KR20100089255A

KR20100089255A - Construction method of building with precast concrete member

Info

Publication number: KR20100089255A
Application number: KR1020090008429A
Authority: KR
Inventors: 료헤이 구로사와
Original assignee: 구로사와 겐세츠 가부시키가이샤
Priority date: 2009-02-03
Filing date: 2009-02-03
Publication date: 2010-08-12

Abstract

The present invention makes it possible to construct a plurality of spans by reducing an indeterminate secondary stress in the introduction of prestress, and shortens the construction period. Precast concrete beams 2, 3... Which have been pre-stressed in advance are hypothesized between the precast concrete pillars 1, and one of these precast concrete beams 2, 3... Alternatively, tension is fixed every plural spans.

Description

Construction method of building by precast concrete member {CONSTRUCTION METHOD OF BUILDING WITH PRECAST CONCRETE MEMBER}

The present invention relates to a building construction method by precast concrete members.

In general, building construction of a plurality of spans using precast concrete members is provided with a precast concrete pillar 30 provided with beam support jaws 20 at appropriate intervals, as shown in FIG. 15. After preliminary construction of the precast concrete beam 40 between these pillars 30 and filling joint mortar between the joints thereof, the pillars 30 and the beam 40 are connected to the continuous PC steel wire ( It was constructed by joining together by a line 50.

However, as described above, the method of constructing a building by integrally joining the filler and the beam with a continuous PC steel wire introduces the prestress at once from the first filler to the last filler, so that the amount of friction loss and the axial deformation of the prestress is introduced. Positive As the secondary stress increased, the design of both pillars became difficult, and only three to four spans of buildings became the limit, and it was difficult to construct buildings of a plurality of spans.

In addition, this method cannot tension the joint mortar of the beam at the last span, so that the filler and the beam become a simple support state of the cantilever beam for a long time until the introduction of the prestress. There was also a problem of lack of safety due to instability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to reduce the negative secondary stress in the introduction of prestress, thereby making it possible to construct a plurality of span buildings, and to shorten the construction period. This is to increase the safety against horizontal forces such as wind power during construction.

The gist of the construction method of the building by the precast concrete member of the present invention for achieving the above object is to install a plurality of precast concrete pillars with protruding beam support jaws at appropriate intervals, Precast pre-stressed precast concrete beams are provided between the beam support jaws, and these precast concrete beams are tension-bonded in succession through the filling material by tension members at each span, and the beam support jaws protrude. Precast concrete pillars are installed in large numbers at appropriate intervals, and precast concrete beams pre-stressed beforehand are installed between the beam supporting jaws of these precast concrete pillars, and the precast concrete beams are tensioned for each of a plurality of spans. In turn through the filling material Tension is in bonding.

Therefore, as described above, by pre-tensioning the precast concrete beams interposed between the beam supporting jaws of the respective precast concrete pillars with a tension member for each span or a plurality of spans, the indeterminate secondary stress in the introduction of the prestress. Since it can be made small, building construction of a plurality of spans becomes possible. In addition, since a ramen structure is constructed by sequentially tensioning one span or a plurality of spans, safety can be dramatically increased for horizontal forces such as wind power and seismic force during construction.

Hereinafter, an embodiment of a building construction method using a precast concrete member of the present invention will be described in detail with reference to the drawings.

1 is a conceptual diagram showing a construction method of a building according to the first invention, wherein a precast concrete filler 1 (hereinafter referred to simply as a filler) having a beam supporting jaw 1a protruding from the foundation concrete 6 is shown. A large number is installed, and the 1st and 2nd precast concrete beams 2 and 3 are installed between these pillars 1.

This filler 1 is fixed integrally with the steel rod 7a to the sheet block 7 on the foundation concrete 6, and is prestressed by the PC steel rod 6a which was previously inserted, and the filler (1), the sheet block 7 and the foundation concrete 6 are integrated. Moreover, the filler 1 is provided with the insertion hole 1b for tension steel materials.

The first and second precast concrete beams 2 and 3 are pre-stressed by primary tension steels 2a and 3a in advance, and an insertion through hole 2b penetrating the upper surface above and below the joint end. Equipped.

Next, as shown in FIG. 2, the tension steel 8 is placed over the insertion through hole 2b at one joining end of the first precast concrete beam 2 and the insertion through hole 1b of the filler 1. ) Is inserted, and only one joint end of the first precast concrete beam 2 is joined by tension fixing at the end. In this state, the other end of the first precast concrete beam 2 is in a free state that can move only in the axial direction.

Next, as shown in FIG. 3, the insertion through hole 2b and the filler 1 and the second precast concrete beam 3 at the other joining end of the first precast concrete beam 2 are formed. The other end and the second precast concrete of the first precast concrete beam 2 are inserted by inserting the tension steel 8 over the insertion through hole 3b at one joint end and tension-fixing it at the end. One bonding end of the beam 3 is tension-bonded to the pillar 1. In this state, the first precast concrete beam 2 is completely joined to both pillars 1, but the other end of the second precast concrete beam 3 is in a free state that can move only in the axial direction as described above. .

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

Next, as shown in FIG. 6, two precast concrete beams 9 are also hypothesized between the pillars 1, and they are joined in order by the method similar to the above.

As shown in Figs. 7A and 7B, the PC floor plate 13 is mounted on the same time as the temporary surfaces of the precast concrete beams 2, 3.

And this joining is used for joining in the beam-to-beam direction and the purlin row direction, and after this joining is completed, the composite slab integrated with the beam by pouring the top concrete 14 on the PC base plate 13 is completed. (15) is formed.

Then, another pillar is connected on the pillar 1 and the precast concrete beams are tension-bonded in sequence in the same manner as described above, whereby a multi-story building is constructed with a plurality of spans.

8A, 8B and 8C show another embodiment of the first invention, and FIG. 8A shows a joining method in the case where the precast concrete beams 2 and 3 are large, and the joining ends of the three tension steels 8 ), And in the case of Fig. 8B, the joint ends are joined to the side surfaces of the precast concrete beams 2 and 3.

In addition, in the case of FIG. 8C, one joining edge part of the 1st precast concrete beam 2 and the 2nd precast concrete beam 3 is joined simultaneously.

Next, the Example of 2nd invention is described with reference to FIG.

This is the same as that of the first invention, in which a plurality of pillars 1 on which the beam supporting jaws 1a are protruded are placed upright on the foundation concrete 6, and a first prestress is applied between the pillars 1 in advance. , Second and third precast concrete beams 2, 3, 4 are hypothesized.

And as shown in FIG. 10, the 1st tension steel 10 is routed through the 1st and 2nd precast concrete beams 2 and 3 to one junction end of the 3rd precast concrete beam 4, and so on. By tension fixing, the first and second precast concrete beams 2 and 3 are temporarily joined, and the third precast concrete beam 4 is freely movable in the other end only in the axial direction. Temporarily join.

This 1st tension steel 10 is the 3rd pillar 1e via the beam support jaw 1a of the 2nd pillar 1d from the upper part of the beam support jaw 1a in the 1st filler 1c. In the upper part of the beam support tuck 1a.

Next, as shown in FIG. 11, the 2nd tension steel 11 penetrates the 1st precast concrete beam 2, wires to one junction end of the 2nd precast concrete beam 3, and is tension-fixed. , The first precast concrete beam 2 is bonded together.

12, the 2nd 1st tension steel 10a is made to penetrate the 2nd and 3rd precast concrete beams 3 and 4 similarly to the above, and 4th precast concrete beam 5 is carried out. By wiring to one end of the joint and tension-fixing, the first and second tension steels 10, 10a, and 11 are interconnected in a cross shape so that the second precast concrete beam 2 is bonded to the third precast concrete beam. (4) is also temporarily joined, and the fourth precast concrete beam 5 is temporarily joined so that the other end is free to move only in the axial direction.

In this manner, the precast concrete beams 2 and 3 are joined in two span units, and as shown in FIG. 13, another precast concrete beam 12 is interposed between the pillars 1 and the second The second tension steels 11a are wired and tensioned to join them in turn.

In addition, this joining method is also used for joining in the beam direction and in the purlin row direction. As described above, after completion of the joining, the PC bottom plate 13 is laid on the upper surface of the precast concrete beam, and the top concrete 14 is placed thereon. ) To form a composite slab 15 integral with the beam. A plurality of span and multi-storey buildings are constructed by connecting other fillers on the filler 1 and tension-bonding the precast concrete beams sequentially in the same manner as described above.

FIG. 14 shows another embodiment of the second invention, wherein in addition to the first and second tension steels 10, 10a, 11, 11a, the third tension steel 16 is formed of the precast concrete beams 2, 3... It is provided at the joint end.

By prestressing precast concrete beams preliminarily prestressed for one span or a plurality of spans, it is possible to reduce the indefinite secondary stress in the introduction of prestresses, so that the building of a plurality of spans can be easily constructed.

Since precast concrete beams pre-stressed beforehand are tension-settled for one span or multiple spans, it is not necessary to wait for introduction of prestresses until the shortest joint mortar hardens, thereby reducing construction period and The safety against horizontal forces, such as wind power, can be improved.

1 is a front view illustrating a state in which first and second precast concrete beams are installed between precast concrete pillars.

FIG. 2 is a front view showing a state where tension is fixed at one joint end of the first precast concrete beam. FIG.

3 is a front view showing a state in which both of the joint ends of the first precast concrete beam and one of the joint ends of the second precast concrete beam are tension-fixed.

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

5 is a plan view of FIG. 4.

FIG. 6 is an enlarged plan view of a state in which both bonded ends of the second precast concrete beam and one bonded end of the third precast concrete beam are tension-fixed.

7A and 7B are cross-sectional views showing a synthetic slab in which a PC bottom plate is mounted on the upper surface of the beam and the top concrete is poured thereon.

8A, 8B and 8C are front views showing another embodiment of the first invention.

9 is a front view showing a state in which the first and second precast concrete beams are installed between the precast concrete pillars in the second invention.

It is a front view which shows the state which tension-fixed the 1st tension steel material.

It is a front view which shows the state which tension-fixed the 2nd tension steel material.

It is a front view which shows the state which tension-fixed the 2nd 1st tension steel material.

It is a front view which shows the state which tension-fixed the 2nd 2nd tension steel material.

14 is a front view showing a state showing another embodiment of the second invention.

15 is a front view showing a state showing a construction method of a conventional building.

Claims

Precast concrete pillars with protruding beam support jaws are installed in a plurality of spaced apart at appropriate intervals, and precast concrete is provided with prestress in advance between beam support jaws of the precast concrete pillars. A construction method for building with precast concrete members, in which a beam is hypothesized, and the precast concrete beam is tension-bonded in sequence through a filler by a tension member at every span.

Precast concrete pillars with protruding beam support jaws are installed in plural at appropriate intervals, and precast concrete beams pre-stressed with prestress are installed between beam support jaws of the precast concrete pillars, and the precast concrete A construction method of a building by precast concrete member, wherein the beam is tension-bonded in sequence through a filler by a tension member for each of a plurality of spans.