JPS6033213Y2 - Precast reinforced concrete semi-finished products for external walls - Google Patents

Description

[Detailed description of the invention] This invention has a thin flat part formed with a wall thickness thinner than the structural outer wall of a building, and the outer surface of the thin flat part is finished, and the inner surface of the thin flat part is finished. In this method, a part of the reinforcing bars protrudes toward the inside of the building, and while the reinforcing bars are kept erected at the site, wall reinforcements are placed inside the reinforcing bars that are integrally connected with the protruding reinforcing bars. The present invention relates to a semi-finished product for precast reinforced concrete exterior walls, which constructs a structural exterior wall with openings by integrally joining it with concrete to be installed.

When constructing the structural exterior walls of high-rise buildings, this type of semi-finished exterior wall products require a shorter curing period than when constructing the entire exterior wall with cast-in-place concrete and finishing the exterior on-site. By using this semi-finished product, which has been finished in advance, as the outside formwork, it is much more efficient, and the weight of the precast reinforced concrete exterior wall, which has the same thickness as the exterior wall from the beginning, is much higher. Compared to the case of connecting finished products side by side, it is easier to transport and erect on site because it is lightweight, and the connection strength between items placed side by side is high, making it possible to streamline factory production and on-site work. Excellent effects can be achieved based on combinations of

However, in conventional semi-finished products for exterior walls of this kind that form window openings, the sash frame to be attached to the inner peripheral part is constructed separately from the semi-finished exterior wall products, and the frame is not assembled at the site. A satsushi frame was installed.

As a result, there is a problem in that installing the sash frame requires time and effort, and distortion occurs in the area around the window opening, which is the weak point of the semi-finished product. It has been pointed out that there is a problem that warpage is likely to occur, and that only the peripheral portion is thick, making it difficult for poured concrete to go around the underside, resulting in a decrease in strength.

The precast reinforced concrete semi-finished product for external walls according to the present invention was developed in view of the above-mentioned circumstances, and has the structure described above, in which a sash frame is embedded and fixed in advance in the inner periphery of the opening, and the sash frame is embedded and fixed in the area around the embedded sash frame. It is characterized in that a portion below the sash frame is thicker than the thin flat portion and has the same or approximately the same thickness as the outer wall.

In other words, since the sash frame is buried and fixed in advance, not only can the conventional on-site installation work be omitted, but the rigidity of the sash frame that has been buried and fixed can be used to strengthen the area around the opening, which is the weak point. By reinforcing the entire semi-finished product, it can be prevented from warping or slightly increased in rigidity.In addition, it is possible to suppress the deformation of the sash frame itself, and it is possible to pour concrete not only in the surrounding area but also in the lower part. By creating an unnecessary thick wall and avoiding a decrease in strength due to insufficient wrapping, we have been able to improve workability as a whole, as well as improve product accuracy and construction accuracy.

□Explaining the embodiment of the present invention based on the drawings, as shown in Fig. 1, finishing 1 is applied to the outer surface by pasting tiles 1a, coating with mortar, etc.
A part of the embedded reinforcing bar 2 is projected inward, and the opening 3 is
A sash frame 4 is buried and fixed in the inner peripheral part of the sash frame 4, and the peripheral part 5 where this sash frame 4 is buried and the lower part 6 of the sash frame 4 are the same as or almost the same as the structural outer wall W to be constructed on site, which will be described later. This is the same thickness as precast reinforced concrete semi-finished product A for external walls, and the specific structure will be described in detail below.

Reference numeral 7 refers to a thin flat portion excluding the peripheral portion 5 and the lower portion 6, and there are hanging tools (crane hooks) near both ends of the upper end of the inner surface.

As shown in FIG. 2, connecting fittings 8, 8, which also serve as a locking function for the lower semi-finished product A, are embedded and fixed in an upwardly protruding state, and near both ends of the lower end side of the inner surface thereof, The connected metal fittings 9.9 to the connecting metal fittings 8, 8 are connected to the connecting metal fittings 8.8.
It is buried and fixed deep inside the recesses 10, 10 for dropping.

Near the upper ends of both left and right sides of the inner surface of the peripheral portion 5, as shown in FIG. 4, connecting fittings 11.11 for connecting to erection supports 20.20, which will be described later, are embedded and fixed.

On the inner surface of the thin flat portion 7, as shown in FIGS. 2 and 3, there are threaded or welded connecting fittings 12 for the traction separators 21 of the concrete casting formwork 26, which will be described later. It is buried and fixed in an inwardly protruding state.

A groove 13 is formed around the thin flat portion 7, as shown in FIG. 4, into which a later-described joint material 22 is inserted and fitted.

Further, as shown in FIGS. 2 and 4, in the peripheral portion 5, connector reinforcements 14 for connecting to the poured concrete 31 are embedded and fixed at appropriate intervals in a protruding posture parallel to the flat portion 7. There is.

Near both left and right ends of the lower surface of the lower part 6, as shown in FIG.
15 is embedded and fixed above the recesses 16, 16.

The reinforcing bars 2 buried in the flat portion 7 are preferably assembled as shown in FIG. 5, which are called omniar reinforcing bars.

A similar reinforcing bar 2' is used at the peripheral portion 5 as shown in FIG.
It is also completely buried and fixed.

Further, a square loop-shaped reinforcing bar 2# as shown in FIG. 2 is embedded and fixed in the lower part 6 as well.

Next, construction procedures using the precast reinforced concrete outer wall semi-finished product A having the above-mentioned structure will be explained according to 1 to 1 of FIG. 6.

(b) Establish the reference line by marking out.

(b) Along the reference line, move the semi-finished product A for the exterior wall to the support 2.
Build using 0.20.

(c) Screw or weld the separators 21 to the connecting fittings 12 (see FIGS. 2 and 3).

2) Perform joint treatment using joint material 22 between adjacent semi-finished products A and A (see Fig. 4).

Additionally, equipment piping will be laid.

(e) Assemble the column bars 23 on the inside of the semi-finished products A and A.

(f) The wall reinforcements 24 and the beam reinforcements 25 are assembled into a state in which the protruding reinforcing bars 2a of the semi-finished product A are strongly and integrally connected (see FIG. 4).

(G) While rebuilding the semi-finished product A, erect the formwork 26 in contact with the inner surface of the peripheral portion 5 via the separators 21 and the supporting metal fittings 27 (see Figures 2 and 3). reference).

Also, the beam formwork 28 and the slab formwork 29 are assembled using supports 30.

(Publication) Concrete 31 is poured, cured, and the structural exterior wall W is constructed.

Incidentally, prior to pouring the concrete 31, it is also possible to connect the safety fence 32 to the connecting fittings 8, 8 as shown in the imaginary line in FIG. 1 to make the work safer.

[Brief explanation of the drawing]

The drawings show an embodiment of the semi-finished product for precast reinforced concrete exterior walls according to the present invention, and FIG. 1 is a perspective view, FIG. 2 is a partially cutaway longitudinal sectional view, FIG. 3 is a partially longitudinal sectional view, and FIG. 5 is a perspective view of the reinforcing bars, and FIGS. 6A to 6H are explanatory drawings of construction procedures. 1...Finish, 2...Reinforcement, 2a...
...Protruding reinforcing bar part, 3...Opening, 4...
... Satsushi frame, 5 ... Surrounding part, 6 ...
... lower part, 7 ... thin flat part, 8.1
1, 12... Connecting fittings, 9... Connecting fittings, 13... Grooves, 20... Supporting tools for construction, 21... ...Separator, 22...
Joint material, 24... Wall reinforcement, 26... Formwork, 31... Concrete Wll... Structural exterior wall.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ A thin flat part 7 formed to have a wall thickness thinner than the structural outer wall W of the building, and finishing 1 is applied to the outer surface of the thin flat part 7. On the inner surface side, reinforcing bars 2 are partially protruded toward the inside of the building, and 1. This is a semi-finished product for a precast reinforced concrete outer wall in which a structural outer wall W with an opening 3 is constructed by arranging wall reinforcements 24 that are integrally connected with the protruding reinforcing bar portion 2a and then integrally joined with concrete 31 to be poured. Then, the sash frame 4 is buried and fixed in advance in the inner peripheral part of the opening 3, and the sash frame 4 is made so that the embedded peripheral part 5 and the lower part 6 of the sash frame 4 are thicker than the thin flat part 7. A precast reinforced concrete semi-finished product for an external wall, characterized in that it has the same or almost the same thickness as the external wall W. ■ The precast reinforced concrete according to the utility model registration claim item (2), in which the connection metals [11, 11] to the erection supports 20, 20 are embedded and fixed near the upper end of the inner surface of the peripheral portion 5. Semi-finished products for exterior walls. ■ On the inner surface of the thin flat part 7 excluding the peripheral part 5 and the lower part 6, there is a formwork 26 for pouring the concrete 31.
The precast reinforced concrete semi-finished product for an external wall according to claim 1 or 2, wherein the connecting fittings 12 for the traction separators 21 are buried and fixed in an inwardly protruding state. ■A groove 13 into which a joint material 22 is inserted and fitted is formed in the peripheral portion of the thin flat portion 7, excluding the peripheral portion 5 and the lower portion 6.Claims ① to ③ of the Utility Model Registration Claims. A semi-finished product for precast reinforced concrete exterior walls as described in any of the above.