JP2005139866A - Construction method for column and beam, and hollow precast concrete column form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for a column and a beam, by which the quality of a structure can be fully secured by facilitating construction in an outer frame frame structure and securing the resistance force and precision of the beam while improving the efficiency, and to provide a hollow PCa column form. <P>SOLUTION: The principal bars 2 inserted into the hollow PCa column form are connected to principal bars from a lower floor column, the hollow PCa column form is arranged, which comprises the hollow part 3-1 and a rectangular edge part 3-5 forming the hollow part and having hoop reinforcements 3-4 buried therein and is equipped with the engagement part 3-3 of a normal beam 5 formed continued to the lower part of the mounting part, the normal beam 5 being obtained by cutting off the tip end of one side orthogonally crossing with the two sides of the mounting part 3-2 of a reversed beam formed by cutting off the tip ends of the opposite two sides of the rectangular edge part, the hoop reinforcements 6 are arranged to the principal bars between the reversed beam and the column by suspending the reversed beam 4, 4 on the mounting part in a longitudinal direction to connect between the mutual reversed beam principal bars, also to engage the normal beam 5 in the beam-to-beam direction with the engagement part 3-3, the slab bar arrangement in the beam-to-beam direction and the column form are set and the beam principal bars 5-2 of the normal beam are extended to the hollow part of the hollow PCa column form. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a column and beam construction method and a hollow precast concrete column formwork, and more particularly, to a column and beam construction method and a hollow precast concrete column formwork that facilitate construction and improve efficiency in an outframe frame.

  By adopting the reverse beam method for structures such as apartment houses, storage and refrigerator are provided under the floor so that the layout of each door can be changed freely, and the view from the room is improved by eliminating the beam shape. It has been planned to expand the application range of structures, but the conventional reverse beam method is performed with joints that construct each structural member with cast-in-place concrete. In order to ensure strength, ensure accuracy, etc., there were various problems as pointed out below in terms of quality control and process control compared to the forward beam method.

1) It is necessary to install floor boards and beams at the same time so that horizontal joints do not occur.
2) The side formwork becomes a floating formwork, and it is necessary to secure the accuracy of erection and passing.
3) It takes a lot of work days to assemble the formwork.
4) Skilled workers are required for placing concrete.

  And many proposals about the construction method of a reverse beam are made in order to solve these basic problems. The present applicant has already proposed an improvement plan for the floating formwork (Japanese Patent Application No. 2002-373339). In addition to this, in the reverse beam construction method shown in FIG. The beam 22 is made of precast concrete (hereinafter referred to as PCa), and the beam-to-beam direction beam 21 is placed on the top of the column 23 that has already been placed to the lower end of the beam, and then the beam-direction beam 22 is After the installation, the upper main bar 24 of the beam 21 between the beams and the anchor bar 25 for fixing in the column to be inserted at the site are connected, and then the upper notch of the beam end of the beam between the column and the beam and the beam between the beams is connected. Since the cast-in-place concrete is cast in the joints with the beam, beam direction beam / beam joints and peripheral fixed floor boards, it is possible to avoid the troublesome assembly of the floating formwork and difficult concrete placement, and the beam. Erection and communication In addition, since the horizontal joint of the concrete does not occur in the beam, it is assumed that sufficient strength can be secured. For the beam between beams, a notch is provided in the upper part of the beam end, and the upper end main bar extends to the front of the column. However, it is said that the beam can be dropped in the beam direction, so that the joint work at the column / beam joint can be greatly reduced. (For example, see Patent Document 1)

  However, in this construction method, many connecting rebars are projected on the lower side surfaces of the beam-to-beam beam 21 and the beam-to-beam beam 22, and the part of the formwork is formed integrally with the beam-to-beam beam 21 or as an upper cut portion of the PCa floor plate. The PCa beam and the PCa floor board need to be specially processed and the concrete is placed so that the upper notch for connecting the beam main bar and anchoring anchor bar is also provided at the beam end. It was indispensable and had problems that required improvement in terms of cost and construction.

  Therefore, out of the reverse beam construction method, the out-frame construction method in which the structural pillar is provided on the balcony side and the handrail wall of the balcony is provided on the upper side of the slab with the reverse beam is by eliminating the beam of the living room provided on the balcony side, By making the sash a tall high sash, secure a bright and open room, expel the pillar protrusion from the corner of the room, and make the slab a non-beam plate without a beam, making the layout of the furniture a margin Although it is a construction method that attracts attention because it can provide a well-organized space, it has become a hindrance to the spread of construction methods because the above-mentioned problems and the need to build a scaffold outside have not yet been solved. As a result, an immediate solution is envied.

JP 11-50527 A (paragraph numbers “0032” to “0040”, FIG. 1)

  The present invention is proposed in order to solve the above-mentioned problems of the reverse beam method, and facilitates the construction of the out-frame frame without a scaffold and improves the strength of the column / beam joint while improving the efficiency. We provide a column and reverse beam construction method and a hollow PCa column form that can ensure the quality of the structure with sufficient accuracy.

  The column and beam construction method according to the present invention is a column main beam which is inserted into a hollow PCa column formwork in a column and beam construction method comprising a column and a reverse beam in the row direction and a forward beam in the inter-beam direction. Is connected to the column main bar from the lower floor column, and then formed into a hollow part and a rectangular edge part formed by embedding a hoop line, and the two opposite ends of the rectangular edge part are cut away. A hollow PCa column form frame having a forward beam engaging portion formed by notching a top portion of an inverted beam formed on one side and a tip portion of one side orthogonal to two sides and continuing below the upper portion is provided on a lower floor column. After installing the hoop bar in the column main bar of the joint space between the reverse beam and the column, the reverse beam main bar is connected to each other and the engaging part is connected to the engaging part. Engaging the forward beam in the inter-beam direction, extending the beam main reinforcement of the forward beam in the inter-beam direction to the hollow part of the hollow PCa column mold frame, Basically, it is necessary to install reinforcements and formwork for labs and cast the necessary concrete. After placing the end of the forward beam in the interbeam direction facing the engagement part of the hollow PCa column formwork, the upper end It is characterized in that the beam main bars are arranged or the end of the lower beam main bar is coupled to a fixing anchor bar that is positioned in advance in the hollow part of the hollow PCa column mold.

  As a result, the strength and accuracy of the column / beam joints in the out-frame frame can be secured to ensure the quality of the structure, and the construction can be carried out easily and efficiently without the need for scaffolding or skilled workers. I have to.

  Further, the hollow PCa column form according to the present invention is used for the above-mentioned reverse beam construction method, and has a rectangular edge formed by forming a hollow portion and a hollow portion for a column main reinforcing bar and embedding a hoop. The top part of the opposite beam in the direction of traversing formed by cutting out the two opposite ends of the rectangular edge and the bottom part of the one side perpendicular to the two sides are cut out below the mounting part. It is configured by forming a forward beam engaging portion in the inter-beam direction formed continuously.

  As a result, installation of hollow PCa column formwork on the column main bar, arrangement of hoop bars, placement on the top of the reverse beam in the column direction and joining of the main bars of the beam at the top and bottom of the beam in the column direction are performed by connecting bars. The mounting of the forward anchor beam in the direction and the anchor anchor bar to the lower beam main bar of the forward beam in the inter-beam direction is simplified, and the construction of the out-frame frame is made efficient.

  The column and beam construction method according to the present invention is such that a column main reinforcement inserted through a hollow PCa column mold is combined with a column main reinforcement from a lower floor column, and then a hollow portion and a hollow portion are formed and a hoop is embedded. It is composed of a rectangular edge, and the upper part of the reverse beam formed by notching the two opposite ends of the rectangular edge and the one end perpendicular to the two sides are notched and continued below the upper part. A hollow PCa column form frame with a forward beam engaging part formed on the lower floor column is installed on the lower floor column, and a reverse beam in the crossing direction is stretched over the upper part to serve as a column main bar of the joint space between the reverse beam and the column. After placing the hoop bars, the main bars of the reverse beams are connected to each other, and the forward beam in the inter-beam direction is engaged with the engaging part, so that the main beam of the forward beam in the inter-beam direction is the hollow part of the hollow precast concrete column formwork. Next, it is necessary to install slab reinforcement and formwork and place the necessary concrete. The end of the forward beam in the inter-beam direction is arranged opposite to the engaging portion of the hollow PCa column mold frame, and then the upper beam main bar is arranged, or the end of the lower beam beam bar is arranged in advance of the hollow PCa column mold frame. Since it is characterized in that it is connected to the anchor anchor muscle located in the hollow portion, the following effects are exhibited.

1) All the problems related to quality control and process control that the conventional reverse beam method has had can be solved.
2) The quality and quality of the structure can be ensured by securing the strength and accuracy of the column / beam joints in the out-frame frame.
3) Can be constructed easily and efficiently without the need for scaffolding or skilled workers.

  The hollow PCa column form frame according to the present invention is composed of a hollow portion for the column main reinforcement to be arranged and a rectangular edge portion formed by embedding a hoop wire and forming a hollow portion. Engagement between the upper part of the reverse beam in the crossing direction formed by cutting out the tip part of the side and the forward beam in the interbeam direction formed by cutting out the tip part of one side perpendicular to the two sides and continuing below the upper part Therefore, the following effects are exhibited.

1) It is easy to install a hollow PCa column formwork on the column main reinforcement and to arrange stirrup reinforcement.
2) It is easy to place the beam in the beam-reverse direction on the uplift and to connect the upper and lower beam main bars with connecting members.
3) It is possible to simplify the placement of the forward beam between the beams and the anchor anchor bar to the main beam of the lower beam.
4) Efficient construction of out-frame frames without scaffolding.

The column and beam construction method according to the present invention is such that a column main reinforcement inserted through a hollow PCa column mold is joined to a column main reinforcement from a lower floor column, and then a hollow portion and a hollow portion are formed and a hoop reinforcement is embedded. It is composed of a rectangular edge, and the upper part of the reverse beam formed by notching the two opposite ends of the rectangular edge and the one end perpendicular to the two sides are notched and continued below the upper part. A hollow PCa column form frame with a forward beam engaging part formed on the lower floor column is installed on the lower floor column, and a reverse beam in the crossing direction is stretched over the upper part to serve as a column main bar of the joint space between the reverse beam and the column. After the hoop bars are placed, the reverse beam main bars are joined together, and the forward beam in the inter-column direction is engaged with the engaging part, and the main beam of the forward beam in the inter-beam direction is hollowed in the hollow precast concrete column formwork. The slab bar arrangement and formwork are then installed to place the necessary concrete.
Hereinafter, embodiments of the present invention will be described in detail with reference to the perspective view of the column / beam joint in FIG. 1 and the respective construction process diagrams shown in FIGS.

  FIG. 1 is a perspective view showing a joint between a column and a reverse beam according to an embodiment to which the construction method of the present invention is applied. A column / beam joint 1 in an out-frame frame is composed of a column main reinforcement 2 and a PCa column. The column 3, the reverse beams 4, 4 in the column direction and the hollow PCa column molds which are placed on the mounting parts 3-2 formed on the two opposite sides of the hollow PCa column mold 3 and connected to each other 3 is a forward beam in the inter-beam direction that is engaged perpendicularly to the beam-reverse direction reverse beams 4 and 4 in an engagement portion 3-3 continuously formed on one side that is orthogonal to the two sides. It is composed of five.

  Thus, the column main reinforcement 2 has a column main reinforcement 2 in the joint space between the reverse beams 4 and 4 positioned on the upper portion 3-2 formed on the hollow PCa column mold 3 and the hollow PCa column mold 3. The hoop bars 6 are arranged on the upper and lower ends to provide predetermined reinforcement, and the upper and lower end beam main bars 4-1 and 4- By joining 2 with the connecting member 7, they are firmly joined to each other and are connected in a form that ensures sufficient strength.

  In addition, the remaining rectangular outer edge portion 3-6 in which the three sides of the front end portion of the hollow PCa column form frame 3 are cut out is configured as an outer wall of the building, so that the concrete is placed so that no peeling state occurs. In order to reinforce the bonding force, a plurality of stud dowels 3-7 are planted on the inner surface.

  Further, the forward beam 5 in the inter-beam direction is made of half precast concrete, and a plurality of stirrup bars 5-3 are exposed in the upper part and embedded in the beam concrete part, and the lower end beam main bar 5-1 is a beam. It is buried with its end protruding from the concrete part. The anchor anchor bar 8 is coupled to the lower beam main bar 5-1 protruding from the end and the upper beam main bar 5-2 arranged in the field, and the anchor anchor bar 8 is cut into the PCa column mold 3. By extending to the opposite side of the remaining hollow part 3-1, the coupling strength with the column is ensured.

  That is, one end of the hollow PCa column mold is extended in advance into the hollow portion, and the other end is protruded from the engagement portion of the hollow PCa column mold frame so that the fixing anchor bar 8 is arranged. 8 is coupled to the lower beam main bar 5-1 protruding from the end of the forward beam, so that the lower beam main bar 5-1 of the forward beam is extended to the hollow part of the hollow PCa column mold.

  The out-frame frame is constructed by placing floor slab reinforcement and formwork, and then placing concrete on the columns, beams, and floor slab. The quality of the structure is ensured by ensuring the strength and accuracy of the joint.

  2 to 4 shown below are respective construction process diagrams of the embodiment relating to the construction method of the column and the reverse beam according to the present invention, and ease of construction in the column / beam joint 1 of the out-frame frame and the column / beam joint. The situation where the strength and accuracy of the part can be secured is clarified.

  FIG. 2 shows a process for lifting the column main reinforcement 2 and the hollow PCa column mold 3 according to the present invention and installing the column main reinforcement 2 on a column that has already been constructed. The column main reinforcement 2 and the hollow PCa column mold shown in FIG. It is embodiment which shows the lifting state of the frame 3, the installation state of the column main reinforcement 2 and the hollow PCa column-shaped frame 3 shown in FIG.

  In the present embodiment, as shown in FIG. 2A, the column main reinforcement 2 pre-equipped with a predetermined hoop reinforcement 6 is movably inserted into the hollow portion of the hollow PCa column mold 3 and lifted. It is lifted integrally while being associated under the apparatus 9, and is arranged so as to protrude from the lower end of the hollow PCa column mold 3 so that the column main reinforcement 2 can be joined to the column 10 of the already constructed lower floor. At the same time, the hollow PCa column mold 3 necessary for placing column concrete is appropriately installed.

  Next, the column main reinforcement 2 and the column main reinforcement 10-1 protruding from the column 10 are joined to each other by a joint 11 such as a mechanical joint or a lap joint as shown in FIG. The frame 3 is lowered to a predetermined position on the lower floor pillar 10 after the joining of the column main bars 2 and is installed at a construction position in the RC pillar as usual.

  Then, after the hollow PCa column mold 3 is installed, the reverse beams 4 and 4 in the direction of the beam are placed on the mounting portion 3-2 of the installed hollow PCa column mold 3 from both sides of the hollow PCa column mold 3. At the same time, it is connected to the lower beam main reinforcement 5-1 of the forward beam frame 5 in the inter-beam direction, and is fixed to extend near the inner wall surface of the rectangular outer edge 3-6 opposite to the hollow portion 3-1. Anchor muscles 8 are arranged in advance. A fixing hardware is attached to an end of the fixing anchor muscle 8 on the hollow portion 3-1 side. When the fixing hardware is not used, the fixing anchor bar 8 is bent downward by a predetermined fixing length and inserted into the hollow portion.

FIG. 3 is a plan view (a) partially representing the column / beam joint and a side view (b) partially lacking the hoop line 6 to show the hollow PCa column form 3 and the column direction. Arrangement of the hoop bars 6 to be performed following the installation of the reverse beams 4 and 4, the connection of the upper and lower beam main bars 4-1 and 4-2 of the reverse beams 4 and 4 in the column direction, and the inter-column direction forward beam frame 5 are installed. The process is shown.
In this step, as shown in the plan view (a), reverse beams 4 and 4 in the row direction are mounted on the mounting part 3-2 formed on the hollow PCa column mold 3 from both sides of the PCa column mold 3. After being placed, the lower beam main reinforcement 4-2 protruding from the ends of the reverse beams 4 and 4 placed from both sides is connected by the joint 11-1, and then the column main reinforcement 2 is pre-equipped. The hoop bars 6 are arranged in a predetermined form between the reverse beams 4 and 4 in the column direction.

And after arranging the hoop muscle 6 on the inner surface of the rectangular outer edge portion 3-6 extending upward from the hollow PCa column mold 3, a plurality of stud dowels 3-7 are implanted. 3-7 is for strengthening the bonding force with the cast concrete so that the peeling state does not occur in order to configure the outer surface side of the rectangular outer edge portion 3-6 as the outer wall of the building.
In addition, if possible, the stud dowel 3-7 may be previously planted in the rectangular outer edge portion 3-6 before the hoop muscle 6 is disposed.

  Further, the reverse beams 4 and 4 in the column direction are inserted with the upper beam main reinforcement 4-1 between the hoop bars 6 arranged in a predetermined form and coupled with each other by a necessary connecting member 7, and also in the column direction. By connecting the lower beam main reinforcement 4-2 protruding from the ends of the reverse beams 4 and 4 with a joint 11-1, the beam-direction reverse beams 4 and 4 are firmly integrated to provide sufficient strength. Established.

  Further, the forward beam 5 in the inter-beam direction is engaged with the engaging portion 3-3 of the hollow PCa column mold 3 so as to be orthogonal to the reverse beams 4 and 4 in the direction of the beam as shown in FIG. It arrange | positions facing the engaging part 3-3, and is supported by the support work 12. FIG.

  Anchor anchor bars 8 are provided between the lower beam main bar 5-1 protruding from the end and the upper beam main bar 5-2 arranged inside the stirrup bar 5-3 of the forward beam frame 5 in the inter-beam direction. The joint 11-2 is connected to extend to the opposite side of the hollow portion 3-1, and the fixing anchor muscle 8 secures the coupling strength with the column.

  At this time, upper and lower beam main bars 5-2 and 5-1 and upper and lower beam main bars 5 between the end of the forward beam 5 in the inter-beam direction and the engaging part 3-3 of the hollow PCa column mold 3 are used. Stirrup bars 5-4 are arranged at predetermined intervals on the anchor anchor bars 8 connected to the lines 2 and 5-1, and the strength of the forward beam 5 in the inter-beam direction is ensured.

  In the present embodiment, the anchor anchor bar 8 is connected to the end of the upper beam main bar 5-2 by the joint 11-2 and extended to the opposite side of the hollow part 3-1. -2, the long upper end beam main bar 5-2 may be inserted as it is, extending as far as the inner wall surface of the rectangular outer edge 3-6 on the opposite side of the hollow part 3-1, without connecting the anchor anchor bar 8 to -2. .

  Further, the forward beam in the inter-beam direction is not formed as a half PCa in which the lower beam main reinforcing bar 5-1 and the stirrup bar 5-3 are embedded as in the present embodiment, but only the stirrup bar 5-3 is embedded. It can also be configured as a U-shaped formwork.

  4A and 4B are a plan view (a) and a side view (b) partially representing a column / beam joint, and a hollow PCa column form 3, reverse beams 4 and 4 in the column direction, and forward beams in the inter-beam direction. The process which installs the formwork which complements the frame 5, and the formwork of a floor slab, and places concrete is shown.

  As shown in the plan view (a), the mold in this step surrounds the column main bar 2 and the hoop bar 6 and closes the mounting portion 3-2 of the hollow PCa column mold 3 together with the reverse beams 4 and 4 in the direction of the beam. Fixed anchor bars connected to the column form frame 13 and upper and lower beam main bars 5-1 and 5-2 and upper and lower beam main bars 5-2 and 5-1 of the forward beam 5 in the inter-beam direction shown in the side view (b). 8 includes a beam form 14 that surrounds the stirrup bar 5-4 that shears and reinforces 8 and complements the forward beam 5 in the inter-beam direction, and a slab form 15 that forms a floor slab. 14 and the slab formwork 15 are supported by a support 12-1 and a support 16, respectively.

  After the above formwork is installed, although not shown in the figure, concrete is simultaneously cast on the hollow PCa pillar formwork 3 forming the pillar, the forward beam 5 in the inter-beam direction, and the slab formwork 15. Thus, the column / beam joint 1 of the out-frame frame is integrally formed. Then, when the complementary mold is removed after predetermined curing, an out-frame structure that secures desired strength and accuracy is completed.

  As is clear from the above embodiments, the column and beam construction method according to the present invention does not require the construction of an external scaffold and can be constructed easily and efficiently without requiring skilled workers only inside the building. As well as ensuring the strength and accuracy of the column / beam joints, the quality of the out-frame frame is ensured.

Next, the hollow PCa column form according to the present invention will be described.
The hollow PCa column form of the present invention is composed of a hollow portion for column main reinforcing bars and a rectangular edge formed by embedding a hoop line and forming a hollow portion. An upper beam portion of the beam in the crosswise direction formed by cutting out the tip portion, and an engaging portion of the forward beam in the inter-beam direction formed by cutting out the tip portion of one side perpendicular to the two sides and continuing below the upper portion. In the following, an embodiment of the present invention will be described in detail with reference to FIG. 5, but the hollow PCa column mold has a front view (a) and a front view (a) (b). )-(B) is shown in the cross-sectional view (b) as viewed from the arrow.

  As shown in the front view of FIG. 5 (a), the hollow PCa column form 3 is casted with concrete around the column main reinforcement 2 which is not shown but is installed as shown in FIG. It is comprised from the hollow part 3-1, and the rectangular edge part 3-5 for forming this hollow part 3-1. The hoop lines 3-4 are embedded at a predetermined pitch inside the rectangular edge 3-5, but at the upper end of the rectangular edge 3-5, the rectangular outer edge 3-6 at the back of the front is left 3 The upper portion 3-2 is formed on two opposite sides by cutting out the upper end of the rectangular edge of the surface, and the upper portion is mounted on the rectangular edge of one side orthogonal to the two sides of the three cut-out surfaces. An engaging portion 3-3 is formed following the portion 3-2. For this reason, the embedded hoop muscle 3-4 is not embedded in the rectangular outer edge portion 3-6 at the back of the front, but is exposed in the space portion of the engaging portion 3-3 as illustrated. Become.

  Moreover, since the outer surface side of the rectangular outer edge portion 3-6 at the back of the front is configured as the outer wall of the building, the inner surface thereof is strengthened in order to strengthen the bond strength with the cast concrete so that no peeling state occurs. On the side, a plurality of stud dowels 3-7 are planted in addition to the plurality of cotters 3-8.

In the present embodiment, the stud gibber 3-7 is removed from the rectangular outer edge 3-6 at the beginning of the construction as described above, and the stirrup muscle 6 is arranged in a predetermined form. Later, it is to be implanted on the inner surface of the rectangular outer edge portion 3-6 as shown in the figure. However, when construction is possible, the rectangular outer edge portion 3 before the hoop line 6 is placed on the stud gibber 3-7. You may plant in -6 beforehand.
A similar reinforcing measure is configured by providing a plurality of cotters 3-8 on the entire inner surface of the rectangular edge 3-5, as is apparent from the cross-sectional view of FIG.

As described above, the hollow PCa column mold according to the present invention is configured as shown in the embodiment, so that it is easy to install the hollow PCa column mold on the column main bar and to arrange the hoop bars. The construction of out-frame frames is made more efficient by simply placing the reverse beams in the direction and joining them with the connecting rebars, placing the forward beams in the inter-beam direction on the engaging part and connecting the anchor anchor bars. .
As described above, the present invention has been described in detail based on the embodiment. However, the column and beam construction method and the hollow PCa column formwork according to the present invention are not limited to the above embodiment, and the present invention is not limited thereto. As a matter of course, various modifications can be made without departing from the above-mentioned purpose.

  The present invention uses a specially formed hollow PCa column formwork to facilitate the construction of columns, reverse beams and forward beams, and to improve the construction efficiency. Advantages can be demonstrated in the construction of forward beams.

The perspective view which shows the junction part of a pillar, a reverse beam, and a forward beam which is embodiment which applied the construction method of this invention Process drawing for lifting hollow PCa column formwork and column main reinforcing bars according to the present invention, installing them on existing columns, and placing beam beams in reverse direction Process drawing of hoop reinforcement placement, connection between reverse beams in the column direction, installation of forward beam frame in the interbeam direction and necessary reinforcement Process drawing of placing concrete by placing a formwork and floor slab formwork into a hollow PCa column formwork, a reverse beam in the beam direction, and a forward beam frame in the interbeam direction Embodiment of a hollow PCa column form according to the present invention Construction drawing of conventional columns, reverse beams and slab floors

Explanation of symbols

1 column / beam joint, 2 column main reinforcement, 3 hollow PCa column formwork, 3-1 hollow portion,
3-2 mounting section, 3-3 engaging section, 3-4 hoop muscle, 3-5 rectangular edge,
3-6 Rectangular outer edge, 3-7 Stud gibber, 3-8 cotter,
4 Reverse beam in the column direction, 4-1 Top beam main bar, 4-2 Bottom beam main bar,
5 Forward beam frame in the direction between beams, 5-1 Lower beam main bar, 5-2 Upper beam main bar,
5-3, 5-4 Stirrup muscle, 6 Hoop muscle, 7 Connecting member,
8 Anchor anchor, 9 Lifting device, 10 Lower floor pillar,
10-1 column main reinforcement, 11, 11-1, 11-2 joint, 12, 12-1 support work, 13 column formwork, 14 beam formwork, 15 slab formwork, 16 support work,
21 Beam-to-beam beam, 22 Beam-to-column beam, 23 Column, 24 Upper beam main bar,
25 anchoring anchor muscle,

Claims (4)

Column and beam construction method consisting of a column and a reverse beam in the direction of the column and a forward beam in the inter-beam direction, the column main reinforcement inserted through the hollow precast concrete column formwork from the lower column Then, a hollow portion and a rectangular edge formed by forming a hollow portion and embedding a hoop line, and forming a reverse beam formed by cutting out two opposite end portions of the rectangular edge portion, A hollow precast concrete column form frame having a forward beam engaging portion formed by cutting a top portion and a tip portion of one side perpendicular to the two sides and continuing below the top portion is installed on the lower floor column. In addition, the reverse beam in the crossing direction is stretched over the mounting part, and the hoop bars are arranged in the column main bars of the joint space between the reverse beam and the columns, and then the reverse beam main bars are coupled to each other, and Engage the forward beam in the direction and connect the main bar of the forward beam in the interbeam direction to the hollow precast concrete. Is extended to the hollow portion of the preparative column formwork, then construction methods of columns and beams consists in pouring the concrete required to install the reinforcement and formwork for slabs. The forward beam in the inter-beam direction is made of half precast concrete, and the upper end beam main reinforcement is arranged after the end portion is arranged to face the engaging portion of the hollow precast concrete column mold. Item 1. Construction method of columns and beams according to item 1. The forward beam in the inter-beam direction is coupled to a fixing anchor bar in which the end of the bottom beam main bar is previously positioned in the hollow part of the hollow precast concrete column formwork. Beam construction method. It is composed of a hollow part for arranging column main bars and a rectangular edge part formed by embedding a hoop line and forming the hollow part, and formed by cutting off the two opposite end parts of the rectangular edge part. An upper beam portion of the reverse beam in the crossing direction and an engagement portion of the forward beam in the inter-beam direction formed by notching the tip portion of one side orthogonal to the two sides and continuously below the upper portion. Item 4. A hollow precast concrete column form used in the beam construction method according to any one of Items 1 to 3.

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