KR100550458B1 - Precast concrete stairway structure of edifice and construction method thereof - Google Patents

Abstract

The present invention discloses a precast staircase structure and construction method thereof for building construction. The present invention is a PC-step structure main body manufactured by the PC method and installed between the floor and the intermediate slab built in the stairwell, the concrete layer is formed with a plurality of steps on one side continuously stepped concrete, a plurality of concrete A metal reinforcing plate having insert holes formed in the layer and having a plurality of fixing holes projecting horizontally from the concrete layer in the opposite direction to each other and fixed to the bottom and the intermediate slab, respectively, on the other side of the concrete layer. It consists of a mortar layer formed to an appropriate thickness and a tile attached to the mortar layer, forming a coupling jaw on the bottom and the middle slab, and fixed the connection flanges at both ends with a fixing pin to the coupling jaw first, and then mortar in the space formed between them It is installed in stairwell by filling.

The present invention can securely and securely connect the precast staircase structure body to the floor and intermediate slab, and can stabilize the staircase structure body as well as the tile is integrally provided on the back of the separate finishing after installation No work is required to maximize the air shortening.

Stairs, Precast, Tiles, Gussets

Description

Precast concrete stairway structure of edifice and construction method

1 is a cross-sectional view schematically showing a step structure of the building construction,

2 is a partially enlarged cross-sectional view showing a precast staircase structure of a building construction according to the present invention;

3 is a perspective view showing an extract of the reinforcing plate of FIG.

4a to 4e are cross-sectional views sequentially showing the manufacturing process of the precast staircase structure according to the present invention,

5A and 5B are schematic cross-sectional views schematically illustrating a method of constructing a precast staircase structure according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1: stair 2: floor slab

3: middle slab 5: hanging jaw

6: fixing hole 11: concrete

12: metal reinforcing plate 12a: connection hole

13, 14: fixing flange 13a, 14a: fixing hole

15: Mortal 16: Tile

30: fixed pin 40: mortar

The present invention relates to a staircase structure for precast construction of a construction work and a construction method thereof, and more particularly, to increase the structural strength of a staircase structure manufactured at a factory or a site, and to integrate a tile on the back surface. The present invention relates to a precast staircase structure for building construction and its construction method, which can maximize the air shortening and securely and easily connect and secure the floor and the middle slab of the stairs.

In general, reinforced concrete buildings have to be reinforced by reinforcing reinforcement bars and build formwork on the site, and then the ready-mixed concrete should be filled in the formwork, so the construction period is very long and requires a lot of manpower.

In addition, the quality of the reinforced concrete building depends not only on the user's materials but also on weather conditions and the proficiency of the worker working on the formwork.

In particular, since the structure of the formwork is very complicated in the core inner wall including the stairwell, when the site is placed in the field, the formwork for all the stairs must be manufactured and installed and dismantled very much. This is an important factor that increases air delay.

That is, as shown in Fig. 1, the stairs 1 are constructed so that the floor slabs 2 connected to the interlayer slabs S protrude from one wall surface W of the stairwell R, and face them. After the intermediate slab 3 is constructed to protrude in the middle of the wall surface W, the staircase main bodies 4a and 4b having a plurality of steps in succession between each floor slab 2 and the intermediate slab 3. It is very difficult and time-consuming to install the formwork directly within the narrow stairwell (R).

Therefore, in recent construction sites, large-scale system formwork or steel gang forms are used for the walls, and large unit panels or precast concrete (hereinafter abbreviated as 'PC') slabs are used for walls. By using, it has been actively attempted to secure the uniform and excellent quality while minimizing the conventional formwork work that depends on manpower and to shorten the air.

For example, Korean Patent Publication No. 10-2004-0014679 discloses a PC stairway and a construction method of manufacturing a floor and an intermediate slab and a stair structure body in a stairwell through a PC. Steps corresponding to each other are formed at the front end of the middle slab and both ends of the stair structure body, and the stair structure body is simply placed on the floor and the step of the intermediate slab, and the stair structure body and the wall are fixed by non-shrink mortar. Not only does it include the possibility that safety accidents may occur due to the departure of the stair structure body, and it is difficult to guarantee the stability of the stair structure body.

In addition, because the factory-made staircase structure simply uses concrete, it is necessary to separately perform plastering or tile construction on the back side of the site after assembly, which inevitably has an adverse effect on air shortening.

The present invention was devised to solve the above-mentioned conventional problems, and the precast stair structure and construction method thereof for building construction which can safely and firmly connect and fix the stair structure main body installed by the PC method to the floor and the middle slab. The purpose is to provide.

Another object of the present invention, the staircase structure can be stabilized structurally to contribute to the improvement of safety of the PC-step structure, as well as no additional finishing work after installation precast of the construction work to maximize the air shortening It is to provide a step structure and a construction method thereof.

PC staircase structure of the building according to the present invention in order to achieve the above objects, the PC staircase structure body is installed by the PC method and connected between the floor and the middle slab built in the stairwell,

A concrete layer in which a plurality of steps are continuously stepped on one surface; Gold having insert holes in the concrete layer having a plurality of connection holes, and having a plurality of fixing holes at both ends, each having a connecting flange fixed to the floor and the middle slab, protruding horizontally from the concrete layer in the opposite direction from each other. Breaking steel sheet; Mortar layer formed to the appropriate thickness on the other side of the concrete layer; And a tile attached to the mortar layer.

In addition, the PC staircase construction method according to the present invention is a method of connecting the PC staircase structure body of the building described above to the floor of the stairs and the middle slab,

Forming a plurality of fixing holes at the bottom of the coupling jaw while forming a coupling jaw at the top of the bottom and the front end of the middle slab; Firstly fixing the connecting flanges protruding horizontally from both ends of the PC-based structure body onto the coupling jaws of the bottom and the middle slab, and inserting the fixing pins into the corresponding fixing holes of the two; Characterized by consisting of the step of filling the mortar in the space formed between the both ends of their front end and the PC-step structure body by the coupling jaw of the bottom and the middle slab.

Accordingly, the present invention can securely and securely connect and secure the staircase structure body installed by the PC method to the floor and the middle slab, and can structurally stabilize the staircase structure body, thereby contributing to the safety improvement of the PC stairs structure. Of course, since the tile is integrally provided on the back side, no additional finishing work is required after installation, thereby maximizing the air shortening, thereby exhibiting great effect on the reliability and safety and air shortening of the building constructed by the PC method.

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

2 and 3, the PC-stepped structure 10 of the building construction according to the present invention is a staircase structure body connected between the floor slab 2 and the intermediate slab 3 of the staircase (1 of FIG. 1), It is built between the floor and the middle slab (2) (3) built in the factory or on-site and built in the stairwell (R in Fig. 1).

As shown, the PC-structured structure 10 according to the present invention includes a thick concrete layer 11 having a plurality of steps 11a successively stepped on one side thereof, and a large part of the body in the concrete layer 11. It consists of a metal reinforcing plate (12) to be insert-molded, and a tile (16) attached to the other side of the concrete layer (11).

In the metal reinforcing plate 12, a plurality of connection holes 12a are formed in an appropriate form so that the concrete layers 11 positioned on both sides of the metal reinforcing plate 12 are integrally connected to each other through the connection holes 12 during curing. Allow to connect.

At both ends of the metal reinforcing plate 12, connecting flanges 13 and 14 for connecting with the bottom and intermediate slabs 2 and 3 extend from both ends of the concrete layer 11 so as to face in opposite directions. Is bent. In each of the connecting flanges 13 and 14, a plurality of fixing holes 13a and 14 for fixing to the bottom and the middle slab 2 and 3 are formed at regular intervals, respectively.

The tile 16 is applied to the rear surface of the concrete layer 11 with a suitable thickness mortar 15, and then mortar the tile 16 so that only the surface of the tile 16 is exposed before the mortar 15 is hardened ( It penetrates and cures the surface of 15) and is integrally attached to the concrete layer 11.

On the other hand, the PC staircase structure 10 of the building according to the present invention can be produced by the following method.

First, as shown in FIG. 4A, a plate-shaped formwork 21 having a sawtooth-shaped cross section is installed in the bottom of a tubular mold 20 having a clogged bottom, and then as shown in FIG. 4B. 20) The concrete 11 liquid on the slurry (slurry) is injected onto the formwork 21 therein.

Next, as shown in FIG. 4C, the metal reinforcing plate 12 having a plurality of connecting holes 12a is pushed into the concrete 11 before the concrete 11 is solidified, and the connecting flanges 13 provided at both ends thereof. 14 protrudes out of the mold 20. To this end, both sides of the mold 20 are provided with openings (not shown) through which the connection flanges 13 and 14 can pass, and can be shielded by separate plugs.

Then, the flowable concrete 11 flows into the connection hole 12a of the metal reinforcing plate 12 so that the concrete 11 positioned above and below the metal reinforcing plate 12 is integrally connected to each other and hardened in this state. As a result, the metal reinforcing plate 12 is firmly fixed to the concrete layer 11.

After the concrete 11 has cured, the mortar 15 is applied to the appropriate thickness thereon as shown in FIG. 4D, and then the tile 16 is fixed on the surface of the mortar 15 as shown in FIG. 4E. And cure.

After the mortar 15 is cured, the step structure 10 is completed by separating the step structure 10 from the mold 20.

Next, a method of constructing the PC-level structure 10 according to the present invention having such a structural feature between the bottom of the stairs 1 and the middle slab 2 and 3 will be described with reference to FIGS. 5A and 5B.

First, as illustrated in FIG. 5, coupling jaws 5 are formed at appropriate heights on the bottom surface protruding from the wall surface W of the stairwell R and the upper surface of the distal end of the middle slab 2, 3, respectively. Only one side is shown in the drawing). A plurality of fixing holes 6 are formed at the bottom of each coupling jaw 5 at regular intervals. At this time, the front end face (2a) (3a) of the lower coupling jaw (5) is formed to be inclined appropriately to correspond to the upper and lower end face of the PC-stepped structure (10).

This is because the PC staircase structure 10 of the present invention is stacked and horizontally formed by the mold 20 to be inclined, so that the upper and lower ends of the PC staircase structure 10 are inclined at a predetermined angle. to be.

Next, the connecting flanges 13 and 14 of the metal reinforcing plate 12 protruding horizontally from the upper and lower ends of the concrete layer 11 on the coupling jaw 5 of the bottom and the middle slab (2) (3), both The fixing pin 30 is inserted into the fixing holes 13a and 14a and 6 provided correspondingly. Then, the PC-stepped structure 10 is stably fixed to the bottom and the middle slab 2, 3 so that there is no fear of detachment and the coupling force is also increased.

In this state, as shown in FIG. 5B, the non-shrink mortar 40 is formed in the space formed between the top and bottom ends of the bottom and intermediate slabs 2 and 3 by the coupling jaw 5 and the PC-based structure 10. By filling and curing, the PC-based structure 10 is installed between the bottom and the middle slab (2) (30).

Then, the mortar 40 covers and fixes the connection flanges 13 and 14 in addition to the PC staircase structure 10 being fixed to the bottom and the intermediate slabs 2 and 3 by the fixing pin 30. The structure of the PC stairs can be fixed very firmly and stably to the floor and the middle slab (2) and (3), and the PC stairs can also be fixed by the metal reinforcing plate (12). It will have a stable structure.

In particular, since the tile 16 is integrally attached to the back surface of the stair structure body, no additional plastering or tile work is required after installation, and thus the present invention maximizes the air shortening effect of the building constructed by the PC method. It becomes possible.

Meanwhile, in the above description, only the metal reinforcing plate 12 is inserted into the concrete layer 11 of the present invention. However, the concrete layer 11 may be formed by reinforcing reinforcing bars (not shown). In this case, it is possible to further increase the structural strength of the staircase structure (10).

As described above, according to the PC staircase structure and the construction method of the building construction according to the present invention, it is possible to securely and securely connect the stair structure main body installed by the PC method to the floor and the middle slab, and the stair structure main body It can be structurally stabilized, which can contribute to the improvement of safety of PC stairs.

In addition, since the tile is integrally provided on the back surface of the stair structure body, no additional finishing work is required after installation, thereby minimizing air.

Therefore, the present invention has a very excellent effect that greatly contributes to the reliability and safety of the building to be constructed by the PC method, and air shortening.

Claims (2)

PC staircase structure body which is manufactured by PC method and installed between floor and middle slab built in stairwell, A concrete layer in which a plurality of steps are continuously stepped on one surface; A gold having insert holes in the concrete layer having a plurality of connecting holes, and having a plurality of fixing holes, projecting horizontally from the concrete layer to face in opposite directions from each other and having connection flanges fixed to the bottom and the middle slab, respectively. Breaking steel sheet; A mortar layer formed to an appropriate thickness on the other side of the concrete layer; And PC stair structure of the building construction, characterized in that consisting of; tile attached to the mortar layer. As a method of connecting the PC-tier structure body of the building construction according to claim 1 to the floor of the stairs and the middle slab, Forming a plurality of fixing holes in the bottom of the coupling jaw while forming a coupling jaw on the top surfaces of the bottom and the middle slab; First fixing the connection flanges protruding horizontally from both ends of the PC-based structure body on the coupling jaw of the bottom and the middle slab, and fixing the fixing pins to the corresponding fixing holes of the first and second fixing slabs; Comprising the step of filling the mortar in the space formed between the two ends of these and the PC-step structure body by the coupling jaw of the bottom and the middle slab; curing step of PC construction structure comprising a.

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