KR20190023352A - Construction method of precast concrete column - Google Patents

Abstract

A precast concrete column construction method is disclosed. According to one aspect of the present invention, provided is a precast concrete column construction method including preparing a mold for a bottom pad at a factory and pouring and curing concrete to produce a bottom pad for match casting on an upper surface; forming a column segment mold at a factory with the top surface of the bottom pad as a bottom surface so as to match-cast the upper surface of the bottom pad and pouring and curing concrete to form a column segment; separating the column segment from the bottom pad and transporting the bottom pad to a construction site; installing a support structure supporting the bottom pad at the construction site and a concrete foundation mold to surround the support structure; lifting the bottom pad carried to the construction site over the support structure; and pouring and curing concrete in the concrete foundation mold to form a concrete base.

Description

Technical Field [0001] The present invention relates to a precast concrete column,

The present invention relates to a precast concrete column construction method. More particularly, the present invention relates to a precast concrete column construction method capable of shortening the construction period of precast concrete columns while applying the joint casting between the column segments.

In recent years, higher stiffness and larger size of structures have resulted in higher rigidity and improved workability. The reinforced concrete structure, steel structure and steel reinforced concrete structure, which have been widely used so far, are constructed by directly assembling formwork, reinforcing steel or steel frame on the site and constructing the concrete structure, Can fall.

As an alternative to this, precast concrete structures have been attracting attention as precast concrete structures are manufactured in accordance with strict manufacturing standards at the factory, conveyed and assembled in the field, and concrete is placed on the joints to join the structures.

On the other hand, the column is one of the basic skeletons for the space formation of civil engineering structures such as architecture and bridges, and serves to transmit the upper loads of the roof and the bottom plate to the ground. The columns are very important for constructing the three-dimensional shape of the building or civil structure. When the concrete column is manufactured by the precast method, the joints of the upper and lower columns between the column segments must be precisely matched due to introduction of the prestress, Casting method is used.

The cast casting method of precast concrete columns is such that the upper surface of the first column segment and the lower surface of the second column segment are matched with each other, a mold is formed with the upper surface of the first column segment as the bottom surface, It refers to a method of producing a column segment.

When a precast concrete column is not matched in a joint, when a prestress is introduced, stress concentration occurs locally and cracks or coating concrete may fall off at this part.

In the conventional case, when the concrete column is formed by match casting, the first column segment is delayed until the end of curing after the concrete foundation casting at the construction site. Thereafter, since the first column segment is formed as a match cast on the concrete foundation, and the remaining segments are formed by match casting, there is a problem that the precision of the precast method is poor.

Korean Patent Registration No. 10-0952207 (issued on April 09, 2010)

The present invention provides a precast concrete column construction method which can apply the joint casting between the column segments and shorten the precast concrete column construction period.

According to an aspect of the present invention, there is provided a method of constructing a precast concrete column, comprising: preparing a bottom pad for a match pad by laying a concrete for a bottom pad; Forming a mold for a column segment with the top surface of the bottom pad as a bottom surface so as to match cast the upper surface of the bottom pad at a factory, and pouring and curing the concrete to form a column segment; Separating the column segment from the bottom pad and transporting the bottom pad to a construction site; A support structure for supporting the bottom pad at a construction site; installing a concrete foundation die to surround the support structure; Lifting the bottom pad carried to the construction site over the support structure; Casting the concrete into the concrete foundation mold and curing the concrete to form a concrete foundation, a method of constructing a precast concrete column is provided.

The step of fabricating the column segment may include forming an upper surface of the column segment previously fabricated to be mass-cast with the upper surface of the column segment fabricated in the factory as a bottom surface of the column segment mold And pouring and curing the concrete to produce another column segment.

The through hole may be formed at the central portion of the bottom pad. In the case of forming the base of the concrete, the concrete may be installed in the through portion of the bottom pad.

The step of forming the concrete foundation then includes the steps of transporting the column segment to a construction site; The method may further include depositing the column segment on the upper surface of the bottom pad so that the top surface of the bottom pad and the bottom surface of the column segment are matched.

The support structure in the step of installing the concrete foundation formwork further comprises a steel pipe duct which is bent in an arcuate shape so that one end thereof is directed to the upper end of the support structure and the other end is exposed through the side surface of the concrete foundation formwork .

The bottom pad may be formed with a first tensile duct communicating with one end of the steel pipe duct and passing through the top and bottom of the bottom portion pad. The column segment is communicated with the first prestressing duct of the bottom pad, A tension duct may be formed, in which case the forming of the concrete foundation then comprises the steps of conveying the column segment to a construction site; Depositing the column segment on the top surface of the bottom pad such that the top surface of the bottom pad and the bottom surface of the column segment are matched; Disposing a tension member in the steel tube duct, the first tensile duct and the second tensile duct; Applying a prestress to the prestressing material, and fixing both ends of the prestressing material.

The support structure of the step of installing the concrete foundation mold includes at least three support pillars standing upright on the ground in the construction site and being stretchable in the vertical direction and a lateral support bar laterally joined to the support pillars In this case, the step of lifting the upper portion of the support structure may include lifting the lower pad on the upper portion of the support column, and leveling the lower pad by stretching the support column.

The bottom pad may include a height adjusting bolt threaded through an upper surface and a lower surface of the bottom pad, and a height adjusting nut coupled to an end of the height adjusting bolt; And a pad fixing unit including a fixing bolt threaded through an upper surface and a lower surface of the bottom pad, a pressure plate through which the fixing bolt penetrates, and a fixing nut screwed to the fixing bolt.

Wherein the support structure in the step of installing the concrete foundation form includes a support column corresponding to the height adjustment portion and the pad fixture portion and disposed in a standing position on the ground in a construction site, And a transverse support bar.

According to the embodiment of the present invention, it is possible to apply the joint casting between the column segments and shorten the construction period of the precast concrete column.

1 is a flow diagram of a precast concrete column construction method according to an embodiment of the present invention;
FIGS. 2 to 8 are flowcharts of a precast concrete column construction method according to an embodiment of the present invention. FIG.
Figure 9 illustrates a support structure used in a precast concrete column construction method in accordance with an embodiment of the present invention.
FIG. 10 is a view illustrating a height adjusting unit of a bottom pad used in a precast concrete column construction method according to an embodiment of the present invention; FIG.
11 is a view showing a pad fixing portion of a bottom pad used in a precast concrete column construction method according to an embodiment of the present invention.
12 is a modification of a bottom pad used in a precast concrete column construction method according to an embodiment of the present invention.
13 is a modification of the support structure used in the precast concrete column construction method according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: A duplicate description will be omitted.

FIG. 1 is a flowchart of a precast concrete column construction method according to an embodiment of the present invention, and FIGS. 2 to 8 are flowcharts of a precast concrete column construction method according to an embodiment of the present invention. 9 is a view showing a support structure used in a precast concrete column construction method according to an embodiment of the present invention. 10 is a view illustrating a height adjusting unit of a bottom pad used in a precast concrete column construction method according to an embodiment of the present invention. FIG. 11 is a cross- FIG. 2 is a view showing a pad fixing portion of a bottom pad.

1 to 11, the bottom pad 12, the height adjusting portion 14, the pad fixing portion 16, the sleeves 17 and 23, the height adjusting bolts 18 and 57, the height adjusting nut 19, The first bolt 20, the fixing nut 21, the pressure plate 22, the first tension duct 24, the reinforcing duct 26, the penetrating portion 27, the mold 28 for the pillar segment, The concrete structure 30, the concrete structure 32, the first column segment 34, the concrete foundation mold 36, the abandoned concrete 38, the support structure 40, the steel pipe duct 42, A second column segment 46, a coping portion 48, a support post 52, a transverse support bar 54, and a circular frame 56 are shown.

The method of constructing a precast concrete column according to the present embodiment includes the steps of preparing a bottom pad for a match casting of an upper surface by laying a concrete for a bottom pad, Wow; A mold for a column segment 28 is formed with the upper surface of the bottom pad 12 as a bottom surface so as to be a match casting with an upper surface of the bottom pad 12 at a factory, To form a column segment (34); Separating the column segment (34) from the bottom pad (12) and transporting the bottom pad (12) to a construction site; Providing a support structure (40) for supporting the bottom pad (12) at a construction site, and installing a concrete foundation form (36) to surround the support structure (40); Lifting the bottom pad (12) carried to the site above the support structure (40); And pouring and curing the concrete 32 into the concrete foundation mold 36 to form a concrete foundation 44.

In the present invention, a precast concrete column means a concrete column that supports an upper structure of a building structure, a bridge supporting a bottom plate of the bridge, and the like.

In this embodiment, a method of constructing a bridge pier by a precast method will be mainly described.

Hereinafter, a precast concrete column construction method will be described with reference to FIGS. 2 to 8. FIG.

First, as shown in FIG. 2, a mold for a bottom pad is installed in a factory, a concrete 32 is cured after curing, and a bottom pad 12 for match casting is formed on a top surface (S100). 'Factory' is a concept that is opposed to the 'construction site' where precast concrete columns are constructed. It is a place where high quality concrete structures can be manufactured according to strict production standards, and a factory is built near the construction site to produce precast concrete It is possible.

The bottom pad 12 is disposed at the lower end of the precast concrete column and is manufactured to a strict quality and forms the first column segment 34 in the factory with the bottom pad 12 and match casting, And is applied together with the concrete foundation 44 to form the lower end of the precast concrete column.

The upper surface of the bottom pad 12 and the lower surface of the first column segment 34 are matched to each other as a seam and the first column segment 34 left in the factory is matched with the second column segment 46 .

2, the method of forming the bottom pad 12 such as reinforcing steel reinforcement, formwork installation, pouring of concrete 32, curing and the like is not described in the description of the conventional art. And FIG. 2 shows the final bottom pad 12 after the form demolding

The lower pad 12 may be formed with a first tensile duct 24, a reinforcing duct 26, or the like for arranging a tension member, a reinforcing bar, or the like. A height adjusting unit 14 and a pad fixing unit 16 are provided for fixing to the support structure 40 after being transferred to the construction site and for leveling the support structure 40.

3, the top surface of the bottom pad 12 is matched to the top surface of the bottom pad 12 at the factory by the top surface of the bottom pad 12, And concrete is laid and cured to produce a column segment (S200). The bottom pad 12 manufactured in the previous process and the first column segment 34 to be placed thereon are matched at the joints of the upper and lower surfaces. For this, a mold 28 for a column segment is formed on the bottom pad 12 with the top surface of the bottom pad 12 as a bottom surface, and concrete segments are formed by pouring and curing the concrete. The bottom and inner sides of the formwork are provided with various sleeves 17 and 23 for reinforcing bars, prestressing ducts, reinforcing ducts and reinforcing ducts 26 suitable for forming vinyl and columns to facilitate separation of the first post segments 34 . Meanwhile, when the concrete is cured and the first column segment 34 is manufactured, the first column segment 34 is lifted from the bottom pad 12 and separated therefrom.

Next, as shown in Fig. 4, the column segment 34 is separated from the bottom pad 12, and the bottom pad 12 is conveyed to the construction site (S300). When the concrete is hardened to a certain strength according to the curing of the concrete 32, the mold 28 for the column segment is demoulded and the first column segment 34 is separated from the bottom pad 12. [ The separated first column segment 34 is left in the factory and the bottom pad 12 is transported to the construction site.

On the other hand, the first column segment 34 left in the factory is used to fabricate the second column segment 46 by match casting, as shown in Fig. That is, the column segment mold 28 is formed with the upper surface of the first column segment 34, which is manufactured first to be mass-cast with the upper surface of the first column segment 34 manufactured in the factory, as the bottom surface, And another second column segment 46 is fabricated. The bottom pad 12 is transported to the construction site and installed with the concrete foundation 44 and the column is capable of producing the column segments 34 and 46 during the curing of the concrete foundation 44 to shorten the air.

Conventionally, after the concrete foundation 44 is cured at the construction site, the first column segment is manufactured by mass-casting at the construction site to increase the construction period. However, in this embodiment, the bottom portion for the match casting of the first column segment 34 The pads 12 can be transported to the construction site to provide the concrete foundations 44 together and the plant can produce the remaining column segments 46 simultaneously while the concrete foundations 44 are cured to reduce the construction time of the precast concrete columns Can be greatly shortened.

6, a support structure 40 for supporting the bottom pad 12 at the construction site and a concrete foundation mold 36 for surrounding the support structure 40 are installed (S400) . Next, the bottom pad 12 transported to the site is placed on the support structure 40 (S500).

The bottom pad 12, which is transported to the construction site, should be installed at the correct location along with the concrete foundation 44. To this end, a support structure 40 for supporting and positioning the bottom pad 12 is disposed within the concrete foundation mold 36.

At the construction site, piles and the like may be embedded in the ground, and the concrete 38 may be formed thereon. A concrete foundation formwork 36 is laid on top of the abandoned concrete 38 such that the support structure 40 and the support structure 40 are surrounded. A reinforcing bar or the like for forming the concrete foundation 44 may be placed inside the concrete foundation formwork 36. [ When reinforcing steel reinforcement, reinforcing bars extending from the pile or the like may protrude to the upper portion of the formwork.

In the description of this embodiment, the state of the reinforcing bars is not shown, but it is obvious to those skilled in the art that the reinforcing bars are arranged in the concrete structure.

Referring to FIG. 9, a support structure 40 for use in this embodiment is shown. The support structure 40 according to this embodiment includes support pillars 52 that are disposed upright on the ground in the construction site and that support the bottom pads 12, And a support bar (54).

The bottom pad 12 placed on the support column 52 needs leveling for accurate positioning. In this embodiment, the bottom pad 12 is provided with a height adjustment portion 14, and the height adjustment portion 14 The height of the bottom pad 12 and the horizontal height of the bottom pad 12 are adjusted through the height adjusting portion 14 in a state where the supporting pillars 52 are supported. The position of the bottom pad 12 can be determined by adjusting the height of the height adjusting portion 14 after setting the position of the bottom pad 12 using a measuring instrument such as a light wave detector at a certain point of the bottom pad 12 have. Referring to FIG. 2, four height adjusting portions 14 are disposed on the bottom pad 12, and support pillars 52 are disposed on the bottom of the bottom pad 12 corresponding to the height adjusting portions 14, respectively.

The height adjusting portion 14 includes a height adjusting bolt 18 threaded through the top and bottom surfaces of the bottom pad 12 and a height adjusting nut 19 welded to the end of the height adjusting bolt ). 10, a pipe-shaped sleeve 17 passing through the bottom pad 12 is embedded in the bottom pad 12, and the height adjusting bolt 18 penetrates the sleeve 17 from the top surface to the bottom surface And the height adjusting nut 19 is joined to the end portion. The height adjusting bolt 18 can be screwed to the sleeve 17 and the height adjusting nut 19 can be moved up and down at the end portion according to the rotation of the height adjusting bolt 18 to adjust the height of the bottom pad 12. [ have.

On the other hand, when the position of the bottom pad 12 is determined by the operation of the height adjusting portion 14, it is necessary to fix the bottom pad 12 to the supporting structure 40 through the pad fixing portion 16. The pad fixing portion 16 includes a fixing bolt 20 threaded through the top and bottom surfaces of the bottom pad 12, a pressure plate 22 through which the fixing bolt 20 passes, a fixing bolt 20, (Not shown). 11, a fixing bolt 20, in which a pipe-shaped sleeve 23 penetrating the bottom pad 12 is embedded in the bottom pad 12 and a back pressure plate 22 is fitted on the top, And the height adjusting nut 19 is coupled to the end portion of the bottom plate.

The support posts 52 are disposed at the lower ends of the pad fixing portions 16 in correspondence with the pad fixing portions 16 in the same manner as the height adjusting portions 14. The fixing bolts 20 are screw- . Referring to FIG. 2, two pad processing sections are formed in the bottom pad 12. As shown in FIG. When the position of the bottom pad 12 is set through the height adjusting portion 14 and the fixing bolt 20 is screwed to the female threaded portion of the support column 52, The lower pad 12 is fixed to the support column 52 while pressing the upper portion of the lower pad 12.

The support structure 40 may then include a steel pipe duct 42 for penetrating the tension member. 9, one end of the steel pipe duct 42 is bent toward the upper end of the support structure 40 and the other end is bent in an arcuate shape so as to be exposed through the side surface of the concrete foundation formwork 36, And may be arranged in plural according to the number of the tension members.

By using iron steel pipe, it is made into arc shape, so that it can withstand the impact of concrete in the casting process of concrete and maintain arc shape. The steel pipe duct 42 is formed in an arc shape and disposed on the concrete foundation 44, so that the tension material disposed therein is formed into an arc shape, so that the tension force can be evenly distributed during the introduction of the prestress.

9, one end of the steel pipe duct 42 is fixed to the circular frame 56 along the circular frame 56 with a ring-shaped circular frame 56 at the upper end of the supporting structure 40, A plurality of steel pipe ducts 42 are arranged so as to face the sides of the concrete foundation formwork 36.

Once the support structure 40 and the concrete foundation formwork 36 have been installed, the bottom pads 12 transported to the construction site are placed over the support structure 40 and disposed. At this time, reinforcing bars (not shown) extending from the concrete foundation form 36 are passed through the reinforcing duct 26 of the bottom pad 12 and the steel pipe duct 42 of the supporting structure 40, (12) to the support structure (40) while aligning the first tenter duct (24) of the bottom layer (12). When the bottom pad 12 is installed, the leveling of the bottom pad 12 is performed according to the above-described method.

Next, the concrete 32 is laid and cured in the concrete foundation mold 36 to form a concrete foundation 44 (S500). 7, when the concrete 32 is laid and cured in the concrete foundation form 36 and then the concrete foundation form 36 is demolded, the concrete foundation 44 with the bottom pad 12 attached thereto, . During the formation of the concrete foundation 44 such as the casting and curing of the concrete 32, it is possible to manufacture the column segment 46 at the factory, so that the work can be carried out simultaneously at the construction site and the factory.

7, the column segment 34 is transported to the construction site and the column segment 34 is mounted on the top surface of the bottom pad 12 so that the top surface of the bottom pad 12 and the bottom surface of the column segment 34 are matched. (Step S600). The upper surface of the first column segment 34 is divided into the first column segment 34 and the second column segment 46. In the case of manufacturing a plurality of column segments 34 and 46 (in this embodiment, the first column segment 34 and the second column segment 46 in this embodiment) The second column segment 46 is matched to the lower surface of the column segment 46 to be fabricated in the factory.

 7, the bottom pad 12, which is already transported to the construction site, is constructed with a concrete foundation 44, and the bottom surface of the factory is provided with a first column segment 34 And the first column segment 34 and the matched second column segment 46 are transported to the field and then the first column segment 34 and the second column segment 46 are sequentially stacked. The present embodiment forms the bridge piers as precast concrete columns in which a coping portion 48 for supporting the bridge deck is additionally mounted on top of the second column segment 46. The upper surface of the second post segment 46 and the lower surface of the coping portion 48 are matched and the coping portion 48 is fabricated in the factory.

The seam side of the bottom pad 12 and the first column segment 34, the seam side of the first column segment 34 and the second column segment 46, the seam side of the second column segment 46 and the capping portion 48 The first column segment 34, the second column segment 46, and the coping portion 48 are stacked while the joints are matched to each other so that the joint surfaces are matched in the stacking process at the construction site.

On the other hand, the second pillar segment 46, the second pillar segment 46, and the coping portion 48 are formed with second tensile ducts 30 and 50 for penetrating the tension member. The column segments 34 and 46 and the coping portion 48 are placed so that the first tensile duct 24 and the second tensile duct 30 and 50 of the first and second tensile ducts 30 and 50 communicate with each other.

Next, prestressing is applied to the steel tube duct 42, the first prestressing duct 24 and the second prestressing duct 30, 50 through the prestressing material, and both ends of the prestressing material are fixed (S700). The first tensile duct 24 of the bottom pad 12 and the second tensile ducts 30 and 50 of the column segment and the coping portion 48 of the steel pipe duct 42 of the concrete foundation 44 communicating with each other, So that they are arranged and fixed. By introducing the prestress into the tensions, the precast concrete columns are integrated.

As described above, stress concentration is minimized at the joint surface even if a tension force is introduced by matching at the joint surfaces of the bottom pad 12, the column segments 34, 46, and the coping portion 48.

FIG. 12 is a modification of the bottom pad 12 used in the precast concrete column construction method according to an embodiment of the present invention. FIG. 13 is a perspective view of a support structure used in a precast concrete column construction method according to an embodiment of the present invention. (40).

12 shows a modified example of the bottom pad 12. The bottom pad 12 according to the present modification has a penetration portion 27 penetrating the upper and lower surfaces at a central portion thereof, Bubbles are prevented from being trapped under the bottom pad 12 when the concrete is poured into the penetration portion 27 and the concrete is put into the penetration portion 27 so that the bonding force between the concrete foundation 44 and the bottom pad 12 is increased .

13 shows a modified example of the support structure 40. The support pillars 52 of the support structure 40 are formed in a stretchable structure to adjust the height of the bottom pad 12. [ In one embodiment, the height of the bottom pad 12 is adjusted through the height adjuster 14 disposed in the bottom pad 12. However, in this modified example, the height of the support column 52 supporting the bottom pad 12 itself After the height is adjusted, the bottom pad 12 is installed on the top. 13, a height adjusting bolt 57 is screwed on the upper surface of the support column 52. The height of the height adjusting bolt is adjusted according to the rotation of the height adjusting bolt 57, Can be adjusted.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

12: bottom pad 14: height adjusting portion
16: pad fixing portion 17, 23: sleeve
18, 57: height adjusting bolt 19: height adjusting nut
20: Fixing bolt 21: Fixing nut
22: pressure plate 24, 30, 50: tension duct
26: Reinforced Duct 27: Penetration
28: Formwork for column segment 32: Concrete
34: First Column Segment 36: Concrete Foundation Formwork
38: abandoned concrete 40: support structure
42: Steel pipe duct 44: Concrete foundation
46: second column segment 48:
52: support column 54: transverse support bar
56: Circular frame

Claims (9)

As a precast concrete column construction method,
Forming a bottom pad for a match casting of the upper surface by laying and curing the concrete;
Forming a mold for a column segment with the top surface of the bottom pad as a bottom surface so as to match cast the upper surface of the bottom pad at a factory, and pouring and curing the concrete to form a column segment;
Separating the column segment from the bottom pad and transporting the bottom pad to a construction site;
A support structure for supporting the bottom pad at a construction site; installing a concrete foundation die to surround the support structure;
Lifting the bottom pad carried to the construction site over the support structure;
Casting and curing the concrete in the concrete foundation mold to form a concrete foundation.
The method according to claim 1,
The column segments are manufactured in a plurality of
The step of fabricating the column segment comprises:
Forming a mold for a column segment on the top surface of the column segment previously fabricated so as to be mass-cast with the upper surface of the column segment manufactured in the factory, and pouring and curing the concrete to manufacture another column segment Wherein the pre-cast concrete column construction method comprises the steps of:
The method according to claim 1,
A penetrating portion penetrating through the upper and lower surfaces is formed at a central portion of the bottom pad,
Wherein forming the concrete foundation comprises:
Wherein the concrete is poured into the through-hole of the bottom pad.
The method according to claim 1,
The step of forming the concrete foundation,
Transporting the column segment to a construction site;
Further comprising the step of mounting the column segment on the top surface of the bottom pad such that the top surface of the bottom pad and the bottom surface of the column segment are matched.
The method according to claim 1,
Wherein the support structure in the step of installing the concrete foundation mold comprises:
Further comprising a steel pipe duct which is bent in an arcuate shape so that one end thereof is directed to the upper end of the support structure and the other end is exposed through the side surface of the concrete foundation formwork.
6. The method of claim 5,
The bottom pad is provided with a first tensile duct communicating with one end of the steel pipe duct and passing through the top and bottom,
Wherein the column segment is formed with a second tensional duct communicating with the first tensional duct of the bottom pad and penetrating the top and bottom,
The step of forming the concrete foundation,
Transporting the column segment to a construction site;
Depositing the column segment on the top surface of the bottom pad such that the top surface of the bottom pad and the bottom surface of the column segment are matched;
Disposing a tension member in the steel tube duct, the first tensile duct and the second tensile duct;
Further comprising the step of applying a prestress to said prestressing material and fixing both ends of said prestressing material.
The method according to claim 1,
Wherein the support structure in the step of installing the concrete foundation mold comprises:
At least three supporting pillars standing upright on the ground in the construction site and extending and contracted in the vertical direction and a transverse supporting bar transversely coupled to the supporting pillars,
Wherein the step of lifting the support structure comprises:
And lifting the bottom pad to the top of the support column and leveling the bottom pad by stretching the support column to level the bottom pad.
The method according to claim 1,
Wherein the bottom pad comprises:
A height adjusting unit including a height adjusting bolt threaded through the bottom surface of the bottom pad and a height adjusting nut coupled to an end of the height adjusting bolt;
And a pad fixing unit including a fixing bolt threaded through an upper surface and a lower surface of the bottom pad, an acupressure plate through which the fixing bolt penetrates, and a fixing nut screwed into the fixing bolt. Precast Concrete Column Construction Method.
9. The method of claim 8,
Wherein the support structure in the step of installing the concrete foundation mold comprises:
A support column corresponding to the height adjusting section and the pad fixing section and disposed in a standing position on the ground in a construction site and a transverse support bar transversely coupled with the support column, Column construction method.

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