KR101458435B1 - Half precast concrete column manufacturing method using saddle-type ties and dual hoops and constructing method using the same - Google Patents

Abstract

The present invention relates to a casting machine comprising: a plurality of cast iron rods vertically disposed apart from each other in a column section; A lateral stiffening around a plurality of cast iron rods in the lateral direction of the cast iron; Inner root located at the inner side of the cast iron with a constant distance from the cast iron; And a "C" -shaped body portion, and a vertical portion vertically extending downward from both ends of the body portion, wherein the body is fixed on the outer muscle and the inner muscle, A first step of fabricating an assembled reinforcing bar net composed of a saddle-shaped band reinforcing bar provided for each row in which the large roots and the large roots are arranged; A second step of installing an inner mold and an outer mold on the inside and outside of the assembled reinforcing bar net; And a third step of pouring the PC part concrete between the outer formwork and the inner formwork to complete the HPC column, wherein the assembled reinforcing bar net is formed in the form of a hollow section on the cross section, And a method of constructing the HPC column using the double root.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a HPC column using a saddle-type band reinforcing bar and a double-

In the present invention, an assembled reinforcing bar net composed of a steel bar, a saddle bar bar and a double bar is manufactured so as to exhibit the buckling preventing effect of the steel bars and the lateral confinement effect of the inner concrete bars without crossing the columnar section, Wherein a concrete pillar is laid in the inside and outside of the net, concrete is laid therebetween, and a PC column having a hollow part thus completed is brought into the site to be installed, and a deep concrete is laid in the hollow part. (Hereinafter referred to as " HPC column ") and a construction method using the same.

The PC method has been actively applied in construction sites since the 1980s in order to reduce the labor cost and shorten the field in the field. The PC method is an example of an industrialized structure that constructs structures by assembling and joining factory-produced members in the field. It can reduce the construction period, increase the workability, reduce the labor force due to the decrease of field work, It is a method with various advantages. However, when the PC column is enlarged or long-termed, the weight of the PC becomes excessively limited due to its weight.

In order to solve the problem of the conventional PC column, efforts to reduce the weight of the PC by forming a hollow portion inside the column by centrifugal molding or inserting a steel pipe into the inside of the column, or dividing a PC column of one layer into several segments . However, centrifugal molding is disadvantageous in that there is a fear of material separation, manufacturing cost is high, and application of PC column is restricted due to various shapes and sizes. In the case of steel pipe insertion, the effect of reducing weight is not significant because of the low hollow ratio, and it is difficult to arrange the steel bars through the column section. In addition, in the case of segmented PC columns, additional processes and costs are incurred for splitting.

The connecting joint of conventional PC column is generally constructed by filling a mechanical coupling device (sleeve) at the lower end of the main column of the upper column, filling the main column or anchor bolt of the lower column with no shrinkage mortar, (Coupler) with the main steel bars or anchor bolts of the lower column, and then the non-shrinkage mortar is filled with the connection portions to be joined. Such connection joint is disadvantageous in that the construction is not simple, and the construction cost is high due to the material cost and the labor cost. In addition, the conventional PC-method beam-column joints are somewhat inferior in structural performance such as strength and stiffness due to lack of integrality, and are somewhat negative in terms of usability such as soundproofing and waterproofing.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the related art. The purpose is as follows.

First, the present invention provides a PC column having a hollow portion provided with an assembled reinforcing bar net at a factory, and a method of constructing and installing a HPC column in which only deep concrete is laid on a hollow portion in the field.

Second, the present invention provides a manufacturing method and a construction method of a HPC column in which reinforcing bars and formwork are omitted in the field.

Third, the present invention provides a manufacturing method and a construction method of a HPC column that can be constructed as a PC by forming a hollow in the PC column to reduce the weight of the column, even in the case of a large column or a long column.

Fourth, the present invention is to provide a manufacturing method and a construction method of a HPC column in which a joint is integrally formed through in-situ casting.

Fifth, the present invention is to provide a manufacturing method and a construction method of a HPC column capable of making various cast iron rods using a hollow portion.

Sixth, the present invention provides a manufacturing method and a construction method of an HPC column that is excellent in quality and durability and is environmentally friendly.

According to an aspect of the present invention, there is provided a rolling mill, comprising: a plurality of cast iron rods vertically disposed apart from each other in a column section; A lateral stiffening around a plurality of cast iron rods in the lateral direction of the cast iron; Inner root located at the inner side of the cast iron with a constant distance from the cast iron; And a "C" -shaped body portion, and a vertical portion vertically extending downward from both ends of the body portion, wherein the body is fixed on the outer muscle and the inner muscle, A first step of fabricating an assembled reinforcing bar net composed of a saddle-shaped band reinforcing bar provided for each row in which the large roots and the large roots are arranged; A second step of installing an inner mold and an outer mold on the inside and outside of the assembled reinforcing bar net; And a third step of pouring the PC part concrete between the outer formwork and the inner formwork to complete the HPC column, wherein the assembled reinforcing bar net is formed in the form of a hollow section on the cross section, And a method of constructing the HPC column using the double root.

According to the present invention, the following effects are expected.

First, according to the present invention, the HPC column is manufactured in the factory and only the deep concrete is laid on the hollow part in the field, so the air per unit of the frame construction can be shortened.

Second, the present invention can reduce construction costs such as material cost and labor cost by omitting the reinforcing bars and formwork in the field, and the construction is simplified, and the field work environment becomes good.

Third, since the weight of the PC column is greatly reduced due to the hollow portion of the present invention, it is advantageous to carry and bulk the PC column.

Fourth, the present invention is superior in structural performance such as strength and rigidity due to the integrated construction of the joints by putting in the field, and the usability such as soundproofing and waterproofing is increased, and the cost and effort required for connecting the structural members at the joints can be reduced.

Fifth, according to the present invention, not only the mechanical joint of the cast iron muscle but also the overlapping joint using the hollow portion can be used, so that it is possible to perform various cast iron joints according to the required performance and economical efficiency.

Sixth, the present invention minimizes material loss rate and saves industrial waste, and is eco-friendly, and it is easy to control quality because it is a PC method that manufactures externally exposed surfaces.

Seventh, the HPC column of the present invention can be applied not only to a square shape but also to a circular cross-section, and it is also possible to arrange various cross-sectional sizes and cast iron rods.

FIGS. 1A to 1D are flowcharts illustrating a manufacturing process of an assembled reinforcing bar network in a method of manufacturing an HPC column according to the present invention.
2 shows an embodiment of an assembled reinforcing bar network in a method of manufacturing an HPC column according to the present invention.
FIGS. 3A to 3C are cross-sectional views illustrating a method of manufacturing a HPC column according to an embodiment of the present invention. FIGS. 3A to 3C are cross- In which HPC columns are filled with deep concrete.
FIG. 4 shows an embodiment of a HPC column having a hollow portion completed by the method of manufacturing the HPC column according to the present invention.
5 is a view showing a construction method using a lap joint of a HPC column according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention includes a plurality of cast iron rods (120) vertically spaced apart from each other by a columnar section; An outer core 140 which surrounds a plurality of cast iron rods 120 in the lateral direction outside the cast iron rope 120; An inner major axis 160 disposed at a predetermined distance from the main steep wire 120 at an inner side of the main steep wire 120; And a vertical portion 180b vertically extending from both ends of the body portion 180a to the lower portion of the body portion 180a so as to surround the cast iron rope 120 adjacent to the sides and edges on the columnar section And a saddle-shaped band reinforcing bar 180 installed on each of the inner and outer roots 160 and 140 in a manner of being mounted on the outer roots 140 and the inner roots 160, A first step of fabricating the net 100; A second step of installing an inner mold 500 and an outer mold 400 on the inner and outer sides of the assembled reinforcing bar 100; And a third step of pouring PC concrete 200 between the outer mold 400 and the inner mold 500 to complete the HPC column. The assembled reinforcing bar 100 has a hollow section The present invention relates to a method of manufacturing a HPC column using a double girder and a construction method thereof.

FIGS. 1A to 1D are flow charts of a manufacturing process of the assembled reinforcing bar 100 in the method of manufacturing the HPC column according to the present invention. FIG. 2 is a sectional view of the assembled reinforcing bar 100 in the method of manufacturing the HPC column according to the present invention. Fig. The assembled reinforcing bar 100 may be applied in various sizes and shapes, such as rectangular and circular, if the present steel reinforcing bar specifications are satisfied. Also, it is preferable that the cast iron rope 120 of the reinforcing bar 100 is protruded from the concrete to be laid later. In order to smooth the joining of the upper and lower pillars to the cast iron rope (120) when the HPC pillars of Section 1 are installed and the upper pillars are installed above the pillars. In addition, when the upper and lower pillars 120 overlap with each other, the protruding length of the main reinforcement 120 becomes longer by the overlap length required in the current design standard, and offset bending is required. For reference, the lap joint of the cast iron rope 120 is a method commonly used in the existing RC structure, which is simpler and more economical than a conventional mechanical joining method such as a sleeve or a coupler used in a PC column. In some cases, additional reinforcing bars connecting the upper and lower pillars may be additionally provided to reinforce the structural performance of the lap portion.

The outer core 140 is installed outside the cast iron core 120 so as to surround the cast iron core 120. The inner core core 160 is disposed inside the cast iron core 120 at a predetermined distance from the cast iron core 120, The vertical portion 180b of the saddle-type band reinforcing bar 180 is fitted and fixed. The outer and inner muscles 140 and 160 may be formed to have a hollow section 300 on a columnar section. Depending on the shape, the inner and outer roots 140 and 160 may be angular or circular.

The saddle-shaped band reinforcing bar 180 is composed of a "C" -shaped body portion 180a and vertical portions 180b extending vertically downward from both ends of the body portion 180a. The saddle-shaped band reinforcing bar 180 is fixed on the extracorporeal muscle 140 and the intramuscular muscle 160 by surrounding the adjacent muscle 120 on the sides and sides of the column, It is installed for every row to be laid. The saddle-shaped bar reinforcement 180 at the corners serves as a reinforcing bar that completely connects the four sides of the rectangular HPC column to each other.

The transverse torsion bars composed of the saddle-type belt reinforcement (180) and the inner and outer reinforcement roots (140,160) serve to inhibit the buckling of the cast iron rods (120) without penetrating the section and provide lateral confining force to the inner concrete. Accordingly, it is preferable to use a high-strength deformed reinforcing bar having a large diameter as much as possible, and the reinforcing bars should be installed at regular vertical intervals over the entire length of the column. In addition, the saddle-shaped band reinforcing bar 180 is configured to surround two to three main reinforcing bars 120 so as to satisfy the current design criteria, and the inner reinforcing bars 180 ) Is preferably installed as far as the inside of the cross section.

FIGS. 3A to 3C are cross-sectional views of the assembled reinforcing bar 100 of FIG. 1 in which the inner and outer molds are installed and the PC part concrete 200 is laid to complete the HPC column with the hollow part 300, 4 is a view illustrating an embodiment of the HPC column having the hollow part 300 completed through the method of manufacturing the HPC column of FIG. 1, and FIG. 4 is a view illustrating a process of completing the HPC column by filling the hollow part 300 with the deep concrete 220. FIG. .

As shown in FIGS. 3 and 4, the HPC column is provided with inner and outer dies 400 and 500 on the inner side and the outer side of the assembled reinforcing bar 100 on the end face, and then the PC part concrete 200 is laid therebetween do. The inner and outer molds 400 and 500 must be able to withstand the side pressure when the PC concrete 200 is poured. However, if the inner mold 500 is difficult to remove, it remains in the column as an unstructured structure. In this case, since the concrete is used as a non-structural member but the concrete is a heterogeneous material, a discontinuity surface between the PC-part concrete 200 and the deep concrete 220 can be formed. Therefore, the inner mold 500 is made of a corrugated pipe, It is desirable to provide a shear connection member such as a stud bolt to ensure adhesion and integrity with concrete. However, since the inner formwork 500 must withstand the side pressure when the PC part concrete 200 is poured from the factory, iron and rubber tubes can be generally used. Depending on the shape of the column section, the inner and outer molds 400 and 500 may be angular or circular. It is desirable to use concrete with unconstrained concrete whose maximum aggregate size is controlled, in order to increase the filling ability of the concrete between dense reinforcing bars. In some cases, high performance concrete such as steel fiber reinforced concrete may be used for the PC part. This is because the steel fiber reinforced concrete can be minimized in damage to the PC part during manufacture, transportation and installation because of its excellent deformability, and structurally, it is possible to utilize the sufficient stress of the cast iron rope 120 by preventing the rough pressure of the PC part. In addition, when the PC part concrete 200 is required to have a high level of fire resistance and corrosion resistance, it is possible to use a special concrete, and an opening can be provided for electric wiring or the like, and an incidental material such as a buckle can be purchased.

5 is a view showing a construction method using a lap joint of a HPC column according to the present invention. In the construction method using the HPC column of the present invention, the HPC column having the hollow portion 300 is manufactured in advance in the factory, and the PC column is installed in the place where the pre-heating and level adjustment is performed, A first step of securing the first step; A second step of pouring the deep concrete 220 into the hollow part 300 of the HPC column installed by the above process; A third step of placing the end of the beam on the upper end of the pillar filled with the core to thereby install the beam; And a fourth step in which slab formwork or PC slabs are installed between the beam and the beam assembled with the column, the beam and the slab reinforcement are installed, and the slab concrete including the beam-column joint is integrally laid . In addition, when the lower end of the hollow PC column is firmly fixed to the lower end of the HPC column so that the strength of the hollow section can be sufficiently exhibited by using the mechanical joining of the cast iron rope 120, the HPC column may resist the installation load The beams may be installed before the deep concrete 220 is poured into the hollow part 300, so that simultaneous pouring of the vertical and horizontal members is possible.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

It is therefore intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

100: assembly reinforcing net
120: Cast iron rods
140:
160: My bosom
180: Saddle type band reinforcing bar
180a:
180b:
200: PC part concrete
220: Deep concrete
300: hollow part
400: outer die
500: inner die

Claims (7)

A plurality of cast iron rods 120 vertically disposed apart from each other in a column section; An outer core 140 which surrounds a plurality of cast iron rods 120 in the lateral direction outside the cast iron rope 120; An inner major axis 160 disposed at a predetermined distance from the main steep wire 120 at an inner side of the main steep wire 120; And a vertical portion 180b vertically extending from both ends of the body portion 180a to the lower portion of the body portion 180a so as to surround the cast iron rope 120 adjacent to the sides and edges on the columnar section And a saddle-shaped band reinforcing bar 180 installed on each of the inner and outer roots 160 and 140 in a manner of being mounted on the outer roots 140 and the inner roots 160, A first step of fabricating the net 100;
A second step of installing an inner mold 500 and an outer mold 400 on the inner and outer sides of the assembled reinforcing bar 100;
A third step of placing the PC part concrete 200 between the outer mold 400 and the inner mold 500 to complete the HPC column;
, ≪ / RTI >
In the construction method using the HPC column in which the hollow reinforcing bar 100 is formed in the shape of a hollow section 300 on the cross section,
A first stage in which a HPC column having a hollow portion 300 is manufactured in advance at a factory and then brought into a construction site to install a HPC column at a position where pre-heating and level adjustment are performed and a verticality is secured;
A second step of pouring the deep concrete 220 into the hollow part 300 of the HPC column installed by the first step;
A third step of installing a beam by placing an end of the beam on the upper end of the HPC column filled with the core by the second step;
A fourth stage in which the slab concrete or the PC slab is installed between the HPC column of the third stage and the assembled beam and the PC slab and the slab concrete including the beam- ;
And a method of constructing the HPC column using the double sidewall. A plurality of cast iron rods 120 vertically disposed apart from each other in a column section; An outer core 140 which surrounds a plurality of cast iron rods 120 in the lateral direction outside the cast iron rope 120; An inner major axis 160 disposed at a predetermined distance from the main steep wire 120 at an inner side of the main steep wire 120; And a vertical portion 180b vertically extending from both ends of the body portion 180a to the lower portion of the body portion 180a so as to surround the cast iron rope 120 adjacent to the sides and edges on the columnar section And a saddle-shaped band reinforcing bar 180 installed on each of the inner and outer roots 160 and 140 in a manner of being mounted on the outer roots 140 and the inner roots 160, A first step of fabricating the net 100;
A second step of installing an inner mold 500 and an outer mold 400 on the inner and outer sides of the assembled reinforcing bar 100;
A third step of placing the PC part concrete 200 between the outer mold 400 and the inner mold 500 to complete the HPC column;
, ≪ / RTI >
In the construction method using the HPC column in which the hollow reinforcing bar 100 is formed in the shape of a hollow section 300 on the cross section,
A first stage in which a HPC column having a hollow portion 300 is manufactured at a factory and then brought into a construction site to install a HPC column at a position where pre-heating and level adjustment are performed and a vertical degree is secured;
A second step of installing a beam by placing an end of the beam at the top of the HPC column erected by the first step;
A slab die or a PC slab is installed between the HPC column of the second stage and the assembled beam and the PC, and a vertical and horizontal member such as HPC column, beam, beam-column joint, slab, A third step of concurrently pouring the concrete of the concrete block;
And a method of constructing the HPC column using the double sidewall. 3. The method according to claim 1 or 2,
Wherein the PC part concrete (200) has a circular or square cross-sectional shape, and the method of constructing the HPC column using the double sided reinforcing bars. 3. The method according to claim 1 or 2,
Wherein the PC part concrete (200) is a high-permeability concrete or a high-performance concrete, and wherein the PC part concrete (200) is high-permeability concrete or high-performance concrete. delete The method of claim 1,
The HPC column is installed on the upper part after the slab concrete pouring in the fourth step,
Wherein the HPC column at the bottom and the HPC column at the top are connected using a lap joint of a cast iron (120). Description: TECHNICAL FIELD The present invention relates to a method of constructing a HPC column using a saddle- 3. The method of claim 2,
The HPC column is installed on the upper part after the slab concrete installation of the third step,
Wherein the HPC column at the bottom and the HPC column at the top are connected using a lap joint of a cast iron (120). Description: TECHNICAL FIELD The present invention relates to a method of constructing a HPC column using a saddle-

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