JP2017110346A - Construction method for beam-column frames using precast concrete columns. - Google Patents

Abstract

The present invention provides a method for constructing a column beam frame using a precast concrete column that can be surely filled with concrete, is easy to construct, and can reduce the construction cost.
A precast concrete column (3) has an internal space (3c) having an upper end (3b) opened, and the side space (3g) of the precast concrete column (3) is connected to the outside in the vicinity of the lower end of the internal space (3c). A press-fit opening is provided, and the beam-column joining member 4 includes an outer shell body 21 having an inner space 22 having an upper end and a lower end opened, and an outer shell body 21 connected to the outer shell body 21 in the horizontal direction. The joint member 20 for joining the beam 5 projecting in the direction is provided, so that the precast concrete column 3 is erected, and the internal spaces 3c and 22 of both the precast concrete column 3 and the column beam joining member 4 communicate with each other. Next, the column beam joining member 4 is installed on the precast concrete column 3, and the concrete 42 is press-fitted from the press-fit opening of the precast concrete column 3.
[Selection] Figure 6

Description

  The present invention relates to a method for constructing a column beam frame using a precast concrete column.

  For example, a composite structure in which a column is reinforced concrete and a beam is a steel frame is widely used because it has a better balance between construction cost and construction period than steel and reinforced concrete structures. Yes.

  In the case of using the composite structure as described above, when trying to further reduce the work period, it takes a lot of man-hours and labor to construct a reinforced concrete column (hereinafter referred to as RC column), and the work period becomes longer. Therefore, the construction of the RC pillar becomes a bottleneck. However, if the RC column's PCa ratio is increased in an attempt to realize the entire RC column or many parts with precast concrete (hereinafter referred to as PCa) in order to shorten the construction period, the weight of the RC column will increase. In addition, large-scale heavy machinery and transporting machines are required for carrying in and setting on the site, which increases construction costs. Therefore, there is a need for a construction method that can be realized in a construction period equivalent to the case where the entire RC pillar is made of PCa while reducing the weight of the RC pillar by reducing the PCa ratio of the RC pillar.

  As one of such construction methods, a construction method using a hollow RC column, that is, a hollow RC column that is reduced in weight by reducing the PCa rate by forming it so as to have an internal space whose upper end is open. Has been done. After setting up the hollow RC pillar, it is possible to reduce the weight of the RC pillar and shorten the construction period by placing concrete in the internal space of the pillar. Patent Document 1 discloses such a PCa column.

  When using a hollow RC column, a panel zone having a cylindrical body having an internal space with an upper end and a lower end opened, and a joint member for beam joining that penetrates the cylindrical body in the horizontal direction, It may be installed on the top of a hollow RC column and the column and beam may be joined by a panel zone. In the construction of such a column beam frame, if the panel zone is installed at the upper part of the column before placing the concrete in the inner space of the column, the tremy pipe is passed through the panel zone from the upper part of the panel zone to the inner space of the column. Therefore, the concrete is placed simultaneously into the interior space of the pillar and the interior of the panel zone. However, steel frames that form beams such as joint members and column reinforcements are densely arranged inside the panel zone, so the insertion of tremey pipes from the top of the panel zone and the placement of concrete Is not easy.

  Therefore, in the construction of such a column beam frame, before installing the panel zone, the tremy tube is positioned in the internal space of the column from the upper part of the hollow RC column, and concrete is placed in the internal space of the column, and then the upper part of the column In many cases, a panel zone is installed, and concrete is again placed inside the panel zone from above the panel zone.

  As another construction method using a hollow RC column, Patent Document 2 discloses a concrete strength sorting method for a column and a beam as shown in FIG. In the construction method disclosed in Patent Document 2, a PCa column 200 as shown in FIG. 17A is used. The PCa column 200 is made of a hollow precast made of high-strength concrete with a main reinforcing bar (not shown) extending in the vertical direction, and a prefabricated reinforcing bar beam 203 and a hoop bar 204 are arranged on the upper side.

  First, as shown in FIG. 17A, the precast column 200 that is ground is hung at the place where the core reinforcement 207 is built with the core reinforcement joint 208. Next, as shown in FIG. 17B, the beam portions of the suspended precast columns 200 are joined by a beam main reinforcement joint 209. Further, as shown in FIG. 17C, the upper core 210 is joined to the upper part of the core 207 of the precast column 200. Finally, as shown in FIG. 17 (d), high-strength concrete is press-fitted with a pump 214 from below the precast pillar 200 that has been built.

JP 2004-332236 A Japanese Patent Laid-Open No. 7-207751

  First, in the method using the panel zone as described above, there is a problem that the man-hour is increased because the concrete must be placed in two stages.

  In addition, when placing concrete from the top of the hollow RC column or panel zone, it is necessary to use a vibrator to fill the concrete. The operation of applying the vibrator itself is time-consuming, so that the number of construction steps increases and the construction cost increases. Further, in this case, since the air bubbles in the concrete produced by the vibrator are accumulated directly under the bottom surface of the joint member installed horizontally, it is difficult to ensure the filling property of the concrete particularly directly under the bottom surface of the joint member. .

  In addition, when concrete is placed from the top of the hollow RC column or panel zone, there is a portion where it is difficult to ensure the filling property of the concrete as described above. It is necessary to visually check by cutting. That is, it is not easy to check the filling property.

  Furthermore, when the gap between the lower surface of the joint member and the concrete placed in the first stage is small, the concrete is not sufficiently distributed below the lower surface of the joint member in the second stage of concrete placement. Therefore, the panel zone needs to be installed with a sufficient distance, for example, 300 mm, between the lower surface of the joint member and the concrete placed in the first stage. At this time, it may be necessary to install a formwork between the panel zone and the upper surface of the hollow RC pillar, and a larger number of construction steps are required for the installation of the formwork.

  Next, in the construction method described in Patent Document 2, since the hollow precast column 200 is integrated with the column portion and the portion corresponding to the panel zone, it is very difficult to manufacture the hollow precast column 200. It is not realistic. As one method for producing the hollow precast column 200, it is conceivable that concrete is placed around the lath net after the inner space of the precast column 200 is formed by partitioning with a lath net or the like. However, since the joint part of the precast column 200 is made of reinforced concrete, the rebar and steel frame are densely packed. In such a structure, it is easy to partition the internal space using a lath net or the like. is not.

  As another method of manufacturing the hollow precast column 200, it is conceivable to centrifugally shape the precast column 200. However, in the precast column 200, the prefabricated reinforcing bar beam 203 and the hoop bar 204 protrude outward from the panel zone. In order to perform centrifugal shaping in such a state, it is difficult to manufacture a formwork or a rotating bed. Man-hour and cost increase in production.

  The problem to be solved by the present invention is to provide a method for constructing a column beam frame using a precast concrete column that can be surely filled with concrete, can be easily constructed, and can reduce the construction cost. .

The present invention employs the following means in order to solve the above problems. That is, the construction method of the column beam frame using the precast concrete column according to the present invention is to join the beam to the column head of the precast concrete column that is erected using the column beam joining member, and the precast concrete column is An inner space having an upper end opened, and a press-fit opening that communicates the inner space with the outside is provided near a lower end of the inner space on a side surface of the precast concrete column. The joining member includes an outer shell body having an internal space whose upper and lower ends are open, and a joint member for beam joining that is connected to the outer shell body in a horizontal direction and protrudes outward from the outer shell body. The precast concrete column is erected, and the precast concrete column and the beam-to-column connecting member are communicated with each other so that the internal space is communicated. Installing the beam-to-column connecting member on a concrete column, press-fitting concrete from the press-in opening of the precast concrete column, and filling the internal space of both the precast concrete column and the beam-to-column connecting member. ,including.
According to such a configuration, concrete is press-fitted from the press-fitting opening of the PCa column, and the internal spaces of both the PCa column and the column beam joint member are filled at the same time. This not only reduces the number of times of placing concrete, but also eliminates the need to install a formwork between the panel zone and the upper surface of the hollow RC column. Moreover, it is not necessary to insert the tremy tube while avoiding the reinforcing bars and steel frames. Therefore, it is possible to facilitate the construction and reduce the number of construction man-hours.
In addition, the concrete is not cast from the upper part of the beam-column joining member, but from the press-fit opening provided near the lower end of the internal space, that is, the concrete is cast by press-fitting from the lower part of the internal space. No need to apply work. Therefore, it is possible to reduce construction man-hours.
In particular, when the joint member penetrates the outer shell body in the horizontal direction, as described above, it is unlikely that the work of applying the vibrator is required, so that the possibility that bubbles are accumulated below the lower surface of the joint member is low. Means. In other words, concrete can be filled more densely below the lower surface of the joint member as compared with the conventional method. Therefore, it is easy to ensure the filling property of the concrete, and confirmation of the filling property is basically unnecessary.
In addition to the above, according to the configuration as described above, the PCa column is separated and formed as a member separate from the column beam joining member, that is, the panel zone. It is applied to the production of general box culverts in which the inner formwork is installed in the formwork that forms the outer periphery of the pillar, concrete is placed around these, and then the inner formwork is removed. A simple method can be applied. That is, it is possible to manufacture the PCa pillar at a low cost, and it is possible to reduce the number of construction steps and increase the filling property of the concrete as described above by a method that is realistic and easy to implement.
In addition to a simple method applied to the production of a general box culvert, a method of embedding a spiral steel void or the like in the center of the column and not demolding may be used. This method is suitable when there are few identical PCa members and it is not reasonable to manufacture the inner mold.

In one aspect of the present invention, the joint member penetrates the outer shell body in the horizontal direction, and a lower surface of a portion of the joint member positioned inward of the outer shell body is disposed below the joint member. An anchor material extending in a direction is fixed, and the anchor material is inserted into the internal space of the precast concrete column when the beam-column joining member is installed on the precast concrete column. .
According to such a configuration, for example, even when the span between columns is long, the bending moment acting on the beam can be reliably transmitted to the column by the anchor material inserted into the internal space of the PCa column. . Therefore, it is possible to realize a strong housing.

In one aspect of the present invention, a method for constructing a beam-column frame using a precast concrete column is between the precast concrete column and the beam-column joining member that are erected or between the precast concrete column and the beam-column joint. It includes installing a sealing member on the outer periphery of the joining portion of the member.
According to such a configuration, since the sealing member is installed so as to surround the joint portion between the beam-column joining member and the PCa column or on the outer periphery of the joint portion between the beam-column joining member and the PCa column, It is possible to prevent the concrete that has been press-fitted into the internal space between the beam-column joining member and the PCa column from flowing out between the beam-column joining member and the PCa column. Therefore, it is possible to effectively ensure the filling property of the concrete.

In one aspect of the present invention, a method for constructing a beam-column frame using a precast concrete column opens the lower end in addition to the upper end on the installed beam-column joining member before filling the concrete. Installing a second precast concrete column having an internal space, and installing a second beam-column joining member on the second precast concrete column, Is filled in each internal space of the second precast concrete column and the second beam-column joining member in addition to each internal space of the precast concrete column and the beam-column joining member.
According to such a configuration, since it is possible to place concrete on a plurality of levels of PCa pillars at once, it is possible to effectively reduce the number of construction steps.

In one aspect of the present invention, the outer shell body has an extending portion extending outward in the extending direction of the joint member, and the extending portion has a beam insertion opening. In the construction method of the column beam frame using the precast concrete column, the beam is joined to the joint member by inserting the beam insertion opening of the column beam joining member before filling the concrete. In the press-fitting of the concrete, in addition to the internal spaces of the precast concrete column and the beam-column joining member, the concrete is also filled around the end of the beam located in the extension portion. .
According to such a configuration, when the beam end portion is made of steel reinforced concrete, the concrete placement of the beam end portion can be performed simultaneously with the placement of the column beam joining member and the PCa column into the internal space. Therefore, it is possible to reduce the work man-hours more effectively.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the construction method of the column beam frame using the precast concrete column which can be reliably filled with concrete, is easy to construct, and can reduce the construction cost.

It is the front view which carried out the partial cross section view of the column beam frame constructed in the column beam frame construction method using PCa shown as an embodiment of the present invention. (A) is a front view and (b), (c), and (d) are sectional views of the PCa column constituting the column beam frame. It is a perspective view of the column beam joining member which constitutes the above-mentioned column beam frame. It is explanatory drawing of the sealing member which comprises the said column beam frame. It is a perspective view explaining the said construction method. It is a perspective view explaining the said construction method. It is explanatory drawing of the 1st modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is explanatory drawing of the 2nd modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is a perspective view explaining the 3rd modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is sectional drawing explaining the 3rd modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is a perspective view explaining the 3rd modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is a perspective view explaining the 3rd modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is explanatory drawing of the 4th modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is explanatory drawing of the 5th modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is explanatory drawing of the 6th modification of the construction method of the column beam frame using PCa shown as the said embodiment. It is sectional drawing of a PCa pillar. It is explanatory drawing of the joining structure of the conventional beam and a column.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partial cross-sectional front view of a column beam frame 1 constructed in the column beam frame construction method using PCa shown as an embodiment of the present invention.
The column beam frame 1 is formed by bonding a beam 5 to a column head 3a of a PCa column 3 erected on a foundation, a floor slab 2, or the like using a column beam connecting member 4. The PCa pillar 3 and the beam-column joining member 4 both have an internal space immediately after being installed on the foundation 2 or the like, and are filled by concrete being pressed into the interior space later. A frame 1 is formed.

  FIG. 2 (a) is a front view of the PCa pillar 3 before installation, that is, before placing concrete in the internal space, and FIG. 2 (b) is a cross-sectional view taken along line AA ′ of FIG. 2 (a). 2C is a cross-sectional view taken along the line BB ′ of FIG. 2A, and FIG. 2D is a cross-sectional view taken along the line CC ′ of FIGS. 2B and 2C.

  The PCa pillar 3 has an internal space 3c whose upper end 3b is open. In the present embodiment, the cross-sectional shape in the width direction Y orthogonal to the length direction X of the PCa pillar 3 is a rectangular shape as shown in FIGS. The internal space 3c of the PCa pillar 3 is formed extending in the length direction X so that the cross-sectional shape in the width direction Y is circular. It goes without saying that the cross-sectional shapes of the PCa pillar 3 and the internal space 3c may be other shapes as will be described later.

  In the present embodiment, the inner space 3c of the PCa pillar 3 has an opening at the lower end 3e in addition to the upper end 3b. When the PCa pillar 3 is erected on the foundation, the floor slab 2 or the like, the surface of the foundation or the like is the bottom surface of the internal space 3c, and the vicinity of the lower end 3e of the PCa pillar 3 is the vicinity of the lower end of the internal space 3c. . In the side surface 3g of the PCa pillar 3, in the vicinity of the lower end of the internal space 3c, a press-fitting opening 3d for communicating the internal space 3c with the outside is provided. In the column beam frame 1 shown in FIG. 1, the concrete is press-fitted into the internal space 3c as described above, and the press-fitting opening 3d is closed by the concrete.

Between the side surface 3g of the PCa column 3 and the inner wall 3f of the internal space 3c, a plurality of main bars 10 are installed extending in the length direction X of the PCa column 3. The main bar 10 is installed so that the upper end 10a of the main bar 10 protrudes from the upper end 3b of the PCa column 3. A mechanical joint 12 is embedded in the lower end 3e of the PCa column 3 so that one end face 12a is exposed from the lower end 3e, and is inserted between the end face 12a and the other end face 12b of the mechanical joint 12. The lower end 10b of the main muscle 10 is inserted and fixed in the internal space 12c formed in the above. As shown in FIG. 2 (c), a grout injection hole 3h is provided in the side surface 3g of the PCa column 3 so as to communicate the internal space 12c of the mechanical joint 12 with the outside.
The gluteal muscles 11 are arranged so as to surround the main muscle 10.

  As will be described later as a third modified example, the PCa column 3 may be installed on another member, for example, a column beam joining member 4 described below. At this time, the lower end 3e provided with the mechanical joint 12 functions as a joint with other members.

  On the upper end 3b of the PCa column 3, a level adjusting bolt 3i is provided as shown in FIG. As will be described later, the beam-column joining member 4 is installed on the upper end 3b of the PCa column 3. At the time of this installation, the height of the beam-column joining member 4 is adjusted by the level adjusting bolt 3i.

  FIG. 3 is a perspective view of the beam-column joining member 4. The beam-column joining member 4 includes an outer shell body 21 and a joint member 20 for beam joining.

  The outer shell body 21 is formed by joining four rectangular steel plates having substantially the same shape and positioned parallel to the vertical direction, and vertically joining each other on the side, so that the thickness direction of the steel plate, that is, the horizontal direction in FIG. It is formed so that the cross-sectional shape at Y is a rectangular cylindrical body. As a result, the outer shell body 21 has an internal space 22 whose upper and lower ends are open.

  The joint member 20 is connected to the outer shell body 21 in the horizontal direction and is provided so as to protrude outward from the outer shell body 21. More specifically, an opening 21a having a cross-sectional shape of the joint member 20 is provided in the opposing steel plates of the outer shell body 21, and the joint member 20 is an opening provided in each of the opposing steel plates. It is installed so as to pass through 21a, that is, so as to penetrate the outer shell body 21 in the horizontal direction. In this embodiment, H-shaped steel is used as a beam, and the joint member 20 is also manufactured using H-shaped steel in order to join the beam. Therefore, the opening 21a has substantially the same shape as the cross-sectional shape of the H-shaped steel.

  A plurality of openings 20a are formed in the vicinity of the inner surface of the outer shell body 21 of the joint member 20, and a hoop line 23 is installed through the opening 20a. The hoop muscles 23 are installed so as to go around a little inside the inner surface of the outer shell body 21 and to extend the inner surface along the horizontal direction. One hoop line 23 is cut to such a length that both ends of the hoop line 23 are overlapped when installed as described above, and the overlapped part is welded and fixed.

  A level adjusting bolt 26 is joined to the upper surface of the joint member 20. As will be described later as a third modification, the PCa column 3 may be installed on the beam-column joining member 4. At this installation, the height of the PCa column 3 is adjusted by the level adjusting bolt 26. Is done.

  Fig.4 (a) is a cross-sectional enlarged view of the D arrow part of FIG. As shown in this figure, the upper L-shaped steel 24 is disposed on the outer upper end of each steel plate constituting the outer shell body 21 of the beam-column joining member 4, with one outer surface facing upward, and the upper end of the steel plate. It is joined so as to be parallel to the same height position as the side. Further, the lower L-shaped steel 25 is disposed at the lower outer end of each steel plate constituting the outer shell body 21 of the beam-column joining member 4 so that one outer surface 25a faces downward and the same height as the lower end side of the steel plate. It is joined so as to be parallel to the vertical position.

  The distance between the inner surfaces 21b of the opposing steel plates of the outer shell body 21 of the beam-column joining member 4, that is, the internal dimension, is slightly larger than the dimension between the opposite side surfaces 3g of the PCa column 3. The column beam joining member 4 is formed.

  As shown in FIGS. 1 and 4A and the like, the beam-column joining member 4 is installed on the column head 3a of the PCa column 3 standing upright. The PCa column 3 has an internal space 3c whose upper end 3b is open, and the beam-column joining member 4 has an internal space 22 whose lower end is open. Moreover, the internal dimension of the outer shell 21 of the beam-column joining member 4 is larger than the outer dimension of the PCa column 3 as described above. Therefore, when the column beam connecting member 4 is installed in this way, the internal space 3c of the PCa column 3 and the internal space 22 of the column beam connecting member 4 communicate with each other before placing concrete. A column beam frame 1 as shown in FIG. 1 is formed by press-fitting concrete into the communicating internal spaces 3c and 22 and filling them.

  FIG.4 (b) is an enlarged view of the E arrow view part of Fig.4 (a). The upper L-shaped steel 30 is joined to the outer upper end of the PCa column 3 so that one outer surface 30a faces upward and is parallel to the same height position as the upper end 3b of the PCa column 3. . The sealing member 31 is installed so that it may be pinched | interposed into the lower surface 25a of the lower L-shaped steel 25 of the beam-column joining member 4 and the upper surface 30a of the upper L-shaped steel 30 of the PCa column 3.

  The sealing member 31 surrounds the periphery of the opening of the PCa column 3, and particularly in the present embodiment, the inner wall 31 a of the sealing member 31 is located at the same position as the outer side surface 3 g of the PCa column 3 or the outer side surface 3 g. It is installed so that it is located slightly outside. As the sealing member 31, for example, a gasket made of CR sponge or the like may be used. In this case, as shown in FIG. 4B, after the sealing member 31 is installed on the upper surface 30a of the upper L-shaped steel 30 of the PCa column 3, the lower L-shaped steel 25 of the column beam joining member 4 is placed thereon. Since the column beam joining member 4 is installed so that the lower surface 25a is positioned, the sealing member 31 is compressed vertically and extends in the lateral direction. It is necessary to install the sealing member 31 in consideration of this extension so that the position of the inner wall 31a of the sealing member 31 after the column beam joining member 4 is installed satisfies the above-described positional condition.

As shown in FIG. 4A, the main bar 10 of the PCa column 3 is inserted through the internal space 22 of the beam-column joining member 4 so that the upper end 10 a of the main bar 10 is located above the beam-column joining member 4. Is installed. As described above, the internal space 22 of the column beam joining member 4 is filled with concrete to form the column beam frame 1 as shown in FIG. Therefore, the portion located in the internal space 22 such as the main bar 10 of the PCa column 3, the joint member 20 of the beam-column joining member 4, and the hoop bar 23 are the column beam frame 1 after the concrete placement shown in FIG. Is buried in concrete.
In the present embodiment, the outer shell body 21 of the beam-column joining member 4 is a discarded frame, and is not removed even after the column beam frame 1 shown in FIG.

  Next, a method for constructing the column beam frame 1 shown in FIG. 1 will be described with reference to FIGS.

First, the PCa column 3 and the column beam joining member 4 are manufactured. The production may be performed at the factory and transferred to the construction site, or may be performed at the construction site.
The PCa pillar 3 transferred or manufactured on site is erected on a foundation or the like so that the upper end of the internal space 3c opens.

  At this time, the press fitting 40 is installed in the press fitting opening 3d of the PCa column 3 shown in FIG. The press fitting 40 is attached to an insert (not shown) installed around the press fitting opening 3d of the PCa column 3 by tightening with a bolt or the like. The press fitting 40 may be installed on the PCa column 3 immediately after the production of the PCa column 3 and then transferred to the construction site.

  Furthermore, the sealing member 31 is installed around the opening at the upper end of the standing PCa pillar 3. More specifically, as described with reference to FIG. 4, when the column beam joining member 4 is installed later, the inner wall 31 a of the sealing member 31 extending in the lateral direction is connected to the outer side surface 3 g of the PCa column 3. The sealing member 31 is installed so as to be located at the same position or slightly outside the outer side surface 3g.

  Next, as shown in FIG. 5, on the PCa column 3, and more specifically, around the opening at the upper end so that the internal spaces 3 c and 22 of both the PCa column 3 and the column beam joining member 4 communicate with each other. The column beam joining member 4 is installed on the installed sealing member 31.

At this time, as shown in FIG. 5C, the main bar 10 of the PCa column 3 has its upper end 10 a inserted through the internal space 22 of the beam-column joining member 4 and from the opening at the upper end of the beam-column joining member 4. Install so that it protrudes. The upper end 10a of the main bar 10 is inserted into the internal space 22 with the main bars 10 positioned close together by a number line or the like, and the main line 10 is released by cutting the number line after being inserted. 4 can be easily prevented.
In addition, the column beam connecting member 4 is not bonded to the PCa column 3 and is temporarily placed before placing the concrete in each of the internal spaces 3c and 22, so the position of the column beam connecting member 4 is In order to prevent displacement, the bottom surface of the joint member 20 and the outer side surface 3g of the PCa column 3 are fixed with a turnbuckle 41 or the like.

  Further, as shown in FIG. 6, after the beam 5 is joined to the joint member 20 of the column beam joining member 4, a concrete press-fit pipe 43 is connected to the press-fit metal 40, and the concrete press-fit pipe 43 is connected by a pump (not shown). Concrete 42 is press-fitted to fill the internal spaces 3 c and 22 of both the PCa column 3 and the beam-column joining member 4. As shown in FIG. 2, since the press-fit opening 3d is provided in the vicinity of the lower end of the internal space 3c, as the concrete 42 is press-fitted from the press-fit opening 3d, the upper surface of the concrete 42 becomes the internal space of the PCa column 3. Ascend 3c. When the upper surface of the concrete 42 exceeds the upper end 3b of the PCa column 3, the concrete 42 is subsequently placed in the internal space 22 of the column beam joining member 4 as shown in FIG.

  Finally, after the concrete 42 is cured and hardened, the press fitting 40 is removed, and a recess such as an insert is filled and repaired with mortar or the like to repair the PCa around the press-fit opening 3d shown in FIG. The side surface 3g of the pillar 3 is smoothed.

  Next, the operation and effect of the construction method of the column beam frame using PCa shown as the above embodiment will be described.

  In the column beam frame 1 as shown in FIG. 1 constructed by such a construction method, the concrete 42 as shown in FIG. 6 is inserted from the press-in opening 3d of the PCa column 3 shown in FIG. Since the inner spaces 3c and 22 of both the PCa column 3 and the beam-column joining member 4 are filled at the same time, the concrete 42 can be placed only once. This not only reduces the number of times the concrete 42 is placed, but also eliminates the need to install a formwork between the beam-column joining member 4 and the upper surface of the PCa column 3. Moreover, it is not necessary to insert the tremy tube while avoiding the reinforcing bars and steel frames. Therefore, it is possible to facilitate the construction and reduce the number of construction man-hours.

  In addition, the concrete 42 is not placed from the upper part of the column beam joining member 4 but from the press-fit opening 3d provided in the vicinity of the lower end of the internal space 3c of the PCa column 3 as shown in FIG. Since the concrete 42 is placed by press-fitting from the lower side of the space 3c, a work for applying a vibrator is not required. Therefore, it is possible to reduce construction man-hours.

  As described above, the fact that the operation of applying the vibrator is not required means that there is a low possibility that bubbles are accumulated below the lower surface of the joint member 20 of the column beam joining member 4. That is, concrete 42 can be filled with the concrete 42 even under the lower surface of the joint member 20. Therefore, it is easy to ensure the filling property of the concrete 42 and the confirmation of the filling property is basically unnecessary.

  In addition to the above, according to the configuration as described above, the PCa column 3 is separated and formed as a member different from the column beam joining member 4. The inner mold is installed in the mold that forms the outer periphery of No. 3, the concrete is placed around these, and then the inner mold is removed. A simple method can be applied. That is, it is possible to manufacture the PCa pillar 3 at a low cost, and it is possible to reduce the number of construction steps and increase the filling property of the concrete 42 as described above by a method that is realistic and easy to implement. .

  Further, as shown in FIG. 4, since the sealing member 31 is installed between the beam-column joining member 4 and the PCa column 3, it is press-fitted into the internal spaces 3 c, 22 of the beam-column joining member 4 and the PCa column 3. It is possible to prevent the concrete 42 from flowing out between the column beam connecting member 4 and the PCa column 3. Therefore, it is possible to effectively ensure the filling property of the concrete 42.

  In the present embodiment, the inner wall 31a of the sealing member 31 shown in FIG. 4 is located at the same position as the outer side surface 3g of the PCa column 3 so that the sealing member 31 surrounds the periphery of the opening of the PCa column 3. The concrete 42 located at the height of the sealing member 31 can be prevented from being partially thinner than the PCa pillar 3 because it is installed slightly outside the outer side surface 3g. It is. Thereby, the robust column beam frame 1 can be realized while ensuring the filling property of the concrete 42 as described above.

  In addition, the column-beam connecting member 4 is a part that is required to be particularly strong in terms of structure through which columns and beams are bonded and through which many reinforcing bars and steel frames or these joint members are inserted. In the present embodiment, the distance between the inner surfaces 21 b of the opposing steel plates of the outer shell body 21 of the beam-column joining member 4, that is, the inner dimension is larger than the outer dimension of the PCa column 3. Therefore, even when the thickness of the concrete 42 filled in the internal space 22 of the beam-column joining member 4 is slightly reduced as a result of the position of the outer shell body 21 deviating from the planned position due to construction errors or the like, the joint portion The risk of impairing the strength of the can be reduced.

(First Modification of Embodiment)
Next, the 1st modification of the column beam frame 1 shown as the said embodiment is demonstrated using FIG. FIG. 7 is an explanatory diagram of the column beam frame 50 in the first modification. The column beam frame 50 in the first modified example is different from the above-described column beam frame 1 in the inner shell 53 of the joint member 52 of the column beam joint member 51 that penetrates the outer shell 53 in the horizontal direction. The difference is that the anchor material 54 extending downward is fixed to the lower surface of the portion located in the direction.

  In the column beam connecting member 51 as described above, as shown in FIG. 7A, the anchor material 54 is inserted into the internal space 3 c of the PCa column 3 when installed on the PCa column 3. Is done. In this state, as shown in FIG. 7B, when the concrete 42 is press-fitted in the same manner as the construction method shown as the above embodiment, the anchor material 54 is embedded in the concrete 42 in the internal space 3 c of the PCa pillar 3. And fixed to the PCa pillar 3.

  According to such a configuration, for example, even when the span between columns is long, the bending moment acting on the beam is reliably transmitted to the column 3 by the anchor material 54 inserted into the internal space 3c of the PCa column 3. can do. Therefore, it is possible to realize a strong housing.

  In the first modification, the PCa pillar 3 can be manufactured at a low cost as in the above embodiment, and the construction man-hour is reduced and the concrete 42 is filled by a method that is realistic and easy to implement. Needless to say, it is possible to improve the property, effectively ensure the filling property of the concrete 42, and realize a robust column beam structure.

(Second Modification of Embodiment)
Next, the 2nd modification of the column beam frame 1 shown as the said embodiment is demonstrated using FIG. FIG. 8 is an explanatory diagram of the column beam frame 60 in the second modification. The column beam frame 60 in the second modification is different from the above-described column beam frame 1 in that the PCa column 61 is hollowed out to form an internal space 61c, and the bottom surface 61d of the internal space 61c of the PCa column 61 is formed. Is different in that it is located at the upper part of the upright PCa column 61.

  According to such a configuration, it is possible to increase the PCa rate of the PCa column 61 and reduce the hollow portion 61c to such an extent that a large hoisting machine or a transporting machine is not required. Thereby, it is possible to reduce the placement amount of the concrete 42 to the hollow portion 61c at the site, and therefore, balance between the reduction in the number of constructions related to the placement of the ready-mixed concrete at the site and the increase in the weight of the PCa column. It is possible.

  In the second modification, the PCa pillar 61 can be manufactured at a low cost as in the above embodiment, and the construction man-hour is reduced and the concrete 42 is filled by a method that is realistic and easy to implement. Needless to say, it is possible to improve the property, effectively ensure the filling property of the concrete 42, and realize a robust column beam structure.

(Third Modification of Embodiment)
Next, the 3rd modification of the column beam frame 1 shown as the said embodiment is demonstrated using FIGS. 9-12. The construction method in the third modification is different from the construction method in the above embodiment in that the second PCa column 70 and the second PCa column 70 are further provided above the column beam joint member 4A (4) installed on the PCa column 3. The difference is that two beam-column joining members 4B (4) are installed and concrete is filled in these internal spaces 3c, 22, 70c, and 22.

  In the construction method in the third modification, first, as shown in FIG. 9A, the PCa column 3 and the column beam joining member 4A are installed in the manner described as the above embodiment. Next, the second PCa column 70 is installed further on the column beam joining member 4A. The second PCa column 70 is different from the PCa column 3 shown in FIG. 2 in that it does not have a press-fit opening that allows the internal space 70c to communicate with the outside. It has the same configuration. That is, the second PCa column 70 has an internal space 70c that opens in addition to the upper end 70b. Therefore, when the second PCa column 70 is installed on the beam-column joining member 4A, before placing concrete, the inner space 3c of the PCa column 3, the inner space 22 of the beam-column joining member 4A, and The internal spaces 70c of the second PCa pillars 70 communicate with each other.

  FIG. 10A shows a side sectional view of the joint portion of the PCa column 3, the beam-column joining member 4A, and the second PCa column 70. FIG. At the lower outer end of the second PCa column 70, the lower L-shaped steel 71 is positioned parallel to the same height position as the lower end 70e of the second PCa column 70 with one outer surface 71a facing downward. So that it is joined. The sealing member 72 is installed so as to be sandwiched between the upper surface 24a of the upper L-shaped steel 24 of the beam-column joining member 4A and the lower surface 71a of the lower L-shaped steel 71 of the second PCa column 70. The position of the inner wall 72a of the sealing member 72 is adjusted to be the same as the inner wall 31a of the sealing member 31 described in the above embodiment.

  Similar to the PCa column 3, the second PCa column 70 has a main reinforcement 73 and a mechanical joint 74. That is, the mechanical joint 74 is embedded so that one end face 74a is exposed from the lower end 70e of the second PCa column 70, and is inserted between the end face 74a and the other end face 74b of the mechanical joint 74. The lower end of the main muscle 73 is inserted and fixed in the internal space 74c formed in the above. When the second PCa column 70 is installed on the beam-column joining member 4A, the upper end 10a of the main bar 10 of the PCa column 3 is exposed from the lower end 70e of the second PCa column 70 of the mechanical joint 74. It inserts into the internal space 74c from the end surface 74a.

  FIG.10 (b) is an enlarged view of the F arrow view part of Fig.10 (a). After the upper end 10a of the main reinforcement 10 of the PCa column 3 is inserted into the internal space 74c of the mechanical joint 74, the grout is injected from the grout injection hole 70h provided in the side surface 70g of the second PCa column 70. The main muscle 10 is fixed in the mechanical joint 74.

At this time, for example, when it is necessary to support the lower end 70e of the second PCa column 70 with the level adjustment bolt 26 in order to adjust the height position of the second PCa column 70, the inside of the mechanical joint 74 The injected grout may flow out from the gap between the inner wall of the space 74 c and the outer surface of the main muscle 10.
In order to prevent this, the main bar 10 is inserted in advance through the spring 75 and the rubber 76 having a flat annular shape, and the rubber 76 is brought into close contact with the lower surface of the mechanical joint 74 by the elasticity of the spring 75. Grout can be prevented from flowing out.

  Before the concrete is placed in each of the internal spaces 3c, 22, and 70c, the second PCa column 70 is not bonded to the column beam connecting member 4, but is temporarily placed. Therefore, in order to prevent the displacement of the second PCa column 70, as shown in FIG. 9B, between the upper surface of the joint member 20 of the column beam joining member 4A and the outer side surface 70g of the second PCa column 70. Is fixed with a turnbuckle 41 or the like.

  Furthermore, as shown to Fig.11 (a), the 2nd column beam joining member 4B is installed on the 2nd PCa pillar 70. FIG. This can be performed in the same manner as the installation of the column beam joining member 4 on the PCa column 3 in the above embodiment. Thus, when the second beam-column joining member 4B is installed, before the concrete is placed, the internal space 3c of the PCa column 3, the inner space 22 of the beam-column joining member 4A, and the second PCa column 70 The internal space 70c and the internal space 22 of the second beam-column joining member 4B communicate with each other.

  In this state, as shown in FIG. 11 (b), the concrete press-fit pipe 43 is connected to the press fitting 40 of the PCa pillar 3 located at the lowest position, and the concrete 42 is press-fit from the concrete press-fit pipe 43 by a pump (not shown). To do. As described above, since the second PCa column 70 does not have a press-fit opening, that is, a hole communicating with the outside on the side surface 70g, as shown in order in FIGS. 12 (a) and 12 (b), The concrete 42 is filled in the internal spaces 70c and 22 of the second PCa column 70 and the second column beam joint member 4B in addition to the internal spaces 3c and 22 of the PCa column 3 and the column beam joint member 4A. The

  According to such a construction method, the concrete 42 can be placed on the PCa pillars 3 and 70 in a plurality of levels at a time. As for the other pillars, as shown in the above embodiment, the concrete is filled with the concrete in the single layer to secure the strength, and the other pillars of the layer are installed after the installation of the upper floor pillars. It is also possible to place concrete at the same time as the pillars on the upper floor. Therefore, it is possible to make a construction plan flexibly and to reduce the number of construction steps effectively.

  In the third modification, the PCa pillars 3 and 70 can be manufactured at a low cost in the same manner as in the above-described embodiment, and the construction man-hour is reduced by a realistic and easy-to-implement method. Needless to say, it is possible to improve the filling property of the concrete 42, to effectively ensure the filling property of the concrete 42, to realize a robust column beam structure, and the like. .

(Fourth Modification of Embodiment)
Next, the 4th modification of the column beam frame 1 shown as the said embodiment is demonstrated using FIG. FIG. 13 is an explanatory diagram of a column beam frame 80 in a fourth modification. The column beam frame 80 in the fourth modified example is different from the column beam frame 1 described above in that the end portion of the beam 5 is embedded by concrete 42 filled by press fitting.

  In the beam-column joining member 81 used in this modification, the outer shell body 82 has an extending portion 82a extending outward in the direction in which the joint member extends, that is, in the direction in which the beam 5 extends. The extending portion 82a has a beam insertion opening 82b. After installing the beam-column joining member 81 on the upright PCa column 3, as shown in FIG. 13A, the beam 5 is inserted through the beam insertion opening 82b of the beam-column joining member 81, Join the joint member.

  Thereafter, in addition to the internal spaces 3c and 83 of the PCa column 3 and the beam-column joining member 81, an end peripheral space 84 of the beam 5 located in the extension portion 82a is shown in FIG. 13B. Thus, the concrete 42 is press-fitted and filled.

  According to such a construction method, when the end portion of the beam 5 is made of steel reinforced concrete, the concrete placement in the space 84 around the end portion of the beam 5 is also performed in the internal space 3c of the PCa column 3 or the column beam joining member 81. Therefore, it is possible to reduce the number of work steps more effectively.

  In the fourth modified example, the PCa pillar 3 can be manufactured at a low cost as in the above-described embodiment, and the construction man-hour is reduced and the concrete 42 is filled by a method that is realistic and easy to implement. Needless to say, it is possible to improve the property, effectively ensure the filling property of the concrete 42, and realize a robust column beam structure.

(Fifth Modification of Embodiment)
Next, the 5th modification of the column beam frame 1 shown as the said embodiment is demonstrated using FIG. FIG. 14 is a perspective view of a beam-column joining member 85 used in the beam-column frame in the fifth modification. The column beam joint member 85 used in the column beam frame in the fifth modification is different from the column beam joint member 4 of the column beam frame 1 described above in that it does not include the hoop bars 23 shown in FIG. ing.

The column beam joining member 85 in the present modification does not include a hoop line, and therefore the joint member 86 penetrating the outer shell body 87 in the horizontal direction is constrained by the outer shell body 87.
The column beam frame in the present modification is constructed by the same construction method as in the above embodiment, using the column beam joining member 85 instead of the column beam joining member 4 used in the above embodiment.

  According to such a construction method, since the beam-column joining member 85 has a configuration that does not use a hoop line, the filling property of the concrete filled in the internal space 88 of the beam-column joining member 85 is further effectively improved. It becomes possible. In addition, it is not necessary to open a hole for inserting the hoop muscle such as the opening 20a shown in FIG. 3, and it is not necessary to install the hoop muscle itself, so that the construction can be performed more easily. is there.

  In the fifth modification, the PCa pillar 3 can be manufactured at a low cost in the same manner as in the above-described embodiment, and the construction man-hour is reduced by a realistic and easy-to-implement method. Needless to say, it is possible to achieve an effect such as that it is possible to increase the value.

(Sixth Modification of Embodiment)
Next, the 6th modification of the column beam frame 1 shown as the said embodiment is demonstrated using FIG. FIG. 15 is an explanatory diagram of the column beam frame 90 in the sixth modification. The column beam frame 90 in the sixth modified example is different from the above column beam frame 1 in that the outer shell body 92 of the column beam connecting member 91 is a steel pipe column, and the joint member 93 is formed of the outer shell body 92. The difference is that it does not penetrate and is joined to the outer surface of the outer shell 92.

  Steel plates 95 are joined to the top and bottom of the outer shell body 92. The steel plate 95 has a central opening 95a at the center and a main bar insertion opening 95b at a position corresponding to the main bar 10 of the PCa column 3. When the beam-column joining member 91 is installed on the PCa column 3, the main bar 10 of the PCa column 3 is inserted through each main bar insertion opening 95b of the upper and lower steel plates 95, and the upper end 10a of the main bar 10 is the upper steel plate 95. It is provided so that it may be located above.

  The column beam frame 90 in the present modification is constructed by the same construction method as in the above embodiment, using the column beam joining member 91 instead of the column beam joining member 4 used in the above embodiment. At the time of concrete press-fitting, after the concrete is filled into the internal space 3c of the PCa column 3, the concrete is filled into the internal space 94 of the column beam joint member 91 through the central opening 95a and the main bar insertion opening 95b of the lower steel plate 95. Concrete is filled.

  According to such a construction method, since the outer shell 92 of the beam-column joining member 91 functions as a steel pipe column, that is, a structural frame, it is possible to realize a stronger column-beam frame 90. Further, since the joint member 93 does not penetrate the outer shell 92, the filling property of the concrete filled in the internal space 94 of the column beam joining member 91 can be further effectively improved.

  In the sixth modification, the PCa pillar 3 can be manufactured at a low cost in the same manner as in the above-described embodiment, and the construction man-hour is reduced by a realistic and easy-to-implement method. Needless to say, it is possible to achieve an effect such as that it is possible to increase the value.

  In addition, the construction method of the column beam frame of the present invention is not limited to the above-described embodiment and each modification described with reference to the drawings, and various other modifications can be considered within the technical scope thereof. .

  For example, in the above-described embodiment and each modification, as shown in FIG. 2, the PCa pillar whose outer peripheral cross-sectional shape is rectangular and the internal space has a circular cross-sectional shape is used, but the present invention is not limited thereto. . For example, the cross-sectional shape of the outer periphery may be another shape such as a circle. Further, the cross-sectional shape of the internal space may have a substantially octagonal shape in which rectangular corners are slanted, as in the internal space 101 of the PCa pillar 100 shown in FIG. The shape may also be

  In the above embodiment and each modified example, the outer shell of the beam-column joining member is a steel plate or a steel pipe column. Instead, the outer shell is manufactured as a form frame using wood or plastic. The formwork may be removed after filling with concrete press-fitting.

Moreover, in the said embodiment and each modification, although the sealing member 31 was interposed between the PCa pillar and the beam-column joining member, instead of this, the joint part outer periphery of the PCa pillar and the beam-column joining member is Covering the joint with the sealing member from the outside may prevent the press-fitted concrete from flowing out.
Moreover, you may remove the sealing member 31 and a sealing member after hardening of the pressed-in concrete.

  Other than this, as long as the gist of the present invention is not deviated, it is possible to select the configuration described in the above-described embodiment and each modification, or to appropriately change to another configuration.

DESCRIPTION OF SYMBOLS 1 Column beam frame 3 Precast concrete (PCa) column 3a Column head 3b Upper end 3c Inner space 3d Press-fit opening 3e Lower end 3g Side surface 4 Column beam joining member 5 Beam 20 Joint member 21 Outer shell body 22 Internal space 31 Sealing member 40 Press fitting 42 Concrete 43 Concrete press fitting pipe 51 Beam-column joining member 52 Joint member 53 Outer shell 54 Anchor material 61 Precast concrete (PCa) column 61c Internal space 70 Second precast concrete (PCa) column 70b Upper end 70c Internal space 70g Side surface 72 Sealing member 80 Column beam frame 81 Column beam joint member 82 Outer shell body 82a Extending portion 82b Beam insertion opening 83 Inner space 84 Beam edge periphery 85 Column beam joint member 86 Joint member 87 Outer shell body 88 Inside Space 90 Column-beam frame 91 Column-beam joint member 92 Outer shell 93 Joint member 94 Internal space

Claims (5)

A method of constructing a column beam frame using a precast concrete column, in which a beam is joined to a column head of a precast concrete column that is erected using a column beam joint member,
The precast concrete column has an internal space whose upper end is open, and a press-fit opening that communicates the internal space with the outside is provided near the lower end of the internal space on the side surface of the precast concrete column. And
The beam-column joining member includes an outer shell body having an inner space with an upper end and a lower end opened, and a beam joining joint that is connected to the outer shell body in a horizontal direction and protrudes outward from the outer shell body. With components,
Erecting the precast concrete pillar,
Installing the beam-column joining member on the precast concrete column so that the internal spaces of both the precast concrete column and the beam-column joining member communicate with each other;
Press-fit concrete from the press-fit opening of the precast concrete column, and fill the internal space of both the precast concrete column and the column beam joining member;
A method of constructing a column beam structure using precast concrete columns. The joint member penetrates the outer shell in the horizontal direction,
An anchor material extending downward is fixed to the lower surface of the portion of the joint member located inside the outer shell,
The said anchor material used the precast concrete pillar of Claim 1 inserted in the said internal space of the said precast concrete pillar, when the said beam-column joining member is installed on the said precast concrete pillar. Construction method of column beam frame.   3. A sealing member is installed between the precast concrete column and the beam-column joining member that are erected, or on the outer periphery of the joint between the precast concrete column and the beam-beam junction member. Column beam frame construction method using precast concrete columns as described in 1. Before the concrete filling,
Installing a second precast concrete column having an internal space that opens in addition to the upper end in addition to the upper end, on the installed column beam connecting member;
Installing a second beam-column joining member on the second precast concrete column;
Including
In the press-fitting of the concrete, in addition to the internal spaces of the precast concrete columns and the beam-column joining members, the concrete is also added to the internal spaces of the second precast concrete columns and the second beam-column joining members. The construction method of the column beam frame using the precast concrete pillar as described in any one of Claim 1 to 3 to fill. The outer shell has an extending portion extending outward in the extending direction of the joint member, and the extending portion has a beam insertion opening,
Before filling the concrete, the beam is inserted through the beam insertion opening of the column beam joining member and joined to the joint member,
Including
In the press-fitting of the concrete, in addition to the internal spaces of the precast concrete column and the beam-column joining member, the concrete is also filled around the end portion of the beam located in the extension portion. 5. A method for constructing a column beam frame using the precast concrete column according to any one of 4 above.

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