KR102643102B1 - Precast concrete structure for rapid construction - Google Patents

Abstract

In the present invention, the head of a PC column is provided with a head and a mounting portion in order on the upper part of the column body so that the head protrudes outward, and while the PC girder is mounted on the head, the upper PC column is constructed on the upper part of the lower PC column before slab construction. This is about a precast concrete structure that can significantly shorten the construction period and enable rapid construction with excellent structural performance at the column-girder joint.
The present invention is provided with a column body and a pair of capitals provided on the upper part of the column body so that the area is larger than that of the column body and spaced apart from each other on the left and right, and the upper part of the capital head protrudes so that the area is smaller than that of the capital head. A plurality of PC pillars consisting of a mounting portion provided so that the upper PC pillar can be mounted on the PC pillar; and a lower flange whose longitudinal ends are mounted on the upper surface of the head of the PC column, and a pair of inclined webs and a PC girder whose upper ends are formed to be inclined upward and outward at both ends of the lower flange and protrude to the outside of the mounting portion of the PC column. A PC girder provided to protrude from the end and composed of end anchoring reinforcing bars located between the pair of mounting portions; It is characterized by being composed of.

Description

Precast concrete structure for rapid construction}

In the present invention, the head of a PC column is provided with a head and a mounting portion in order on the upper part of the column body so that the head protrudes outward, and while the PC girder is mounted on the head, the upper PC column is constructed on the upper part of the lower PC column before slab construction. It is about a precast concrete structure that can significantly shorten construction period and enable rapid construction with excellent structural performance at the column-girder joint.

To construct a building, the reinforced concrete method (hereinafter referred to as the 'RC method'), in which various structural members are constructed by installing reinforcing bars and forms and pouring concrete on site, has low construction costs and allows for detailed changes on site as needed. It has been widely used due to its advantage of being easy to process joints.

However, the conventional RC method is labor-intensive, so it is greatly influenced by the supply and demand of manpower and materials, and it is difficult to secure uniform quality.

Accordingly, the adoption of the precast concrete method (hereinafter referred to as the 'PC method') using precast concrete members prefabricated in factories has recently been increasing.

In particular, buildings with standardized floor plans have fewer member types, simple joint design, and are easy to apply to a one-way slab structure without beams, making the PC method more competitive than the RC method in terms of construction cost as well as construction time.

In this PC method, a PC girder is mounted on the top of the PC column, a PC slab is constructed on the top of the PC girder, and generally, in order to join the PC column and the PC girder, concrete is poured into the joint at the site to integrate it.

In this case, in order to construct the upper floor, the upper PC pillar is installed after completing the construction of the PC column, PC girder, and slab of the lower floor (Registered Patent No. 10-2088191, etc.), and the upper PC pillar is installed after completing the lower slab construction. Therefore, it takes a lot of air.

Therefore, in Registered Utility Model No. 20-0369675, a plurality of PC columns are arranged vertically and spaced apart in a single multi-layer column, and are manufactured to be connected with reinforcing bars, etc., so that two or more layers of PC columns are installed at once.

However, the above technology has limitations that make it difficult to apply in buildings with high floor height due to the increased weight of the PC pillar due to the large weight of the PC pillar.

In order to solve the above problems, the present invention seeks to provide a precast concrete structure capable of rapid construction that can significantly shorten the construction period by allowing the upper PC member to be constructed immediately after installing the lower layer PC member.

The present invention seeks to provide a precast concrete structure capable of rapid construction with excellent structural performance of column-girder joints.

The present invention according to a preferred embodiment is provided with a pillar body and a pair of capitals provided on the upper part of the pillar body so that the area is larger than that of the pillar body, and a pair are spaced apart from each other on the left and right, and the upper part of the capital head has an area larger than that of the capital head. A plurality of PC pillars consisting of a mounting portion that protrudes to be reduced and is provided at the top so that the upper PC pillar can be mounted; and a lower flange whose longitudinal ends are mounted on the upper surface of the head of the PC column, and a pair of inclined webs and a PC girder whose upper ends are formed to be inclined upward and outward at both ends of the lower flange and protrude to the outside of the mounting portion of the PC column. A PC girder provided to protrude from the end and composed of end anchoring reinforcing bars located between the pair of mounting portions; It provides a precast concrete structure capable of rapid construction, characterized in that it consists of.

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The present invention according to another preferred embodiment provides a precast concrete structure capable of rapid construction, characterized in that the end of the PC girder is provided with end anchoring reinforcing bars that extend toward the PC column and are located on both sides of the mounting portion.

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The present invention according to another preferred embodiment provides a precast concrete structure capable of rapid construction, characterized in that a plurality of rows of shear key grooves are formed vertically and longitudinally on the inner surface of each of the mounting portions.

The present invention according to another preferred embodiment provides a precast concrete structure capable of rapid construction, characterized in that internal band reinforcement is placed inside the mounting portion.

The present invention according to another preferred embodiment provides a precast concrete structure capable of rapid construction, wherein an anchoring bar is provided to protrude from the upper part of the head between the mounting portions, and the anchoring bar is provided with a packing disk.

The present invention according to another preferred embodiment provides a precast concrete structure capable of rapid construction, characterized in that a plurality of rows of external strip reinforcing bars are provided on the outside of the mounting portion.

According to the present invention, the head of the PC column, which is provided in order with the head and mounting portions on the upper part of the column body, is provided to protrude outward with an enlarged area, so that the end of the PC girder is directly mounted on the outside of the mounting portion from the upper part of the head. Thus, it is possible to provide a precast concrete structure capable of rapid construction and support.

Accordingly, the upper PC column can be installed in advance on the upper part of the lower PC column before slab construction after installing the PC member on the lower floor, which can greatly shorten the construction period. In addition, the construction period is excellent and the lifting capacity is excellent because the PC column on each floor can be produced and lifted individually. Less burden.

In addition, when the end anchoring rebar protruding toward the PC column is provided at the end of the PC girder, the end anchoring rebar is anchored to the concrete poured inside and outside the mounting portion, thereby ensuring excellent joint performance between the PC girder and the PC column.

1 is a perspective view showing a precast concrete structure of the present invention.
Figure 2 is a perspective view showing a PC pillar.
Figure 3 is a perspective view showing an embodiment in which an upper PC pillar is installed.
Figure 4 is a cross-sectional view showing the junction of a PC column and a PC girder.
Figure 5 is a perspective view showing a PC girder.
Figure 6 is a perspective view showing a state in which PC girders are installed on both sides of a PC column.
Figure 7 is a perspective view showing a PC pillar provided with a split-type mounting portion.
Figure 8 is a front view showing the PC pillar shown in Figure 7.
Figure 9 is a front view showing a PC pillar mounted on the upper part of the PC pillar shown in Figure 7.
Figure 10 is a cross-sectional view showing the junction of the PC column and PC girder shown in Figure 7.
Figure 11 is a perspective view showing a PC pillar provided with a mounting portion in which a shear key groove is formed.
Figure 12 is a perspective view showing a PC pillar equipped with a packing disk.
Figure 13 is a cross-sectional view showing a PC girder provided with a top plate.

Hereinafter, the present invention will be described in detail according to the accompanying drawings and preferred embodiments.

1 is a perspective view showing the precast concrete structure of the present invention. And FIG. 2 is a perspective view showing a PC column, FIG. 3 is a perspective view showing an example in which an upper PC column is installed, and FIG. 4 is a cross-sectional view showing the junction of a PC column and a PC girder.

As shown in Figures 1 to 4, the precast concrete structure capable of rapid construction according to the present invention includes a pillar body 11 and a main body provided on the upper part of the pillar body 11 so that the area is larger than the pillar body 11. It consists of a head 12 and a mounting portion 13 that protrudes from the upper part of the head 12 to have a smaller area than the head 12 so that the upper PC pillar 1 can be mounted on the top. Multiple PC Pillars (1); And a PC girder (2) whose both ends are mounted on top of the head (12) of the neighboring PC column (1); It is characterized by being composed of.

The present invention is intended to provide a precast concrete structure that allows construction of the upper PC member immediately after installing the lower layer PC member, thereby significantly shortening the construction period, and enables rapid construction with excellent structural performance at the column-girder joint.

The precast concrete structure of the present invention includes a plurality of rows of PC columns (1) installed to be spaced apart from each other and a PC girder (2) whose ends are mounted on top of the PC columns (1).

The PC column (1) and PC girder (2) are precast concrete members that are pre-manufactured in a factory, etc.

The PC pillar (1) consists of a pillar body (11), a head part (12), and a mounting part (13).

The pillar body 11 is a main part of the PC pillar 1 that secures the floor height and transmits the load of the horizontal member to the lower part.

The capital head 12 is provided on the upper part of the pillar body 11.

The capital portion 12 has an area larger than that of the column body 11 and protrudes to a certain extent to the outside of the column body 11.

The mounting portion 13 is formed protruding from the upper portion of the capital head 12.

The mounting portion 13 has a smaller area than the head portion 12, and a stepped portion protruding from the outside of the mounting portion 13 is formed on the upper portion of the head portion 12.

Accordingly, the end of the PC girder (2) can be mounted on the outside of the mounting portion (13) at the top of the head portion (12).

The upper PC pillar 1 is mounted on the upper part of the mounting portion 13 (FIG. 3).

Therefore, the upper PC column (1) can be installed in advance on the lower PC column (1) before slab construction, thereby shortening the construction period.

The mounting portion 13 may be formed at a height corresponding to the slab pouring height.

The load of the upper PC pillar (1) is transmitted to the lower pillar body (11) through the mounting portion (13). Therefore, the mounting portion 13 may be formed with the same cross section as the pillar body 11.

The main bars placed inside the PC pillar (1) may be continuously arranged inside the pillar body (11), the head part (12), and the mounting part (13).

When installing the upper PC pillar (1), in order to adjust the verticality of the upper PC pillar (1), the upper PC pillar (1) is spaced at a certain distance from the top of the lower PC pillar (1), and a simple plate (101) is placed in the space. It can be supported by inserting the back. In this case, non-shrinking mortar (M), etc. may be filled in the space (FIG. 4).

A PC slab (3) may be mounted and installed across the upper part of the PC girders (2) in adjacent rows (FIGS. 1 and 4).

Topping concrete 30 may be poured on the upper part of the PC slab 3 (FIG. 4).

When pouring the topping concrete 30, the concrete may be poured on the outside of the mounting portion 13 on the upper part of the head 12.

Figure 5 is a perspective view showing a PC girder, and Figure 6 is a perspective view showing a PC girder installed on both sides of a PC column.

As shown in FIGS. 4 to 6, the PC girder (2) has a longitudinal end of a lower flange (21) mounted on the upper surface of the main head (12) of the PC pillar (1) and the lower flange (21). It is formed at both ends to be inclined upward and outward, and the upper end may be composed of a pair of inclined webs 22 that protrude to the outside of the mounting portion 13 of the PC pillar 1.

In the present invention, while mounting the PC girder (2) on the PC pillar (1), the upper PC pillar (1) is also attached to the upper part of the head (12) of the PC pillar (1) in order to be directly mounted on the upper part of the lower PC pillar (1). The mounting portion 13 is formed to protrude.

However, when the PC slab (3) is mounted on the upper part of the PC girder (2), the PC slab (3) is It may be difficult to mount.

Therefore, the PC girder (2) can be configured in the form of a wide girder whose width is larger than that of the dance, but where the lower part is narrow and the upper part is wide.

Accordingly, the upper part of the PC girder (2) protrudes outside the mounting portion (13), thereby minimizing the amount of concrete of the PC girder (2) and allowing the PC slab (3) to be mounted on the PC girder (2) without interference from the mounting portion (13). ) It can be mounted at the top.

Additionally, since the upper part of the PC girder 2 is enlarged by the inclined web 22, the instantaneous gap between neighboring PC girders 2 can be reduced, thereby reducing the slab span. As a result, the thickness of the PC slab (3) can be reduced, making it economical.

The PC girder 2 is composed of a lower flange 21 and a pair of inclined webs 22, and a space 20 is formed between them. Therefore, the self-weight of the PC girder (2) can be minimized.

The inclined web 22 is formed to be longer than the lower flange 21 and can extend to both sides of the mounting portion 13.

That is, a receiving portion 201 is formed between the inclined webs 22 on both sides at the end of the lower flange 21, so that the mounting portion 13 of the PC pillar 1 can be accommodated (FIGS. 5 and 6 ). At this time, the inclined web 22 is supported by the mounting portion 13, thereby preventing the PC girder 2 from falling during construction and ensuring construction stability. In addition, the PC slab (3) can be mounted at the joint of the PC pillar (1).

As shown in FIGS. 4 and 5, the end of the PC girder (2) may be provided with end anchoring reinforcing bars (23) that extend toward the PC column (1) and are located on both sides of the mounting portion (13) so as to protrude. there is.

In order to moment connect the end of the PC girder (2) with the PC column (1), an end anchoring reinforcing bar (23) may be provided to protrude at the end of the PC girder (2).

The end anchoring reinforcing bar 23 is provided on the outside of the mounting portion 13 of the PC column 1 (FIG. 4).

The end anchoring reinforcing bar 23 is anchored inside the concrete poured outside the mounting portion 13, so that the end of the PC girder 2 is moment connected to the PC column 1.

The end anchoring reinforcing bar 23 may be provided on the lower side of the lower flange 21 or the inclined web 22 of the PC girder (2).

In order to moment connect the PC girder (2) to the PC column (1), horizontal anchorage reinforcing bars (24), which are the upper bars of the PC girder (2), can be placed in the field.

Figure 7 is a perspective view showing a PC pillar provided with a split-type mounting portion. And FIG. 8 is a front view showing the PC pillar shown in FIG. 7, FIG. 9 is a front view showing the PC pillar mounted on the upper part of the PC pillar shown in FIG. 7, and FIG. 10 is a front view showing the PC pillar shown in FIG. 7. This is a cross-sectional view showing the connection between a column and a PC girder.

As shown in FIGS. 7 to 10, a pair of the mounting portions 13 are provided to be spaced apart from each other on the left and right, and a pair of mounting portions 13 is located at the end of the PC girder 2 between the pair of mounting portions 13. The end anchorage reinforcement 23 may be provided to protrude.

The amount of reinforcement may be insufficient to moment connect the PC girder (2) to the PC column (1) with only the end anchorage reinforcing bars (23) or horizontal anchorage reinforcing bars (24) placed on both sides of the mounting portion (13).

Therefore, the mounting portion 13 is divided into left and right to form a pair spaced apart from each other, and an end portion is provided at the center of the end of the PC girder 2 in the space 130 between the pair of mounting portions 13. It can be configured to accommodate anchorage reinforcement (23).

In addition, the horizontal anchoring rebar 24 installed in the field can also be arranged to penetrate the space 130 between the pair of mounting parts 13 to transmit the negative moment of the end of the PC girder 2 (Figure 10).

The space 130 between the pair of mounting portions 13 is filled with concrete to form one pillar cross section together with the mounting portions 13.

Figure 11 is a perspective view showing a PC pillar provided with a mounting portion in which a shear key groove is formed.

As shown in FIG. 11, a plurality of rows of shear key grooves 132 may be formed to extend vertically on the inner surface of each mounting portion 13.

The end anchoring reinforcing bar 23 of the PC girder 2 can be accommodated inside the pair of mounting portions 13, and the end anchoring reinforcing bar 23 is located in the space 130 between the pair of mounting portions 13. ) is buried inside concrete that is cast in situ.

At this time, a shear key groove 132 may be formed on the inner surface of the mounting portion 13 to transmit and resist the load transferred to the concrete by the end anchoring reinforcing bar 23 to the mounting portion 13.

Since the concrete poured into the space 130 and the mounting portion 13 are structurally integrated by the shear key groove 132, the tensile or compressive force acting on the end anchoring rebar 23 is applied to the mounting portion 13 and the internal concrete. We can support together.

Although not shown in the drawing, the shear key groove 132 may also be formed on the outer surface of the mounting portion 13. In this case, the shear keyway 132 can transmit the load of the end anchoring reinforcing bar 23 disposed on the outside of the mounting portion 13 to the mounting portion 13.

As shown in FIG. 8, etc., internal band reinforcement 131 may be placed inside the mounting portion 13.

The pair of mounting portions 13 may each have internal band reinforcement 131 placed therein.

The internal band reinforcement 131 surrounds the outside of the main bars placed inside each mounting portion 13 to prevent buckling of the main bars, and restrains the internal concrete to increase the ductility and strength of the concrete.

Accordingly, each mounting part 13 functions as a pillar, and a pair of mounting parts 13 that behave as independent pillars are spaced apart from each other, so they behave similarly to a coupled shear wall and have great ductility against lateral force. can be demonstrated.

Figure 12 is a perspective view showing a PC pillar equipped with a packing disk.

As shown in FIGS. 9 and 12, a fixing bar 14 is provided to protrude from the upper part of the main head 12 between the mounting portions 13, and a packing disk 15 is provided on the fixing bar 14. It can be provided.

A fixing bar 14 is provided on the upper part of the PC pillar 1 to protrude upward for connection with the upper PC pillar 1, and the fixing bar 14 is inserted into the lower part of the upper PC pillar 1. A sleeve 16 may be provided.

When the mounting portions 13 are formed as a pair spaced left and right apart, the fixing bar 14 may be provided both at the top of the mounting portion 13 and between the pair of mounting portions 13.

With the fixing bar 14 of the lower PC pillar 1 inserted into the sleeve 16, the fixing bar 14 can be fixed by injecting non-shrinking mortar (M), etc. into the sleeve 16. .

At this time, the space between the upper PC pillar (1) and the mounting part (13) of the fixing bar (14) provided on the upper part of the mounting part (13) is not large, so the non-shrinking mortar (M) is injected through the sleeve (16). It can fill the upper space of the mounting portion 13.

In contrast, when the space 130 between the pair of mounting parts 13 is filled with the non-shrinking mortar (M) that is filled in the sleeve 16, the amount of non-shrinking mortar (M) required increases significantly, making it uneconomical.

Therefore, by closing the lower part of the sleeve 16 where the fixing bar 14 located in the space 130 between the pair of mounting parts 13 is inserted, the non-shrinking mortar (M) injected into the sleeve 16 is A packing disk 15 may be provided on the upper part of the fixing bar 14 to prevent it from flowing into the space 130 located below.

The packing disk 15 may be made of an elastic material such as rubber.

One side of the packing disk 15 is cut so that the fixing bar 14 can be inserted therein.

After installing the upper PC pillar (1), the packing disk (15) can be slid upwards along the fixing bar (14) and brought into close contact with the lower surface of the upper PC pillar (1) to close the lower part of the sleeve (16). .

The space 130 between the pair of mounting parts 13 can be filled by pouring concrete together when pouring topping concrete 30 on the upper part of the slab.

As shown in FIGS. 4, 12, etc., a plurality of rows of external band reinforcing bars 17 may be provided on the outside of the mounting portion 13.

A plurality of rows of external band reinforcing bars 17 surrounding the outside of the mounting portion 13 may be provided on the outside of the mounting portion 13.

The external band reinforcement 17 is embedded in the concrete cast in situ on the outside of the mounting portion 13 and restrains the mounting portion 13.

Therefore, the rigidity and ductility of the joints can be increased by restraining the internal concrete at the joints of the upper and lower PC columns (1) and the PC column (1)-PC girder (2).

In addition, when placing the horizontal anchoring reinforcing bars 24 on site, the horizontal anchoring reinforcing bars 24 can be mounted on the external band reinforcing bars 17, so there is no need for a separate mounting tool.

Figure 13 is a cross-sectional view showing a PC girder equipped with a top plate.

As shown in FIG. 13, the upper plate 4 of the PC girder 2 can be mounted on top of the inclined webs 22 on both sides.

The upper plate 4 closes the upper part of the PC girder 2 to maintain the space 20 therein.

Therefore, since the topping concrete 30 does not flow into the interior of the PC girder 2 due to the upper plate 4 during slab construction, the weight of the structure can be reduced after construction.

The top plate 4 can serve as a stepping stone for workers during construction.

The top plate 4 may be a hollow core slab with a plurality of hollows 41 formed inside it in the longitudinal direction.

The hollow core slab has excellent bending rigidity and can reduce its own weight while ensuring uniform quality of the member, allowing the cross section to be constructed economically.

The hollow core slab can be produced with a mold of certain specifications. Therefore, if the distance between the tops of the inclined webs 22 on both sides is greater than the width of the hollow core slab, a hollow core slab with a narrow width can be produced by dividing in the width direction and used in combination.

1: PC Pillar 101: Simplelate
11: pillar body 12: capital head
13: Mounting portion 130: Space portion
131: Internal band reinforcement 132: Shear keyway
14: Fixing bar 15: Packing disk
16: Sleeve 17: External band rebar
2: PC girder 20: space part
201: Receiving part 21: Lower flange
22: Inclined web 23: End anchored rebar
24: Horizontal anchoring rebar 3: PC slab
30: Topping concrete 4: Top plate
41: Hollow M: Non-shrinking mortar

Claims (8)

A pillar body 11 and a pair of head parts 12 provided on the upper part of the pillar body 11 to have an area larger than that of the pillar body 11 are provided so as to be spaced apart from each other on the left and right, and the head parts 12 A plurality of PC pillars (1) consisting of a mounting portion (13) that protrudes at the upper part to have a smaller area than the capital head (12) and is provided at the top so that the upper PC pillar (1) can be mounted; and
The longitudinal end is formed to be inclined upward and outward at both ends of the lower flange 21 and the lower flange 21, which is mounted on the upper surface of the head 12 of the PC pillar 1, and the upper end is mounted on the PC pillar 1. It consists of a pair of inclined webs 22 protruding outward from the unit 13 and an end anchoring rebar 23 provided to protrude from the end of the PC girder 2 and positioned between the pair of mounting units 13. PC girders (2); A precast concrete structure capable of rapid construction, characterized in that it consists of.
delete In paragraph 1:
A precast concrete structure capable of rapid construction, characterized in that the end of the PC girder (2) is provided with end anchoring reinforcing bars (23) that extend toward the PC column (1) and are located on both sides of the mounting portion (13) so as to protrude. .
delete In paragraph 1:
A precast concrete structure capable of rapid construction, characterized in that a plurality of rows of shear key grooves 132 are formed vertically and longitudinally on the inner surface of each of the mounting portions 13.
In paragraph 1:
A precast concrete structure capable of rapid construction, characterized in that internal band reinforcement (131) is placed inside the mounting portion (13).
In paragraph 1:
A fixing bar 14 is provided to protrude from the upper part of the head part 12 between the mounting parts 13, and a packing disk 15 is provided on the fixing bar 14. Cast concrete structure.
In paragraph 1:
A precast concrete structure capable of rapid construction, characterized in that a plurality of rows of external band reinforcing bars (17) are provided on the outside of the mounting portion (13).

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