JPH06158716A - Construction method of building with precast concrete member - Google Patents

Abstract

PURPOSE:To enable the construction of a building having multi-span and to reduce p construction period by tensionning and connecting precast concrete beams successively with tendons for every span, and reducing statically indeterminate secondary stress of initial prestress. CONSTITUTION:Precast concrete columns 1 having projected joist coggings 1(a) are erected at proper intervals, and precast concrete beams 2 and 3 provided with prestress are built among them. After that, the beams 2 and 3 are successively tensioned and connected with tendons for every one or more spans. At that time, friction loss of initial prestress and statically indeterminate secondary stress caused by ring deformation are reduced, and they are successively tensioned and connected in span unit to construct moment resisting frame construction. According to the constitution, safety against wind force or earthquake force during the construction can be rapidly increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building construction method using precast concrete members.

[0002]

2. Description of the Related Art Generally, the construction of a multi-span building using precast concrete members is performed as shown in FIG.
Precast concrete columns 3 with beam receiving jaws 20
0 is erected at appropriate intervals, precast concrete beams 40 are sequentially installed between these columns 30, and joint mortar is filled between the joints, and then these columns 30 and beams 40
And were joined together by a continuous PC steel wire 50.

[0003]

However, in the method of constructing a building by integrally joining the pillar and the beam with the continuous PC steel wire as described above, the prestress is introduced from the first pillar to the last pillar at once. Therefore, the amount of friction loss due to the introduction of pre-stress and the statically indeterminate secondary stress due to axial deformation become large, making it difficult to design the columns on both sides. Building was difficult.

In addition, this method requires that the joint mortar of the beam in the last span be cured before it can be tensioned.
There is also a problem that the pillars and beams are simply supported by a cantilever beam for a long time before the introduction of prestress, which makes them unstable with respect to wind and seismic forces and lacking safety.

The present invention has been made in view of the above problems, and an object thereof is to make it possible to construct a multi-span building by reducing the statically indeterminate secondary stress in the introduction of pre-stress. It is intended to shorten the length of the work and improve the safety against horizontal force such as wind force during construction.

[0006]

[Means for Solving the Problems] A summary of the method for constructing a building using a precast concrete member of the present invention for achieving the above-mentioned object is that a large number of precast concrete columns with protruding beam receiving jaws are erected at appropriate intervals. Then, pre-stressed pre-cast concrete beams are pre-stressed between the beam receiving jaws of these pre-cast concrete columns, and these pre-cast concrete beams are tension-sequentially joined by a tension material with a tension material for each span. In particular, a large number of precast concrete columns with protruding beam receiving jaws are erected at appropriate intervals, and precast concrete beams pre-stressed between the beam receiving jaws of these precast concrete columns are installed. Then these precast concrete beams are tensioned in multiple spans. It consists in successively tensioning bonded via a more fillers.

[0007]

Thus, in the prestress introduction, the precast concrete beams erected between the beam receiving jaws of the respective precast concrete columns as described above are sequentially tension-joined with a tension member for each span or multiple spans. Since the statically indeterminate secondary stress can be reduced, it is possible to construct a multi-span building. Moreover, since the ramen structure is constructed by sequentially tension-joining each span or multiple spans, it was possible to dramatically improve safety against horizontal forces such as wind force and seismic force during construction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a building construction method using a precast concrete member according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a conceptual diagram showing a construction method of a building in the first invention, and a precast concrete column 1 in which a beam receiving jaw 1a is projectingly provided on a foundation concrete 6.
A large number of (hereinafter simply referred to as pillars) are erected, and the pillars 1
And, the second precast concrete beams 2 and 3 are installed.

This column 1 is integrally fixed to a pedestal block 7 on a foundation concrete 6 with a steel rod 7a, and is prestressed with a PC steel rod 6a which has been inserted in advance.
It is configured to be integrated with the pedestal block 7 and the foundation concrete 6. Further, an insertion hole 1b for a tensile steel material is penetrated through the pillar 1.

The first and second precast concrete beams 2 and 3 are prestressed by the primary tensile steel members 2a and 3a, and have insertion holes 2b penetrating the upper surface above and below the joint ends.

Next, as shown in FIG. 2, the insertion hole 2 at one joint end of the first precast concrete beam 2 is inserted.
Only one joint end of the first precast concrete beam 2 is joined by penetrating the tension steel material 8 between b and the insertion hole 1b of the column 1 and fixing the tension at the end.
In this state, the other end of the first precast concrete beam 2 is free to move only in the axial direction.

Next, as shown in FIG. 3, the insertion hole 2 at the other joining end of the first precast concrete beam 2
b and the insertion hole 3b at the joint end of one of the pillar 1 and the second precast concrete beam 3
Of the first precast concrete beam 2 and one of the second precast concrete beams 3 by tensioning and fixing the end of the column 1 to the column 1
Make a tight joint. In this state, the first precast concrete beam 2 is completely joined to both columns 1, but the other end of the second precast concrete beam 3 is free to move only in the axial direction as in the above.

FIGS. 4 and 5 are sectional views showing in detail a state in which the first precast concrete beam 2 is joined between columns 1 and only one joining end of the second precast concrete beam 3 is joined. .

Next, as shown in FIG. 6, two more precast concrete beams 9 are erected between the columns 1 and these are sequentially joined by the same method as described above. Note that, as shown in FIG. 7, the PC floorboard 13 is placed on the precast concrete beams 2, 3, ... This joining is used for joining in the beam-to-beam direction and the girder direction, and after the joining is completed, the top concrete 14 is placed on the PC floor board 13.
Is cast to form a composite slab 15 that is integral with the beam. A multi-span and multi-story building is constructed by connecting other columns to the columns 1 and sequentially tension-joining the precast concrete beams in the same manner as described above.

FIGS. 8 (1) to 8 (3) show another embodiment of the first invention. In the case of (1), the joining method when the precast concrete beams 2 and 3 are large is shown. The ends are joined with three tension steel members 8, and in the case of (2), the joined ends are joined with the side faces of the precast concrete beams 2 and 3. In the case of (3), it is a method of simultaneously joining the first precast concrete beam 2 and one joint end of the second precast concrete beam 3.

Next, an embodiment of the second invention will be described with reference to FIG. This is similar to the first aspect of the invention, in which a large number of pillars 1 each having a beam receiving jaw 1a protruding therefrom are erected on the foundation concrete 6, and prestressed in advance between the pillars 1. 2 and the third precast concrete beam 2,
Install 3 and 4.

Then, as shown in FIG. 10, the first tension steel material 10 is wired through the first and second precast concrete beams 2 and 3 to one joint end of the third precast concrete beam 4. By fixing the tension,
The first and second precast concrete beams 2 and 3 are temporarily joined together, and the third precast concrete beam 4 is temporarily joined so that the other end can move only in the axial direction.

The first tension steel material 10 passes from the upper part of the beam receiving jaw 1a of the first column 1c to the upper part of the beam receiving jaw 1a of the third column 1e through the beam receiving jaw 1a of the second column 1d. It is wired.

Next, as shown in FIG. 11, the second tension steel material 11 is passed through the first precast concrete beam 2 and is wired to one joint end of the second precast concrete beam 3 to fix the tension. Thus, the first precast concrete beam 2 is permanently joined.

Then, as shown in FIG. 12, one of the fourth precast concrete beams 5 is formed by penetrating the second first and third precast concrete beams 3 and 4 with the second first tension steel material 10a as described above. By wiring up to the joint end and fixing the tension, the first and second tension steel materials 10, 1
The second precast concrete beam 2 is permanently joined by wiring 0a and 11 in a cross shape, the third precast concrete beam 4 is also temporarily joined, and the fourth precast concrete beam 5 is temporarily joined and the other end is in the axial direction. Only free movement is possible.

In this way, the precast concrete beams 2 and 3 are joined in units of 2 spans, and as shown in FIG. 13, another precast concrete beam 12 is erected between the columns 1 and the second tension of the second tension is applied. The steel materials 11a are wired and tensioned to sequentially join them.

This joining method is also used for joining in the beam-to-beam direction and the girder direction, and similarly to the above, after the joining is completed, the PC floor board 13 is placed on the upper surface of the precast concrete beam.
And the top concrete 14 is placed thereon to form a composite slab 15 integrated with the beam. And
A multi-span and multi-story building is constructed by connecting other columns to the columns 1 and sequentially tension-joining the precast concrete beams in the same manner as described above.

FIG. 14 shows another embodiment of the second invention, in which the first and second tension steel members 1010a, 11 and 11 are provided.
In addition to "a", a third tension steel material 16 is provided at the joint ends of the precast concrete beams 2, 3, ....

[0024]

EFFECTS OF THE INVENTION By prestressing pre-stressed concrete beams pre-stressed for one span or a plurality of spans, the statically indeterminate secondary stress in the introduction of pre-stress can be reduced, so that a multi-span structure can be obtained. The building can be easily constructed.

Since the precast concrete beam to which the prestress has been applied is tension-fixed for each span or plural spans, it is not necessary to wait for the introduction of the prestress until the endmost mortar is hardened. The construction period can be shortened and the safety against horizontal force such as wind force during construction can be improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram in which first and second precast concrete beams are installed between precast concrete columns.

FIG. 2 is a conceptual diagram in which one joint end of a first precast concrete beam is tensioned and fixed.

FIG. 3 is a conceptual diagram in which both joint ends of a first precast concrete beam and one joint end of a second precast concrete beam are tensioned and fixed.

FIG. 4 is an enlarged cross-sectional view in which both joint ends of the second precast concrete beam and one joint end of the third precast concrete beam are tension-fixed.

FIG. 5 is a plan view of FIG.

FIG. 6 is a conceptual diagram in which both joint ends of a second precast concrete beam and one joint end of a third precast concrete beam are tensioned and fixed.

7 (1) and (2) are cross-sectional views of a composite slab in which a PC floor board is placed on the upper surface of a beam and top concrete is placed thereon.

8 (1) to (3) are conceptual views showing another embodiment of the first invention.

FIG. 9 is a conceptual diagram in which first and second precast concrete beams are installed between precast concrete columns in the second invention.

FIG. 10 is a conceptual diagram in which the first tension steel material is tension-fixed.

FIG. 11 is a conceptual diagram in which a second tension steel material is tension-fixed.

FIG. 12 is a conceptual diagram in which the second first tension steel material is tension-fixed.

FIG. 13 is a conceptual diagram in which a second second tension steel material is tension-fixed.

FIG. 14 is a conceptual diagram showing another embodiment of the second invention.

FIG. 15 is a conceptual diagram showing a conventional building construction method.

[Explanation of symbols]

 1 Precast Concrete Column 1a Beam Receiving Jaw 2 1st Precast Concrete Beam 3 2nd Precast Concrete Beam 4 3rd Precast Concrete Beam 5 4th Precast Concrete Beam 6 Foundation Concrete 7 Pedestal Block 8 Tensile Steel Material 9 Precast Concrete Beam 10 First Tension Steel material 11 Second tension steel material

Claims (2)

[Claims] 1. A plurality of precast concrete columns with protruding beam receiving jaws are erected at appropriate intervals, and prestressed precast concrete beams are pre-stressed between the beam receiving jaws of these precast concrete columns. A method for constructing a building using precast concrete members, characterized in that these precast concrete beams are sequentially tension-joined by a tension material through a filler for each span. 2. A large number of precast concrete columns with protruding beam receiving jaws are erected at appropriate intervals, and prestressed precast concrete beams are pre-stressed between the beam receiving jaws of these precast concrete columns. , A method for constructing a building using precast concrete members, characterized in that these precast concrete beams are sequentially tension-joined to each other in multiple spans with a tension material through a filling material.