KR101438070B1 - Precast concrete girder for building construction - Google Patents

Precast concrete girder for building construction Download PDF

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Publication number
KR101438070B1
KR101438070B1 KR1020140067894A KR20140067894A KR101438070B1 KR 101438070 B1 KR101438070 B1 KR 101438070B1 KR 1020140067894 A KR1020140067894 A KR 1020140067894A KR 20140067894 A KR20140067894 A KR 20140067894A KR 101438070 B1 KR101438070 B1 KR 101438070B1
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KR
South Korea
Prior art keywords
building
concrete girder
precast concrete
reinforcing bars
rear end
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Application number
KR1020140067894A
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Korean (ko)
Inventor
김재포
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신우콘크리트산업 주식회사
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Priority to KR1020140067894A priority Critical patent/KR101438070B1/en
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Publication of KR101438070B1 publication Critical patent/KR101438070B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
    • E04B1/165—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with elongated load-supporting parts, cast in situ
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The present invention relates to a precast concrete girder for building construction, in which the bottom surface is formed with a recessed portion having a given area in a center portion, from a position spaced apart from a front end by a given distance to a position spaced apart from a rear end by a given distance, thereby easily loading the precast concrete girder on a vehicle to transport it to the site for constructing the building, and in which there is no exposed portion from the bottom surface of a ceiling after construction of an inter-floor slab is finished, so that the height of the building is not increased, and the precast concrete girder is easily applied to a high rise building to increase cost reducing effects if there is finishing construction for the ceiling. In the precast concrete girder of the present invention, the bottom surface of a front end or rear end is seated on the top surface of an extended portion of PC posts which are installed in horizontal and vertical directions at regular intervals on an upper area of a base bottom formed by curing the concrete on an excavated ground to construct the building. Shear reinforcing bars arranged in rows at both sides protrude upwardly from the top surface, and the shear reinforcing bars protrude at regular intervals in a longitudinal direction. The center of the bottom surface is provided with a recessed portion in the longitudinal direction.

Description

[0001] Precast concrete girder for building construction [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete girder for building construction, and more particularly, to a precast concrete girder for building construction, which comprises a bottom surface having a predetermined area across a central portion from a position spaced apart from a front end by a predetermined distance, It is possible to easily mount the vehicle for transportation to the site for construction of the building through the structure and to prevent the floor height of the building from being raised by making the portion exposed to the ceiling floor after the completion of the construction of the interlayer slab, The present invention relates to a precast concrete girder for building construction, which can be easily applied to a high-rise building through a ceiling, and can increase a cost saving effect when a ceiling is finished.

Generally, the construction of the building is performed by first curing the foundation floor of the building, then installing the wall surface on the foundation floor, and installing a plurality of pillars in the horizontal and vertical directions at regular intervals with respect to the area of the foundation floor.

Then, each end of the precast concrete girder is seated on the upper surface of the extension part of the column, which is applied as a precast concrete column, and a precast concrete slab is placed between the precast concrete girders After that, the interlayer slab was constructed by cast concrete.

The building is constructed through the above process.

FIG. 1 is a perspective view showing a pre-cast concrete girder for building construction according to the prior art, FIG. 2a is a perspective view showing a state in which a PC slab is seated in a construction structure in which a precast concrete girder for building construction according to the related art is applied And FIG. 2B is a side cross-sectional view showing a state in which the PC slab is seated in a construction structure of a building to which a precast concrete girder for building construction according to the related art is applied.

FIG. 3 is a side view showing a construction structure of a building to which a precast concrete girder for building construction according to the related art is applied, and FIG. 4 is a plan view showing a construction of a structure to which a precast concrete girder for building construction according to the related art is applied. Fig.

1 to 4, a precast concrete girder 50 for building construction according to the related art is constructed by an extension portion 50 formed on an upper part of a PC column 20 which is installed upright on a foundation floor 10 of a building at regular intervals, So that the end portion is seated on the upper surface 21.

The conventional precast concrete girder 50 has upper reinforcing ribs 51 protruding from the upper surface of the upper reinforcing ribs 51 at regular intervals in the width direction and having a predetermined distance in the longitudinal direction of the upper reinforcing ribs 51, And the lower reinforcing ribs 55 are protruded downward from the lower surface of the lower reinforcing ribs 51 at a distance from the rear end of the lower reinforcing ribs 51 by a distance from the front end.

3, the conventional precast concrete girder 50 having the above-described structure is constructed such that, when the building is constructed, the upper part of the upper part 21 of the PC column 20, which is erected on the foundation floor 10, The lower surface of the front end portion or the rear end portion is seated.

4, in the conventional precast concrete girder 50 as described above, the lower surface of the front end portion or the rear end portion is seated on the upper surface of the rim of the extension portion 21 of the PC column 20, After the both ends of the PC slab 60 are placed between the precast concrete girders 50 to be installed, the site concrete is placed and cured to complete the interlayer slab S as shown in FIG.

However, in the conventional precast concrete girder 50 applied at the time of construction of the above-mentioned structure, since the lower reinforcing ribs 55 are protruded on the lower surface, the pre-cast concrete girder 50 is loaded on the vehicle for transportation to the site for construction of the building There is a problem that it is not easy.

Further, since the lower reinforcing ribs 55 are projected downward to be exposed downward from the bottom of the ceiling after the construction of the interlayer slab S, it is difficult to apply to the high-rise buildings due to the increase in the height of the building. There is a problem that the effect of the present invention is deteriorated.

Therefore, it is possible to easily load the vehicle for transportation to the site for construction of the building, and to prevent the flooring of the building from being raised by preventing the portion exposed to the ceiling after the completion of the construction of the interlayer slab, It is required to research and develop a precast concrete girder which can be easily applied to a building and increase the cost reduction effect when the ceiling is finished.

In order to solve the above-mentioned problems, the present invention is applied to a structure of a bottom surface in which recesses are recessed with a certain area over a central portion from a position spaced apart from a front end by a predetermined distance from a rear end, And to provide a precast concrete girder for building construction that can be easily loaded on a vehicle for transportation to a site for construction.

Another object of the present invention is to provide a floor structure in which a recess is formed in a bottom surface of a floor having a predetermined area extending from a predetermined distance from a front end to a predetermined distance from a rear end thereof, It is possible to prevent the height of the floor of the building from being increased due to the absence of the exposed portion of the ceiling, thereby making it easy to apply to the high-rise building, and to increase the cost reduction effect .

The present invention for achieving the above-mentioned objects is as follows. That is, the pre-cast concrete girders for building construction according to the present invention are installed in the horizontal and vertical directions at regular intervals with respect to the upper surface area of the foundation floor formed by curing the concrete in the terraced terraces for building construction A pre-cast concrete girder for building construction in which a front end portion or a rear end bottom portion is seated on an upper surface of an extension portion of a PC column, wherein a shear reinforcing bar is protruded upward in a plurality of rows on both sides in the width direction on the upper surface, A plurality of protrusions are formed at predetermined intervals, and recesses are formed in the center of the lower surface in the longitudinal direction.

The recesses are recessed in the longitudinal direction at the center of the lower surface. The recesses are formed at a predetermined distance from the front end of the lower surface so that the lower surface of the front end portion or the rear end portion can be seated on the upper surface of the extension portion edge of the PC column, It is preferable that an upward depression is formed with a certain area at a central portion from the position where the distance is long.

The grooves may have a shape in which the cross section of the grooves is in a front-back direction and in the left-right direction.

The pre-cast concrete girder may be formed so that the lower edge portions of both sides of the concrete girder correspond to the grooves and are inclined downward inward at a predetermined angle when viewed from the front.

Further, the shear reinforcing bars are provided in a rectangular reinforcing type having rounded corners, and a plurality of reinforcements from the center portion to the lower portion so that the upper portion of the inverted "U " shape protrudes from the upper surface of the precast concrete girder It is good that it is embedded and fixed so as to intersect the reinforcing bars.

The effect of the precast concrete girder for building construction according to the present invention will be described as follows.

First, the structure of the lower surface formed with recesses having a certain area over a central portion from a position spaced a predetermined distance from the front end to a position spaced a predetermined distance from the rear end is applied to the lower surface, Can be easily performed.

Secondly, the bottom surface of the lower surface is formed with recesses having a certain area over a central portion from a position spaced a predetermined distance from the front end to a position spaced a predetermined distance from the rear end. So that the floor height of the building can be prevented from being increased. Accordingly, it is possible to easily apply to the high-rise building through the construction, and the cost reduction effect can be increased when the ceiling is finished.

1 is a perspective view showing a precast concrete girder for building construction according to the prior art.
FIG. 2A is a front sectional view showing a state in which a PC slab is seated in a construction structure of a building to which a precast concrete girder for building construction according to the prior art is applied; FIG.
FIG. 2B is a side cross-sectional view showing a state in which a PC slab is seated in a construction structure of a building to which a precast concrete girder for building construction according to the related art is applied.
3 is a side view showing a construction structure of a building to which a precast concrete girder for building construction according to the prior art is applied.
Fig. 4 is a plan view showing a construction structure of a building to which a precast concrete girder for building construction according to the prior art is applied. Fig.
5 is a perspective view showing a precast concrete girder for building construction according to the present invention.
6 is a bottom plan view showing a precast concrete girder for building construction according to the present invention.
7 is a side cross-sectional view of a precast concrete girder for building construction according to the present invention.
8 is a front sectional view showing a state in which a PC slab is seated in a construction structure of a building to which a precast concrete girder for building construction according to the present invention is applied.
9 is a side view showing a construction structure of a building to which a precast concrete girder for building construction according to the present invention is applied.
10 is a plan view showing a construction structure of a building to which a precast concrete girder for building construction according to the present invention is applied.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a precast concrete girder for building construction according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a perspective view showing a precast concrete girder for building construction according to the present invention, FIG. 6 is a bottom plan view showing a precast concrete girder for building construction according to the present invention, and FIG. Fig. 8 is a side cross-sectional view showing a precast concrete girder for building construction.

FIG. 8 is a front view showing a state in which the PC slab is seated in a construction structure of a building to which a precast concrete girder for building construction according to the present invention is applied, and FIG. 9 is a front view of a precast concrete girder for building construction according to the present invention. FIG. 10 is a plan view illustrating a construction structure of a building to which a precast concrete girder for building construction according to the present invention is applied.

5 to 10, a precast concrete girder 500 for building construction according to a preferred embodiment of the present invention includes a foundation floor 100 formed by curing concrete in a terraced building to construct a building, A front end portion or a rear end bottom portion is seated on the upper surface of the extension portion 210 of the PC column 200 installed in the horizontal and vertical directions at regular intervals with respect to the upper surface of the PC column 200.

In particular, the precast concrete girder 500 is formed by projecting a plurality of straight shear reinforcing bars 510 on the upper surface thereof in a plurality of rows on both sides in the width direction. The reinforcing shear reinforcing bars 510 are protruded And a recess 550 is formed at the center of the lower surface in the longitudinal direction.

In other words, the precast concrete girder 500 according to the present invention as described above has no lower reinforcing ribs protruding from the lower surface thereof, and the recess 550 is recessed in the longitudinal direction at the center of the lower surface. will be.

In other words, by applying the structure of the lower surface formed with recesses 550 as described above, it is possible to easily mount the vehicle for transportation to the site for the construction of the building, and furthermore, So that the floor height of the building can be prevented from being increased by preventing the portion exposed to the ceiling after the completion of the construction of the interlayer slab S so that the application to the high-rise building is facilitated, It is possible to increase the cost saving effect.

The grooves 550 in the precast concrete girder 500 according to the present invention are formed in the center of the lower surface in the longitudinal direction so that the upper surface of the extension portion 210 of the PC column 200, So that the lower surface of the front end portion or the rear end portion can be seated, a predetermined area is formed in the central portion from the position spaced apart from the front end of the lower surface by a predetermined distance from the rear end.

Furthermore, it is preferable that the groove 550 has the shape of a downwardly-tapered cross-section in the front, rear, left and right directions, and is upwardly recessed at the center.

In addition, the precast concrete girder 500 as described above is formed so as to correspond to the groove 550 and have both lower side edge portions thereof inclined downward inwardly at a predetermined angle when viewed from the front side.

Further, in the precast concrete girder 500 as described above, the shear reinforcement 510 is provided in a rectangular reinforcing bar type having rounded corners, and an upper portion of the inverted "U " (590) from the center portion to the lower end so as to protrude from the upper surface of the reinforcing bar (500).

8 to 10, a construction process of a building to which a precast concrete girder 500 for building construction according to the present invention is applied will be described. First, The lower surface of the front end portion or the rear end portion of the precast concrete girder 500 is seated on the upper surface of the extension portion 210 of the column 200.

At this time, the precast concrete girder 500 is installed on the foundation floor 100 in a plurality of upright positions spaced apart in the horizontal and vertical directions, so that the upper surface of the extension part 210 of the adjacent PC column 200 So that the lower ends of the front end portion and the rear end portion are respectively seated.

Then, both ends of the PC slab 600 are seated on the facing upper side of the pre-cast concrete girder 500 adjacent to each other at regular intervals.

Finally, concrete is placed on the upper surface of the extension part 210 of the PC column 200, the upper surface of the precast concrete girder 500 and the upper surface of the PC slab 600, (S).

At this time, an expansion rope 700 is preferably fixed to the upper surface of the extension part 210 of the PC column 200, the upper surface of the precast concrete girder 500, and the upper surface of the PC slab 600.

Of course, the PC slab 600 has a structure in which a reinforcing truss 610 is protruded from the upper surface of the PC slab.

A plurality of stone work outlets 250 are formed on the upper surface of the extension part 210 of the PC column 200 such that the shear reinforcements 700 are formed on the front shear reinforcement 510 of the precast concrete girder 500, It is preferable to install the interlayer slab S by placing the concrete in place after curing the reinforcing truss 610 of the PC slab 600 and the stowed rope 250 and curing the concrete.

According to the pre-cast concrete girder 500 for building construction according to the present invention for constructing a building as described above, a predetermined area It is possible to easily mount the vehicle for transportation to the site for construction of the building by applying the structure of the bottom surface in which the groove 550 is recessed.

In addition, the lower surface of the lower surface of the lower slab S is formed with recesses 550 having a predetermined area over a central portion from a position spaced a predetermined distance from the front end to a position spaced a predetermined distance from the rear end. It is possible to prevent the height of the floor of the building from being increased due to the absence of the portion exposed to the ceiling, thereby facilitating the application to the high-rise building and, in addition, do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, the invention is not limited thereto. Various modifications may be made by those skilled in the art. Are included in the scope of the present invention.

100: foundation floor
200: PC column
210: extension part 250: stone work
500: Precast concrete girder
510: shear reinforcement 550: groove
590: rebar
600: PC Slab 610: Reinforced Truss
700:
S: interlayer slab

Claims (5)

The extension part 210 of the PC column 200 installed at a predetermined interval with respect to the upper surface area of the foundation floor 100 formed by curing the concrete in the terraced place to construct the building, A precast concrete girder (500) for building construction in which a front end portion or a rear end lower portion is seated on an upper surface,
The shear reinforcing bars 510 are upwardly protruded in a plurality of rows on both sides in the width direction on the upper surface. The shearing reinforcing bars 510 are protruded at a predetermined interval in the longitudinal direction, And a concavity is formed in the pre-cast concrete girder.
The method according to claim 1,
The recess 550 is recessed in the longitudinal direction at the center of the lower surface so that the lower surface of the front end portion or the rear end portion can be seated on the upper surface of the extension portion 210 of the PC column 200 when the building is constructed,
Wherein the upper portion of the concrete girder is formed with a predetermined area at a central portion from a position spaced a predetermined distance from the front end to a position spaced a predetermined distance from the rear end.
3. The method of claim 2,
Wherein the groove (550) has a shape in which the cross section of the groove (550) has a downwardly directed light in the front, rear, and left and right directions, and is upwardly depressed at the center of the groove (550).
The method of claim 3,
The precast concrete girder (500) is formed to correspond to the grooves (550) and have lower side edge portions of both sides inclined downward inward at a predetermined angle when viewed from the front side.
The method according to claim 1,
The shear reinforcing bars 510 are provided in a rectangular reinforcing bar type having rounded corners, and the upper portion of the inverted " U "shape extends from the center portion to the lower portion so as to protrude from the upper surface of the precast concrete girder 500 And a plurality of reinforcing bars (590) extending from the reinforcing bars (590).
KR1020140067894A 2014-06-03 2014-06-03 Precast concrete girder for building construction KR101438070B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070053409A (en) * 2005-11-21 2007-05-25 오승탁 Precast concrete panel and nonsupport construction method of bridge's cantilever work utilizing p.c.p
KR101012402B1 (en) 2010-10-12 2011-02-09 (주)다음기술단 Prestressed concrete girder
KR20120013106A (en) * 2010-08-04 2012-02-14 세종대학교산학협력단 Connecting Structure between Pre-Stressed Concrete Girder and Precast Panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070053409A (en) * 2005-11-21 2007-05-25 오승탁 Precast concrete panel and nonsupport construction method of bridge's cantilever work utilizing p.c.p
KR20120013106A (en) * 2010-08-04 2012-02-14 세종대학교산학협력단 Connecting Structure between Pre-Stressed Concrete Girder and Precast Panel
KR101012402B1 (en) 2010-10-12 2011-02-09 (주)다음기술단 Prestressed concrete girder

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