JPH11131585A - Building frame body structure and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building frame structure and the construction method thereof through which columns-beams constituting the building frame structure can be easily and securely constructed. SOLUTION: After a column member 18 has been hung on a base mortar 17 and erected, it is adjusted for the erection. Then, in this condition, concrete C2 is placed in the lower end of the column member 18 to fix the column member 18. Thereafter, a beam steel frame 25 is laid on the head of the column member 18. And when the beam is laid, the end of the beam steel frame 25 is extended sideways from the column member 18 and set on the head of the column member 18. Thereafter, this beam steel frame 25 is connected to other beam steel frame 25 and then, the beam steel frame 25 is completely fixed to the column member 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure suitable for use in building a frame of a building and a method of building the same.

[0002]

2. Description of the Related Art Conventionally, as a construction method for efficiently constructing a building frame of a building, a so-called VH construction method, in which vertical members such as columns and horizontal members such as beams are separately and alternately constructed, is referred to as a VH method. There is something.

For example, as shown in FIG. 9, when the column 1 is made of reinforced concrete (hereinafter, referred to as "RC structure") and the beam 2 is made of steel frame (hereinafter, referred to as "S structure"). First, as shown in FIG. 9 (a), a reinforcing bar 3 constituting a pillar 1 is installed with its lower end buried in a foundation concrete 4, and then a formwork is formed as shown in FIG. 9 (b). 5 and cast concrete 6 into the formwork 5 to construct the RC column 1. At this time, the column 1 and the foundation concrete 4 are rigidly joined. Thereafter, as shown in FIG. 9C, an S-shaped beam 2 is set between the columns 1, 1 constructed at predetermined intervals in this manner, and the continuous beams 2, 2 are connected to each other by the head of the column 1. The skeleton is built by joining on top. In some cases, a beam joining bracket is attached to the head of the column 1 and the beams 2 are continuously joined via the bracket.

The present applicant has already proposed and put to practical use such a technique as disclosed in Japanese Patent Publication No. 61-18620, for example.

[0005]

However, the above-mentioned conventional techniques have the following problems.
First, when erection of the beam 2 on the column 1 constructed in advance, if the level of the head of each column 1 is different,
2 A step is generated at the part where the two meet, and the beams 2 and 2
There are problems such as difficulty in joining together, and the fact that the beam 2 is inclined and cannot be securely joined to the upper surface of the head of the column 1 or the beam joining bracket. Therefore, each pillar 1
It is necessary to adjust the level of engagement with the beam 2 on the head of the vehicle, and the labor of assembling the scaffolding and the like is also extra. Therefore, the construction of the pillar 1 is troublesome.

When the pillar 1 is made of a precast concrete structure (hereinafter referred to as "PC structure") instead of the RC structure, it is necessary to adjust the level of the head of the column 1 with high precision by using the PC structure. The level of the foundation concrete 4 for erection 1 must be leveled with high precision. Moreover, since it is necessary to install the column 1 vertically, the foundation concrete 4 must be leveled out. As a result, it takes more time and effort. Moreover, in order to securely fix the PC-made column 1 to the foundation concrete 4, it is necessary to join it to anchor bars or the like buried in the foundation concrete 4, and the joining work also takes time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a skeleton structure capable of easily and surely constructing a beam and column constituting a skeleton and a method of constructing the same. I do.

[0008]

The invention according to claim 1 is
The pillars constituting the skeleton are erected by embedding a predetermined length of the lower end portion thereof in concrete, and the beams erected at the heads of the pillars project from the heads of the pillars sideways. It is characterized by being joined to another beam.

According to a second aspect of the present invention, after the pillar members constituting the pillars of the skeleton are set at predetermined positions, the pillar members are adjusted for installation, and in this state, concrete is poured into the lower end of the pillar members. And fixing the column member, and thereafter, a beam is erected on the head of the column member.

According to a third aspect of the present invention, in the method for constructing a skeleton according to the second aspect, when the pillar member is erected, the height level of the base on which the pillar member is to be erected is adjusted, and then the base member is laid on the base. It is characterized by erecting a column member.

[0011] The invention according to claim 4 is the invention according to claim 2 or 3.
In the method for constructing a skeleton according to the above, a leg protruding downward is formed at a lower end of the column member so that the concrete turns below the lower end of the column member when the concrete is poured. It is characterized by keeping.

According to a fifth aspect of the present invention, after a pillar member constituting a pillar of a skeleton is erected at a predetermined position, a beam is provided on a head of the pillar member, and an end of the beam is laterally located from the pillar member. After the beam is set to overhang, the beam is connected to another beam set on the head of another column member, and then the beam is fixed to the column member.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a skeleton structure and a method of constructing the same according to the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. Here, for example, an example in which the pillar is made of PC and the beam is made of S will be described. In these figures, reference numeral 10 denotes a column constituting a skeleton, 11 denotes a beam, and 12 denotes a foundation of the skeleton.

As shown in FIG. 1 (a), in order to construct a skeleton, first, for example, a rectangular recessed portion 13 in a plan view for forming a pillar 10 by cutting the ground is formed. Next, a formwork 14 for forming the base 12 in the recess 13 is assembled, and a base reinforcing bar 15 for integrating the lower layer and the upper layer of the base 12 is arranged in the formwork 14. Among these base reinforcing bars 15, there is a base reinforcing bar 15A used for adjusting the installation of the pillar 10, and an anchor portion 16 extending vertically upward is formed on the base reinforcing bar 15A.

[0015] As shown in FIG.
After the reinforcing bars are arranged, the concrete C1 is poured into the formwork 14 to a predetermined level. At the same time, earth and sand D are buried in the outer peripheral portion of the formwork 14. As shown in FIG. 1 (c), after the concrete C1 has hardened to form the foundation mat 12a which forms the lower layer of the foundation 12, mortar is put on the upper surface to form a base mortar (base) 17. The base mortar 17 smoothes the upper surface thereof at a level of accuracy within, for example, ± 2 mm with respect to a design value.

After the base mortar 17 has hardened, as shown in FIG.
The column member 18 that constitutes 0 is hung upright. As shown in FIG. 3, the column member 18 is made of PC which is formed in a predetermined shape in a factory or a work place near the site in advance, and has legs 19, 19 projecting downward from four corners by a predetermined size at the lower end thereof. Are formed on the top end face, for example, four beam fixing bolts 20.
Are provided so as to protrude upward. As shown in FIG. 2A, such a column member 18 is connected to the base mortar 1.
Standing in a seven shape, the legs 19, 19,
, A cavity S is formed between the base mortar 17 and the bottom of the column member 18.

Subsequently, the column member 18 set on the base mortar 17 is inserted and adjusted. This includes column members 18
Between the four beam fixing bolts 20 provided at the upper end of the base member and the anchor portions 16 of the base reinforcing bars 15A provided to extend upward from the foundation 12 on all sides thereof. Hang the wire 21. The installation adjustment wire 21 is provided with a turn buckle 22 and the length thereof can be adjusted. By adjusting the lengths of the four installation adjustment wires 21, respectively, The member 18 is inserted vertically and adjusted. At this time, the legs 19 of the pillar member 18 may be lifted from the base mortar 17, but there is no problem if two or more legs 19 are installed on the base mortar 17.

As shown in FIG. 2B, after the adjustment of the column members 18 is completed, concrete C2 is poured into the formwork 14. Then, a predetermined length of the lower end portion of the column member 18 is embedded in the concrete C2. Then, the concrete member C2 is hardened and the foundation upper layer portion 12b is formed, whereby the column member 18 and the foundation 12 are integrated. At this time, since the cavity S is formed between the base mortar 17 and the bottom of the column member 18 by the legs 19, 19,... Of the column member 18, the concrete C2 also wraps around the cavity S. Even if the column member 18 is lifted from the bale mortar 17 due to the adjustment of the installation, it can be securely joined to the foundation 12.

When the concrete C2 is hardened and the column member 18 becomes self-supporting, the construction adjusting wires 21 and
21, ... are removed.

As shown in FIGS. 4 and 5, the column members 18 are sequentially built at the positions where the respective columns 10 are to be built.

Then, the column member 1 built at a predetermined position
A beam 11 is erected on 8. First of all, a beam steel frame (beam) is placed on the column members 18, 18, ... arranged in one direction.
25 will be erected.

First, as shown in FIG. 4, a column member 18A located at one end of the frame and a column member 18 adjacent thereto are disposed.
B, a column steel frame 25A is erected. This beam steel frame 25A
Is longer than the span between the column members 18A and 18B by a predetermined dimension, and when one end thereof is positioned on the column member 18A, the other end projects from the column member 18B by a predetermined size. As shown in FIG. 6, in the column steel frame 25A, the beam fixing bolts 20 of the column members 18A and 18B are inserted into bolt holes formed at predetermined positions of the lower flange thereof, and these are temporarily fixed with the nuts 26. I do. At this time, the nut 26 is not completely tightened so that the beam steel 25A slightly moves, in order to facilitate the joining operation of the beam steel 25A to be subsequently joined with the beam steel 25A.

Next, as shown in FIG.
The beam steel 25B is set on the column member 18C adjacent to B. This beam steel frame 25B has substantially the same length as the span between the column members 18B and 18C. When one end of the beam steel frame 25B is brought into contact with the previously set beam steel frame 25A, the other end thereof becomes the column member 18B.
A predetermined dimension is projected from C. As shown in FIG. 6, this beam steel frame 25B is similar to the beam steel frame 25A.
The beam fixing bolt 20 of the column member 18C is inserted into a bolt hole formed at a predetermined position, and is temporarily fixed with a nut 26.

Then, the beam steel members 25A, 25B butted against each other at a position where they are projected from the column member 18B by a predetermined dimension.
Are joined by joining means such as a joint plate 27 and a bolt / nut 28. In this way, the beam steel 25A, 2
After joining 5B, the beam steel frame 25A is permanently fixed to the column member 18A by tightening the nuts 26.

As shown in FIG. 4, thereafter, the beam steel 25 is temporarily fixed and sequentially moved toward the other column member 18E.
By repeating the steps of joining the beam steel members 25 at positions protruding from the column members 18 by a predetermined dimension and permanently fixing the beam steel members 25, the beam steel members 25 are erected one by one.
The beam steel frame 25D bridged over the column member 18E located at the other end of the skeleton has a length such that one end is located at a position protruding a predetermined dimension from the column member 18D, and the other end is located on the column member 18E. Have.

As shown in FIG. 5, after the beam steel members 25 are erected on the column members 18, 18,... A beam steel frame 30 extending in a direction perpendicular to the direction is erected. This beam steel frame 3
0 has the same length as the span between the column members 18 as usual. As shown in FIG.
In the head of each column member 18, a joint bracket 31 integrally attached to the beam steel frame 25 erected earlier is joined by joining means such as bolts and nuts 32. The lower flange 30a and the web 30b at the end of each beam steel frame 30 have column members 18 attached thereto.
A notch 33 is formed to avoid interference with the upper end portion.

As shown in FIG. 5, after the completion of the installation of the beam steel structure 30, small beams 35, 35 extending perpendicularly to the beam steel structures 30, 30 adjacent to each other are installed between the adjacent beam steel structures 30, 30, thereby forming the frame. Is completed for one floor. Thereafter, a roofing material or a ceiling material (not shown) may be provided on the erected beam steel frames 25, 30 and, if necessary, the above operation may be repeated to build up the second or higher floor of the skeleton.

By the way, in the above configuration, if the level error of the base mortar 17 at the time of construction is ± 2 mm and the dimensional error of the length of the column member 18 itself is ± 2 mm, these errors are concentrated on the head of the column member 18. Will be done. At this time, consider a case where the error is maximized in the column members 18 adjacent to each other.

First, as shown in FIG. 8A, the error (tolerance) of the head of the column member 18 located on the left side in the figure is +2 mm in the base mortar 17 (see FIG. 1), and the column member 18
The dimensional error of itself is +2 mm, and the total is +4 mm (the maximum error on the plus side). The error of the head of the column member 18 located on the right side in the figure is -2 mm in the base mortar 17,
If the dimensional error of the head itself is −2 mm, and the total is −4 mm (minus side maximum error), the head level difference between the left pillar member 18 and the right pillar member 18 is 8 mm. At this time, the beam steel frame 2 protruding greatly from the right column member 18
In No. 5, the tip portion 25a bends downward due to its own weight. The bending amount δ is expressed as follows: δ = ω · L ⁴ / (8 · E · I), where ω: uniform distribution load, L: span, E: Young's modulus, I: second moment of area. Here, assuming that ω = 90 kg / m, the overhang span L of the beam steel member 25 from the column member 18 is 850 cm, the size of the beam steel member 25 as an H-section steel is H−500 × 200, and the second moment of area I = 47000 cm ⁴ , δ = about 6 mm. Then, at the joint between the left beam steel frame 25 and the right beam steel frame 25 in the figure, the vertical beam steel frames 25
Is a maximum of 14 mm.

On the other hand, as shown in FIG. 8B, the error (allowable error) of the head of the column member 18 located on the left side in the figure is -2 mm in the base mortar 17 (see FIG. 1), and
The dimensional error of itself is −2 mm, the total is −4 mm (minus side maximum error), and the error of the head of the column member 18 located on the right side in the drawing is +2 mm in the base mortar 17 and the column member 1
When the dimensional error of the 8 itself is +2 mm and the total is +4 mm (maximum error on the plus side), the level difference between the heads of the left column member 18 and the right column member 18 is 8 mm, and the right beam steel frame 25 in the figure. Is about 6 mm at the distal end portion 25a, so that the level difference at the joint between the left and right beam steel frames 25, 25 is 2 mm at the maximum.

In this way, the level difference between the beam steel members 25, 25 joined at the position where they are extended by a predetermined dimension from the column member 18 is at most about 14 mm. After joining the beam members 25 to each other, the beam steel members 25 are permanently fixed to the column members 18, thereby joining the beam steel members 25 to the column members 18 and the beam steel members 25, 25.
The joining between the members can proceed without any problem.

As described above, after the column member 18 is hung on the base mortar 17 and erected, the column member 18 is adjusted for installation, and in this state, concrete C2 is poured into the lower end of the column member 18. The column member 18 is fixed, and after that, a beam steel frame 25 is erected on the head of the column member 18.
In this way, the lower end of the column member 18 is
By embedding and fixing in the concrete 2, there is no need to use rigid joints and pin joints as in the past, and anchor bolts are not required. It can be performed very easily only by the step of casting.

Moreover, the concrete member C2 is cast at the lower end portion of the column member 18 in a state where the column member 18 is adjusted and set, and the column member 18 can be built with high accuracy. In addition, by using the base reinforcing bar 15 of the base mat 12a constituting the base 12 of the column member 18 as an anchor at the time of adjusting the installation, there is no need to separately install a member or the like for adjusting the installation. In this respect, the construction can be facilitated.

After adjusting the height level on the base mat 12a by the base mortar 17, the column member 18 is erected. As a result, the level adjustment at the capital of the column member 18 can be made unnecessary, and the scaffolding and the like become unnecessary, so that labor can be largely saved,
Easy and efficient construction can be achieved.

Further, by forming the leg portion 19 at the lower end of the column member 18, the concrete C2 surely goes under the column member 18 when the concrete C2 is cast. The lower surface of the base member 12 can be securely brought into close contact with the base mortar 17 on the base mat 12a without any gap on the lower surface of the base member 12, and therefore the vertical force acting on the column member 18 can be transmitted to the lower base 12 reliably and efficiently. It becomes possible.

When the beam 11 is erected, the end of the beam steel member 25 is set on the head of the column member 18 so as to project laterally from the column member 18, and then the beam steel member 25 and other members are set. The beam steel frame 25 is connected, and after that, the beam steel frame 25 is permanently fixed to the column member 18. By connecting the beam steel 25 temporarily in this manner, it is possible to absorb the level error of the base mortar 17, the dimensional error of the column member 18 itself, and the like. Moreover, since the deflection of the overhang portion of the beam steel frame 25 can also be used,
The dimensional error can be more easily absorbed.

It is to be noted that each of the configurations described in the above-described embodiment can employ any other configuration without departing from the gist of the present invention. For example, as for the base mortar 17, if the level of the position where the column member 18 is erected can be adjusted, for example, a point-like material such as a bolt, a planar material such as a liner iron plate, or a paste-like resin is leveled. Others such as cured ones can be employed as appropriate. Further, the leg 19 of the column member 18 may be formed of another material such as a metal, for example, as long as the concrete C2 can be wrapped under the entire area of the column member 18. The number, position, etc. may be changed. Of course, the shape and length of the leg 19 may be optimal depending on the filler used, the filling method, and the like. Although the beam fixing bolt 20 is provided on the head of the column member 18, the column member 18 and the beam steel frame 25 are welded, bonded,
If it is to be joined by other joining means such as concrete winding or the like, an appropriate one may be provided. Also, at the head of the column member 18, the level may be adjusted with a liner iron plate, leveling mortar, or the like.

Further, regarding the concrete C2 for fixing the lower end of the column member 18, in the above embodiment,
Although the recess 13 is formed in the ground, the concrete C2 may be cast so as to be wound around the lower end of the column member 18, for example. Further, in place of the concrete C2, another material such as a resin may be used as long as the required strength can be secured. In addition, although the embedding formwork for embedding the formwork 14 for casting the concrete C2 is used as it is, of course, it can be diverted. Further, the area in which the concrete C2 is cast does not necessarily need to be adjusted to the foundation mat 12a, and may be smaller.

In addition, in the above embodiment, the foundation mat 12a is formed of concrete C1, but for this, for example, a precast concrete member or a plate material such as an iron plate can be used. Further, if there is sufficient ground strength, rock, improved ground, or the like may be used.

In the above embodiment, the column member 18 is connected to the installation adjusting wire 21 having the turnbuckle 22.
However, other devices such as jacks and supports may be used. In addition, the installation adjustment wire 21 may be applied to a portion other than the beam fixing bolt 20, for example, a main body of the column member 18,
Alternatively, a bracket or the like attached to the column member 18 separately from the beam fixing bolt 20, or a concave portion or the like formed for hanging the installation adjustment wire 21 on the column member 18 may be used. Of course, the joining order of the beam steel members 25 is not limited to the above-mentioned order, and may be another order such as, for example, sequentially extending from the center to both sides.

Further, in the above embodiment, the pillar 10 is
The beam 11 is made of steel, but is not limited to this. For example, the pillar 10 is made of RC, P
The C pile, the steel frame, the wooden structure, and the beam 12 may be a PC structure, a wooden structure, or the like.

Other than this, any configuration may be adopted as long as it does not depart from the gist of the present invention, and it is needless to say that the above-described configurations may be appropriately selectively combined. No.

[0043]

As described above, according to the skeleton structure according to the first aspect and the method for constructing the skeleton according to the second aspect, after the column member is erected at a predetermined position, the column member is constructed. In this state, concrete is cast at the lower end of the column member to fix the column member, and then a beam is erected on the head of the column member. By embedding and fixing the lower end of the column member in concrete in this way, it is possible to fix without using a conventional rigid joint or pin joint, and it is also possible to eliminate the need for anchor bolts. Construction of the column member can be easily performed.
In addition, the concrete can be cast at the lower end of the pillar member in a state where the pillar member is adjusted for installation and solidified, so that the pillar member can be built with high accuracy. In addition, by performing the installation adjustment using the foundation itself as an anchor, there is no need to separately install a member or the like for the installation adjustment, and in this respect, the construction can be facilitated.

Further, according to the method of constructing a skeleton according to the third aspect, the height of the base on which the column member is to be erected is adjusted using the base mortar, the liner iron plate, or the like, and then the column member is erected. . As a result, the level adjustment at the capital can be made unnecessary, and assembling of the scaffolding becomes unnecessary, so that labor can be largely saved, and the construction can be facilitated and efficiency can be improved.

Further, according to the method for constructing a skeleton according to the fourth aspect, a leg projecting downward is formed at the lower end of the column member, and the leg is formed below the column member when the concrete is poured. It is configured to allow concrete to rotate. Accordingly, the entire lower surface can be securely brought into close contact with the foundation without forming a gap on the lower surface of the column member, so that the vertical force acting on the column member can be transmitted reliably and efficiently downward.

According to the method of constructing a skeleton according to claim 5, after setting the end of the beam on the head of the column member erected at a predetermined position by projecting the end of the beam sideways from the column member. Then, this beam is connected to another beam, and thereafter, the beam is fixed to the column member. In this way, by setting the beam and joining it with other beams without fully fixing it,
A dimensional error such as a step at a joint between beams caused by the accuracy of the column member can be absorbed, and the work can be easily performed. Further, by joining the beams at positions protruding laterally from the column member, it is possible to utilize the bending of the overhang portion of the beam, and in this respect, the above-described dimensional error can be more easily absorbed. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a skeleton structure and a method of constructing the skeleton according to the present invention, and is a process diagram showing a procedure for constructing pillars constituting the skeleton.

FIG. 2 is a process drawing following FIG. 1;

FIG. 3 is a perspective view showing a pillar member used for the pillar.

FIG. 4 is an elevation view showing the skeleton.

FIG. 5 is a plan view of the same body.

FIG. 6 is an elevation view showing a joint structure between a column and a beam constituting the skeleton.

FIG. 7 is a side view showing a joint structure between the column and another beam.

FIG. 8 is a view showing a joint portion of the beam.

FIG. 9 is a process chart showing an example of a conventional method of building a skeleton.

[Explanation of symbols]

 10 pillar 17 base mortar (base) 18 pillar member 19 leg 25 beam steel frame (beam) C2 concrete

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuya Shinmura 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation

Claims (5)

[Claims] 1. A pillar constituting a skeleton is erected by embedding a predetermined length of a lower end portion thereof in concrete, and a beam erected on a head of the pillar is laterally extended from a head of the pillar. A skeleton structure characterized by being joined to another beam at a position where it overhangs. 2. A pillar member constituting a pillar of a skeleton is set at a predetermined position, and then the pillar member is erected. In this state, concrete is poured into a lower end portion of the pillar member. , And after that, a beam is erected on the head of the column member. 3. The method for constructing a skeleton according to claim 2, wherein when the column member is erected, the height of the base on which the column member is erected is adjusted, and then the column member is erected on the base. Construction method of the skeleton. 4. The method for constructing a skeleton according to claim 2, wherein a leg projecting downward is formed at a lower end of the column member, and the lower end of the column member is formed when the concrete is cast. A method for constructing a skeleton, wherein the concrete is made to rotate under a part. 5. After a pillar member constituting a pillar of a skeleton is erected at a predetermined position, a beam is set on the head of the pillar member so that an end thereof projects laterally from the pillar member. After that, the beam is connected to another beam set on the head of another column member, and then the beam is fixed to the column member.