JP2009293347A - Precast-concrete wall panel and its junction method - Google Patents

Abstract

The present invention provides a precast concrete wall panel that can be easily joined to a column beam and that does not impair the rationalization effect of precasting, and a joining method thereof.
A precast concrete wall panel 10 used as a wall of a building, which is arranged in a concentrated manner at the top and bottom inside the panel 10, respectively, and a horizontal stripe 12 projecting outside the panel 10 and arranged at the left and right outside the panel 10 Vertical muscles 14. When this panel 10 is built in the plane of the column beam frame, it is built at a predetermined interval on the lateral side of the column 4, and the horizontal stripes 12 projecting from the panel 10 to the spacing portion 18, While connecting the horizontal stripes 20 protruding from the pillars 4 to the gap portions 18 via the joints 24, the vertical stripes 14 having extensions that can be fixed to the beams 2 are collectively arranged in the gap portions 18. Concrete 28 is placed on the wall.
[Selection] Figure 1

Description

  The present invention relates to a precast concrete wall panel made of reinforced concrete that constitutes a wall body such as a doorway wall of a building structure and a method for joining the same.

  Conventionally, a reinforced concrete wall constituting a wall body such as a doorway wall of a building structure is known to be a wall body having a high construction rationalization effect due to precasting because the formwork area is usually large.

  As a method for joining such precast concrete wall panels, a method is known in which the reinforcing bars projecting from the recesses at the end of the panel are overlapped, and the recesses are filled with concrete and joined (for example, Patent Document 1). reference). Further, as a method for joining a precast wall panel and a column beam, a method of filling high-strength concrete in an interval portion is known (for example, see Patent Document 2). Furthermore, as a method of joining the upper and lower precast wall panels, a method is known in which a plurality of hooks protruding from the joining surface are overlapped with each other and joined to the hooks with a mortar through a rod-like member (see, for example, Patent Document 3). Moreover, the method of joining a precast wall panel and a floor with a some vertical reinforcement and mortar is known (for example, refer patent document 4).

JP-A-10-299135 JP 7-317159 A JP-A-9-273247 JP-A-6-306968

  By the way, the above-mentioned conventional precast concrete wall panel such as Patent Document 1 has many wall bars, and it takes time and effort to fix and join when building in the plane of the column beam frame, and a special joint is required. Therefore, it is an obstacle to precasting.

  In addition, when the beam is a precast member, an in-situ concrete portion is often provided at the joint between the beam and the wall panel. In this case, since it is necessary to secure this joining portion, the portion of the wall panel that can be precast becomes small, and the construction rationalization effect by precasting is impaired.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a precast concrete wall panel that can be easily joined to a column beam and that does not impair the rationalization effect of precasting, and a joining method thereof. And

  In order to achieve the above object, a precast concrete wall panel according to claim 1 of the present invention is a precast concrete wall panel used as a wall of a building, and is arranged in an integrated manner above and below the inside of the panel, It is characterized by comprising horizontal stripes that protrude outside the panel and vertical stripes that are collectively arranged on the left and right sides outside the panel.

  Moreover, the precast concrete wall panel which concerns on Claim 2 of this invention is further provided with the tension | tensile_strength material into which the prestress was introduce | transduced in Claim 1 mentioned above.

  In addition, the precast concrete wall panel according to claim 3 of the present invention is characterized in that, in the above-described claim 1 or claim 2, an engagement portion such as a shear cotter or a dowel bar is provided on the small edge surface.

  Moreover, the joining method of the precast concrete wall panel which concerns on Claim 4 of this invention embeds the precast concrete wall panel as described in any one of Claim 1- Claim 3 mentioned above in the surface of a column beam frame. The panel is built at a predetermined interval on the lateral side of the column, the horizontal stripe protruding from the panel to the interval portion, and the interval from the column corresponding to the horizontal stripe While connecting the horizontal bars protrudingly formed in the section through a joint, the vertical bars having an extension that can be fixed to the beam are collectively arranged in the gap section, and concrete is placed in the gap section. It is characterized by.

  The precast concrete wall panel joining method according to claim 5 of the present invention is the above-described method according to claim 4, wherein the concrete is placed on the gap portion before the beam on the upper side of the gap portion is laid. It is performed after a beam having a hole for placing concrete is erected.

  The precast concrete wall panel joining method according to claim 6 of the present invention is the above-described method according to claim 4, wherein the placing of the concrete into the space portion is performed by placing the concrete on the beam above the space portion. It is characterized by being performed simultaneously.

  Moreover, the joining method of the precast concrete wall panel which concerns on Claim 7 of this invention is the said any one of Claim 4-6. WHEREIN: The said panel is equipped with the tension | tensile_strength material arrange | positioned in the vertical direction, After the panel is built, the panel is fixed to the beam by introducing prestress into the tension member.

  A precast concrete wall panel joining method according to an eighth aspect of the present invention is the method according to any one of the fourth to seventh aspects, wherein the panels each having a tension member arranged in the vertical direction are vertically moved. The tension members are connected to each other.

  According to the present invention, the precast concrete wall panel is provided with the horizontal bars that are arranged in a concentrated manner on the upper and lower sides inside the precast concrete wall panel, and the vertical bars that are arranged on the outer sides of the panel. Can be joined to the column, and the panel can be joined to the beam via the horizontal and left and right vertical bars. For this reason, it is possible to omit the longitudinal bars for joining, which are disposed so as to protrude over the entire length in the longitudinal direction of the upper and lower ends of the conventional panel. In addition, the joints of the reinforcing bars are gathered up and down on the side of the panel where the horizontal bars are placed, so the work man-hours and labor involved in joining and fixing the reinforcing bars can be reduced, and the joining of the panel to the column beam can be reduced. Can be easily.

  In addition, since vertical bars do not protrude from the upper and lower end surfaces of the precast concrete wall panel, the panel can be easily joined even when the beam is a precast member. Furthermore, since there is no need to secure a space for cast-in-place concrete at the joint between the beam and the panel, the construction rationalization effect by precasting is not impaired.

  In addition, by introducing prestress to precast concrete wall panels, it is possible to increase the stability of the panel when it is installed on the column beam frame and to make the frame highly resilient to deformation due to vibrations such as earthquakes. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a precast concrete wall panel and a joining method thereof according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic front sectional view showing a precast concrete wall panel according to the present invention joined in a plane of a column beam frame.

  As shown in FIG. 1, a precast concrete wall panel (hereinafter referred to as “PCa wall panel”) 10 according to the present invention includes aggregated horizontal bars 12 and aggregated vertical bars 14 as aggregated reinforcing bars arranged around the periphery thereof. . The collective horizontal bars 12 are a plurality of relatively large-diameter reinforcing bars arranged substantially horizontally on the upper side and the lower side inside the panel 10.

  The aggregate vertical bars 14 are a plurality of reinforcing bars arranged substantially vertically on the left and right outer sides of the panel 10 and have extensions that can be fixed to the precast concrete beam (hereinafter referred to as “PCa beam”) 2. . The aggregate vertical bars 14 may be extended to the joint position when a wall continues on the upper floor. In the PCa wall panel 10, panel reinforcing bars 16 for preventing cracks, etc., indicated by dotted lines in the figure, are arranged in a lattice form vertically and horizontally.

  The PCa wall panel 10 is disposed at a predetermined interval between precast concrete columns (hereinafter referred to as “PCa columns”) 4. The collective horizontal stripes 12 protrude outward from the left and right sides of the panel 10 and extend to the interval portion 18. From the PCa column 4, the aggregated horizontal bar 20 and the joint bar 22 protrude from the PCa column 4 in correspondence with the aggregated horizontal bar 12 and extend to the interval portion 18. The aggregate horizontal bars 12 of the PCa wall panel 10 and the aggregate horizontal bars 20 of the PCa column 4 are connected to each other via a joint 24 at the interval portion 18. As the joint 24, a lap joint, a mechanical joint, a welded joint, a pressure joint, or the like can be used.

  The space | interval part 18 is the space enclosed by the PCa pillar 4, the PCa wall panel 10, and the PCa beam 2, and after the aggregated longitudinal bar 14 and the reinforcing bar 26 are arranged, the cast-in-place concrete 28 is placed. Thereby, the column beam 1 and the PCa wall panel 10 are joined. Further, a similar space 18 is formed in a space surrounded by two adjacent PCa wall panels 10 and the PCa beam 2. The aggregated vertical bars 14 and the reinforcing bars 26 are also arranged in the spacing portion 18 and the cast-in-place concrete 28 is placed. Thereby, adjacent PCa wall panels 10 and the beam 2 are joined.

  With the above-described configuration, the PCa wall panel 10 can be joined to the PCa column 4 and the PCa beam 2 via the aggregate horizontal bars 12 and the aggregate vertical bars 14. For this reason, it is possible to omit the vertical bars for joining that have been projected and disposed over the entire length in the longitudinal direction of the upper and lower ends of the conventional panel. Moreover, since the reinforcing bar which protrudes from the PCa wall panel 10 is only the aggregation horizontal bar | burr 12, the junction location of a reinforcing bar is concentrated on the upper and lower sides of the panel 10 side part. Therefore, it is possible to reduce the work man-hours and labor related to the joining and fixing of the reinforcing bars, and the joining of the panel 10 to the column beam 1 can be facilitated. Moreover, since the PCa wall panel 10 functions as an arch mechanism strut at the time of a load action, it is possible to create a state in which compressive stress is dominant in the panel 10.

  In the above embodiment, a shearing force or a dowel line as an engaging portion may be provided on the small face 30 around the PCa wall panel 10 to transmit a shearing force. Moreover, although the upper and lower end surfaces of the PCa wall panel 10 can be directly installed on the PCa beam 2, they may be fixed using a mortar, grout or the like. Further, in this case, the surface of the PCa wall panel 10 and the PCa beam 2 that touches the mortar or grout may be roughened.

  Moreover, in said embodiment, while the beam 2 constructs | assembles the part which the aggregated vertical bar | burr 14 passes on-site cast concrete by an on-site casting method, you may comprise the remaining beam part with a precast member. In this case, a sheath hole for inserting the vertical bars 14 is provided in the in-situ concrete portion of the beam 2.

  Further, in the above-described embodiment, the concrete placement with respect to the gap portion 18 may be performed before the upper beam 2 is spanned or after the beam having the placement hole is spanned. When the portion of the beam 2 adjacent to the interval portion 18 is of a type in which cast-in-place concrete such as half precast is driven, the beam 2 and the cast-in-place concrete 28 of the interval portion 18 may be simultaneously placed.

  Moreover, in said embodiment, it is good also as a structure which introduces prestress, such as a pretension, with respect to at least one of the panel reinforcing bars 16 in at least one of the vertical direction and the horizontal direction.

  Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a schematic front cross-sectional view showing an embodiment in which prestress is used to fix the panel to the PCa beam after the PCa wall panel is installed. FIG. 3 is a schematic front cross-sectional view showing an embodiment in which PC steel bars (prestressed steel bars) are connected in a multi-layer bearing wall. 2 and 3, the left and right PCa wall panels show variations of fixing positions.

  As shown in FIG. 2, PC steel bars 32 as tension members extend in the vertical direction on the left and right sides inside the PCa wall panel 10 arranged on the left side. A rebar may be used in place of the PC steel bar 32. An upper surface recess 34 for fastening a lock nut is formed at a position corresponding to the PC steel bar 32 on the upper end surface of the PCa wall panel 10, and a fixing insert 36 is recessed on each upper surface of the upper and lower beams.

  In this configuration, the PCa wall panel 10 is installed, the lower end of the PC steel bar 32 is installed in the fixing insert 36 of the lower beam 2, and the upper end of the PC steel bar 32 protruding from the upper surface recess 34 of the panel 10 is locked to the lock nut. Prestress is introduced into the panel 10 by fastening at 38. The panel 10 can be fixed to the lower beam 2 by introducing prestress. In addition to this, in addition to fixing the panel 10 at the time of installation, it is possible to provide a highly recoverable frame with small residual displacement after a large earthquake.

  On the other hand, like the PCa wall panel 10 arranged on the right side of FIG. While arranging so that it may protrude, a prestress may be introduced into panel 10 by fastening this upper end with lock nut 38.

  Further, as shown in FIG. 3, the PC steel bars 32 of the panel 10 disposed above and below the beam 2 in the multi-layer bearing wall 6 may be coupled to each other by a coupler 42 or the like. In this case, the coupler 42 may be provided on the beam 2 like the left PCa wall panel 10 to connect the upper and lower PC steel bars 32 to each other. Moreover, you may provide in the recessed part 40 of a U-shaped cross section by the front view provided in the up-down direction approximate center of the right-and-left both sides of the panel 10 like the right side PCa wall panel 10. By doing so, in addition to fixing the panel 10 at the time of erection, it is possible to provide a highly recoverable frame with extremely small residual displacement after a large earthquake.

  As described above, according to the present invention, since the horizontal bars protruding from the upper and lower sides of the PCa wall panel side and the vertical bars on the left and right sides of the panel are provided, the panel is provided via the horizontal bars and the vertical bars. Can be joined to the column beam. For this reason, since the joint location of a reinforcing bar is gathered up and down on the side of a panel, the work man-hours and labor concerning the joining and fixation of a reinforcing bar can be reduced, and joining of a panel to a column beam is facilitated. Can do.

  In addition, since vertical bars do not protrude from the upper and lower end surfaces of the panel, the panel can be easily joined even when the beam is a precast member. Furthermore, it is not necessary to secure a space for the cast-in-place concrete at the joint between the beam and the panel, and the construction rationalization effect by precasting is not impaired. Furthermore, by introducing pre-stress to the panel, it is possible to improve the stability during construction and to make the frame highly resilient to vibrations such as earthquakes.

It is a schematic front sectional view showing an example of a precast concrete wall panel according to the present invention. It is an example of the precast concrete wall panel which concerns on this invention, and is a schematic front sectional drawing in the case of utilizing a prestress. It is an example of the precast concrete wall panel which concerns on this invention, and is a schematic front sectional drawing in the case of utilizing a prestress in a multistory bearing wall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Column beam 2 Precast concrete beam 4 Precast concrete column 6 Multistory load-bearing wall 10 Precast concrete wall panel 12 Aggregate horizontal bar 14 Aggregate vertical bar 16 Panel reinforcement 18 Spacing part 20 Column horizontal bar 22 Joint bar 24 Joint 26 Reinforcement bar 28 Site Cast concrete 30 Small face 32 PC steel bar 34 Upper surface recess 36 Fixing insert 38 Lock nut 40 Recess 42 Coupler

Claims (8)

  It is a precast concrete wall panel used as a wall of a building, and is provided with a horizontal line that is arranged in a concentrated manner on the upper and lower sides inside the panel, and that protrudes to the outside of the panel, and a vertical line that is arranged on the left and right sides of the panel. Precast concrete wall panel characterized by that.   The precast concrete wall panel according to claim 1, further comprising a tension material into which prestress is introduced.   The precast concrete wall panel according to claim 1, further comprising an engaging portion such as a sheer cotter or a dowel bar on the small edge surface. A precast concrete wall panel according to any one of claims 1 to 3, wherein the precast concrete wall panel is built in a plane of a column beam frame and joined.
The panel is erected on the lateral side of the column at a predetermined interval, and the horizontal stripe protruding from the panel to the gap portion and the horizontal stripe formed to protrude from the column to the gap portion corresponding to the horizontal stripe. A precast concrete wall panel characterized in that, while being connected via a joint, the vertical bars having extensions that can be fixed to the beam are concentratedly arranged in the space portion, and concrete is placed in the space portion. Joining method.   5. The precast according to claim 4, wherein the placing of the concrete in the space portion is performed before laying the beam on the upper side of the space portion or after laying the beam provided with the hole for placing the concrete. Method for joining concrete wall panels.   The method for joining precast concrete wall panels according to claim 4, wherein the concrete is placed on the gap portion simultaneously with the concrete placement of the beam on the upper side of the gap portion.   The said panel is provided with the tension | tensile_strength material arrange | positioned in the vertical direction, The said panel is fixed to a beam by introduce | transducing prestress to the said tension | tensile_strength material after the installation of the said panel. The joining method of the precast concrete wall panel as described in any one of 6.   The precast concrete wall according to any one of claims 4 to 7, wherein the panels each having a tension member arranged in a vertical direction are arranged one above the other, and the tension members are connected to each other. Panel joining method.