beam 54, which makes the arrangement more complicated. Work becomes difficult.

Further, in the case of the example shown in FIG. 6, since the pillar 62 is erected after the completion of the foundation work, in order to shorten the construction period, a large number of man-hours are put into the foundation work at one time to finish the foundation work earlier. It is necessary to arrange reinforcement and formwork.
Moreover, since the root-moulding concrete 65 protrudes around the column base above the floor level FL, this protruding portion becomes a protruding portion into the room or hinders installation of wall materials and the like. There is.

SUMMARY OF THE INVENTION It is an object of the present invention to easily perform bar arrangement work and to firmly fix a column pedestal without the need for stud bolts, thereby saving labor and shortening the construction period, and further improving the man-hour in foundation work. The purpose is to provide a foundation for a steel frame that does not require a large number of inputs at once.

[0007]

According to the present invention, a column made of a square steel pipe of a steel frame is built on a base portion of an independent foundation, and an outer surface of an upper portion of the column base is made of an angle material.
The reinforcing plates are placed in the corners and stacked on each other, and
Overlap the T-shaped rebar joint metal on the outer surface,
Reinforcing metal fittings are bolted together with the reinforcing plate to the column base
And this reinforced joint metal fittings on the upper side of the reinforced concrete foundation beam
Bolts to the reinforcements that will be the main reinforcement of the
G Reinforcement that will be the main reinforcement below the foundation beam is attached to the lower end face of the column base.
It is bolted to the provided base plate . On the base portion of the independent foundation, there is provided a foundation upper concrete in which the column base is embedded together with the surrounding reinforcements.

[0008]

According to this configuration, the end of the reinforcing bar of the foundation beam is bolted to the reinforcing metal joint provided on the column base, so that the end of the reinforcing bar of the foundation beam is joined to the column in a positioning state. . Therefore, the reinforcement work of the foundation beams can be easily performed, and the pre-arrangement of the reinforcement beams in the factory can be performed. In addition, since the foundation beam reinforcement is joined to the column with the reinforcing metal joint, the column is firmly fixed, and the stud bolt at the column base can be omitted. Furthermore, since the erecting is performed after the construction of the base portion of the independent foundation, and then the rest of the foundation is constructed, it is not necessary to input a large number of man-hours in the foundation work at one time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The steel frame 1 is a framework of a building such as a house or a building.
It has a rigid frame structure joined by beams 3 made of shaped steel. The joint between the column 2 and the beam 3 is a bolt joint with a reinforcing angle 4 and a split tee 5 provided around the column 2. The foundation 6 of the entire steel frame is composed of an independent foundation 7 provided on each column 2 and an underground beam 8 which is a foundation beam connecting adjacent independent foundations 7.

Each independent foundation 7 is composed of a foundation base portion 7a and a later-cast upper foundation concrete 7b (FIGS. 3 and 4). The base base portion 7a is cast on a pile (not shown) or is directly used as a base, and a base reinforcing bar (not shown) or the like is embedded therein. The column 2 is built on the foundation base 7a, and the base plate 9 is
a to the anchor bolt 11. The upper part of the base embedded portion of the pillar 2 has four reinforcing plates 1 made of an angle material.
2 are arranged at four corners to surround the outer surface, and a T-shaped rebar joint metal fitting 13 is provided on the outer surface so as to protrude laterally. These reinforcing metal joints 13 are joined to the column 2 together with the reinforcing plate 12 by one-side bolts 20 or the like.

The underground beam 8 is a reinforced concrete beam in which concrete 21 is placed by arranging upper and lower main reinforcements 14 and 15 and stirrups 16, and feather plates 17 and 18 are provided at ends of the main reinforcements 14 and 15. Is welded. These feather boards 1
7 and 18 are joined to the upper surface of the web of the reinforcing metal joint 13 and the upper surface of the base plate 9 with bolts and nuts 19.
In addition, bolt insertion holes are formed in predetermined positions in the reinforcing metal fittings 13, the base plate 9, and each of the blade plates 17 and 18 in advance.

On the outer periphery of the column base of the column 2, a base base 7
The root reinforcement 22 for joint reinforcement and reinforcement embedded in advance in a is raised, and the root hoop reinforcement 23 is arranged around the reinforcement. The leg portions of the column 2 are embedded in the foundation upper concrete 7b together with the root reinforcements 22 and 23.

FIG. 4 shows a construction procedure. First, FIG.
Is constructed. In this case, the base reinforcement, the root winding longitudinal reinforcement 22, and the anchor bolt 11
Is set, and foundation concrete is cast to construct the foundation base portion 7a. On this basic base part 7a,
As shown in (B), the pillar 2 is built, and the base plate 9 is fastened to the anchor bolt 11 with a nut. The pillar 2 is provided with a reinforcing plate 12 and a reinforcing metal joint 13 at a factory or the like before building.
Or the reinforcing plate 12 and the reinforcing metal joint 13 are joined after construction.

As shown in FIG. 2C, the blade 17 (FIG. 2) of the main bar 14 of the underground beam 8 is bolted to the reinforcing metal fitting 13, and the blade 18 of the lower main bar 15 is bolted to the base plate 9. Stop it. In addition, root winding hoops 23 are arranged around the pillar 2. It is desirable that the main reinforcements 14 and 15 of the underground beam 8 and the stirrup 16 be prearranged at a factory or the like. After the reinforcing arrangement is completed in this way, the foundation upper concrete 7b and the foundation concrete 21 of the underground beam 8 are cast, and the foundation composed of the independent foundation 7 and the underground beam 8 as shown in FIG. Be built.

According to the foundation of this configuration, the pillar 2 is constructed after the construction of the base portion 7a of the independent foundation 7, and then the rest of the foundation 6 is constructed. It is not necessary to put in many at once, and it is easy to arrange reinforcement and formwork. Further, since the main reinforcements 14 and 15 of the underground beam 8 are bolted to the column 2 via the reinforcing metal fittings 13, the arrangement of the reinforcements is easy and the construction is simple. In addition, the reinforcement of the underground beam 8 has a simple configuration, and the processing and assembly of the formwork of the underground beam 8 are also simplified. In addition, since the main reinforcements 14 and 15 of the underground beam 8 are joined to the column 2, the column base can be firmly fixed without hitting stud bolts, thereby improving workability.

Further, since the reinforcements 14 and 16 of the underground beam 8 can be pre-arranged because they are engaged with the reinforcing metal fittings 13 provided on the columns 2, they can be processed at a factory. For this reason, labor saving at the site can be achieved, and a skilled rebar builder is not required for the rebar arrangement work. Also, in the case of pre-arrangement, it is possible to set the steel bar at the time of steel construction, and no reinforcing bar is required for the setting work. For this reason, it is possible to cope with the current situation in which there is a shortage of reinforced works. According to this foundation, labor saving can be achieved by these various advantages, leading to a shortened construction period.

In the above-described embodiment, the concrete placement of the underground beam 8 is performed on site. However, the underground beam 8 may be precast by casting concrete in advance.
Further, the reinforcing metal joint 13 is not limited to the illustrated example, and various structures can be used.

[0018]

The foundation of the steel frame according to the present invention is formed by connecting the reinforcing bars of the foundation beam to the reinforcing metal joints provided on the columns by bolts.
Reinforcement work of the foundation beam is simplified. In addition, since the reinforcement of the foundation beam is joined to the column, the column is firmly fixed, and the stud bolt of the column base can be omitted. For these reasons, labor can be saved and the construction period can be shortened. In addition, since the erecting is performed after the construction of the base part of the independent foundation, and then the rest of the foundation is constructed, it is not necessary to input a large number of man-hours in the foundation work at once, Arrangement of framing work becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a foundation and a steel frame according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cutaway perspective view of the foundation.

FIG. 3 is a partial side view of the same foundation.

FIG. 4 is also a process explanatory view of the same.

FIG. 5 is a sectional view of a conventional example.

FIG. 6 is a sectional view of another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steel frame, 2 ... Column, 3 ... Beam, 6 ... Foundation, 7 ... Independent foundation, 7a ... Base part, 7b ... Foundation upper concrete, 8
... Underground beam, 9 ... Base plate, 11 ... Anchor bolt, 12 ... Reinforcement plate, 13 ... Reinforcing metal fittings, 14, 15 ...
The main reinforcement of the underground beam, 22 ... vertical root winding, 23 ... hoop hoop

Claims (1)

(57) [Claims] 1. A column made of a square steel pipe of a steel frame is erected on a base portion of an independent foundation, and an upper outer surface of the column base is provided.
In addition, reinforcing plates made of angle materials are
You know, T-shaped rebar on the outer surface over both adjacent reinforcing plates
Lay the metal joints, and put this reinforcing metal joint together with the reinforcing plate.
Bolted to the column pedestal, and bolted to the reinforcing bar as the main reinforcement on the upper side of the reinforced concrete foundation beam
And the main reinforcement below the reinforced concrete foundation beam
Connect the streaks to the base plate provided on the lower end face of the column base.
And belt joint, before SL on the base portion of the independent basic, the column base and foundation of the column base steel frames in which a foundation upper concrete embedded Nemaki reinforcement around.