KR20210128808A - Construction methods of wide precast concrete composite structure using support plate - Google Patents

Abstract

A construction method of a wide complex structure according to the present invention constructs a wide cross section by using precast concrete and cast-in-situ concrete together. Thereby, the present invention varies a width of the wide cross section without a change in production mold as necessary, reduces a floor height, secures economic feasibility by reducing a support length of a slab, significantly reduces a synthesis and construction cost by increasing a ratio of cast-in-situ concrete to precast concrete, easily installs electric and fire extinguishing facilities, which are conventionally embedded in precast concrete, before concreting on the spot, and facilitates transportation and hoisting. The construction method comprises the following steps of: installing a PC slab on a PC beam; installing a first support plate between the PC slabs; and arranging a steel reinforcement on the PC slab and the first support plate and concreting.

Description

Construction methods of wide precast concrete composite structure using support plate

The present invention relates to a construction method of a wide composite structure, and more specifically, a wide cross-section is made by using precast concrete and cast-in-place concrete together, and accordingly, the width of the wide cross-section can be increased or decreased as necessary without changing the production mold. , the floor height can be reduced, economic feasibility can be secured by reducing the slab support length, the ratio of cast-in-place concrete to precast concrete can be increased to increase the synthesis effect and construction cost saving effect, and electricity that was previously buried in precast concrete can be increased , fire-fighting equipment, etc. can be easily installed before concrete is poured on site, and it is about a construction method that is easy to transport and lift.

In general, as the length of beams and slabs in buildings increases, the amount of deflection increases rapidly and the bearing capacity decreases. And, as the length of the column increases, the buckling load is greatly increased.

In order to solve this problem, a method of reducing the amount of deflection of the slab and increasing the bearing capacity by increasing the width of the beam (that is, making the beam a wide structure) and reducing the length of the slab by the increased width of the beam has been proposed.

However, the proposed method has a problem in that it is difficult to produce a wide structure precast concrete beam (PC beam) and transport and lifting is difficult because the load is large. In addition, the proposed method has problems such as an increase in production cost and construction cost because the amount of precast concrete used increases.

Precast concrete slabs (PC slabs) have a problem in that the maximum width must be less than 2.4 m to transport to the construction site, and PC slabs exceeding 2.4 m are difficult to transport.

In addition, precast concrete columns (PC columns) used in structures with high floor heights or large live loads are difficult to transport and have large assembly and lifting weights, so they may need to be segmented, which may affect air quality.

In order to solve this problem, when the column is divided into two and constructed (that is, when it is vertically segmented), the cross-sectional area of one column is reduced, so that the bearing capacity is reduced due to buckling, etc., and the problem that the connection of the two columns is difficult. have. Accordingly, most of the columns are horizontally segmented (to shorten the length of the column), but there is a problem in that the construction period is delayed because rebar connection and mortar curing are required at the horizontal joint (connection part).

The present invention has been proposed to solve the above problems, and the support plate (thin plate, formwork made of thin steel plate, deck plate) that can be easily installed by manpower without equipment between precast concrete members (PC column, PC beam, PC slab, etc.) (including truss deck), corrugated steel plate, corrugated steel plate, fiber mixed thin cement plate, etc.) and pouring concrete cast-in-place, to provide a method of making a wide composite structure cross section.

Specifically, the present invention makes a wide cross-section by using precast concrete (PC) and cast-in-place concrete together, so that the width of the wide cross-section can be increased or decreased as needed without changing the production mold, and the floor height can be reduced, and the slab Economic feasibility can be secured by reducing the support length, and by increasing the ratio of cast-in-place concrete to precast concrete, the synthesis effect and construction cost reduction effect can be increased. The purpose of the present invention is to provide a construction method of a precast concrete wide composite structure that can be easily installed before pouring, and is easy to transport and lift.

The method of constructing a slab 100 having a composite wide composite structure according to the present invention comprises the steps of (a) installing a PC slab (precast concrete slab, 110) to a PC beam 210 at a predetermined interval at a construction site; (b) installing a first support plate 140 between the PC slabs 110; And, (c) installing on-site reinforcement on the PC slab 110 and the first support plate 140 and pouring on-site concrete; may include.

The PC slab 110, unlike a general double tee slab, does not have a flange (wing part) formed outwardly from the top of the rib or is formed short with PC and then a flange (wing part) by concrete on-site casting in step (c). is formed or extended.

And, the method of constructing the beam 200 having a composite wide composite structure according to the present invention comprises the steps of: (A) installing two unit PC beams 212 to be spaced apart at a predetermined interval; (B) installing a second support plate 240 between the two unit PC beams 212; And, (c) pouring on-site concrete on the second support plate 240; may include. Step (a) or (a), (b) may be performed before step (a). And, the on-site concrete pouring of step (c) may be made together (simultaneously) with the on-site concrete pouring of step (c).

The pillar 300 having a composite wide composite structure according to the present invention includes two unit PC pillars 312 installed vertically so as to be spaced apart at a predetermined interval; and two third support plates 340 installed to connect the two unit PC pillars 312 .

The unit PC beam 212 is installed on the unit PC column 312, the two unit PC columns 312 and the two third support plates 340 form an inner space, and the on-site concrete is poured into the inner space. .

The PC slab 110, the body 120; Ribs 130 formed downward at both ends of the body 120 in the width direction; And, the cross-section 122 formed on both ends of the width direction of the body 120; may include. An end of the first support plate 140 may be installed on the cradle 122 .

A water guide groove 124 may be formed in the protruding jaw 122 . It is preferable that the water guide groove 124 is formed to be elongated in the longitudinal direction of the PC slab 110 and spaced downward from the first support plate 140 by a predetermined interval. Accordingly, water, rust, cement paste, etc. that have flowed down on the first support plate 140 or the PC slab 110 may be moved through the water guide groove 124 .

Such a water guide groove can also be formed in the unit PC beam (212). Preferably, the water guide groove may be continuously formed on the upper surface of the unit PC beam 212 in the longitudinal direction of the unit PC beam 212 . Water, rust, cement paste, etc. that have moved through the water guide groove 124 of the PC slab 110 may be discharged to the ground after moving to the column through the water guide groove of the unit PC beam 212 .

At both ends of the unit PC beam 212 , a first step 214 is formed on the surfaces facing each other of the two unit PC beams 212 , and the second support plate 240 is on the first step 214 . is installed, and thus both ends of the unit PC beam 212 in step (c) are formed to have a thicker thickness of the site concrete than the central part.

In the central portion of the unit PC beam 212, a second step 217 may be formed on the outside of the cross-section, and a third step 218 may be formed on the inside of the cross-section. In addition, the PC slab 110 may be installed on the second step 217 , and the second support plate 240 may be installed on the third step 218 . A through hole 219 is formed at the upper end of the unit PC beam 212 so that the second and third step steps 217 and 218 are connected and communicated, and the reinforcing bar of the PC slab 110 is passed through the through hole 219 . It may be connected to the opposite PC slab 110 .

A groove 322 is formed on a surface facing the opposite unit PC column 312 among the unit PC columns 312, and jaws 324 are formed at both ends of the groove 322, and a third support plate 340. can be supported by jaws 324 .

Between steps (b) and (c) or between steps (b) and (c), electrical equipment and/or firefighting equipment, etc. may be installed in the part where on-site concrete is to be poured.

The construction method of the precast concrete wide composite structure according to the present invention is a support plate (thin plate, form made of thin steel plate, etc.) between precast concrete members (PC column, PC beam, PC slab, etc.), deck plate (including truss deck), corrugation Steel plate, corrugated steel plate, etc.) can be installed and cast-in-place concrete can be poured to create a wide composite structure cross section.

Accordingly, the construction method according to the present invention can increase or decrease the wide cross-sectional width as needed, reduce the floor height, secure economic feasibility by reducing the slab support length, and increase the ratio of cast-in-place concrete to precast concrete. It is possible to increase the synthesis effect and the effect of reducing the construction cost by increasing it, and it is possible to easily install electric cables, water pipes, drain pipes, sewage pipes, ventilation pipes, etc. that were previously buried in precast concrete before pouring concrete at the site, and because the PC member is light. It has the advantage of being easy to transport and lift.

1 is a cross-sectional view showing that on-site concrete is poured after a first support plate (truss deck) is installed between PC slabs according to the present invention.
2a to 2b are cross-sectional views each showing a modified example of a PC slab.
3 is a cross-sectional view showing a PC slab having a water guide groove, and a first support plate (truss deck) installed in the PC slab.
Figure 4a is a plan view showing a PC beam used in the present invention.
Figure 4b is a plan view showing that the second support plate is installed on the PC beam of Figure 4a.
Figure 5 is a plan view showing that the PC beam of Figure 4a is continuously installed and the PC slab and the first and second support plates are installed on the PC beam.
Fig. 6 is a front view of Fig. 5;
Fig. 7A is a cross-sectional view taken along line AA' of Fig. 5;
Fig. 7B is a cross-sectional view taken along line BB' of Fig. 5;
FIG. 7C is a modified example of a cross-sectional view taken along line BB′ of FIG. 5 .
FIG. 7D is another modified example of a cross-sectional view taken along line BB′ of FIG. 5 .
Figure 8a is a plan view showing another PC beam used in the present invention.
Figure 8b is a plan view showing that the second support plate is installed on the PC beam of Figure 8a.
9 is a plan view showing that the PC beam of FIG. 8a is continuously installed and the PC slab and the first and second support plates are installed on the PC beam.
Fig. 10 is a front view of Fig. 9;
Fig. 11A is a cross-sectional view taken along line CC' of Fig. 9;
11B is a cross-sectional view DD′ of FIG. 9 ;
11C is a cross-sectional view EE′ of FIG. 9 ;
11D is a modified example of the cross-sectional view EE' of FIG.
11E is another modified example of the cross-sectional view EE' of FIG.
12a to 12d are plan cross-sectional views showing columns constructed according to the present invention, respectively.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Accordingly, since the embodiments described in the present specification and the configurations shown in the drawings are merely embodiments of the present invention and do not represent all the technical spirit of the present invention, various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and variations.

The present invention installs support plates (first, second, and third support plates) between precast concrete members such as PC slabs, PC beams, PC columns, and the like, and pours cast-in-place concrete to create a wide composite structure cross section. These will be sequentially described below.

Meanwhile, in the present specification, the support plates (first, second, and third support plates) mean a thin plate, a form made of a thin steel plate, a deck plate (including a truss deck), a corrugated steel plate, a corrugated steel plate, a fiber mixed thin cement plate, and the like.

[Slab composed of PC slab, first support plate and cast-in-place concrete]

1 is a cross-sectional view showing a slab constructed according to the present invention, showing that the on-site concrete is poured after the first support plate (truss deck) is installed between PC slabs (precast concrete slab).

As shown in the drawing, the slab 100 includes a PC slab 110 and a first support plate 140 installed between the PC slab 110, and the PC slab 110 and the first support plate 140 on which the concrete is placed. It includes a concrete part 150 that is cast on site.

The PC slab 110 is installed in a unit PC beam (212 in FIGS. 4a to 6) so as to be spaced apart from the neighboring PC slab 110 by a predetermined interval.

Preferably, the PC slab 110 includes a body 120 and ribs 130 . The body 120 is a flat plate elongated along the longitudinal direction (direction perpendicular to the ground in FIG. 1) of the PC slab 110, and cross-sections 122 are formed at both ends of the body 120 in the width direction. And, along the longitudinal direction of the body 120, the shear reinforcement 132 may be installed. The end of the first support plate 140 is installed on the cradle 122 . As the shear reinforcing bar 132, lattice reinforcing bars, etc. may be used, and serves to integrate the on-site concrete and the PC slab 110 poured thereon and resist shear stress.

The PC slab 110, unlike a general double tee slab, does not have a flange (wing portion) formed outwardly from the top of the rib 130 or is formed short of PC. Then, flanges (wing portions) on both sides of the PC slab 110 are formed or extended by the on-site concrete poured on the first support plate 140 .

Accordingly, the rib 130 may be continuously formed along the longitudinal direction of the PC slab under both ends of the main body 120 to support the load of the main body 120 . Preferably, the outer side of the rib 130 is preferably located on the same plane as the width direction end of the main body (120). In addition, a reinforcing bar 134 for applying a pretension may be installed at a lower portion of the rib 130 .

The first support plate 140 serves as a formwork of the concrete cast on site, and serves to support the load of the cast concrete. And, after the cast-in-place concrete is cured, it is not removed and serves to resist the finishing load and live load together with the cast-in-place concrete and the PC slab 110 .

1, the truss deck is used as the first support plate 140, but a thin plate, a form made of a thin steel plate, a deck plate, a corrugated steel plate, a corrugated steel plate, a fiber mixed thin cement plate, etc. may be used as the first support plate.

As described above, the PC slab 110 is installed on the PC beam 210 so as to be spaced apart by a predetermined interval, and the outer side of the rib 130 is located substantially on the same plane as the width direction end of the body 120, A first support plate 140 is installed between the PC slab 110 , and on-site concrete is poured on the PC slab 110 and the first support plate 140 . And, since the width of the first support plate 140 can be increased or decreased as necessary, the width of the wide structure can be adjusted.

In addition, after the PC slab 110 and the first support plate 140 are installed on the unit PC beam 212, electrical equipment and/or firefighting equipment, etc., for example, an electric wire, a water pipe, a drain pipe, are placed on the part where on-site concrete is to be poured. , at least one of a sewage pipe, a ventilation pipe, etc. may be installed prior to on-site concrete pouring. When the slab is made of 'only PC slab', it is difficult to perform facility construction such as electric wires at the construction site, but in the construction method according to the present invention, such facility construction becomes easy and simple.

Meanwhile, as shown in FIG. 2A , the upper portion of the outer side of the rib 130 may be formed as a vertical surface, and as shown in FIG. 2B , the outer side of the rib 130 may be formed as a vertical surface.

The maximum width of the existing double tee PC slab was 2.4m when transporting vehicles was considered. In contrast, if the width of the PC slab 110 according to the present invention is 2.2 m and the width of the first support plate 140 is 3 to 4 m, a double tee slab having an increased width to 5 to 6 m can be made. At this time, the PC slab 110 is a part constituting the body of the double tee slab, and pretension may be applied, and the first support plate 140 and the concrete part 150 thereon form a wing portion of the double tee slab.

Meanwhile, as shown in FIG. 3 , a water guide groove 124 may be formed in the protrusion 122 . The water guide groove 124 may be continuously formed along the longitudinal direction of the PC slab 110 , and is formed to be spaced downward from the first support plate 140 at a predetermined interval. When it rains or snows after the first support plate 140 is installed on the site, rust of the reinforcing bars may contaminate the side and lower surfaces of the PC slab 110 and the PC beam 210, and the water guide groove 124 is such rust. It induces drainage to prevent contamination and staining.

[Beam composed of PC beam, second support plate and cast-in-place concrete]

Figure 4a is a plan view showing the PC beam used in the present invention, Figure 4b is a plan view showing that the second support plate is installed on the PC beam, Figure 5 is a PC beam is installed continuously, the PC slab and the first and second support plates are PC It is a plan view showing the installation on the beam. In FIGS. 4B and 5 , the red dotted line indicates the second support plate 240 installed on the first stairway 214 , and the light blue dotted line indicates the second support plate 240 installed on the upper end of the unit PC beam 212 , purple The line represents the PC slab 110 , and the blue line represents the first support plate 140 .

The beam 200 includes a PC beam 210 and cast-in-place concrete. The PC beam 210 includes two unit PC beams 212 , and the two unit PC beams 212 are installed in parallel to each other so as to be spaced apart from each other by a predetermined interval. Each unit PC beam 212 may be installed on a unit PC column (312 in FIG. 12A) to be described later. And, although not shown in the drawings, reinforcing bars and the like are arranged inside the unit PC beam 212 .

7a to 7b, the unit PC beam 212 has a rectangular cross section, and a first step 214 is formed at both ends thereof. In addition, the two unit PC beams 212 are installed so that the first step sill 214 faces each other.

The second support plate 240 is installed so that both ends thereof span the two unit PC beams 212 . Specifically, at both ends of the unit PC beam 212, both ends of the second support plate 240 are installed to span the first step sill 214, and in the remaining portions except for the both ends, the second support plate 240 is Both ends are installed so as to span the upper end of the unit PC beam (212). And, on-site concrete is poured on the second support plate 240 . Therefore, the thickness of cast-in-place concrete is thicker at both ends of the beam than the rest of the beam. This configuration is advantageous as it can more effectively resist the compressive stress acting on the underside of both ends of the beam.

The on-site concrete pouring may be made together with the on-site pouring made on the slab 100 or may be made separately.

The interval between the two unit PC beams 212 may be increased or decreased as needed. Accordingly, if the width of the second support plate 240 is adjusted, the width of the wide cross-sectional structure may be adjusted.

A PC slab 110 is installed at the upper end of the outer section of the unit PC beam 212 . Although it is shown that the PC slab 110 is installed at the center and both ends of the unit PC beam 212 in FIGS. 5-6 , respectively, the installation position and number of the PC slab 110 may be increased or decreased as needed. The first support plate 140 is installed so that both ends thereof span the ends of the PC slab 110 .

Existing wide PC beams were difficult to produce because of their wide width, and the weight was excessive, so there were many difficulties in transporting and lifting. And, in order to change the width of the PC beam in the past, there was a problem that the construction cost increased and productivity was lowered because the iron plate form had to be adjusted in the factory. In contrast, the beam 200 according to the present invention is relatively light and small, and after transporting two unit PC beams 212 having a symmetrical structure from the factory to the site, lifting and assembling at the site, and a second support plate therebetween After installing the 240, it is possible to manufacture a beam 200 of a wide cross-section integrated through the cast-in-place concrete. And, since the second support plate 240 is installed between the two unit PC beams 212 , the width of the beam 200 can be freely changed by adjusting the width of the second support plate 240 .

Figure 7c shows that the second support plate 240 is made of a PC block (precast concrete block), Figure 7d shows a case in which the PC block has a stopping protrusion 244 . When the lower surface of the second support plate 240 coincides with the lower surface of the unit PC beam 212, it is advantageous because the load bearing force at the end of the beam increases by that much.

On the other hand, the above-described water guide groove may also be formed in the unit PC beam (212). Specifically, the water guide groove may be formed continuously along the longitudinal direction of the unit PC beam 212 on the upper surface of the unit PC beam 212, more preferably the water guide groove 124 of the PC slab 110. A water guide groove may be formed in a portion where rust, etc. discharged from the unit PC beam 212 falls. Accordingly, water, rust, cement paste, etc. that have moved through the water guide groove 124 of the PC slab 110 can be discharged to the ground after moving to the column through the water guide groove of the unit PC beam 212. have.

Figure 8a is a plan view showing another PC beam used in the present invention, Figure 8b is a plan view showing that the second support plate is installed on the PC beam, Figure 9 is the PC beam is continuously installed and PC slab and first and second It is a plan view showing that the support plate is installed on the PC beam. In FIGS. 8B and 9-10 , the red dotted line indicates the second support plate 240 installed on the first and third step sills 214 and 218 , and the light blue dotted line indicates the second support plate installed on the upper end of the unit PC beam 212 . 240 , the purple line represents the PC slab 110 , and the blue line represents the first support plate 140 .

The beam 200 includes a PC beam 210 and cast-in-place concrete. The PC beam 210 is composed of two unit PC beams 212 , and the two unit PC beams 212 are installed in parallel to each other so as to be spaced apart from each other by a predetermined interval. Each unit PC beam 212 may be installed on a unit PC column 312 to be described later. And, although not shown in the drawings, reinforcing bars and the like are installed inside the unit PC beam 212 .

11a to 11c, the unit PC beam 212 has a rectangular cross-section, and the first step 214 is formed at both ends thereof, and the second and third step steps 217 and 218 are formed in the central portion. this is formed The two unit PC beams 212 are installed so that the first step 214 faces each other, and cross-sectional reduction portions 215 may be formed at both ends thereof.

The second support plate 240 is installed so that both ends thereof span the two unit PC beams 212 . Specifically, at both ends of the unit PC beam 212, both ends of the second support plate 240 are installed to span the first step 214, and in the central part of the unit PC beam 212, the second support plate ( Both ends of the 240) are installed to span the third stair step 218, and in the remaining portions except for the both ends and the central portion, both ends of the second support plate 240 span the upper end of the unit PC beam 212. installed so as to Then, on-site concrete is poured on the second support plate 240 and the unit PC beam 212 . Therefore, the thickness of the cast-in-place concrete is thicker at both ends and the central portion of the beam 200 than the rest of the beam. This configuration is advantageous as it can more effectively resist stresses acting on the lower portion of both ends of the beam and the central portion of the beam.

A through hole 219 may be formed at the upper end of the central portion of the unit PC beam 212 . Preferably, the through hole 219 is formed to penetrate through the second and third step steps 217 and 218 . The reinforcing bars (not shown in the drawing) of the PC slab 110 are connected to the opposite PC slab 110 through the through-hole 219 , and thus a load may be transmitted.

Figure 11d shows that the second support plate 240 is made of a PC block (precast concrete block), Figure 11e shows a case in which the PC block has a stopping protrusion 244 . When the lower surface of the second support plate 240 coincides with the lower surface of the unit PC beam 212, it is advantageous because the load-bearing force increases by that much at the end of the beam.

On the other hand, after the unit PC beam 212 and the second support plate 240 are installed, electrical equipment and/or firefighting equipment may be installed in the part where on-site concrete is to be poured. When the beam consists of 'only PC beams', it was difficult to construct facilities such as electric wires, but in the construction method according to the present invention, such facility work becomes easy and simple.

[Pillar composed of PC column, third support plate, and cast-in-place concrete]

12a to 12c are plan cross-sectional views each showing a column constructed according to the present invention.

As shown in the figure, the pillar 300 is two unit PC (precast concrete) pillars 312, and two third support plates 340 installed to connect the two unit PC pillars 312, and two It includes concrete (not shown in the drawing) poured into the space surrounded by the unit PC column 312 and the two third support plates 340 . In addition, although not shown in the drawings, reinforcing bars and the like may be included in the column.

The unit PC pillars 312 are vertically installed so as to be spaced apart from each other at predetermined intervals. Preferably, a groove 322 is formed on the opposite side of the unit PC column 312 and the opposite side of the unit PC column 312 . The groove 322 is continuously extended along the longitudinal direction of the unit PC column 312 . And, at both ends of the groove 322, the jaws 324 are formed, and the jaws 324 support the third support plate 340 when concrete is poured in the field. Accordingly, the width between the third support plate 340 is narrower than the width of the unit PC column 312, and the width of the RC column portion formed by the cast-in-place concrete and the third support plate 340 is also the width of the unit PC column 312. narrower than the width

12D is a plan sectional view showing a modified example of the column. The pillar 300 is the same as the pillar except that the groove 322 is formed in the corner of the unit PC pillar 312 .

On the other hand, after the installation of the unit PC column 312 and the third support plate 340 is completed, at least one of an electric wire, a water pipe, a drain pipe, a sewage pipe, a ventilation pipe, etc. may be installed in the part where the on-site concrete is to be poured. When the pillar is made of 'only PC pillars', it is difficult to construct facilities such as electric wires, but in the construction method according to the present invention, such facility work becomes easy and simple.

100: slab with composite wide composite structure
110: PC slab 120: PC slab body
122: guiding jaw 124: water guide groove
130: rib of PC slab 132: shear reinforcement
134: reinforcing bar 140: first support plate
150: cast-in-place concrete part
200: Beam with composite wide composite structure
210: PC beam 212: unit PC beam
214: first stair step 215: reduced section
217: second stairway 218: third stairway
219: through hole 240: second support plate
242: formwork 244: jamming jaw
300: a column with a composite wide composite structure
312: unit pc pillar 322: groove
324: jaw 340: third support plate

Claims (10)

(a) at the construction site, installing the PC slab (precast concrete slab, 110) to the PC beam 210 at predetermined intervals;
(b) installing a first support plate 140 between the PC slabs 110; and,
(c) reinforcing on-site reinforcing bars on the PC slab 110 and the first support plate 140 and pouring concrete; a construction method of a precast concrete wide composite structure using a support plate, comprising: a. According to claim 1,
PC slab 110,
body 120;
Ribs 130 formed downward at both ends of the body 120 in the width direction; and,
Including;
The end of the first support plate 140 is a construction method of a precast concrete wide composite structure using a support plate, characterized in that it is installed on the protrusion 122. 3. The method of claim 2,
A water guide groove 124 is formed in the cladding 122, and the water guide groove 124 is formed long along the longitudinal direction of the PC slab 110 and is spaced downward from the first support plate 140 at a predetermined interval. ,
A method of constructing a precast concrete wide composite structure using a support plate, characterized in that the water flowing down on the first support plate 140 or the PC slab 110 is moved through the water guide groove 124 . 3. The method of claim 2,
PC beam 210 consists of two unit PC beams 212,
Before step (a),
(a1) installing two unit PC beams 212 to be spaced apart at a predetermined interval; and,
(a2) installing the second support plate 240 between the two unit PC beams 212;
The step (c) comprises pouring on-site concrete on the second support plate 240 and the PC beam 210, the construction method of the precast concrete wide composite structure using the support plate. (A) installing two unit PC beams 212 to be spaced apart at a predetermined interval;
(B) installing a second support plate 240 between the two unit PC beams 212; and,
(C) pouring on-site concrete on the second support plate 240; Construction method of a precast concrete wide composite structure using a support plate, characterized in that it comprises a. 6. The method according to claim 4 or 5,
At both ends of the unit PC beam 212 , a first step 214 is formed on the surfaces facing each other of the two unit PC beams 212 , and the second support plate 240 is on the first step 214 . Installation method of precast concrete wide composite structure using a support plate, characterized in that both ends of the unit PC beam 212 in step (c) have a thicker on-site concrete than the central part. 7. The method of claim 6,
In the central portion of the unit PC beam 212, a second step 217 is formed on the outside of the cross-section, and a third step 218 is formed on the inside of the cross-section,
The PC slab 110 is installed on the second step 217 and the second support plate 240 is installed on the third step 218 ,
A through hole 219 is formed at the upper end of the unit PC beam 212 so that the second and third step steps 217 and 218 are connected and communicated, and the reinforcing bar of the PC slab 110 is passed through the through hole 219 . A construction method of a precast concrete wide composite structure using a support plate, characterized in that it is connected to the opposite PC slab (110). 6. The method according to claim 4 or 5,
The pillar 300 is
Two unit PC pillars 312 vertically installed so as to be spaced apart from each other at a predetermined interval; and
Includes; two third support plates 340 installed to connect the two unit PC pillars 312;
The unit PC beam 212 is installed on the unit PC column 312,
The two unit PC pillars 312 and the two third support plates 340 form an inner space, and in the inner space, on-site concrete is poured, a method of constructing a precast concrete wide composite structure using a support plate . 9. The method of claim 8,
A groove 322 is formed on the side facing the opposite unit PC column among the unit PC pillars 312, and jaws 324 are formed at both ends of the groove 322, and the third support plate 340 is a jaw ( 324), characterized in that it is supported by a construction method of a precast concrete wide composite structure using a support plate. 10. The method of claim 9,
Between the steps (b) and (c) or between the steps (b) and (c), at least one of an electric wire, a water pipe, a drain pipe, and a ventilation pipe is installed in the part where the on-site concrete is to be poured , Construction method of precast concrete wide composite structure using support plate.

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