KR20050048298A - Method for pre-constructing staircase in building and pc member therefor - Google Patents

Abstract

The present invention relates to a line member method of the staircase room of a building and a PC member used in the construction method,

An installation step of the left staircase PC wall member 1, and an installation step of the right staircase PC wall member 3; The installation step of the rear wall PC wall member (4), the joining step of each side connection portion of the left and right stairs room PC wall member (1) (3) and the rear stair room PC wall member (4), the intermediate landing A joining step of the PCB member 5, a joining step of the first step PC member 7, and a joining step of the second floor stairway half slab PC member 8; Joining the second staircase PC member 9; Placing concrete in the field on an upper surface of the concrete pouring portion; The construction of the staircase of one floor is completed by the steps of installing a conventional window frame 11 in which the glass plate is fixed; Prior to the construction of the reference layer (B) by the construction process as described above, the construction process to ensure that at least the second floor staircase is built to continue to be repeatedly performed to the top floor.

The present invention can be constructed in a short time by reducing the construction cost and stairs construction work, and can be used as a transport passage of materials required for construction, as well as can be used as a worker's passage, Likewise, there is no need for installation for the passage of the worker.

Description

METHOD FOR PRE-CONSTRUCTING STAIRCASE IN BUILDING AND PC MEMBER THEREFOR}

The present invention relates to the pre-construction method of the staircase room of the building and the precast concrete member used in the construction method, and in particular, to improve the construction and quality by allowing the construction of the staircase room before the reference floor simply using only the PC member. Of course, it relates to the pre-construction method of the staircase room of the structure configured to enable the construction of high-rise buildings by greatly improving the structural stability and the PC member used in the construction method.

In modern times, despite the increase in population, residential houses and office buildings are limited, so in urban areas, the overcrowded areas of the population, residential and office buildings are built on high floors, eliminating shortages of residential and office space due to overcrowding. This is a well known fact.

In the early 1990s, the construction of apartments using PC members was active, but it is gradually decreasing as high-rise apartments with 15 or more floors become more common.

This is because the existing PC method has limitations on the high-rise of apartments due to legal and technical constraints, and the quality needs of customers due to defects in design and construction despite the excellent quality since the PC members are produced at the factory. Because it did not satisfy.

Therefore, many high-rise buildings with more than 16 floors being constructed these days do not use PC members, and use only cast-in-place concrete (RC method).

In other words, in the state of the foundation construction at the construction site, the floor and walls, etc., all the concrete has been poured in the construction site.

However, according to the construction method of a high-rise building using only the conventional cast-in-place concrete as described above, it is necessary to install the formwork in order to pour all the concrete in the field, and the concrete must be completely solid so that the concrete for the wall can be poured on it. Not only has the disadvantage of lengthening the construction period, but also construction wastes that were used during site casting were generated, which caused the environment to be polluted.

In addition, in the trend of aging construction workers, productivity has been a direct factor in building high-rise buildings with only cast-in-place concrete.

In addition, there was a problem such as noise and dust generated at work and polluting the surrounding air at the construction site with the inefficient workability to install and dismantle all the formwork for site casting.

In particular, in order to construct a staircase by pouring concrete in the field, it is necessary to manufacture a formwork for constructing all the staircases, which requires a lot of work time and workers, and despite the need for a lot of time and workers, There have been problems such as a case where the construction is not carried out correctly and uniformly.

The present invention has been made in order to solve the problems of the conventional construction method of the staircase room, the object of the present invention is to construct the stairs room prior to the construction of the stairs prior to the reference layer without installing the formwork for building all the stairs To improve the quality and quality, as well as to shorten the construction period and to significantly reduce the manpower to provide a pre-installation method of the staircase of the building and the PC member used in the construction method.

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

The pre-construction method of the staircase room of the building of the present invention is to assemble the staircase (A) before the construction structure (hereinafter referred to as the reference floor) to be built around the staircase room (A), and then the staircase (A) as a support A method of constructing a building by sequentially constructing the reference floor B from the lowest floor (including the basement floor) to the top floor.

That is, prior to constructing the building structure by placing concrete in the reference layer (B), and prior to building the staircase chamber (A) of at least two stories high by a crane or the like above the building structure to be constructed, Next, each construction step of the present invention will be described.

As shown in Figs. 1 to 19, the line construction method of the staircase of the present invention includes the PC wall member 1 for the staircase room on the left side of the stairs layer for the left side of the stairs (hereinafter referred to as the lower layer) on the left side. An installation step of the left side PC wall member (1) to be bonded to and installed);

The right staircase PC wall member 3 is formed by joining the right staircase PC wall member 3 opposite the left staircase PC wall member 1 to the lower step stairs PC wall member 2 '. (3) the installation step;

Rear staircase PC for joining the rear staircase PC wall member 4, which is the rear side from the left and right staircase PC wall members 1, 3, to the rear staircase PC wall member 2 " Installing the wall member (4);

Each staircase PC wall member (1) (3) (4) which joins both ends of the rear staircase PC wall member (4) to each rear end of the left and right stairs room PC wall members (1) (3) Bonding step of the vertical junction of the side connection of the;

Calmor tar on the upper surface of the supporting projections 1a and 3a formed so as to protrude so as to support the lower portion of the front portion of each of the inner side surfaces of the left and right stairs room PC wall members 1 and 3 below. 38) The intermediate landing PC member for joining the intermediate landing PC member 5 to the left and right stairs room PC wall members 1 and 3 while the intermediate landing PC member 5 is placed thereon ( Conjugation step 5);

The half-slab PC member for first floor stepping, which is already installed at the rear end of the intermediate landing PC member 5 and the upper end of the rear side of the lower left and right stairs room PC wall members 2 and 2 '. A joining step of the first stepping PC member (7) for joining the upper and lower ends of the first stepping PC member (7) to the right side of the front end of (6);

Supporting projections 1a formed by protruding to support one side of an upper surface of the rear staircase PC wall member 4 and an upper end of the rear side of the left and right stairs PC wall members 1 and 3 ( The second slab half slab PC member 8 is placed on the upper floor mortar 38 of the upper floor mortar 38, and the second slab half slab PC member 8 is placed on the left and right stairs room PC wall members. (1) (3) and the step of joining the second floor staircase half slab PC member 8 bonded to and installed in the rear staircase PC wall member 4;

While maintaining a predetermined distance 19 from the first step PC member 7, the rear end portion of the intermediate step participation PC member 5 and the second floor step entry half slab PC member 8 on its left side. A joining step of the second staircase PC member 9 for joining and installing the upper and lower ends of the second staircase PC member 9 at the distal end portion;

Placing concrete in the field on an upper surface of the concrete placing portion 8a, which is a rear side of the second slab stepping half slab PC member 8;

Construction of the staircase A of one floor is completed by the steps of installing a common window frame 11 in which a glass plate is fixed between the tip portions of the left and right stairs wall members 1 and 3. ;

By the above construction process, the construction process of continuously constructing the staircase chamber A on the upper floor and constructing the at least two staircase chamber A in advance of the construction of the reference layer B is continuously repeated up to the top floor. By performing the construction of the staircase (A) of the entire floor of the building is completed, each time the construction of the staircase (A) of the two floors is completed, the reference floor (B) is constructed (RC method).

As shown in Fig. 19, each of the left and right and rear side PC wall members 1 in the step of installing the left and right and rear PC wall members 1, 3 and 4 respectively. (3) (4) and the joint between the lower floor PC wall members 2, 2 'and 2 " A plurality of sleeves 1b, 3b, 4a are embedded therein (at this time, mortar inlets 1ba, 3ba, 4aa and air outlets below the sleeves 1b, 3b, 4a, respectively). 1bb) (3bb) 4ab are installed so as to communicate with the outside) of the PC wall members 1, 3, and 4 for the staircases inside the upper portions of the sleeves 1b, 3b, and 4a. Insert the lower ends of the reinforcing bars (1c, 3c, 4b (hereinafter referred to as vertical reinforcing bar)) embedded in the vertical direction therein, the left and right of the lower layer corresponding to each of the sleeve (1b) (3b) (4a) And a plurality of verticals embedded in the PC wall members 2, 2 ', 2 "for the staircases at the rear side. The portion exposed to the outside of the upper side of the roots 2a, 2'a, and 2 "a (hereinafter, referred to as upper exposed reinforcing bars 2aa, 2'aa, and 2" aa) is said sleeve. (1b) (3) and (4a) each step room PC wall member (1) (3) (4) and each step room PC wall member (2) on the left, right and rear sides of the lower floor while being inserted into the lower part of the lower part. The lower mortar injection ports 1ba, 3ba, 4aa of the sleeves 1b, 3b, and 4a are formed in a state in which the joining space 20 is formed between (2 ') and 2 ". The mortar is injected into the mortar by the mortar to the inner space of the sleeves 1b, 3b and 4a, as well as to the left, right and rear sides of the PC wall members 1, 3 and 4 for the staircase. The PC wall members (1) (3) (4) for each staircase and each step of the lower floor are filled with the space for joining (20) formed between the PC wall members (2) (2 ') and "2" for the staircase rooms. The utility PC wall members 2, 2 ', 2 "are firmly bonded to each other.

As shown in Fig. 17, the mutual joining of the vertical joint, which is a side connection between the left staircase PC wall member 1 and the rear staircase PC wall member 4 adjacent to each other, is a projection in the vertical direction to the left of the rear end. The front end of the left end of the staircase PC wall member 4 on the rear side in which the projection 4d is formed in the vertical direction on the right side of the rear end of the left staircase PC wall member 1 on which (1j) is formed and the front side of the left end of the left end chamber. After inserting the backup member 40a in a predetermined position which enters from the outer side to the inner side of the joining space formed between the side portions, the leakage blocking portion composed of the caulking portion 40a 'into which the leakage blocking material is injected is formed. Then, a predetermined heat insulating and leak-inducing space portion 40c is formed inside the backup member 40a.

Next, after filling the leakage blocking unit 40b, which is a curved space part inside the space for insulated and leak-inducing space 40c, a urea foam as a filler, the leakage blocking unit 40b in which the filler is filled. ) Annular portions of the loop bars 1h formed in the plurality of shear deformation preventing recesses 1i formed at regular intervals in the longitudinal direction of the left staircase PC wall member 1 in the space portion formed inwardly from And the annular portions of the loop bars 4c formed in the plurality of shear deformation preventing recesses 4f of the rear staircase PC wall member 4 corresponding to each other so as to overlap each other, and then overlap each other. (1h) Inserting the vertical joint reinforcing bar 41 in the vertical direction to the inside of the annular portion of (4c), and then filling the mortar with the space part, the adjacent left staircase wall member (1) and after The process steps for connecting to each other the bonding practical PC wall members (4) is completed.

As shown in Fig. 16, the mutual joining of the vertical joints, which are side connections between the right side staircase PC wall member 3 and the rear staircase PC wall member 4 adjacent to each other, is located on the front side of the left side of the rear end. The right end of the staircase PC wall member 4 on the rear side of which the projection 4e is formed in the vertical direction on the left side of the rear end and the right end of the rear end of the right staircase PC wall member 3 having the projections 3g formed in the vertical direction. After inserting the backup member 42a in the predetermined position which enters inward from the outer side of the joining space part formed in between, after forming the leakage blocking part which consists of the caulking part 42a 'into which the leakage blocking material was injected, In addition, a predetermined space portion 42c for insulating and leaking water is formed inside the backup member 42a.

After filling the urea foam, which is a filler, to the leakage blocking portion 42b, which is a curved space portion inside the space for insulated and leak-inducing space 42c, the leakage blocking portion 42b in which the filler is filled is filled. An annular portion of each of the loop bars 3h formed in the plurality of shear deformation preventing recesses 3i formed at regular intervals in the longitudinal direction of the right staircase PC wall member 3 in the space portion formed inwardly from Corresponding to each other by overlapping the annular portions of the loop bars 4c formed in the plurality of shear deformation preventing recesses 4f of the rear staircase PC wall member 4 corresponding to each other, and then overlapping the loop bars ( 3h) Inserting the vertical joint reinforcing bar 43 in the vertical direction to the inside of the annular portion of (4c), and then filling the mortar with the space part, the PC wall member 3 for the adjacent right staircase and the rear step The process of connecting to a PC for the wall member (4) joined to each other is completed.

As shown in Fig. 15, the joining process of the vertical joint between the left side of the tip of the left staircase PC wall member 1 and the right end of the adjacent PC wall member 10 on the left side is also adjacent to each other. It is the same as the joining process of the vertical joint between the left wall PC member 1 and the rear wall PC wall member 4 or the right wall PC wall member 3 and the rear wall PC wall member 4, However, the projections 1j of the distal end of the left stairwell PC wall member 1 are formed on the rear side of the left side of the distal end part, and the PCs adjacent to the left side of the left stairwell PC wall member 1 are not adjacent to the right side of the distal end. The only difference is that they are joined to the wall member 10.

The glass plate is fixed to the window frame fixing recesses 1f and 3f formed in the vertical direction on the right side of the distal end of the left staircase PC wall member 1 and the left side of the distal end of the right staircase PC wall member 3. By inserting and fixing the ordinary window frame 11 installed thereon, each side connection portion between the left, right and rear stairs PC wall members 1, 3, 4 and the window frame 11 adjacent to each other is vertical. The joining process of the joint is completed.

As shown in Fig. 6, the left end of the intermediate stairwell PC member 5 and the left staircase PC wall member 1 are joined to each other so that the left end of the intermediate stairwell PC member 5 has a left staircase PC. One side surface of each of the plurality of fixing recesses 5d formed on the left side of the intermediate stepping PC member 5 in a state where the upper surface of the supporting protrusion 1a of the wall member 1 is placed on the top of the mortar 38. Including the fixing bar (5ba), except for the remaining portion is buried in the fixing metal piece (5b) and a plurality of fixing recesses (1d) formed on one side of the left side room PC wall member (1) corresponding thereto In the state in which both sides of the connecting metal piece 21, which are bent at right angles to be in contact with each other to one side of the fixing metal piece 1e, each of which is embedded by including the fixing stand 1ea except the side, respectively, are in contact with each other. After welding the metal pieces 5b, 1e and 21 to each other, The plurality of fixing recesses 5d of the intermediate landing PC member 5 and the plurality of fixing recesses 1d of the left staircase PC wall member 1 are firmly bonded to each other by filling mortar.

As shown in FIG. 6, a diagram showing the mutual junction between the right end of the intermediate landing PC member 5 and the PC wall member 3 for the right staircase room, and the left end of the intermediate landing PC member 5 and the left staircase Similarly to the mutual joining process of the PC wall member 1, the right end of the PC member 5 for the intermediate stairway part is placed on the top of the mortar 38 on the upper surface of the support protrusion 3a of the PC wall member 3 for the right staircase thread. Fixing metal piece 5b in which the remaining portions are embedded and fixed in a plurality of fixing recesses 5d formed on the right side of the intermediate landing PC member 5 in a placed state, including a fixing bar 5ba except for one side. And a fixing metal piece 3e in which the remaining portions are embedded and fixed in a plurality of fixing recesses 3d formed on one side of the right side stairwell PC wall member 3 corresponding thereto, except for one side. Perpendicular to each other on one side of After welding the metal pieces 3e, 5b, 21 to each other in a state where both sides of the curved connecting metal piece 21 are in contact with each other, a plurality of fixing recesses of the intermediate member PC member 5 5d) and the plurality of fixing recesses 3d of the staircase PC wall member 3 on the right side are firmly joined to each other by filling mortar.

As shown in FIG. 5, the joining of the first step PC member 7 and the first floor stepping half slab PC member 6 is performed by the distal end of the first floor stepping half slab PC member 6. In order to insert the backup member 22a in the predetermined position of the lower part of the joining space part formed by bend | omitted at right angles between the rear end part of the lower part of the 1st step PC member 7, and to block the water leakage on the outer side. A vertical leakage blocking portion 22 formed of a caulking portion 22b into which a caulking material is injected, and a space portion 23 in a predetermined vertical direction is formed in an inner portion thereof from the backup member 22a; Intercalate the mortar 24 in the horizontal space formed next to the space 23, and form the space 25 in the vertical direction upward from one end of the portion where the mortar 24 is interposed. And a plurality of upper portions of the space part 25. The connecting metal piece 26 includes a fixing base 7aa excluding one side of each of the plurality of fixing recesses 7ba formed at regular intervals above the rear end of the lower part of the first step PC member 7. One side surface of each of the fixing metal pieces 7a on which the remaining portions are buried and fixed, respectively, and a plurality of fixing recesses 6ba formed on an upper end of the corresponding half-slab PC member 6 for the first floor landing. The remaining parts, including the holder 6ca except for the above, are placed on each fixing metal piece 6c which is embedded and fixed, and then welded to each other, and the mortar is filled in each fixing recess 7ba or 6ba thereon. The first step PC member 7 and the first half step slab PC member 6 for joining the first step are firmly joined to each other.

As shown in FIG. 7, the joining of the first step PC member 7 and the intermediate step PC member 5 is performed by the rear end of the intermediate step PC member 5 and the first step PC member. A caulking portion into which a caulking material is injected to insert a backup member 27a at a predetermined position on the lower side of the joining space portion formed by bending at a right angle between the tip portion of the upper portion of the upper portion (7), and to prevent leakage. A water leakage blocking portion 27 formed in a vertical direction formed of 27b), and a space portion 28 in a predetermined vertical direction is formed on the inner side thereof from the backup member 27a, and then horizontally formed after the space portion 28. Interposed between the mortar 29 in the direction of the space, forming a vertical space 30 in the vertical direction from one end of the side of the mortar 29, a plurality of angles on the upper side of the space 30 A connecting metal piece 31 is formed on the first step PC member 7. Each of the fixing metal pieces 7a in which the remaining portions are embedded and fixed to each of the plurality of fixing recesses 7ca formed at regular intervals on the upper end of the side, except for one side, are embedded and fixed thereto. On each of the metal pieces 5b in which the remaining portions are embedded, respectively, in each of the fixing recesses 5a formed on the rear end of the corresponding intermediate landing PC member 5, including the fixing bar 5ba except for one side. The first stepped PC member 7 and the intermediate stepped PC member 5 are firmly joined to each other by placing mortar on each of the fixing recesses 7ca and 5a thereon. Are bonded.

As shown in FIG. 8, the joining of the second step PC member 9 and the intermediate step PC member 5 is performed by the rear end of the intermediate step PC member 5 and the second step PC member ( A caulking portion into which a backing member 27a is inserted at a predetermined position on the lower side of the joining space portion formed by bending at right angles between the distal end portion of the lower portion of 9), and a caulking material is injected to block leakage. 27b), a vertical water leakage blocking portion 27 is formed, and a predetermined vertical space portion 28 is formed in the inner side from the backup member 27a, and from the upper end of the space portion 28, Interposed between the mortar 29 in the horizontal space, forming a vertical space 30 in the vertical direction from one end of the mortar 29, a plurality of the upper side of the space 30 Each connecting metal piece 31 has a lower portion of the second staircase PC member 9. Each of the fixing metal pieces 9a in which a plurality of fixing recesses 9ca formed at regular intervals on the upper end of the side, including fixing bars 9aa except one side, are embedded and fixed, respectively. On each of the metal pieces 5b in which the remaining portions are embedded, respectively, in the plurality of fixing recesses 5a formed on the rear end of the corresponding intermediate landing PC member 5, including the fixing bar 5ba except for one side. After mounting, the intermediate member PC member 5 and the second step PC member 9 are firmly joined to each other by welding each other and filling mortar with the fixing recesses 9ca and 5d thereon. do.

As shown in FIG. 9, the joining of the second stepped PC member 9 and the second floor stepped half slab PC member 8 is performed at the distal end portion of the second floor stepped half slab PC member 8. Inserting the backup member 33a at a predetermined position on the lower side of the joining space formed by bending at right angles between the second stepped PC member 9 and the rear end of the second step PC member 9, and blocking the leakage on the outside thereof. In order to form a leakage blocking portion 33 in the vertical direction consisting of the caulking portion (33b) in which the caulking material is injected, a predetermined vertical space portion 34 is formed in the inner portion from the backup member (33a), Interposed between the mortar 35 in the horizontal direction from the upper end of the space portion 34, and forms a space 36 in the vertical direction from the one end of the mortar 35 in the vertical direction, the space On each side of the part 36, a plurality of connecting metal pieces 3 7) a plurality of fixing recesses 9ba formed at regular intervals above the rear end of the upper part of the second staircase PC member 9, including the fixing base 9aa except for one side, and the remaining portions are respectively Fixing plate except one side to a plurality of fixing recesses 8ba formed on the upper end portion of each of the fixing metal pieces 9a buried and fixed and the corresponding second floor stairway half slab PC member 8 ( 8ca), the remaining parts are embedded in each of the fixing metal pieces 8c which are embedded and fixed, and then welded to each other, and the mortar is filled in the fixing recesses 9ba and 8ba thereon. The half-slab PC member 8 for second floor landing and the 2nd stairs PC member 9 are firmly joined to each other.

As shown in Figs. 3 and 4, the half slab PC member 8 for the second floor stepping and the PC wall members 1 and 3 for the left and right staircases are mutually joined, and the second floor stepping harp. The mutual joining of the slab PC member 8 and the rear staircase PC wall member 4 is performed on one side of the upper surface of the rear staircase PC wall member 4 and of the left and right stairs PC wall members 1 and 3. After placing the bottom end of the left end and the rear end of the second slab engagement half slab PC member 8 on the inclined mortar 38 laid on the upper surface of each supporting protrusion 1a, 3a, respectively, The left end of the second floor stairwell half slab PC member 8 and the left staircase PC wall member 1, the second floor stairway half slab PC member 8 and the right end of the second floor stairwell PC wall member (3) Joining and placing concrete in the field on the upper surface of the concrete pouring portion 8a Just do it.

That is, the bonding method of the left end of the second floor stairway half slab PC member 8 and the left staircase PC wall member 1 or the right end of the second floor stairway half slab PC member 8 and the right step The joining method of the practical PC wall member 3 includes the left end of the intermediate landing PC member 5, the right end of the PC wall member 1 for the left staircase, and the PC for the intermediate stairway 5 and the right staircase PC. In the same process as the bonding process of the wall member 3,

A plurality of fixing parts formed at the left side of the second floor stairwell half slab PC member 8 are joined to each other by the left end of the second floor stairwell half slab PC member 8 and the left stairwell PC wall member 1. A plurality of fixing parts formed on one side of the fixing metal piece 8c and the corresponding left side stairs PC wall member 1 including the fixing stand 8ca except the one side in the recessed part 8bb. Both sides of the connecting metal piece 39, which are bent at right angles to contact the one side of the fixing metal piece 1e, which includes the fixing base 1ea except for one side in the recessed part 1d, is embedded. After welding the metal pieces 8c, 1e and 39 in contact with each other, a plurality of fixing recesses 8bb and a left stairwell PC wall of the second floor stairway half slab PC member 8 are welded to each other. A plurality of fixing recesses 1d of the member 1 To be firmly connected by charging as a mortar.

Interconnection of the right end of the second floor stepping half slab PC member 8 and the right staircase PC wall member 3 is a plurality of fixings formed on the right side of the second floor stairway half slab PC member 8. A plurality of fixings formed on one side of the fixing metal piece 8c and the right side staircase PC wall member 3 corresponding to the fixing portion 8bb, including the fixing stand 8ca except one side, are embedded and fixed. Both side surfaces of the connecting metal piece 39, which are bent at right angles to contact one side of the fixing metal piece 3e, which includes the fixing base 3ea except for one side in the recessed part 3d, and is embedded. After welding the metal pieces 8c, 3e and 39 in contact with each other, the plurality of fixing recesses 8bb and the right staircase PC of the second floor stairway half slab PC member 8 are welded to each other. A plurality of fixing recesses of the wall member 3 It is firmly bonded by filling mortar in (3d).

The fixing metal pieces 1e, 3e and 8c are welded and fixed to the back surfaces of the rectangular metal plate by being welded and fixed to both sides, so that the fixing bars 1ea and 8ca and the metal pieces are fixed. A portion of (1e) (8c) is embedded in the left staircase PC wall member (1) and the half slab PC member (8) for the second floor stepping, so that each metal piece (1e) (8c) is firmly fixed. It is.

As shown in Figure 3, the step of placing concrete in the field on the upper surface of the concrete placing portion (8a) of the half-slab PC member 8 for the second floor stair step (4) The second floor stairway half slab, wherein the left, right and rear ends are joined to the top surface of the upper wall of the left and right, respectively, on the mortar of the supporting projections 1a and 3a of the PC wall members 1 and 3a for the staircase. As the lower side is embedded in the concrete pouring portion 8a of one side of the PC member 8, the upper side protrudes upward and is exposed to the truss girder 8aa, which is installed in the horizontal direction while being connected to the truss girder 8aa. After the reinforcing bars 8ab and vertical bars 4b and the plurality of bars of the rear wall PC wall member 4 are built in the longitudinal and transverse directions, the second floor stairs can be used without installing the formwork separately in the field. Half Slab PC Member Placing concrete on the concrete pouring portion 8a at the site so that a reinforcing casting layer is formed on one side of the 8, the half slab PC member 8 for the second floor stairway is the PC wall member 4 for the rear staircase. It is firmly bonded to the left and right PC wall members 1 and 3 for the staircase.

The height of the left and right stairs room PC wall members 1 and 3 is formed to be approximately lower than the height of the rear stairs room PC wall member 4 by about the height of the second floor stepping half slab PC member 8.

Each of the fixing metal pieces 1e, 3e, 5b, 6c, 7a, and 9a is fixed to the sides of the rectangular metal plate, respectively, to the sides 1ea, 3ea, 5ba, and 6ca. 7aa) and 8ca and 9aa are welded respectively.

Next, each PC member for staircase rooms used in the line construction method of the staircase rooms of the building of this invention is demonstrated.

As shown in Figs. 10 and 11, the second slab landing half slab PC member {8 (the first floor landing slab PC member 6 is the second floor landing slab PC member 8). Since the same structure and a description thereof will be omitted)} is a fixing projection (8d) formed on the lower side of the front end; A concrete pouring portion 8a which is a portion in which a recess is formed on the rear side and the concrete portion is formed; It is formed between the fixing projection (8d) and the concrete pouring portion (8a) and is composed of a bonding portion (8b) formed on the one side and both sides of the fixing recesses (8ba) (8bb) are formed at regular intervals, respectively. And; Reinforcing bars 8ab are installed on the upper surface of the concrete pouring part 8a to connect the truss girder 8aa and the respective truss girder 8aa.

10 and 11, the second step PC member {9 (the first step PC member 7 is the same structure as the second step BC member 9, so the description thereof will be omitted. And a locking projection 9b formed by protruding the upper half of the upper end so as to be mounted on and supported by the calmor tar on the upper surface of the fixing protrusion 8d of the second floor stepping half slab PC member 8 at the upper end. ; A plurality of fixing recesses 9ba which are formed at regular intervals on an upper side of the locking protrusion 9b; A locking projection 9c formed by protruding from the upper half of the lower end portion so as to be mounted on and supported by the mortar portion laid on the upper surface of the fixing projection 5c of the intermediate landing PC member 5; It is composed of a plurality of fixing recesses (9ca) formed at regular intervals on the upper side of the locking projection (9c); In the upper and lower fixing recesses 9ba and 9ca, the remaining metal parts 9a are embedded, including the fixing base 9aa except for one side.

As shown in Figures 10 and 11, the intermediate stepping PC member 5 is a fixing projection (5c) is formed to protrude to the lower side of one side; A plurality of fixing recesses 5a formed at regular intervals from one side of the fixing protrusion 5c to one end of the upper portion; A plurality of fixing recesses 5d formed on both sides; In the plurality of fixing recesses 5a and 5d, the remaining metal parts 5b are embedded, including the fixing table 5ba except for one side.

12 and 15, the PC wall member 1 for the staircase room on the left side has an upper end and a lower end of the air outlet 1bb and the mortar inlet 1ba formed on the side of the body a. A plurality of sleeves 1b each embedded at predetermined intervals so as to be visible to the plurality of sleeves;

A vertical reinforcing bar 1c having a lower end part inserted into an upper part of each of the sleeves 1b and having an exposed reinforcing part 1ca having an upper end part exposed to the outside while being embedded in a vertical direction;

The projection 1g is formed at one side of the rear end of the body a, and each shear deformation preventing recess 1i formed at regular intervals in the vertical direction at the other end of the annular portions of the plurality of roof bars 1h is formed at the other side. One side connection portion (a ') formed;

A projection 1j is formed in a vertical direction on one side of the other side of the body a, which is the opposite side of the one side connection part a ', and an annular portion of one end of the loop bar 1h is formed on the projection 1j. Is composed of the other side connection portion (a ") is formed with each shear deformation preventing recess (1i) formed at regular intervals in the vertical direction,

A plurality of fixing recesses 1d are formed at an upper side of an inner surface, which is a portion adjacent to one side side connecting portion a ', which is a rear end of the body a, and a supporting protrusion 1a is formed at a lower side thereof. A window frame fixing recess 1f is formed in a vertical direction on an opposite side of the other side connection portion a ", which is one side of the tip end of the body a; from the window frame fixing recess 1f; While the plurality of fixing recesses 1d are formed in the middle portion of the inner side, the supporting protrusions 1a are formed on the lower side thereof.

13 and 16, the PC wall member 3 for the staircase room on the right side has the upper and lower air outlets 3bb and the end portions of the mortar inlet 3ba formed on the side portions of the stairs wall visible on the outside of the body b. A plurality of sleeves 3b which are embedded at predetermined intervals so as to be respectively;

A vertical reinforcing bar 3c having a lower end inserted into an upper part of each of the sleeves 3b and having an exposed reinforcing part 3ca having an upper end exposed outward while being embedded in a vertical direction;

Protrusions 3g are formed in the vertical direction on the inner side of the rear end of the body b, and annular portions of one end of the loop bar 3h are formed on the protrusions 3g at regular intervals in the vertical direction, respectively. In the one side connection portion (b ') formed with a plurality of shear deformation preventing recesses (3i),

While a plurality of fixing recesses 3d are formed at an upper side of an inner surface which is a portion adjacent to one side side connecting portion b ', which is a rear end of the body b, a supporting protrusion 3a is formed at the lower side thereof. There is,

A recess portion 3f for fixing the window frame in the vertical direction is formed inside one side of the tip portion of the body b;

A plurality of fixing recesses 3d are formed in the middle portion of the inner side of the glass window frame fixing recess 3f, and a supporting protrusion 3a is formed on the lower side thereof.

As shown in Figs. 14, 16 and 17, the PC wall member 4 for the rear staircase rooms has the upper and lower air outlets 4ab and the mortar inlet 4aa formed at the sides of the body c. A plurality of sleeves 4a, each embedded at predetermined intervals so as to be visible to the outside;

A vertical reinforcing bar 4b having a lower end part inserted into an upper part of each of the sleeves 4a and having an exposed reinforcing bar part 4ba having an upper end part exposed outwardly while being embedded in a vertical direction;

A projection 4d is formed in the vertical direction inside one side of the left end of the body c, and the annular portions of one end of each of the plurality of roof bars 4c are fixed in the vertical direction in the projection 4d. A side connection portion c 'formed with a plurality of shear deformation preventing recesses 4f formed at intervals, respectively;

A plurality of shear deformation preventing recesses 4f are formed at one side of the right end of the body c, and the annular portions at one end of each roof bar 4c are formed at regular intervals in the vertical direction on the other side. ) Is formed of the other side connection portion (c ") formed.

The heights of the left and right staircase PC wall members 1 and 3 are formed to be approximately lower than the height of the floor stairway half slab PC member than that of the rear staircase PC wall member 4. In the figure, reference numeral 6a denotes a concrete pour portion, 6aa is a truss girder, 6ab is a reinforcing bar, 6b is a joint portion, 6bb is a fixing recess, 32 is a cast-in-place concrete.

The line construction process of the staircase room of the building of the present invention configured as described above will be described.

After constructing the foundation by ordinary cast-in-place concrete (RC method), the PC wall members (1) (3) (4), first, and first for the left, right and rear staircases in which the staircase A has already been manufactured. 2 Stair PCs (7) (9), half slab PC members (6) (8) for the first and second floor stairs, and PC members (5) for the intermediate stairs are mutually bonded to each other. ) Is to build a staircase of at least two floors in advance of the reference floor prior to the construction of the staircase room A before building the reference floor except for the staircase room A,

First, the exposed reinforcing bar portion 2aa in which the upper side of the vertical reinforcing bar 2a embedded at regular intervals in the left staircase PC wall member 2 of the lower floor is exposed to the outside is exposed to the left staircase PC wall member of the reference layer. The lower end of the vertical reinforcing bar 1c is inserted into the lower part of the sleeve 1b inserted into the upper side while being embedded at regular intervals in the interior of the upper part 1, and then the non-shrink high strength mortar is inserted into the lower mortar inlet of the sleeve 1b. And injected through 1ba to the interior space of the sleeve 1b as well as the space 20 for joining between the left staircase PC wall member 1 and the lower left staircase PC wall member 2. The left staircase PC wall member 1 is firmly joined to the left staircase PC wall member 2 in the lower layer.

Next, the PC wall member 3 for the right staircase and the PC wall member for the rear staircase are joined by the same bonding process as that of the left staircase PC wall member 1 and the lower staircase PC wall member 2 below. In the order of 4), the right staircase PC wall member 3 and the rear staircase PC wall member 4 are placed in the lower staircase right stairroom PC wall member 2 'and the rear staircase PC wall member 2 ". To each.

Then, the process of joining the sides of the left and right stairs room PC wall members 1 and 3 and the rear side stairs PC wall member 4 to each other is as follows.

The mutual joining of the vertical joint, which is a side connection between the adjacent left staircase PC wall member 1 and the rear staircase PC wall member 4, is used for the rear end of the left staircase PC wall member 1 and the rear staircase. A caulking portion into which a leakage blocking material is injected into the outer side after inserting the backup member 40a into a predetermined position inward from the outer side of the joining space portion formed between the front side surface portions of the left end portion of the PC wall member 4. After the 40a 'is formed, a predetermined space portion 40c for insulating and leaking water is formed inside the backup member 40a.

Next, after filling the leakage blocking unit 40b, which is a curved space part inside the space for insulated and leak-inducing space 40c, a urea foam as a filler, the leakage blocking unit 40b in which the filler is filled. The annular portion of the loop bar 1h of the left staircase PC wall member 1 and the annular portion of the loop bar 4c of the rear stairs PC wall member 4 in the space formed inward from When the vertical joint reinforcing bars 41 are inserted in the vertical direction inside the annular portions of the loop bars 1h and 4c overlapping each other in the overlapping state, the mortar is filled to the adjacent space. The left wall PC wall member 1 and the rear wall PC wall member 4 are firmly joined to each other.

Then, the mutual joining of the vertical joint, which is a side connection between the adjacent right staircase PC wall member 3 and the rear staircase PC wall member 4, is connected to the left side of the rear end of the right staircase PC wall member 3 and The backing member 42a is inserted into a predetermined position inward from the outside of the joining space portion formed between the right end portions of the PC wall member 4 for the staircase at the rear side, and then the leaking blocking material is injected into the outside thereof. After the portion 42a 'is formed, a predetermined space portion 42c for insulating and leaking water is formed inside the backup member 42a.

Next, after filling the leakage blocking portion 42b, which is a curved space portion inside the space for insulated and leak-inducing space 42c, a urea foam as a filler, the leakage blocking portion 42b in which the filler is filled. The annular portion of the loop bar 3h of the right staircase PC wall member 3 and the annular portion of the roof bar 4c of the rear staircase PC wall member 4 in the space portion formed inward). When the vertical joint reinforcing bars 43 are inserted in the vertical direction inside the annular portions of the loop bars 3h and 4c overlapped with each other in the overlapping state, the mortar is filled to the space part, and the adjacent right side The staircase PC wall member 3 and the rear staircase PC wall member 4 are firmly joined to each other.

Then, a glass plate is formed on each of the window frame fixing recesses 1f and 3f formed in the vertical direction on the right side of the front end of the left staircase PC wall member 1 and the left side of the front end of the right staircase PC wall member 3. By inserting the fixed window frame 11, each side connection between the adjacent left, right and rear PC wall members 1, 3, 4 and the window frame 11 on which the glass plate is fixed is inserted. The splicing process of the lean vertical splice is complete.

Then, the intermediate stairwell PC member 5 is joined to the left and right stairs room PC wall members 1 and 3, and the intermediate stairwell PC member 5 is installed on both sides of the support projections 1a. (3a) and then the metal pieces 5b of each fixing recess 5d formed on both sides of the intermediate stepping PC member 5 and the left and right PC wall members (3a). 1) (3) of each of the fixing recesses (1d) and (3d) of the fixing metal pieces (1e) (3e) is in contact with the metal piece 21 of the needle-shaped connection and welded.

Next, the fixing protrusion 6d on one side of the first slab half slab PC member 6 for the bottom floor of the reference layer B and the fixing protrusion 5c of the intermediate engagement PC member 5 are provided. After placing the upper and lower locking projections 7b and 7c of the first stairs PC member 7 on each of the mortars 24 and 29 so as to be in contact with each other, the half slab PC for the first floor stairs A fixing metal piece 6c fixed to the fixing recess 6ba of the member 6 and a fixing metal piece fixed in the locking projection 7c formed at the lower end of the first staircase PC member 7 ( The metal piece 26 for a connection is put up and welded so that both sides may contact 7a).

Then, the upper surface of the supporting projections 1a and 3a of the left and right staircase PC wall members 1 and 3 and the upper surface of the covered mortar 38 and the PC wall member 4 for the rear staircase After placing the second slab engagement half slab PC member 8 so as to be in contact with one side of the upper surface, the second stairwell PC is placed on the fixing projection 8d of one side of the second slab engagement half slab PC member 8. The locking projection 9b of the upper end of the member 9 is put on the hook, and the locking projection 9b of the upper end of the second staircase PC member 9 and the locking projection 9c of the lower end of the member 9 are engaged. Each of them is placed in contact with the fixing protrusion 5c on one side of the PC member 5, and then fixed in the fixing recess 8ba of the joint 8b of the half-slave PC member 8 for the second floor stepping. It is fixed in the fixing recessed part 9ba formed in the upper end of the metal piece 8c and the 2nd step PC member 9. The metal pieces fixed on the fixing recesses 5a of the intermediate step PC member 5 are placed on the upper surface of the metal piece 9a so as to contact the bottom surfaces of both sides with each other, and welded to each other. (5b) and the metal pieces 31 for connection are placed on the metal pieces 9a fixed in the fixing recesses 9ca formed at the lower ends of the second stepped PC members 9 so as to contact the bottom surfaces of both sides and welded to each other. .

Then, concrete is poured in the field on the upper surface of the concrete placing portion 8a of the second slab PCS 8 for floor entry.

Then, after installing the glass window frame 11, the glass plate is fixed to the front part so as to be fixed between the front end portions of the left and right stairs wall PC (1) (3), and then continue to repeat the above process Therefore, it is sufficient to construct a staircase of at least two stories above the construction of the reference floor B up to the top floor.

As described above, the present invention eliminates the need for installation of formwork, etc. by using the PC members manufactured at the factory for the construction of the staircase A, thereby reducing construction costs and simplifying the construction of the staircase. The construction of the staircase A can be achieved by repeating the construction of the staircase A of the building at least two floors prior to the construction of the reference floor B, and then constructing the reference floor B. Since it can be used as a transport passage of the material required for the safe construction can be used, of course, because it can be used as a worker's passage, there is an effect that does not need to install for the passage of the worker as in the prior art.

1 is a schematic longitudinal cross-sectional view of a part of the staircase constructed in accordance with the line construction method of the staircase of the building of the present invention;

Figure 2 is a schematic plan view of the staircase room constructed using the PC member of the present invention,

3 is an enlarged longitudinal sectional view of part C of FIG. 1;

4 is an enlarged vertical cross-sectional view of a part D, which is an interconnection portion between the floor slab PC member and the left and right staircase practical PVC wall members in FIG. 2;

5 is an enlarged vertical cross-sectional view of part E of FIG. 1;

6 is an enlarged vertical cross-sectional view of portion F of FIG. 2;

7 is an enlarged longitudinal sectional view of the portion G of FIG. 1;

8 is an enlarged longitudinal cross-sectional view of the mutual joint between the lower end of the second staircase PC member and the intermediate landing PC member in FIG.

9 is an enlarged longitudinal cross-sectional view of the mutual joint between the upper end of the second staircase PC member and the half-slab PC member for floor engagement in FIG.

10 is a perspective view of the bonded state of the construction of the part of the stairs except for the side wall in FIG.

FIG. 11 is an exploded perspective view of a state in which some of the staircase PC members joined to each other in FIG. 10 are extracted and separated;

12 is a perspective view of a left PC wall member of the present invention;

Figure 13 is a perspective view of the right PC wall member of the present invention,

14 is a perspective view of the rear PC wall member of the present invention;

15 is an enlarged cross-sectional view of an H portion of FIG. 2;

16 is an enlarged cross-sectional view of part I of FIG. 2;

17 is an enlarged cross-sectional view of part J of FIG. 2;

18 is a perspective view showing the rear surface of a metal piece used for mutual bonding between the PC members for the staircase of the present invention;

Fig. 19 is a longitudinal sectional view showing the main parts of the upper and lower staircase PC wall members of the present invention.

<Description of the symbols for the main parts of the drawings>

DESCRIPTION OF SYMBOLS 1: Left-handed PC wall member 1a: Supporting protrusion part

1b, 3b, 4a: sleeve 3: PC wall member for right staircase

3a: Supporting projection part 4: PC wall member for rear staircase

5: Intermediate stairwell PC member 5a: Fixing recess

6: Half slab PC member for first floor stairwell 7: 7: PC member for first staircase

8: Half slab PC member for second floor stairwell 9: 9: PC member for second staircase

11: glass window

Claims (13)

An installation step of the left staircase PC wall member for joining the left staircase PC wall member to the staircase PC wall member on the left side of the lower floor immediately below the reference layer; An installation step of the right staircase PC wall member for joining and installing the right staircase PC wall member opposite the left staircase PC wall member to the staircase PC wall member on the right side of the lower layer; An installation step of the rear staircase PC wall member for attaching the rear staircase PC wall member that is rearward from the left and right stairs room PC wall members to the lower staircase PC wall member; A step of joining side connection portions between the respective stairs room PC wall members which join both ends of the rear stairs PC wall members to the rear ends of the left and right stairs room PC wall members; The intermediate landing in the state in which the intermediate landing part PC member is placed on the calmor tar of the upper surface of the support protrusion formed by protruding to support the lower side of the front part of each inner side surface of the left and right stairs room PC wall members. Joining the intermediate landing PC member for joining the PC member for the left and right stairs room PC wall members; The rear end portion of the intermediate landing PC member and the front end portion of the first floor stepping half slab PC member already provided at the upper end portion of the rear side of the lower left and right stairs room PC wall members (2) and (2 '). Joining the first step PC member for joining the upper and lower parts of the first step PC member on the right side; Half slab PC member for second floor stepping on the upper side of the mortar of the support protrusion formed to protrude so as to be supported on one side of the upper surface of the rear staircase PC wall member and the upper end of the rear side of the left and right stairs PC wall member. Bonding the second floor stairwell half slab PC member to the left and right staircase PC wall members and the rear staircase PC wall member in a state of placing the second floor stairwell; Upper and lower portions of the second stairs PC member at the rear end of the intermediate stairwell PC member and the distal end of the second floor landing slab PC member on the left side while maintaining a predetermined distance from the first stairs PC member. Bonding step of the second step PC member for bonding and installing; Placing concrete in the field on an upper surface of the concrete placing portion, which is a rear side of the half slab PC member for entering the second floor; Construction of a staircase of one floor is completed by the steps of installing a glass frame with a glass plate fixed between the front end portions of the left and right PCR wall members; The construction of the staircases of the entire floor of the building is completed by repeatedly performing the construction process to ensure that at least two floors of staircase rooms are constructed in advance of the construction of the reference floor by the above-described construction process. Line construction method of stairs room. The method of claim 1, wherein the left and right ends of the intermediate step PC member and the left and right PC room wall members are joined to each other, the left and right ends of each of the support projections of the left and right stairs PC wall member. Each of the fixing metal pieces and the corresponding left staircase PC wall members which are partially embedded in the plurality of fixing recesses formed on the left and right sides of the intermediate stairwell PC member in the state of being placed on the upper mortar of the upper surface. The metal pieces which are in contact with each other in a state where both sides of the connecting metal pieces that are bent at right angles to be in contact with each other, respectively, are partially embedded in a plurality of fixing recesses formed on one side to be in contact with one side surface of each of the fixing metal pieces. After welding with each other, the plurality of fixing recesses of the intermediate landing PC member and the plurality of fixing walls of the left and right stairs room PC wall members A line construction method for staircases in a building, characterized in that the mortar is filled and joined in the recess. 2. The method of claim 1, wherein the mutual joining of the staircase PC member and the floor stairway half slab PC member is bent at a right angle between the distal end of the floor slab half slab PC member and the rear end of the staircase PC member. A backup member is inserted at a lower predetermined position under the joining space portion formed, and a caulking portion is formed on the outer side thereof, and a predetermined vertical space portion is formed on the inner side from the backup member, and the horizontal portion is formed next to the space portion. Intercalating the mortar through a space portion in a direction, and forming a space portion in a vertical direction from one end of the portion where the mortar is interposed therebetween, and a plurality of connecting metal pieces on the upper portion of the space portion of the step PC member. A part is buried and fixed to each of the plurality of fixing recesses formed at regular intervals above the rear end of the lower part. Each part of the fixing metal piece and the corresponding plurality of fixing recesses formed on the upper end of the half slab PC member corresponding to the floor landing part are embedded in each fixing metal piece and welded to each other. A method of preliminary construction of a staircase room in a building, characterized by bonding the staircase PC member and the floor slab half slab PC member to each other by filling mortar with each fixing recess. The method of claim 1, wherein the joining of the first step PC member and the intermediate step PC member is bent at a right angle between the rear end of the intermediate step PC member and the tip of the upper part of the first step PC member. Inserting a backup member in a predetermined position on the lower side of the joining space to be formed and forming a caulking portion on the outside thereof, and forming a predetermined vertical space portion from the backup member on the inner side thereof, followed by the space portion in a horizontal space. A portion of the tip of the upper side of each of the first staircase PC member is formed by interposing a mortar in a portion, and forming a space portion in a vertical direction from an end of one side of the mortar to a vertical direction. Each of the fixing metal pieces and a corresponding middle part which are partially embedded in each of the plurality of fixing recesses formed at regular intervals on the upper side and fixed thereto. A part of each of the fixing recesses formed on the upper end of the rear end portion of the landing member is embedded in each of the fixing metal pieces fixed to each other, and then welded to each other, and the mortar is filled in the fixing recesses thereon. Line construction method of staircase of building characterized by joining. The method of claim 1, wherein the joining of the second staircase PC member and the intermediate landing PC member is bent at a right angle between the rear end of the intermediate landing PC member and the tip of the lower part of the second staircase PC member. Inserts a backup member in a predetermined position on the lower side of the joining space formed to form a vertical leakage blocking portion consisting of a caulking portion for blocking the leakage on the outside, a predetermined vertical space in the inner portion from the backup member Forming a portion, interposing a calmor tar in a horizontal space portion from an upper end of the space portion, forming a space portion in a vertical direction from one end of the calmor tar to an upper side, and forming a plurality of connecting metal pieces on the upper portion of the space portion. Part of each of the plurality of fixing recesses formed at regular intervals above the distal end of the second staircase PC member Each part of each fixing metal piece which is buried and fixed, and a plurality of fixing recesses formed on the rear end of the corresponding intermediate landing PC member, is partially embedded and placed on each fixing metal piece that is fixed, and then welded to each other. The method of preliminary construction of a staircase room of a building, characterized in that the mortar is filled with each other for fixing the above. The method of claim 1, wherein the mutual bonding of the left and right ends of the floor slab half member slab PC member and the left and right stairs room PC wall member comprises a plurality of fixings formed on the left and right sides of the floor stair half slab PC member. A part of the fixing metal piece, which is partially embedded and fixed to the main recess, and a part of each fixing recess formed on each side of each of the left and right stairs room PC wall members corresponding thereto, is partially embedded and connected to one surface of the fixing metal piece that is fixed. After welding the metal pieces to each other while both sides of the metal piece are in contact with each other, the mortar is filled in each fixing recess of the floor slab half slab PC member and each fixing recess of the left and right staircase PC wall members. Line construction method of the staircase room of the building, characterized in that the joining. The fixing piece according to any one of claims 2 to 6, wherein the fixing metal pieces are welded to both sides of the rectangular metal plate, and the remaining parts are included, including the fixing bar except one side. A preliminary construction method for a staircase room of a building, characterized by being embedded in and fixed to each fixing recess. The floor slab half slab PC member includes: the fixing protrusion formed on the lower side of the tip portion; A concrete pouring portion which is formed at a rear side thereof and is a portion in which a recess is formed; A connection part formed between the fixing protrusion and the concrete pouring part, the fixing recesses being formed at regular intervals on one side and both sides of the upper portion, respectively; Fixed metal pieces each of which is partially embedded and fixed in the plurality of fixing recesses, respectively; PC member used in the pre-construction method of the staircase room of the building, characterized in that the reinforcing bar is connected to the truss girder and each truss girder at regular intervals on the upper surface of the concrete pouring portion. The staircase PC member includes: a locking projection formed by projecting an upper half of the upper end portion so as to be mounted on the bottom of the upper or upper portion of the mortar portion of the fixing protrusion of the half-slab PC member for engaging the floor; A plurality of fixing recesses formed at regular intervals on an upper side of the locking protrusion; A catching protrusion formed by protruding from an upper half of an upper end or a lower end so as to be mounted on and supported on a mortar portion laid on an upper surface of a fixing protrusion of the intermediate stepping PC; It consists of a plurality of fixing recesses are formed at regular intervals on the upper side of the locking projection; A PC member for use in the line construction method of a staircase room of a building, wherein fixing metal pieces, each of which is partially embedded in each of the upper and lower fixing recesses, are configured. The intermediate staircase PC member includes a fixing protrusion which protrudes from a lower side of one side; A plurality of fixing recesses formed at regular intervals from one side of the fixing protrusion to one end of the upper portion; A plurality of fixing recesses formed on both sides; A PC member for use in the line construction method of a staircase room of a building, wherein fixing metal pieces, each of which is partially embedded in each of the plurality of fixing recesses, are configured. The left side PC wall member includes a plurality of sleeves each disposed at predetermined intervals such that the upper and lower ends of the air outlet and the mortar inlet formed on the side are visible to the outside of the body; A vertical reinforcing bar having a lower end inserted into an upper portion of each of the sleeves and having an exposed reinforcing part having an upper end exposed outward while being embedded in a vertical direction; A side connection portion formed at one side of the rear end of the body, wherein each side of the shear deformation preventing recess is formed at regular intervals in a vertical direction at one end of each of the loop bars of the plurality of loop bars; Protrusions are formed in the vertical direction on one side of the other side of the body that is opposite to the one side side connection portion, each of the shear deformation preventing recesses formed at regular intervals in the annular portion of one end of the loop bar in the protrusions In the configuration of the other side connection portion is formed, A plurality of fixing recesses are formed on the upper side of the inner surface, which is a portion adjacent to one side side connecting portion, which is a rear end of the body, and a supporting protrusion is formed on the lower side thereof, and the other side connecting portion which is one side of the front end of the body. The window frame fixing recesses are formed on the opposite side in the vertical direction, and the fixing metal pieces each partially embedded in the plurality of fixing recesses formed in the middle part of the window frame fixing recesses are respectively formed. PC member for use in the pre-construction method of the staircase room of the building, characterized in that the supporting projection is formed on the lower side. The right side staircase PC wall member includes a plurality of sleeves which are respectively embedded at predetermined intervals so that the ends of the upper and lower air outlets and the mortar inlet formed on the side are visible to the outside of the body; A vertical reinforcing bar having a lower end inserted into an upper portion of each of the sleeves and having an exposed reinforcing part having an upper end exposed outward while being embedded in a vertical direction; One side side connection portion having a plurality of projection deformation preventing recesses formed in the vertical direction on the inner side of the rear end of the body, and each of the plurality of shear deformation preventing recesses formed at regular intervals in the vertical direction at one end of the loop bar. In consisting of, Supporting projections are formed on the lower side of each of the fixing metal pieces, each of which is partially embedded in the plurality of fixing recesses formed in the upper portion of the inner surface, which is a portion adjacent to the one side side connecting portion, which is the rear end of the body. A recess for fixing the window frame in a vertical direction is formed inside one side of the front end of the body; PC member for use in the pre-installation method of the staircase room of the building, characterized in that a plurality of fixing recesses are formed in the middle portion of the inner side of the window frame fixing recesses, while supporting protrusions are formed on the lower side thereof. According to any one of claims 8 to 12, wherein each of the fixing metal pieces are fixed to the back of the rectangular metal plate material is bent on both sides is welded, including the rest except one side, the remaining portion is covered PC member used in the line construction method of the staircase room of the building, characterized in that it is embedded and fixed to each fixing recess.