JPH0266247A - Construction of on-site placing curtain wall - Google Patents

Abstract

PURPOSE:To prevent crack and the like from occurring by bolting a connecting member of an upper connection fitting slidably connected to an anchoring member in an outer wall at inner side to an upper horizontal member, and making the outer wall follow deformation on a structure body with regard to external force such as earthquake or wind pressure. CONSTITUTION:An upper connection fitting A is constituted with an anchor reinforcing steel 1, an outerside anchoring plate 3 welded with a whisker reinforcing steel 2 and drilled with a through hole, a fluororesin plate 5, a L-type hardware 8 and a connecting bolt 9'. Next, the hardware 8 of the fitting A arranged on upper part of an outer wall portion is connected to a large beam G on an upper flange portion with a bolt 9', and a lower connecting hardware B is welded to the upper flange. Next thereto, reinforcing steels are arranged in outer wall portion, form frames C, D are assembled on in-and outside, outer wall concrete is placed thereinto for constructing the outer wall W. The outer wall W is structurally isolated from a structure body, and the plate 3 and the hardware 8 are made to slide via the plate 5 when external force is acted. Therefore, crack and the like can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cast-in-place curtain wall construction method for constructing on-site a curtain wall that is a non-earthquake resistant wall on the outer wall of a building.

(Conventional technology) In steel-frame structures and high-rise buildings that undergo large deformations in response to horizontal forces such as seismic forces and wind pressure, construction methods that integrate external walls with the main structural parts of columns, beams, and floors Cracks or damage may occur due to forced deformation.

For this reason, in the case where the frame room of a building is made into a rigid frame structure and the outer wall is made into a non-seismic wall, and a structural plan is adopted in which the outer wall is not subjected to the above-mentioned forced deformation, the construction of the non-seismic wall is as follows. It is done as follows.

i) In rigid frame structures, half-slit joints are provided around non-seismic walls, or slits are provided in all joints, and the wall is structurally improved from the main structural parts of columns, beams, and floors! ! Record.

ii) Reduce the wall thickness of non-seismic walls that contact the main structural parts such as columns, beams, and floors, and reduce the number of reinforcing bars to prevent stress transmission between them and the surrounding structural parts.

1ii) 20 members such as a PC curtain wall are produced in advance at a factory, delivered to the site, joined and fixed to the main structure via metal fittings, and the metal fittings are made to follow deformation.

(Problems to be Solved by the Invention) However, the conventional construction method has the following problems.

i) When non-shear-resistant walls are integrated into the main structural parts of columns, beams, and floors, it is difficult to evaluate and adjust the rigidity of the non-shear-resistant walls, causing cracks and damage to the walls due to external forces such as earthquakes.

1i) When using the PC curtain wall method a) Since the PC curtain wall is manufactured in a factory, it is not possible to manufacture large panels due to restrictions on weight and transportation during manufacturing.

b) When accepting PC curtain walls, a large lifting machine is required.

c) Manufacturing PC curtain walls requires strict precision and control in the installation of metal fittings, product dimensions, etc.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to reduce the size of the panel compared to the conventional PC curtain wall without being restricted by the deformation of the frame body. To provide a cast-on-site curtain wall construction method that is not subject to any restrictions and eliminates the need for transporting and erecting a PC curtain wall.

(Means for Solving the Problems) In order to achieve the above object, the cast-in-place curtain wall construction method according to the present invention provides horizontal joints in each layer between horizontal members and vertical joints dividing the same layer as appropriate. At the upper part of the outer wall section defined by It is bolted to the frame member, and a lower joint fitting is provided at the lower part of the outer wall part, in which a joint piece is provided on the inner protrusion of the inner anchoring part of the outer wall, and the joint piece is welded to the lower horizontal member. After reinforcing reinforcing bars are arranged in the outer wall, formwork inside and outside the outer wall is assembled and concrete is poured.

The upper joint fitting has an outer anchoring plate to which the anchoring strip is welded, an intermediate fluororesin plate having a horizontal groove bored therein, and a horizontal groove bored in the vertical part, The horizontal piece consists of an outer L-shaped metal piece with through holes for connecting bolts for the horizontal members, and is loosely inserted into the vertical piece of the L-shaped metal piece and each horizontal slot in the fluororesin plate. A connecting bolt is screwed onto the outer anchoring plate.

In addition, the lower joint fitting has a horizontal joint piece for the horizontal member welded to the inner end of the vertical piece extending across the inside and outside of the outer wall, and an anchoring strip welded to the outer part located inside the outer wall. It is configured.

(Function) According to the present invention, under one layer of the outer wall defined by the horizontal joints in each layer between the horizontal members and the vertical joints obtained by dividing the same layer as appropriate, the outer wall concrete Upper and lower joint fittings having an anchoring part in the outer wall to be anchored to are arranged, and the joining piece provided on the inner protrusion of the inner wall anchoring part in the lower fitting is welded to the lower horizontal member, and By bolting the joint piece, which is slidably layered on the inside of the inner wall anchoring part of the joint metal fitting, to the upper horizontal member, both the upper and lower joint metal fittings are fixed in a predetermined position, and then the external wall concrete is attached. By pouring the upper joint metal fittings into the outer wall, the upper joint metal fittings are anchored in the outer wall through the internal anchoring parts of each outer wall, and the upper joint metal fittings are anchored in the outer wall concrete against horizontal forces such as earthquakes and wind pressure. By sliding the joint piece bolted to the upper horizontal member against the anchoring part in the outer wall, the outer wall follows the deformation of the structural frame, preventing the occurrence of cracks or damage.

(Example) The illustrated example in which the present invention is applied to a cast-in-place curtain wall construction method for a steel frame structure will be described below.

(G) is a cast-in-place reinforced concrete external wall of a non-earthquake-resistant wall, defined by horizontal joints (a) in each layer between horizontal members and vertical joints CI)) that divide the same layer appropriately; The upper joint fittings will be installed when the wall is constructed.

The upper joint fitting (^) is an anchor consisting of an anchor reinforcing bar (1) with a screw hole (1a) formed at one end and a hook part (1b) at the other end, and a beard reinforcing bar (2). The outer anchoring plate (3) is welded with reinforcement and has a through hole communicating with the screw hole (1a), and a fluororesin plate (Teflon plate) has a horizontal groove (4). ) (5) and the L-shaped hardware (8) with horizontal slots (6) drilled in the vertical part and through holes (7) for connecting bolts in the horizontal part are layered. L
Each horizontal slot (
6) Insert the connecting bolt (9) loosely inserted into (4) into the screw hole (1) of the anchor reinforcing bar (1) in the outer anchoring plate (3).
a). Therefore, L-shaped hardware (8)
is slidably joined to the outer anchoring plate (3).

(B) is a lower joint fitting, and the inside end of the vertical piece (9) that extends across the inside and outside of the outer wall is the horizontal joint piece 0 for the horizontal member.
Il) is welded, and a vertical anchoring strip 01) is welded to the outer part located in the outer wall.

The through hole (7) provided in the horizontal part of the L-shaped metal fitting (8) of the upper joining fitting (^) and the Ht that constitutes the horizontal member
The bolt surface is inserted and tightened across the horizontal gazette plate Q21 disposed on the web of the Jil steel frame Mahayana (G), and the upper joint fitting (A) is joined to the girder (G).

In addition, the horizontal joint piece 0Il) of the lower joint fitting (B) is
Welded to the upper flange of the steel girder (G) made of H-shaped steel that constitutes the lower horizontal member, and the lower joint fitting (
B) is joined.

Next, apply a styrofoam joint material round to the horizontal joints of the outer wall, and a vertical joint material with slits to the vertical joints.
are provided respectively. 06) in the figure is horizontal joint caulking material, 0
``7) is a vertical joint caulking material.

(See Figures 5 and 6) Furthermore, reinforcing steel bars (not shown) are placed on the outer wall, and the inner and outer forms (C) and (D) are assembled, and the outer wall and upper steel girder (G) are assembled. The gap is closed with iron plate 08), and the upper joint metal fitting (08) is used to close the gap.
^) Styrofoam piece 09 up to the surface of the outer anchor plate (3)
1 to prevent concrete from flowing into the steel girder side.

Next, in order to structurally insulate the outer wall and the slab (S) at the bottom of the outer wall, an L-shaped concrete stopper CI is installed at the end of the slab (S), and a fireproof material ( 21).

After assembling the inner and outer formwork (C) (11) as described above, external wall concrete is poured into both formworks, and after the poured concrete has hardened, it is removed from the mold and cast-in-place reinforced concrete external wall ( Build a

Fig. 5 shows the horizontal joint treatment after demolding, in which the Styrofoam joint material 04) is removed to the depth of the joint waterproofing, a back-up material (not shown) is inserted, and the caulking material 00 is used to waterproof the joint. do.

The exterior finishing is done by the tile driving method, post-pasting method, or spraying method, and (22) in the figure is the exterior finishing material.

The cast-in-place reinforced concrete outer wall (B) constructed as described above is structurally insulated from the structural frame, and is connected to the outer anchoring plate (3) of the upper joint Fi (A) anchored to the wall of the outer wall and the steel frame. By sliding the L-shaped hardware (8) joined to the girder (G) through the intermediate fluororesin plate (5),
Even if an earthquake or wind pressure acts on it, it will follow the deformation of the structure and prevent cracks and
According to the above-described method, a cast-in-place reinforced concrete external wall can be constructed without causing any damage, which has the function of a curtain wall, has a free size, and does not require a large lifting machine.

(Effects of the Invention) According to the present invention, as described above, upper and lower joint fittings each having an anchoring part within the outer wall that is anchored to the concrete of the outer wall are disposed above and below the outer wall, and the outer wall at the lower joining fitting is arranged. The joint piece provided on the inner protrusion of the inner anchor part is welded to the lower horizontal member, and the joint piece slidably layered on the inner side of the outer wall inner anchor in the upper joint fitting is attached to the upper horizontal member. By bolting the walls together, the non-earthquake-resistant walls are made into cast-in-place reinforced concrete walls, which follow the deformation of the frame due to external forces such as earthquakes and wind pressure, and prevent cracks and damage from occurring.

In addition, by constructing cast-in-place reinforced concrete external walls that are not earthquake-resistant, the size of the panels can be changed more freely than with conventional PC curtain walls, making it possible to increase the size of the panels and simplifying the conventional mounting hardware. It is possible to reduce the quantity used.

Furthermore, there is no need for a lifting machine for transportation and erection as in the conventional PC curtain wall, resulting in a reduction in construction costs.

The invention according to claim 2 provides an outer anchoring plate to which an anchoring muscle is welded;
It has an intermediate fluororesin plate with horizontal grooves drilled therein, and L-shaped metal fittings in which horizontal grooves and through holes for connecting bolts for the horizontal members are drilled in the vertical and horizontal parts, respectively. , the vertical part of the same L-shaped hardware and the joining bolts loosely inserted into the respective horizontal slots of the fluororesin plate were screwed to the outer anchoring plate to form the upper joining hardware, so that the construction of the non-seismic wall The cast reinforced concrete exterior wall is bonded to the building frame so that it can follow the deformation of the building block due to external forces such as earthquakes and wind pressure.

The invention of claim 3 provides a non-earthquake resistant structure by welding a horizontal joint piece to the horizontal member to the inner end of the vertical piece extending across the inside and outside of the outer wall part, and an anchoring reinforcement to the outer wall concrete to the outer part. The cast-in-place reinforced concrete outer wall of the wall can be easily and reliably joined to the lower horizontal member.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing the implementation status of one embodiment of the cast-in-place curtain wall construction method according to the present invention, Fig. 2 is a front view of the cast-in-place curtain wall constructed by the method of the present invention, and Fig. 3 is 4 is an enlarged view of the main part of FIG. 3, FIG. 5 is a longitudinal side view showing the horizontal joints of the outer wall, FIG. 6 is a cross-sectional plan view showing the vertical joints of the outer wall, and FIG. The figure is an exploded perspective view of the upper joint metal fitting, and FIG. 8 is a perspective view of the lower joint metal fitting. (^) - Upper joint fitting (B) - Lower fitting (C) (D) - Formwork (G) - Steel girder (W) - External wall (a) - - Horizontal joint (B)...-Vertical joint (B)...Welded part (1)...Anchor reinforcing bar (2)...Beard reinforcing bar (3)...Anchor plate (4)...- Horizontal slot (5)...Fluororesin plate (6)...Horizontal slot (7)...Through hole for joining bolt (8) - L-shaped metal fittings (via) - Joining bolt (9) -・Vertical piece Gl--Horizontal joint piece 00--Anchoring muscle 0--Horizontal gusset plate 03)--Bolt shoulder 1 Thickness A2 Attorney Patent attorney Shige Okamoto 2 extras J! 6 prisoners

Claims (3)

[Claims] (1) The upper part of the outer wall defined by the horizontal joints in each layer between the horizontal members and the vertical joints divided into the same layer as appropriate, has a movable structure that can be slid inside the inner wall anchorage. At the same time, an upper joint fitting in which joint pieces are stacked is provided, and the joint pieces are bolted to the upper horizontal member, and a joint is attached to the inner protrusion of the inner anchoring part of the outer wall at the lower part of the outer wall. After arranging the lower joint fittings with the pieces, welding the joint pieces to the lower horizontal members, and arranging reinforcing reinforcing bars on the outer wall, assemble the formwork inside and outside of the outer wall and concrete. A cast-in-place curtain wall construction method characterized by pouring. (2) The upper joint fitting has an outer anchoring plate to which the anchoring strip is welded, an intermediate fluororesin plate having a horizontal groove bored therein, and a horizontal groove bored in the vertical part; The horizontal piece consists of an outer L-shaped metal piece with through holes for connecting bolts for the horizontal members, and is loosely inserted into the vertical piece of the L-shaped metal piece and each horizontal slot in the fluororesin plate. 2. The cast-in-place curtain wall construction method according to claim 1, wherein a joining bolt is screwed onto the outer anchor plate. (3) In the lower joint fitting, a horizontal joint piece for the horizontal member is welded to the inner end of the vertical piece that extends across the inside and outside of the outer wall, and an anchoring strip is welded to the outer part located inside the outer wall. The cast-in-place curtain wall construction method according to claim 1, wherein the cast-in-place curtain wall construction method is constructed as follows.