JPH04309630A - Skeleton construction method using pc member - Google Patents

Abstract

PURPOSE:To construct a high quality reinforced concrete building efficiently. CONSTITUTION:A collar portion is formed at the top end of a PC column type hollow frame member 10 in which auxiliary reinforcements are embedded, and the lower end surfaces of the PC beam members 22 are placed on the collar portion. Grooves 28 opened upward are formed at the ends of the PC beam members 22, and beam main reinforcements 24 are provided projectedly in the grooves 28. The column main reinforcements 34 and connecting beam main reinforcements 36 of an assembled reinforcement block 30 are inserted into the hollow portion of the PC column type frame member 10 and into the groove 28 of the PC beam member 22, and concrete is deposited with these reinforcements set as lap joints.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a column formwork member made of PC,
This invention relates to a method of constructing a frame using PC members, which is constructed using C beam members and reinforcing bars for assembly of column and beam joints.

0002

[Prior Art] Conventionally, when constructing a reinforced concrete building, first the pre-assembled column reinforcing bars for column construction were attached to the construction site, a column formwork was set to cover the column reinforcing bars, and then the concrete The pillars were constructed by pouring them, and then the precast beam members were installed.
The beam was placed so that it spanned between the constructed columns, beam reinforcing bars were installed inside the beam members, and then beam concrete was poured. The building was then constructed by performing such work on each floor. In particular, gas pressure welding has generally been used to join the column reinforcing bars on the lower floor and the column reinforcing bars on the upper floor in the panel zone, and to join the horizontally intersecting beam reinforcing bars.

0003

[Problems to be Solved by the Invention] However, in this conventional construction method, various types of reinforcing bars are joined together by pressure welding, so a plurality of reinforcing bars must be pressure welded one by one, and this pressure welding work requires a lot of effort. This lengthened the construction period, and the use of open flames posed safety concerns. In addition, this pressure welding process requires skill, and since pressure welding cannot be performed in the rain, the welding process is affected by the weather, which also lengthens the construction period.

[0004] Furthermore, since a formwork such as a plywood board is used, waste materials are generated and formwork work is also required.

Furthermore, it is necessary to use supports, etc. to hold the beam members made of semi-PC, and much labor is required to attach and remove the supports.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a method for constructing a frame using PC members, which enables efficient and high-quality reinforced concrete building construction.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention has a hollow cylindrical body having a flange at the upper end, and has splints and hoops embedded in the thick part. A PC column formwork member with a U-shaped cross-sectional groove with an open upper part at both ends, and a beam main reinforcement that projects to the column/beam joint part is exposed in the U-shaped groove. A column/beam joint assembly reinforcing bar having a beam member, a column main reinforcement inserted into the hollow part of the column formwork member attached to the corner formwork, and a connecting beam main reinforcement inserted into the U-shaped groove of the beam member. A block is manufactured in advance, and then the column form frame member is built in so as to cover the existing column main reinforcement, and then the beam member is laid across the flanges of the column form member, and then, The assembled reinforcing bar block is placed on the upper part of the column form frame member, and its main column reinforcement is inserted into the hollow part of the column form frame member and overlapped with the splint reinforcement, and the connecting beam main reinforcement is inserted into the column form frame member. The concrete is inserted into the U-shaped groove and overlapped with the beam main reinforcement, and then concrete is poured into the hollow part of the column form member, the U-shaped groove of the beam member, and the column/beam joint.

Further, the present invention is characterized in that the column/beam joint assembly reinforcing bar block includes a steel frame material inserted into the U-shaped groove of the beam member.

[0009]

[Function] To describe the function of the present invention, the members constituting the columns, beams, and column/beam joints that make up reinforced concrete buildings can be prepared in advance as units of PC members and prefabricated reinforcing bars that can be used as structural materials as they are. Since they are produced in a factory and transported to the construction site for construction work, construction can be carried out efficiently. In particular, unlike when constructing a formwork using plywood, no waste material is generated, and no formwork is required, resulting in resource and labor savings, and also eliminates the need for demolding work. You can also do that. Furthermore, since the column frame members are made of PC members and are lightweight, there is no need for a large-capacity lifting machine or the like when transporting or erecting these members at the construction site.

[0010] Also, regarding the mutual connection of reinforcing bars, for the main reinforcement of the column, splice reinforcement is buried in the column form frame member and the splint reinforcement and the main reinforcement of the column constitute a lap joint structure, and for the main reinforcement of the beam, , the beam main reinforcement is exposed in the U-shaped groove at both ends of the beam member, and the beam main reinforcement and the connecting beam main reinforcement of the column/beam joint assembly reinforcing block are configured to form a lap joint structure, so that the overlap between the column main reinforcement In addition, stress transmission between columns and beams can be achieved by these lap joint structures. Therefore, regarding the column main reinforcements, the mutual connection between the column main reinforcements can be made into a simple butt-butting structure. Furthermore, sufficient seismic performance can be exhibited between the columns and beams. With this configuration, the number of press-welded parts can be reduced and construction can be completed efficiently and in a short period of time. In addition, it is safer because the number of places where fire is used can be reduced, and it is less affected by the weather.

Furthermore, the building constructed according to the present invention has a so-called rigid frame structure, and in this case, short-term stress such as that caused by an earthquake will be greatly applied to both ends of the beam. In addition, by providing a steel frame material that is inserted into the U-shaped groove of the beam member, it is possible to exhibit excellent resistance against such short-term stress.

Furthermore, when connecting the PC beam member to the PC column form member, the PC beam member can be supported by being placed on the collar of the PC column form member. Therefore, P.C.
Other support members, such as shoring, are not required to support the beam member, and extra labor for attaching and removing the shoring can be eliminated.

[0013]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. That is, FIGS. 1 to 4 are explanatory diagrams showing one embodiment of the framework construction method according to the present invention in order, and FIG.
6 is an enlarged perspective view of the main part of the PC beam member, and FIG. 7 is a perspective view of the reinforcing bar block for assembling the column/beam joint.

FIG. 1 shows the process of erecting a column frame member 10 made of PC at a predetermined position. As shown in FIG. 5, this PC column frame member 10 is manufactured as a hollow cylinder with a rectangular cross section by centrifugal molding, for example, and has a plurality of auxiliary supports arranged in the length direction within its wall thickness. A plurality of hoops 14 are embedded surrounding the outer side of the reinforcement reinforcement 12 and arranged at equal intervals in the length direction. In addition, the PC column frame member 10
When manufacturing the column frame member 10 made of PC, a flange portion 16 is integrally formed at the upper end portion of the column frame member 10. The PC column frame member 10 is manufactured in advance at a factory or the like, and is transported to the site and suspended using a crane or the like and erected.

By the way, a plurality of column main reinforcements 20 are erected from the floor slab 18 at the position where the PC column form frame member 10 is to be erected, and the PC column reinforcements 20 are placed over the outside of the existing column main reinforcements 20. The formwork member 10 is erected. In addition, the floor slab 1
The length of the column main reinforcement 20 erected from 8 is approximately half the length of the column frame member 10 made of PC. Also,
As is generally done in the erection of the PC column form member 10, the PC column form member 10 is held by the shoring H until the final concrete placing step is completed and the concrete hardens. .

FIG. 2 shows the process of extending the PC beam member 22 over the PC column frame member 10. This PC beam member 2
2 is manufactured by precasting in a factory or the like, with main beam reinforcements 24 arranged in the length direction and stirrups 26 arranged in the circumferential direction buried therein. Incidentally, the upper end portion of the stirrup 26 partially protrudes from the upper side of the PC beam member 22.

By the way, as shown in FIG. 6, both ends of the PC beam member 22 are formed with grooves 28 having a U-shaped cross section and open at the top. It is projected and exposed. When the PC beam member 22 is stretched over the PC column frame member 10, this P
The lower sides of both ends of the C beam member 22 are placed on the flange 16. Incidentally, spiral reinforcements 29 are attached to the beam main reinforcements 24 that protrude into the groove portion 28 so as to surround the beam main reinforcements 24, and in this step, the spiral reinforcements 29 are bundled at the base side of the beam main reinforcements 24 that protrude. be.

FIG. 3 shows that columns and
The process of arranging the beam joint assembly reinforcing bar blocks 30 is shown. As shown in FIG. 7, the assembled reinforcing bar block 30 has a rectangular corner frame 32 made of iron plate placed in the center,
Column main bars 34 projecting in the vertical direction on this corner formwork 32
The connecting beam main reinforcing bars 36 projecting in the direction in which the PC beam members 22 are arranged are fixedly installed.

Then, the assembled reinforcing bar block 30 is suspended by a crane or the like, and the lower part 34a of the column main reinforcement 34 is inserted into the hollow part S of the PC column form member 10 from above, and the column main reinforcement 34a and the PC The support reinforcements 12 embedded in the column form member 10 are overlapped with each other. Also, the connecting beam main reinforcement 36 of the assembled reinforcing bar block 30 is inserted into the groove 28 of the PC beam member 22 from above, and the connecting beam main reinforcement 36 and the beam main reinforcement 24 protruding into the groove 28 are overlapped with each other. do.

By the way, the connecting beam main reinforcement 36 is connected to the beam main reinforcement 2.
4, the spiral reinforcements 29 bundled on the base side of the beam main reinforcements 24 are pulled out to surround the overlapping portion of the beam main reinforcements 24 and the connecting beam main reinforcements 36.

FIG. 4 shows a connection portion between the assembled reinforcing bar block 30, the PC column form member 10, and the PC beam member 22.
The process of pouring concrete 38 is shown. That is, in this concrete pouring process, the hollow part S of the PC column form member 10 into which the column main reinforcement 34a of the assembled reinforcing bar block 30 is inserted, and the groove part of the PC beam member 22 into which the connection beam main reinforcement 36 is inserted. Concrete 38 is placed at 28. By the way, by placing the concrete 38 in this way, a lap joint is formed at the overlapping part of the column main reinforcement 34a and the splice reinforcement 12, and a lap joint is formed at the overlap part between the beam main reinforcement 24 and the connecting beam main reinforcement 36. Configure a lap joint.

When pouring the concrete, concrete for the floor slab 18 is simultaneously poured on the upper surface of the PC beam member 22 to construct the floor. Therefore, the upper part 34b of the column main reinforcement 34 of the assembled reinforcing bar block 30 will be erected from the floor slab 18, and the column main reinforcement 34b will have P
By covering the column frame member 10 made of C, the columns on the upper floor are built. Then, by carrying out each of the above steps, the upper floors can be constructed in sequence.

Therefore, in this embodiment, the members 10 and 22 made of PC, which can be used as structural materials as they are, and the members composing the columns, beams, and column/beam joints constituting a reinforced concrete building, and the assembly. Since the reinforcing bar blocks 30 are manufactured in advance as units in a factory and transported to the construction site for construction work, construction can be carried out efficiently. In particular, unlike when constructing a formwork using plywood, no waste material is generated, and there is no need for formwork, so resource and labor savings can be achieved.
Moreover, demolding work can also be made unnecessary. Further, since the column frame member 10 is a PC member and is lightweight, there is no need for a large-capacity lifting machine or the like when transporting or erecting these members at the construction site.

[0024] Also, regarding the mutual connection of reinforcing bars, for the main column reinforcements, the splice reinforcements 12 are buried in the column form frame member 10, and the splint reinforcements 12 and the column main reinforcements 20, 34 form a lap joint structure. , Also regarding the beam main reinforcement, the beam member 22
The beam main reinforcements 24 are exposed in the grooves 28 at both ends, and the beam main reinforcements 24 and the connecting beam main reinforcements 36 of the column/beam joint assembly reinforcing bar block 30 constitute a lap joint structure, so that the overlap between the column main reinforcements In addition, stress transmission between columns and beams can be achieved by these lap joint structures. Therefore, regarding the column main reinforcements, the connection between the column main reinforcements 20 and 34 can be made into a simple butt structure. Furthermore, sufficient seismic performance can be exhibited between the columns and beams. With this configuration, the number of press-welded parts can be reduced and construction can be completed efficiently and in a short period of time. In addition, it is safer because the number of places where fire is used can be reduced, and it is less affected by the weather.

[0025] PC beam member 2 is placed between PC column frame member 10.
2, the beam member 22 is placed on the flange 16 protruding from the upper end of the column frame member 10, and the beam member 22
can be supported by the column frame member 10 itself. Therefore, there is no need to temporarily fix the beam member using a support member such as a shoring structure in order to span the beam member as in the conventional case. Therefore, the labor required for attaching and detaching the support member can be eliminated.

On the other hand, the part where concrete 38 is poured into the PC beam member 22 does not cover the entire length of the PC beam member 22, but only the grooves 28 formed at both ends of the PC beam member 22. By reducing the amount of concrete placed, the construction period can be shortened accordingly.

Incidentally, although the above-mentioned column/beam joint assembly reinforcing bar block 30 uses rod-shaped reinforcing bars as the connecting beam main reinforcements 36, the present invention is not limited to this. It is possible to use one formed as a steel reinforced block. In this way, the building constructed according to this embodiment is a so-called rigid frame structure, and short-term stress such as that caused by an earthquake will be largely applied to both ends of the beam. Since steel frames are used for the connections, it can exhibit excellent resistance to such short-term stress.

[0028]

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects. (1) Columns, beams, and members constituting the column/beam joints that make up reinforced concrete buildings are produced in advance in factories as units of PC members and prefabricated reinforcing bars that can be used as structural materials as they are. Since the construction work can be carried out by bringing it to the construction site, construction can be carried out efficiently. In particular, unlike when constructing a formwork using plywood, no waste material is generated, and no formwork is required, resulting in resource and labor savings, and also eliminates the need for demolding work. You can also do that. Furthermore, since the column frame members are made of PC members and are lightweight, there is no need for a large-capacity lifting machine or the like when transporting or erecting these members at the construction site. (2) Also, regarding the connection of reinforcing bars, for the main reinforcement of the column, a support reinforcement is buried in the column form frame member and the support reinforcement and the main reinforcement of the column form a lap joint structure, and for the main reinforcement of the beam, , the beam main reinforcement is exposed in the U-shaped groove at both ends of the beam member, and the beam main reinforcement and the connecting beam main reinforcement of the column/beam joint assembly reinforcing block are configured to form a lap joint structure, so that the overlap between the column main reinforcement In addition, stress transmission between columns and beams can be achieved by these lap joint structures. Therefore, regarding the column main reinforcements, the mutual connection between the column main reinforcements can be made into a simple butt-butting structure. Furthermore, sufficient seismic performance can be exhibited between the columns and beams. With this configuration, the number of press-welded parts can be reduced and construction can be completed efficiently and in a short period of time. In addition, it is safer because the number of places where fire is used can be reduced, and it is less affected by the weather. (3) When connecting a PC beam member to a PC column form member, the PC beam member can be supported by being placed on the collar of the PC column form member. Therefore, other support members such as shoring are not required to support the PC beam member,
This eliminates the extra labor required to install and remove the support. (4) Furthermore, the building constructed according to the present invention is a so-called rigid frame structure, and in this case, short-term stress such as that caused by an earthquake will be greatly applied to both ends of the beam. In addition, by providing a steel frame material that is inserted into the U-shaped groove of the beam member, it is possible to exhibit excellent resistance against such short-term stress.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a process of erecting a column frame member made of PC at a predetermined position in the present invention.

FIG. 2 is an explanatory diagram showing a step of spanning a PC beam member to a PC column frame member in the present invention.

FIG. 3 is an explanatory diagram showing a step of arranging assembled reinforcing bars in the hollow part of the PC column form member and the groove part of the PC beam member in the present invention.

FIG. 4 is an explanatory diagram showing the process of pouring concrete at the connection portion between the assembled reinforcing bar block, the PC column form member, and the PC beam member in the present invention.

FIG. 5 is a plan cross-sectional view showing a PC column frame member used in the present invention.

FIG. 6 is an enlarged perspective view showing the end structure of the PC beam member used in the present invention.

FIG. 7 is an enlarged perspective view of an assembled reinforcing bar block used in the present invention.

[Explanation of symbols]

10 PC column formwork members
12 Splint 16 Flange
18 Floor slab 20
Column main reinforcement
22 PC beam member 24 Beam main reinforcement
28 Groove 30 Assembly reinforcing bar block
34 Column main reinforcement 36 Connecting beam main reinforcement 3
8 Concrete

Claims (2)

[Claims] Claim 1: A PC formed into a hollow cylindrical shape with a flange at the upper end, and with splints and hoops embedded in the thick wall part.
A PC beam having a column formwork member and a U-shaped groove in cross section with an open upper part at both ends, and a beam main reinforcement that projects to the column/beam joint part is exposed in the U-shaped groove. A column/beam joint assembly reinforcing bar block having a member, a column main reinforcement inserted into the hollow part of the column formwork member attached to the corner formwork, and a connecting beam main reinforcement inserted into the U-shaped groove of the beam member. The above-mentioned column form frame members are manufactured in advance, and then the above-mentioned column form frame members are placed over the existing column main reinforcements, and then the above-mentioned beam members are laid across the flanges of the above-mentioned column form members, and then the above-mentioned An assembled reinforcing bar block is placed on the upper part of the column form frame member, and its main column reinforcement is inserted into the hollow part of the column form frame member and overlapped with the splint reinforcement, and the connecting beam main reinforcement is inserted into the U of the beam member. A PC characterized in that the concrete is inserted into the groove and overlapped with the beam main reinforcement, and then concrete is poured into the hollow part of the column form member, the U-shaped groove of the beam member, and the column/beam joint part. A method of constructing a frame using manufactured parts. 2. The PC member according to claim 1, wherein the column/beam joint assembly reinforcing bar block includes a steel frame material inserted into the U-shaped groove of the beam member. Framework construction method.