JPH0641979A - Foundation of steelwork frame - Google Patents

Abstract

PURPOSE:To simply arrange reinforment work, dispense with stud bolt, save labor, shorten construction period, and further dispense with charging many mandays at one time in a foundation work. CONSTITUTION:A pillar 2 of steelwork frame is built on the base part 7a of an independent footing 7. The pedestal is reinforced with reinforcing plates 12 of angle steel, and T-shaped reinforforced joint metal fittings 13 are fitted thereon. The straps 17, 18 of the reinforcements 14, 15 of a footing beam 8 are joined to the reinforced joint metal fitting 13 by means of bolts. Footing upper concrete is jointly placed on the base part 7a of the independent footing 7 so as to bury the pedestal together with winding reinforcements 22, 23 arranged around the pedestal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the foundation of a steel frame structure in middle- and high-rise houses and other buildings.

[0002]

2. Description of the Related Art Conventionally, as a structure for fixing a column base in a steel frame structure, as shown in FIG. 5, a column 52 is embedded in a foundation 51, or as shown in FIG. The structure provided is generally adopted.

In the example of FIG. 5, the base portion 51 of the independent foundation 51 is shown.
a is first struck, the pillar 52 is built on it, and after the root winding reinforcement 53 and the underground beam 54 reinforcement (not shown) of the pillar 52 are given, the concrete of the foundation upper part 51b and the underground Beam 5
The concrete of No. 4 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 columns 62 are built. The pillar 62 is provided with a wrapping bar 63, and the wrapping concrete 65 is post-cast. In any of the examples, the pedestal is provided with a large number of stud bolts 56 and 66 for securely fixing the columns 52 and 62. 5
Reference numerals 7 and 67 are base plates, and 58 and 68 are anchor bolts.

[0004]

The problems to be solved by the present invention are shown in FIGS.
In each of the conventional examples, since the underground beams 54 and 64 are laid out, it is not possible to use the columns 52 and 62 for positioning them, and it takes time and labor for the laying work, and a skilled reinforcing bar work is required. 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, which increases the construction time. Further, in the example of FIG. 5, at the joint between the column 52 and the underground beam 54, the reinforcement of the underground beam 54 and the root winding reinforcement 53, the stud bolt 56, etc. are mixed, and the reinforcement becomes even more complicated. Work becomes difficult.

Further, in the case of the example of FIG. 6, since the pillars 62 are built after the completion of the foundation work, in order to shorten the construction period, a large number of artificial numbers are put into the foundation work at one time to finish the foundation work early. It is necessary, and it is difficult to arrange rebar and formwork.
In addition, since the root-wrapping concrete 65 projects around the column base above the floor level FL, this projecting portion becomes a projecting portion into the room or interferes with the installation of wall materials or the like. There is.

[0006] The object of the present invention is to easily perform bar arrangement work, and to firmly fix the column base without requiring stud bolts, which saves labor and shortens the construction period. It is to provide a foundation for a steel frame structure that does not require a large number of inputs at one time.

[0007]

The foundation of the present invention is to construct a column of a steel frame on the base portion of an independent foundation, attach a rebar-bonded metal fitting to the column base, and arrange a reinforced concrete foundation beam on the rebar-bonded metal fitting. It is a bolt joint. On the base portion of the independent foundation, a foundation upper concrete is provided in which the column base is embedded together with the surrounding wrapping reinforcement.

[0008]

According to this structure, since the end portion of the reinforcing bar of the foundation beam is bolted to the reinforcing bar joining metal member provided on the column base, the end portion of the reinforcing bar of the foundation beam is joined to the column in a positioned state. . Therefore, the reinforcement work of the foundation beam can be easily performed, and the pre-arrangement of the foundation beam reinforcement in the factory becomes possible. Further, since the foundation beam reinforcement is joined to the column with the reinforcing bar joining hardware, the column is firmly fixed and the stud bolt of the column base can be omitted. Furthermore, since the construction will be performed after the base part of the independent foundation is constructed and then the remaining part of the foundation will be constructed, it is not necessary to invest a large number of man-hours in the foundation construction at one time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The steel frame 1 serves as a frame of a building such as a house or a building, and a column 2 made of a square steel pipe is used as an H
It is configured as a rigid frame structure joined by beams 3 made of shaped steel. The pillar 2 and the beam 3 are joined to each other by a bolt joint using a reinforcing angle 4 and a split tee 5 provided around the pillar 2. The foundation 6 of the entire steel frame structure is composed of an independent foundation 7 provided on each pillar 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 post-casting foundation upper concrete 7b (FIGS. 3 and 4). The foundation base portion 7a is cast on a pile (not shown) or directly serves as a foundation, and a base reinforcement (not shown) and the like are embedded inside. The pillar 2 is built on the foundation base portion 7a, and the base plate 9 is attached to the foundation base portion 7a.
It is joined to the anchor bolt 11 of a. The upper part of the foundation embedded part of the pillar 2 is the four reinforcing plates 1 made of angle materials.
2 are arranged at four corners to surround the outer surface, and a T-shaped rebar joining metal piece 13 is provided on the outer surface so as to project sideways. These reinforcing bar joining hardware 13 are joined to the pillar 2 together with the reinforcing plate 12 by the one side bolt 20 or the like.

The underground beam 8 is a reinforced concrete beam in which upper and lower main reinforcing bars 14 and 15 and stapling 16 are laid out and concrete 21 is laid. The end portions of the main reinforcing bars 14 and 15 have battled boards 17 and 18, respectively. Are welded. These battledore 1
7 and 18 are joined to the upper surface of the web of the reinforcing bar joint metal 13 and the upper surface of the base plate 9 with bolts and nuts 19.
In addition, a bolt insertion hole is made in advance at a predetermined position in the reinforcing bar joining hardware 13, the base plate 9, and the battledore plates 17, 18.

On the outer circumference of the pillar base of the pillar 2, a base base 7 is formed.
The vertical winding wire 22 for double-joint reinforcement also embedded in a is raised, and the peripheral winding hoop muscle 23 is arranged around it. The leg portion of the column 2 is embedded in the foundation upper concrete 7b together with these neck curls 22 and 23.

FIG. 4 shows a construction procedure. First, the same figure (A)
The basic base portion 7a of is constructed. In this case, after the pile driving, the base reinforcement, the vertical winding of the root winding 22, and the anchor bolt 11
Is set and the foundation concrete is placed to construct the foundation base portion 7a. On this foundation base part 7a,
The pillar 2 is built as shown in (B), 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 bar joint metal 13 in a factory or the like before being built.
Or the reinforcing plate 12 and the reinforcing bar joining hardware 13 are joined after erection.

The reinforcement bar 17 of the main bar 14 of the underground beam 8 (FIG. 2) is bolted to the reinforcing bar joining hardware 13 as shown in FIG. 2C, and the battlement plate 18 of the lower main bar 15 is bolted to the base plate 9. Stop. Further, a root-wrap hoop muscle 23 is arranged around the column 2. It is desirable that the main reinforcements 14 and 15 of the underground beam 8 and the stapling 16 be pre-arranged in a factory or the like. After the reinforcement is finished in this way, the foundation upper concrete 7b and the foundation concrete 21 of the underground girder 8 are placed, and the foundation consisting of the independent foundation 7 and the underground girder 8 is formed as shown in FIG. Be built.

According to the foundation of this structure, since the pillar 2 is constructed after the base portion 7a of the independent foundation 7 is constructed, and the rest of the foundation 6 is constructed after that, the artificial number in the foundation construction is reduced. It is not necessary to put many in one time, and it is easy to arrange reinforcement work and formwork. In addition, since the main bars 14 and 15 of the underground beam 8 are bolted to the pillar 2 through the reinforcing bar joint metal 13, the bar arrangement is easy and the construction is simple. Moreover, the reinforcement of the underground beam 8 has a simple structure, and the processing and assembly of the formwork of the underground beam 8 are also easy. Further, since the main bars 14 and 15 of the underground beam 8 are joined to the pillar 2, the pillar leg portion can be firmly fixed without hitting the stud bolt, which also improves the workability.

Further, since the reinforcing bar joining metal fitting 13 provided on the pillar 2 is fitted, the reinforcing bars 14 to 16 of the underground beam 8 can be pre-arranged and can be processed in a factory. Therefore, it is possible to save labor on site, and it is not necessary to have a skilled reinforcing bar worker for the bar arrangement work. Further, in the case of pre-arrangement, it is possible to set at the time of constructing the steel frame, and the setting work does not require a reinforcing bar work. Therefore, it is possible to deal with the current situation where there is a shortage of reinforcing bars. According to this foundation, labor saving can be achieved due to these various advantages, leading to shortening of the construction period.

In the above embodiment, the concrete beam 8 is cast on site, but the underground beam 8 may be precast by precasting concrete.
Further, the reinforcing bar joining hardware 13 is not limited to the example shown in the figure, and various structures can be used.

[0018]

EFFECTS OF THE INVENTION In the foundation of the steel frame structure of the present invention, since the reinforcement of the foundation beam is bolted to the reinforcing bar joint metal provided on the column,
Reinforcement work of foundation beams becomes easy. Moreover, 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. As a result, labor can be saved and the construction period can be shortened. In addition, since the construction of the base part of the independent foundation is done after the construction, and the rest of the foundation is constructed after that, it is not necessary to invest a large number of artificial man-hours in the foundation work at one time, and the reinforcement work and mold Arrangement of frame work becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a foundation and a steel frame structure 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 foundation.

FIG. 4 is an explanatory view of the same process.

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

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

[Explanation of symbols]

1 ... Steel frame structure, 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 ... Reinforcing plate, 13 ... Reinforcing bar joint hardware, 14, 15 ...
Underground beam main bar, 22 ... Nemaki vertical bar, 23 ... Nemaki hoop bar

Claims (1)

[Claims] 1. A column of a steel frame structure is built on a base portion of an independent foundation, a reinforced joint metal fitting is attached to the column base, and a reinforcement of a reinforced concrete foundation beam is bolted to the reinforced joint metal fitting,
A foundation of a steel frame structure in which, on the base portion of the independent foundation, a foundation upper concrete in which the column base and the root winding reinforcement around the column base are embedded is provided.