JP2008240243A - Mounting method for spandrel wall made of precast concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a precast spandrel wall for being mounted between supports to be mounted by only operations from the indoor side. <P>SOLUTION: A fitting groove 4 is formed in the direction of the arrangement of the supports 1 in such a manner as to be positioned on the top surface of the foundation 3 and on the outside of the support 1. A fitting protrusion 6 for being fitted into the fitting groove 4 is formed at the lower end of the precast spandrel wall 5. A hook 8 is protrusively provided on the lower inside surface of the precast spandrel wall 5. On the outside of the support 1, precast spandrel wall 5 is erected by fitting the fitting protrusion 6 of the precast spandrel wall 5 into the fitting groove 4, and an upper section of the precast spandrel wall 5 is temporarily held on the support by a bolt joining means. Subsequently, a crowbar 20 is hooked on the hook 8 of the precast spandrel wall 5, so that the positioning of the precast spandrel wall 5 can be performed by means of the crowbar 20. After the positioning of the precast spandrel wall 5, the bolt joining means for the upper section of the precast spandrel wall 5 is finally tightened so that the precast spandrel wall can be mounted on the support 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for attaching a waist wall made of precast concrete.

  Conventionally, in a building, a precast concrete waist wall (hereinafter referred to as a PCa waist wall) that constitutes an outer wall between pillars of the first floor portion is sometimes attached.

  As a method for attaching such a PCa waist wall, there is a conventional method using an attachment structure as shown in FIG.

  In this conventional mounting method, first, the PCa waist wall 103 is temporarily placed on the foundation 101 between the steel columns 102 and 102 erected on the foundation 101 portion, outside the steel pillar 102. In this temporary placement state, the height adjusting member 104 is placed on the foundation 101 and the PCa waist wall 103 is stood on the height adjustment member 104, and the upper portion of the PCa waist wall 103 is attached to the mounting iron plate 105 provided on the PCa waist wall 103. Is temporarily held by temporarily welding W1 to the mounting piece 106 fixedly welded to the steel column 102.

  Next, a jig such as a bar is engaged with the outer lower edge 107 of the PCa waist wall 103 to perform the position adjustment operation of the PCa waist wall 103 in the front-rear direction and the left-right direction.

  After that, the mounting iron plate 108 fixed to the lower part of the PCa waist wall 103 is welded to the reinforcing bar 109 standing on the foundation 101, and the mounting iron plate 105 is finally welded to the mounting piece 106, and the PCa waist wall 103 is fixed. Secure in place.

  In the conventional PCa waist wall mounting method (structure), since it is an on-site welding operation, there is a problem that the welding operation is difficult and quality assurance is also difficult.

  Furthermore, the construction work must be performed from both the inside and outside of the PCa waist wall 103, and the work from the outside is required.

  Furthermore, if a jig such as a bar is engaged with the lower edge 107 of the PCa waist wall 103 and the position adjustment operation is performed, there is a problem that a crack or a defect occurs in the lower edge 107.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a PCa waist wall mounting method that solves the above-described problems.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a mounting method in which a precast concrete waist wall (hereinafter referred to as a PCa waist wall) is disposed between a plurality of support columns, and is attached in the arrangement direction of the plurality of support columns. A fitting groove is formed on the upper surface of the provided foundation on the outer surface of the support column along the arrangement direction of the support column, and the lower surface of the PCa waist wall is fitted with the fitting groove. A hook is provided on the inner surface of the lower portion of the PCa waist wall, and the upper portion of the PCa waist wall and the column have bolt joining means for joining them, and the PCa waist wall is connected to the lower end thereof. The fitting projections of the PCa are fitted upright in the fitting groove, and then the upper part of the PCa waist wall is temporarily fixed to the support by the bolt joining means, and then the bar is engaged with the hook from the indoor side. Stop and move the bar to adjust the position of the PCa waist wall Then, the PCa waist wall is attached by attaching the upper part of the PCa waist wall by the bolt joining means and attaching the PCa waist wall.

  According to a second aspect of the present invention, in the first aspect of the present invention, the bolt connection is performed using an L-shaped fixture, and one horizontal piece is bolted to the upper surface of the PCa waist wall, and the other vertical piece is joined. Is configured to be bolted to the support.

  A third aspect of the invention is characterized in that, in the second aspect of the invention, a one-side bolt is used as a bolt for attaching the L-shaped fixture to a column.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the hook is formed in an annular shape or a U-shape.

  According to the first and second aspects of the present invention, since welding is not used for attaching the PCa waist wall, the work is easier than the conventional welding work, and the quality is easily ensured.

  Furthermore, the PCa waist wall position adjustment work can be performed from the indoor side by using the bar, and further, the upper part of the PCa waist wall can be attached indoors, so that the safety of the work can be achieved.

  Furthermore, since a hook is provided on the PCa waist wall and a bar is locked to the hook to adjust the movement of the PCa waist wall, the PCa waist wall is not cracked or chipped as in the prior art.

  According to the third aspect of the present invention, the upper portion of the PCa waist wall can be bolted even when the column is a square steel pipe in which the nut cannot be tightened from the inside.

  According to the fourth aspect of the present invention, the front / rear and left / right positions of the PCa waist wall can be easily adjusted by the bar.

The best mode for carrying out the present invention will be described based on the embodiment shown in FIGS.
FIG. 1 is a side sectional view in which a precast concrete waist wall (referred to as PCa waist wall) of the present invention is installed between columns.

  In FIG. 1, a column 1 is a column erected on the boundary between an inner side A and an outer side B of the building, and the column 1 is formed of a steel column made of a square steel pipe whose cross-sectional shape is a square, The lower part is fixed to the base part by the base plate 2. Further, a plurality of the support columns 1 are arranged with a predetermined interval in the front and back direction with respect to the paper surface of FIG. In addition, the column 1 may use H-shaped steel or the like.

  Near the lower portion of the support column 1, a concrete foundation 3 is provided in the arrangement direction of the plurality of support columns 1 (the front and back direction of the paper surface of FIG. 1). That is, the foundation 3 is located on the boundary between the inner side A and the outer side B of the building and constitutes an outer foundation.

  Further, the upper surface of the foundation 3 is formed from a substantially middle portion of the support column 1 to a position protruding from the outer surface of the support column 1, and the surface that protrudes outward from the support column 1 on the upper surface has an opening on the upper surface. A fitting groove 4 is formed. The fitting groove 4 is formed over a predetermined length in the longitudinal direction (the front and back direction of the paper surface) of the foundation 3 that is the arrangement direction of the support columns 1, that is, the length in which a PCa waist wall 5 described later is disposed.

Next, the PCa waist wall 5 will be described.
The PCa waist wall 5 has a predetermined left and right length, height and thickness. As shown in FIGS. 1 and 2, on the lower surface of the PCa waist wall 5, a fitting protrusion 6 that protrudes downward in a shape that fits into the fitting groove 4 is parallel to the side surface of the PCa waist wall 5. And it is formed over the entire length.

  Further, a long nut-like insert 7 is embedded in the lower portion of the PCa waist wall 5, and a screw hole end of the insert 7 is opened on the inner side surface of the PCa waist wall 5. A hook 8 having a bolt 8 a is fixed to the insert 7 by screwing the bolt 8 a to the insert 7, and the hook 8 is fixed so as to protrude from the inner surface of the PCa waist wall 5. As shown in FIG. 3, the hook 8 is formed in an annular shape made of metal. A plurality of hooks 8 are provided, for example, two in the vicinity of both ends in the left-right direction of the PCa waist wall 5 (the front and back direction of the paper). Moreover, the hook 8 is provided in the state which the center hole penetrates to an up-down direction, as shown in a figure.

  A long nut-like insert 9 is embedded in the upper surface portion of the PCa waist wall 5, and a screw hole end of the insert 9 is open to the upper surface of the PCa waist wall 5. And as shown in FIG. 4, the horizontal piece 10a of the fixture 10 which bent the metal plate in the L shape penetrates the volt | bolt 11 to the attachment hole 10b formed in this, and the volt | bolt 11 is inserted into the said insert 9 It can be fixed to the upper surface of the PCa waist wall 5 by being screwed onto the PCa waist wall 5. The diameter of the mounting hole 10b is larger than the thread diameter of the bolt 11 and smaller than the diameter of the washer 12, so that the mounting position of the mounting tool 10 with respect to the PCa waist wall 5 can be adjusted. It has become.

  A mounting hole 10 d is formed in the other vertical piece 10 c of the mounting tool 10. Then, as shown in FIG. 1, the fixture 10 is fixed to the column 1 by inserting the mounting hole 10 d of the other piece 10 c into the bolt 13 attached to the column 1 and screwing the nut 14 into the bolt 13. It can be done. The diameter of the mounting hole 10d is set to be larger than the threaded portion diameter of the bolt 13 and smaller than the diameter of the washer 14, so that the mounting position of the other piece 10c with respect to the column 1 can be adjusted.

  For example, a one-side bolt is used as the bolt 13. As the one-side bolt, for example, as shown in FIG. 5, a locking cylinder 13b having a head 13a at the tip of the bolt 13, a metal cylinder on the outer periphery of the threaded portion of the bolt, and a slit formed in a part thereof. Is inserted into the mounting hole 1a formed in the support column 1 from the outside of the support column 1 as shown in the figure, and the outer end 13c of the bolt 13 is pulled outward by a dedicated screwdriver, whereby the locking cylinder 13b is In addition, a structure in which the head 13a and the washer 13d are bent and plastically deformed as shown by a chain line in FIG. 5 to prevent the bolt 13 from coming off is used.

  The insert 9, the bolt 10, the fixture 11, the bolt 13, and the nut 14 constitute a bolt joining means 30.

  In FIG. 1, 15 is a level adjusting member interposed between the fitting groove 4 and the fitting projection 6, 16 is a mortar, 18 is a draining plate, and 19 is an outer wall finishing material. A bar 20 is used for adjusting the position of the PCa waist wall 5 and is generally referred to as a charging bar.

Next, a method for attaching the PCa waist wall 5 will be described.
First, the level adjusting member 15 is partially disposed in the longitudinal direction of the fitting groove 4 on the bottom surface of the fitting groove 4 of the foundation 3 and the mortar 16 is laid in the fitting groove 4.

  Next, the PCa waist wall 5 to be installed is suspended by a crane or the like, placed on the outer side of the column 1, and the fitting protrusion 6 formed on the lower surface thereof is placed in the fitting groove 4 of the foundation 3 to adjust the level. Place on member 15 and fit.

  Next, the mounting hole 10b of the piece 10a of the fixture 10 is matched with the insert 9 of the PCa waist wall 5, and the bolt 11 is temporarily tightened to the insert 9 through the mounting hole 10b.

  Next, the other piece 10c of the fixture 10 is inserted into the bolt 13 of the one-side bolt through the attachment hole 10d, the one-side bolt is inserted into the support column 1, and the bolt 13 is pulled outward by a dedicated screwdriver, 13b is bent in an incomplete state and temporarily tightened. Thereby, the upper part of the PCa waist wall 5 is temporarily held by the support column 1.

  The temporary holding operation of the upper portion of the PCa seat 5 by the bolt joining means 30 can be performed from the inside (inside the room) of the PCa waist wall 5 through the space between the columns 1 and 1.

  Next, on the inner side (inner side) of the PCa waist wall 5, the tip bending point C of the charging bar 20 is applied to the upper surface of the foundation 3 as shown in FIG. Is hooked through the hole of the annular hook 8 projecting from the PCa waist wall 5. In this state, when the gripping side of the charging bar 20 is moved up and down as shown by the arrow, the hook 20a moves in the front-rear direction with the contact point C with the foundation 3 as a fulcrum, and the lower part of the PCa waist wall 5 via the hook 8 Moves in and out of the room. In addition, the PCa waist wall 5 can be moved in the left-right direction (column row direction) by the charging bar 20.

  Therefore, the operator can finely adjust the position of the PCa waist wall 5 in the front-rear direction and the left-right direction with the charging bar 20 while being positioned indoors. Further, by using the charging bar 20, fine adjustment can be easily performed using the principle of leverage.

  At the time of the fine adjustment, since the mounting holes 10b and 10d of the fixture 10 arranged on the upper portion of the PCa waist wall 5 are formed to have a larger diameter than the bolts 11 and 13, the fine adjustment of the PCa waist wall 5 is performed. It is possible to move.

  After fine adjustment of the front and rear and left and right, the bolt 11 is finally tightened from the room side through the space between the columns 1 and 1 and the nut 14 of the one side bolt is finally tightened by a dedicated screwdriver and finally joined to the PCa waist wall 5. Is fixed in place.

  And after the installation work of said PCa waist wall 5 is complete | finished, as shown in FIG.

  Then, the concrete 23 on the first floor is placed up to F1. Due to the hardening of the concrete 23, the anchor bars 22 are embedded in the floor concrete 23, and the PCa waist wall 5 is firmly held.

  In addition, since the support | pillar 1 is a square steel pipe, the said bolt 13 used the one side bolt, but when the support | pillar 1 can tighten | tighten a volt | bolt and a nut from both inside and outside, such as H type steel, The bolt 13 may be a normal bolt and nut.

  Further, the mounting hole 10b in the mounting tool 10 may be a long hole in the front-rear direction, and the mounting hole 10d may be formed as a long hole in the vertical direction.

  Further, as shown in FIG. 7, the hook 8 is bent in a U shape to form a hook portion 8b, and the hook 8A is bent outward to form a locking portion 8c. The hook portion 8b may protrude from the PCa waist wall 5 and the base portion 8c side may be embedded in the PCa waist wall 5.

  According to the hook 8A, it can be formed at a lower cost than the hook 8 shown in FIG.

The side sectional view showing the example of the present invention. The perspective view which shows the fitting protrusion of the PCa waist wall in FIG. The top view which shows the hook in FIG. The perspective view which shows the fixture in FIG. The expanded side sectional view which shows the attachment state of the volt | bolt 13 in FIG. FIG. 3 is a side view of the hook shown in FIG. The top view which shows the other Example of a hook. Side sectional drawing which shows the attachment structure of the conventional PCa waist wall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support | pillar 3 Base 4 Fitting groove 5 PCa waist wall 6 Fitting protrusion 8, 8A Hook 10 Mounting tool 11, 13 Bolt 30 Bolt joining means

Claims (4)

In an attachment method in which a precast concrete waist wall (hereinafter referred to as PCa waist wall) is disposed between a plurality of support columns, the top surface of a foundation provided in the arrangement direction of the plurality of support columns, , A fitting groove is formed along the arrangement direction of the columns, a fitting protrusion is formed on the lower surface of the PCa waist wall, and a hook is formed on the inner side surface of the lower portion of the PCa waist wall. The upper part of the PCa waist wall and the column have bolt joining means for joining them, and the PCa waist wall is stood by fitting the lower end of the fitting protrusion into the fitting groove. After that, the upper part of the PCa waist wall is temporarily fixed to the column by the bolt joining means, and then the bar is locked to the hook from the indoor side and the bar is moved to adjust the position of the PCa waist wall. After that, the upper part of the PCa waist wall is connected to the bolt joining means Mounting method precast concrete waist wall, characterized in that to attach the PCa spandrel more main bonding to. The bolt joint is constructed using an L-shaped fixture, wherein one horizontal piece is bolted to the upper surface of the PCa waist wall, and the other vertical piece is bolted to the column. Item 4. A method for attaching a precast concrete waist wall according to item 1. The method for attaching a waist wall made of precast concrete according to claim 2, wherein a one-side bolt is used as a bolt for attaching the L-shaped fixture to a support column. The method for attaching a waist wall made of precast concrete according to any one of claims 1 to 3, wherein the hook is formed in an annular shape or a U-shape.

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