KR101753743B1 - Structure and Constructing Method of Integrated Pier-Base - Google Patents

Structure and Constructing Method of Integrated Pier-Base Download PDF

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Publication number
KR101753743B1
KR101753743B1 KR1020160023523A KR20160023523A KR101753743B1 KR 101753743 B1 KR101753743 B1 KR 101753743B1 KR 1020160023523 A KR1020160023523 A KR 1020160023523A KR 20160023523 A KR20160023523 A KR 20160023523A KR 101753743 B1 KR101753743 B1 KR 101753743B1
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South Korea
Prior art keywords
column
foundation
concrete
formwork
base
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KR1020160023523A
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Korean (ko)
Inventor
한효석
정원용
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(주)나눔시스템
정원용
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Priority to KR1020160023523A priority Critical patent/KR101753743B1/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/01Flat foundations
    • E02D27/02Flat foundations without substantial excavation
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/268Composite concrete-metal
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/0007Production methods using a mold
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0026Metals
    • E02D2300/0029Steel; Iron
    • E02D2300/0034Steel; Iron in wire form
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00Miscellaneous
    • E02D2600/20Miscellaneous comprising details of connection between elements

Abstract

In the present invention, the foundation is constructed by pouring concrete, and the pillar is constructed in succession. The pouring die is disposed so that the lower part of the pouring die is embedded in the base. The pouring die is integrated with the pillar body at the outer surface of the lower end of the pillar. At the same time, since the concrete joint between the column and the base portion is present in the buried form, excellent structural stability is secured with respect to the connection portion between the lower end portion of the column and the foundation portion, The present invention relates to a column-base integral-joint construction method using a landfill mold and a column-foundation integral assembly structure constructed thereby, which can improve installation efficiency by allowing a column form to be easily installed.

Figure R1020160023523

Description

Technical Field [0001] The present invention relates to a pillar-to-foundation integral construction method using a landfill form, and a column-

The present invention relates to a method of integrally joining a column such as a pier of a bridge and a foundation of a lower part thereof, and a structure in which the column and the foundation of the lower part are integrally joined. More specifically, The bottom of the embedding form is placed so as to be embedded in the base, wherein the embedding form is integrated with the column main body at the outer surface of the lower end of the column, and at the same time, By providing a concrete joint in the buried form, it is possible to secure excellent structural stability with respect to the connection between the lower end of the column and the foundation, and to easily install the column formwork for vertically upward and downward To improve the efficiency of construction, "the landfill The present invention relates to a column-base integral assembly method and a column-foundation integral assembly constructed thereby.

Conventionally, in the construction of columns and bases such as piers of bridges, it is common to install piles on concrete bases and concrete piles on concrete bases. FIGS. 1 to 3 are schematic perspective views sequentially illustrating a process of constructing a foundation and a column so that they are continuous according to the related art. 1, a block-shaped base 2 is manufactured by using a concrete. At this time, the vertical joining reinforcing bars 21 of the reinforcing bars for reinforcing the base portion embedded in the concrete of the base portion 2, . After the concrete curing of the foundation part 2 is completed, the column formwork 4 for the column is assembled as shown in FIG. 2 and installed on the foundation part 2. At this time, the vertical joining reinforcing bars 21 are located in the pillar mold 4. Once the column formwork 4 has been assembled, a column reinforcing steel net is disposed in the column form 4 and the column reinforcing steel net is connected to the vertical joining reinforcing bar 21. Then, as shown in FIG. 3, And the lower part of the column 1 is placed on the foundation part 2. [ Subsequently, an additional column 4 is stacked vertically, assembled, and concrete is laid repeatedly, thereby constructing a column 1 of designed height.

However, in such a conventional technique, since the column mold 4 is assembled and positioned on the upper surface of the base portion 2 in a state where the base portion 2 is completed, if the upper surface of the base portion 2 is not flat The column mold 4 is tilted so that the column 1 made by the column mold 4 does not have the designed verticalness. In order to prevent this, it is necessary to perform an operation of flattening the upper surface of the base portion 2. For example, the upper surface of the base portion 2 may be ground by a grinder or the like, It is possible to install the column formwork 4 only after securing the flatness of the upper surface of the base portion 2. [ As described above, in the prior art, an additional work such as "ensuring the flatness of the top surface 2 of the base part 2 by using a grinding operation and a plate material installation work" must be accompanied by an additional work. In grinding work, etc., much noise and dust are generated, In addition, since the work itself is cumbersome and takes a lot of cost and time, the work efficiency is lowered and the construction cost and the construction period can not be increased.

Since the column formwork 4 is simply placed on the upper surface of the foundation section 2 in order to prevent the column formwork 4 from being tilted or tilted or horizontally moved, It is necessary to provide an auxiliary supporting member 9 between the upper surfaces of the supporting members 2. Therefore, in the prior art, it is inevitably accompanied by a decrease in working efficiency, an increase in costs, and an increase in a construction period due to the installation of the auxiliary supporting member 9.

Above all, the prior art has a structural weak point that a concrete joint must exist between the foundation 2 and the bottom of the column. The column formwork (4) is made of steel so as to withstand the high pouring pressure of the concrete, and therefore the weight itself is significant. Therefore, prior to installing the column formwork 4 in the prior art, the concrete of the foundation section 2 is sufficiently cured so that the upper surface of the foundation section 2 can support the weight of the column formwork 4, (2) must be completed. The concrete for the column 1 is placed on the foundation 2 only after the upper surface of the foundation 2 is cured and the foundation 2 is completed. There is a significant difference in time of concrete pouring time between the concrete of the part 2 and a concrete joint between the foundation part 2 and the lower part of the column is inevitably a cold joint which is not integrated with each other will be. FIG. 4 is a schematic cross-sectional view showing that a concrete discontinuity J is formed between the base portion and the bottom of the column at the lower portion of the column-foundation coupling structure constructed by the above conventional technique. In FIG. 4, for the sake of convenience, the illustration of the reinforcing bars embedded in the concrete is omitted, and only the concrete is shown.

In the case of the joining structure of the column-base portion, since a large bending moment acts on the continuous portion of the column and the base portion, solid integration between the column and the base portion is very important. However, according to the prior art, there is a possibility that the concrete discontinuity surface J exists at the portion where the column and the base portion are continuous as described above, so that it is difficult to achieve complete and solid integration at the continuous portion of the column and the base portion, do.

In view of such a structural problem, in the prior arts such as Korean Patent No. 10-0830119, an additional deformed reinforcing bar is disposed between the column and the base portion, and a concrete portion protruding around the column is further provided However, in the case of this prior patent, there is still a concrete joint between the column and the base portion, so that the above-mentioned problems of the prior art can not be solved, And only the side effect which exacerbates the appearance is brought about.

Korean Patent No. 10-0830119 (2008. 05. 20. Announcement).

The present invention has been developed in order to overcome the limitations of the prior art as described above, and it is possible to easily install the mold for the column construction with the designed vertical degree when the column is continuously installed with the base after the foundation is constructed It is possible to stably form the formwork without the need of an auxiliary supporting member such as a tensile wire and to solve the structural weakness caused by the concrete discontinuity between the bottom of the column and the foundation, So that it is possible to firmly integrate the pillar-base integral assembly.

In order to accomplish the above object, according to the present invention, there is provided a method of constructing a column-foundation coupling structure in which a lower end of a column is coupled to a foundation, comprising the steps of providing a base part for making a base part, And placing it in a base part mold; Disposing a buried form consisting of a tubular member having a vertical section corresponding to a vertical cross section of the column on the foundation reinforcement assembly so that the lower end thereof can be embedded in the concrete of the foundation; The lower part of the landfill is filled in the upper part of the upper part of the landfill form so that the lower part of the landfill form is filled up with the upper part of the landfill form, Forming a base portion in a state that the base portion is formed; Installing a column mold for the installation of the column on the landfill form; A step of inserting a column reinforcing steel net in a column formwork, preparing a column by placing a secondary concrete in a vacant space and a column formwork in an embedment formwork; And a step of demolding the column form with the buried form left, whereby the lower part of the buried form is buried in the foundation, the buried form covers the lower end of the column to form a part of the column, and the base part and the lower part of the column Wherein a concrete discontinuity between the first laid concrete and the second laid concrete so as to form the main body of the column is positioned in the embedding formwork.

In the construction method of the present invention described above. At the lower end of the embedment form, a concave depression is formed at the lower edge of the embedment form upwardly; In the step of disposing the landfill on the foundation reinforcing steel assembly, the landfill mold 3 may be installed so that the horizontal reinforcing bars of the foundation reinforcing steel assembly are located in the recesses. In the landfill form, The length of the direction can be changed.

Furthermore, in the above-described construction method of the present invention, the mold support is provided on the outer surface of the embedment form so as to protrude outwardly; In the step of installing the column formwork for constructing the column on the embedment formwork, the lower end of the column formwork may be placed on the formwork support, and then the column formwork and the formwork support may be integrally assembled by the connecting plate.

In order to attain the above object, the present invention provides a method for constructing a pillar of a building, comprising the steps of: constructing a pillar of the pillar by inserting a lower part of the pillar into a base part; And a concrete discontinuity surface between the first concrete laid so as to form the base portion and the lower portion of the column and the concrete laid secondarily to form the main body of the column is located in the landfill form. A combined column-base bonded structure is provided.

According to the present invention, the concrete discontinuity between the column and the base part does not exist on the upper surface of the base part, but exists inside the buried formwork in which the lower part is embedded in the base part, And a very large bending moment resistance is exerted at the joining position of the column-base portion, so that there is an advantage that the joining state of the column-base portion is structurally very stable and rigid.

Further, in the present invention, when the column is continuously installed on the base portion, the lower end portion of the column to which a large bending moment is applied is covered by the buried formwork, thereby further increasing the bending stiffness at the column bottom portion, Therefore, there is an advantage that a more secure structure can be constructed.

In the present invention, since the vertical degree of the embedding form is adjusted according to the design before the concrete is laid, a part of the lower part of the column in the base part and the inside of the embedding formwork is integrally constructed by pouring the primary concrete, When the formwork is laminated, it is possible to easily construct the column having the designed vertical degree without adjusting the verticality of the column formwork. Therefore, the present invention does not require any additional work for securing the flatness of the upper surface of the foundation, which is required in the prior art, and thus can exert a significantly improved working efficiency over the prior art, thereby reducing the construction cost and shortening the construction period .

Further, in the present invention, since the lower end portion of the embedment die supporting the column formwork is firmly installed at a state where the lower end portion thereof is embedded in the concrete of the foundation portion, by merely firmly engaging the embedment formwork and the column formwork, It is possible to stably install the formwork vertically and accordingly it is not necessary to install the auxiliary support member for preventing the conduction, tilting, or horizontal movement of the column formwork, which is required in the prior art, Improvement of construction cost, and shortening of construction time.

FIGS. 1 to 3 are schematic perspective views sequentially illustrating a process of constructing a foundation and a column so that they are continuous according to the related art.
FIG. 4 is a schematic cross-sectional view showing that a concrete discontinuity is formed between a base portion and a bottom of a column at the bottom of a column-base attachment structure constructed by a conventional technique.
FIG. 5 and FIG. 6 are schematic perspective views showing different directions of an example of a landfill mold used in the construction method of the present invention.
7 is a schematic half cross-sectional perspective view along line AA of FIG.
8 is a schematic exploded perspective view showing a state in which a tubular embedding mold is assembled with both side members in the horizontal direction facing each other in the present invention.
9 is a schematic perspective view showing a state in which the embedding form of the present invention, in which a concave portion is formed at a lower end edge, is disposed on a horizontal reinforcing bar of a foundation reinforcing steel assembly;
10 is a schematic partial side view showing a state in which the embedding form is disposed on a horizontal reinforcing bar of a reinforcing bar assembly of a foundation part in the present invention.
11 is a schematic side view showing a state in which a buried formwork is disposed on an upper portion of a foundation reinforcing steel assembly according to the present invention.
12 is a schematic sectional view showing a state in which a primary concrete is laid up to a height of a part of a base part and a buried formwork according to the present invention.
FIG. 13 is a schematic side view showing a state in which a column form is stacked on an embedding form according to the present invention.
14 is a schematic cross-sectional view showing a state in which a secondary concrete is laid in the inside of the landfill mold and the inside of the pillar mold according to the present invention, following the state shown in Fig.
15 is a schematic cross-sectional view showing that a concrete discontinuity is formed at a position in a buried formwork after the column-foundation bonded structure is constructed by the construction method of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

In the pillar-to-foundation integrally bonded construction method according to the present invention, the concrete for the foundation is placed so that the lower end of the buried formwork is embedded in the concrete at the time of constructing the foundation, so that the buried formwork is fixedly disposed on the upper surface of the foundation The base portion is produced.

FIGS. 5 and 6 are schematic perspective views showing different views of an example of the landfill mold 3 used in the construction method of the present invention. Fig. 7 is a schematic half cross-sectional perspective view taken along the line AA in Fig. 5, and Fig. 8 is a schematic exploded perspective view showing a state in which a tubular embedding mold 3 is assembled with both side members in the horizontal direction facing each other Are shown.

5 to 8, the embedding mold 3 is formed of a tubular member having a vertical cross section corresponding to the vertical cross-sectional shape of the column 1 to be installed, A mold support 31 for allowing the column formwork 4 for the column to be placed on the embedment form 3 is stacked on the outer surface thereof so as to protrude outward. In the embodiment illustrated in the figures, the form supports 31 are comprised of a vertical plate member and are provided at a plurality of intervals along the circumference at the top of the embedding form 3. The mold support 31 has a function of supporting the column mold 4 as described later. In addition, the mold support 4 and the buried form 3 can be integrally combined. This will be described later.

On the other hand, a reinforced embedding material 30 for structural reinforcement and integration with concrete may be provided on the inner surface of the embedding form 3. In the embodiment illustrated in the drawings, the reinforced embedding member 30 is integrally attached by a method such as welding in a state of being formed of a plate member and vertically arranged and protruding from the inner surface of the embedding formwork 3. [ A through hole 32 may be formed in the reinforced buried material 30 in order to allow the concrete to pass through the reinforced buried material 30 formed of the plate member to further strengthen the integration with the concrete.

The landfill mold 3 may be made of a single tubular member, such as a steel pipe, but may have a construction that is assembled in the horizontal direction. In the case where the embedding form 3 is assembled in the horizontal direction as described above, when the reinforced embedding material 30 is made of a plate member, the horizontal two side members constituting the embedding form 3 face each other, The reinforcing embedding member 30 of the plate member is brought into contact with each other so that the fastening member such as a bolt is inserted through the reinforcing filler 30 so as to easily face the both side members in the horizontal direction The cylindrical buried formwork 3 can be assembled and manufactured. Of course, when the plate-shaped coupling flange is provided in the landfill mold 3 separately from the reinforced filler 30 so that the coupling flanges are brought into contact with each other when the both side members in the horizontal direction are made to face each other, So as to be combined. Although not shown in the drawing, the embedding form 3 may have a structure in which a plurality of divided parts in the vertical direction are laminated.

On the other hand, the reinforced embedding material 30 may be a plate member, and may be a bent plate member as illustrated in the drawing. The reinforced embedding material 30 may be provided over the entire vertical height of the embedding form 3, but may be provided only at a part of the vertical height. Further, such reinforced embedding material 30 may be omitted.

A vertical support rod 33 may be assembled to the landfill 3 for height and level adjustment of the landfill 3. For this purpose, the landfill mold 3 is provided with a supporting rod mounting member 34 coupled with the vertical supporting rod 33. The supporting bar mounting member 34 is integrally attached to the inner surface of the embedding mold 3. A plurality of support bar attachment members 34 may be provided at intervals along the inner circumferential surface of the embedding mold 3 so that the vertical support rods 33 are provided so that the vertical support rods 33 can be easily arranged in the vertical direction A plurality of support bar mounting members 34 may be provided in the vertical direction so as to be extended. The supporting rod mounting member 34 to which the vertical supporting rod 33 is coupled may be a ring type member through which the end portion of the vertical supporting rod 33 can be passed or a nut member through which the upper end of the vertical supporting rod 33 can be screwed, And in the embodiment illustrated in the drawings, the supporting bar mounting member 34 is located at the bending edge of the bent reinforced embedding member 30. [

The vertical support rods 33 are vertically arranged with the upper ends of the vertical support rods 33 engaged with the support rod mounting members 34 so that the vertical support rods 33 support the embedding molds 3, And can be disposed at a designed position while maintaining the required level of horizontalness. Particularly, when the vertical support rods 33 are assembled in the embedding mold 3 such that the length of the vertical support rods 33 is changed, the length of the vertical support rods 33 extending downward can be adjusted so that the embedding molds 3 ) To the required horizontal level. It is very easy to adjust the extension length of the vertical support bar 33 when the support bar mounting member 34 is made of a nut member and the vertical support bar 33 is screwed to the support bar mounting member 34 .

In the lower end of the landfill 3 according to the present invention, a concave portion 36 may be formed at the lower edge of the landfill 3 in an upwardly concave manner. As described above, the bottom of the buried formwork 3 is embedded in the concrete of the foundation 2. A reinforcing assembly for reinforcement (base reinforcing steel reinforcing assembly) is embedded in the concrete in the base portion 2. The reinforcing steel assembly for reinforcing the base portion is provided with horizontal reinforcing bars. Therefore, when installing the landfill 3, the landfill 3 must be positioned above the horizontal reinforcing bars of the reinforcing steel assembly for the foundation. When the bottom end edge of the embedding form 3 is directly placed on the horizontal reinforcement of the foundation reinforcement assembly when the embedding form 3 is placed on the horizontal reinforcement of the foundation reinforcement reinforcement assembly 3, The depth at which the bottom is embedded in the concrete of the foundation 2 is ultimately limited to the thickness of the covering of the horizontal reinforcing bars constituting the foundation reinforcing steel assembly. That is, the lower portion of the embedding form 3 is embedded in the concrete of the foundation 2 only by the coating thickness of the horizontal reinforcement. If the covering thickness of the horizontal reinforcement is small, the concrete embedment depth of the embedding form 3 3) is embedded in the concrete of the foundation 2) is also reduced. By forming the recess 36 in the present invention, an advantageous effect of further increasing the depth of concrete embedding of the embedding form 3 is exhibited.

9 shows a schematic perspective view showing a state in which the embedding mold 3 having the concave portion 36 formed at the lower end edge thereof is disposed on the horizontal reinforcing bar 25 of the reinforcing bar assembly 28 for the foundation portion. When the embedding mold 3 is disposed on the horizontal reinforcing bar 25 of the foundation reinforcing steel assembly, when the horizontal reinforcing bars 25 are concave So that the concrete buried depth of the landfill 3 is increased.

10A and 10B show an embodiment in which the recessed portion 36 is not provided in the embedding form 3 and the embodiment in which the recessed portion 36 is present in the embedment mold 3 in the horizontal reinforcing bars 28 Is shown on the top surface (25).

10 (a), in the absence of the recess 36, the lower end edge of the landfill mold 3 is directly placed on the horizontal reinforcing bar 25, as described above, The concrete embedment depth must be less than the covering thickness H1 of the horizontal reinforcing bars 25. [ 10 (b), however, the horizontal reinforcing bars 25 are located in the recesses 36 so that the position of the embedding molds 3 is further lowered So that the concrete embedment depth H2 of the embedding form 3 becomes larger than the concrete embedment depth H1 in the case shown in FIG. 10 (a). The fact that the depth of concrete buried in the landfill 3 is increased means that the bonding and integration between the landfill 3 and the foundation 2 becomes more robust. Of course, the concave portion 36 may be omitted if the thickness of the covering of the horizontal reinforcing bars 25 is considerably large and the depth of concrete filling of the filler mold 3 of a sufficient size is secured.

In order to make the bottom part of the embedding form 3 according to the present invention more firmly engaged and integrated between the embedding form 3 and the foundation part 2 when the lower end part of the embedding form 3 according to the present invention is embedded in the concrete of the foundation part 2, The through hole 35 through which the concrete of the concrete structure can pass can be formed through the lower end of the landfill 3.

Hereinafter, concrete method steps of the column-foundation integral assembly method according to the present invention using the above-mentioned embedding form 3 will be described.

 Fig. 11 is a schematic side view showing a state in which the landfill 3 is disposed on the base reinforcing steel reinforcing assembly 28. Fig. In FIG. 11, the foundation reinforcing steel assembly 28 shows only a part necessary for the description of the present invention, and the base mold is omitted.

First, the base part formwork for the manufacture of the base part 2 is provided, and the base part reinforcing steel assembly 28 is manufactured and placed in the base part formwork. Subsequently, the above-described landfill mold 3 is placed on top of the foundation reinforcing steel assembly 28. At this time, the length of the vertical support rods 33 is adjusted to adjust the verticality of the buried formwork 3, thereby matching the design verticalness of the column to be constructed. 11, the vertical joining reinforcing bar 21 to be connected to the column reinforcing steel net 40 in the foundation reinforcing steel reinforcing assembly 28 is located in the embedding mold 3, as in the prior art.

When the installation of the embedding mold 3 is completed, the foundation 2 is produced by pouring concrete into the base part mold. 12 shows a state in which a primary concrete is laid up to a predetermined height in the inside of the base part formwork and the inside of the buried formwork 3 to form a part of the base part 2 and a lower part of the column A schematic cross section is shown.

In the prior art, since the column mold 4 must be placed on the upper surface of the foundation 2, the installation of the column mold 4 proceeds only after the concrete of the foundation 2 is sufficiently cured and cured, The concrete is placed in the inside of the landfill form 3 in a state before the external exposed surface of the concrete still laid is cured and then the concrete is laid continuously in the inside of the landfill form 3 . That is, in order to make the shape of the base part 2, concrete is poured into the base part form, and after about 20 to 30 minutes has elapsed, the concrete is continuously poured into the inside of the buried form 3 as well. At this time, the concrete is not filled in the filling mold 3 over the entire vertical height of the filling mold 3 but the height of the filling mold 3 is higher than the vertical height (the height from the upper surface of the base portion to the uppermost end of the filling mold) Only up to a small height, the concrete is filled into the landfill mold 3. That is, the concrete is filled up to a position higher than the upper surface of the foundation part in the landfill form 3, and the concrete is filled up to a position lower than the uppermost part of the landfill formwork 3. When the concrete is filled in the embedding mold 3, the vertical joining reinforcing bar 21 should be in a state in which the upper end thereof protrudes from the upper surface of the concrete in the embedding mold 3. This is to combine with the column reinforcing steel net.

As described above, in the present invention, concrete is filled in the filling mold 3 at a predetermined height before the externally exposed surface of the concrete for the foundation 2 is cured, and the concrete filled in the filling mold 3 finally reaches the pillar The concrete of the foundation part 2 and the concrete of the lower end of the column 1 are integrally continuous and the base part 2 and the lower end part of the column 1 are integrally formed as a single member It is produced.

Subsequently, the column formwork (4) for constructing the column (1) is assembled on the landform formwork (3) and stacked. 13 is a schematic side view showing a state in which the column formwork 4 is stacked on the landform form 3. The pillar formwork 4 is placed on the formwork support 31 and assembled with the embedding formwork 3 in one piece. That is, the lower end of the column die 4 is placed on the die support 31. At this time, in order to firmly assemble the column formwork 4 and the embedding formwork 3, for example, a connecting plate is arranged over the column formwork 4 and the formwork support 31 The connection plate and the form support 31 may be bolted together and the connection plate may be bolted to the column form 4.

After the column formwork 4 is assembled and stacked on the embedding form 3, the column reinforced reinforcing net 40 is inserted into the column formwork 4 and the column reinforced reinforcing net 40 and the vertically- A secondary concrete 42 is laid in the column form 4 and the column form 1 is manufactured by disassembling the column form 4 after the concrete is cured. Fig. 14 is a schematic cross-sectional view showing a state in which a secondary concrete 42 is laid in the inside of the buried formwork 3 and inside the pillar form 4, following the state shown in Fig. The column 1 having the designed height can be manufactured by repeating the installation of the column formwork 4, the insertion of the concrete, and the disassembly of the column formwork 4, if necessary.

In the prior art, a concrete discontinuity due to a time interval between a concrete pouring time of the base part and a concrete pouring time of the pillar is formed on the upper surface of the base part 2. According to the construction method of the present invention, (3).

15 is a schematic cross-sectional view showing that a concrete discontinuity J is formed at a position in the landfill 3 by the construction of the column 1-foundation 2 joint structure by the construction method of the present invention. In FIG. 15, for the sake of convenience, the illustration of the reinforcing bars embedded in the concrete is omitted, and only the concrete is shown.

In the present invention, since the concrete is poured to a predetermined height in the landfill mold 3 in succession to the concrete pouring of the foundation part 2, the concrete which is primarily installed for the construction of the foundation part exists only up to the upper surface height of the foundation part But is present within the landfill form 3 to a predetermined height. When the secondary concrete for the column is poured in this state, the secondary concrete is filled in the empty space above the height of the primary concrete filled in the landfill form 3, and the concrete is filled in the column formwork 4. Therefore, a concrete discontinuity (hereinafter referred to as " concrete discontinuity ") that is generated due to a difference in the time of concrete placement between the primary formwork and the primary concrete filled in the embedding formwork 3, and between the vacant portion of the embedding formwork and the secondary concrete filled in the column formwork J are located in the landfill 3. That is, according to the present invention, the concrete discontinuity J between the concrete poured to form the base portion and the lower end portion of the pillar and the concrete poured to form the main body of the pillar is located in the landform form 3.

Since the lower end of the landfill 3 is embedded in the concrete of the foundation 2, the landfill 3 can not be removed afterwards and the landfill 3 is permanently connected to the foundation 2 And a concrete discontinuity surface between the foundation and the column is located in the embedding form 3 that forms the lower end of the column 1 permanently. Therefore, in contrast to the prior art, in the present invention, there is no concrete discontinuity between the column and the base portion on the upper surface of the base portion, so that the column and base portion can be integrated completely and firmly, A very large bending moment resistance is exerted, so that it can be structurally very stable. Particularly, a concrete discontinuity surface which is inevitably generated due to the time interval of the concrete pavement is formed in the state of being constrained by the embedding formwork 3 in the interior of the embedding formwork 3, which is a part of the lower end of the pillar 1, The structural weakness due to the existence of such a concrete discontinuity can be minimized.

Particularly, since the lower end of the column 1 to which a large bending moment is applied is covered by the buried formwork 3, the buried formwork 3 forms a part of the column 1, The bending stiffness at the lower end portion is further increased, and it becomes possible to construct the column 1 more structurally safe.

In the present invention, when the buried formwork (3) is installed in the state before the concrete for the foundation (2) is still laid, the vertical degree of the buried formwork (3) is adjusted according to the design. The vertical posture of the column formwork 4 is additionally adjusted when the column formwork 4 is stacked on the embedment formwork 3 after a part of the lower end of the column 1 is integrally installed in the embedding formwork 2 and the embedment formwork 3 It is possible to easily construct the column 1 having the designed vertical degree without having to perform the above operation. Therefore, in the present invention, there is no need for additional work for securing the flatness of the upper surface of the base part 2, which is required in the prior art, and thus it is possible to exert a work efficiency much higher than that of the prior art, The advantage of shortening is exhibited.

In the present invention, since the bottom end portion of the embedding form 3 supporting the column form 4 is firmly installed at a state where it is embedded in the concrete of the foundation 2, the embedding form 3 and the column It is possible to stably install the column formwork 4 in a stable manner by merely rigidly coupling the formwork 4 to each other so that the column formwork 4 which is required in the prior art is prevented from being tilted, It is unnecessary to install the auxiliary support member 9 for preventing the occurrence of the problem, thereby further improving the working efficiency, reducing the construction cost, and shortening the construction period.

1: Column
2: Foundation
3: Landfill mold
4: Column form
21: vertical joining reinforcing bar
25: horizontal reinforcement
28: Reinforcement assembly for foundation part
30: reinforced landfill
31: die support
32: Through hole
33: vertical support bar
34:
35: Through ball
36:
40: Column Reinforcing Net

Claims (5)

A method of constructing a column-foundation coupling structure in which a lower end of a column is coupled to a foundation,
Providing a base part formwork for making the base part (2), fabricating the base part reinforcing steel assembly (28) and placing it in the base part formwork;
A method of manufacturing a foundation (2), the method comprising the steps of: placing a buried formwork (3) made of a tubular member having a vertical cross section corresponding to a vertical cross section of the column (1) Placing on the reinforcement reinforcement assembly (28);
The base part 2 is formed by pouring the primary concrete in the base part mold so that the base part reinforcing steel assembly 28 is embedded in the primary concrete. In addition, the inside of the buried form 3 is higher than the upper surface of the foundation part Making the foundation 2 so that the lower end of the buried formwork 3 is embedded in the upper part of the foundation 2 by allowing the concrete to be filled up to a position lower than the uppermost end of the buried formwork 3;
Installing a column mold (4) for installation of the column (1) on the landfill (3);
The column reinforcing net 40 is inserted in the column mold 4 and before the external exposed surface of the primary concrete which has been filled in the landfill 3 to a position higher than the upper surface of the foundation 2 is hardened, Preparing a column 1 by pouring a secondary concrete into the empty space in the landfill mold 3 and the column mold 4; And
By including the step of demolding the column form 4 while leaving the buried form 3,
The lower part of the buried form 3 is buried in the foundation 2 and the buried form 3 covers the lower end of the column 1 to form a part of the column 1. The foundation 2 and the columns 1 Is composed of a single member integrated with the primary concrete constituting the foundation part 2 and the lower end of the concrete inconsistency plane formed between the primary concrete and the secondary concrete constituting the main body of the column 1 J are present in the landfill mold 3 at a higher position than the top surface of the foundation 2;
And the pillar (1) is made to be a member constituting the lower end of the column (1) by being permanently retained in a state of being engaged with the foundation (2) without removing the buried formwork Construction method.
The method according to claim 1,
At the lower end of the landfill form 3, a recess 36 is formed at the lower edge of the landfill 3 so as to be concave upwardly;
In the step of disposing the landfill 3 on the foundation reinforcing steel assembly 28, the landfill 3 is placed so that the horizontal reinforcing bars 25 of the foundation reinforcing steel assembly 28 are located in the recesses 36, Wherein the step of installing the column-base integral fastening structure comprises the steps of:
3. The method according to claim 1 or 2,
A method of constructing a column-foundation integral joint structure, characterized in that a vertical support rod (33) is provided in the landform form (3) so that the length of the vertical support rod (33) changes in the vertical direction.
3. The method according to claim 1 or 2,
On the outer surface of the embedding form 3, a form support 31 is provided so as to protrude outwardly;
In the step of installing the column formwork 4 for the construction of the column 1 on the embedment formwork 3, the lower end of the column formwork 4 is placed on the formwork support 31 and then the column formwork 4 and the formwork support 4, (31) are integrally assembled by a connecting plate.
A column-base bonded structure having a base portion and a lower end portion joined to each other,
Providing a base part formwork for making the base part (2), fabricating the base part reinforcing steel assembly (28) and placing it in the base part formwork; A method of manufacturing a foundation (2), the method comprising the steps of: placing a buried formwork (3) made of a tubular member having a vertical cross section corresponding to a vertical cross section of the column (1) Placing on the reinforcement reinforcement assembly (28); The base part 2 is formed by pouring the primary concrete in the base part mold so that the base part reinforcing steel assembly 28 is embedded in the primary concrete. In addition, the inside of the buried form 3 is higher than the upper surface of the foundation part Making the foundation 2 so that the lower end of the buried formwork 3 is embedded in the upper part of the foundation 2 by allowing the concrete to be filled up to a position lower than the uppermost end of the buried formwork 3; Installing a column mold (4) for installation of the column (1) on the landfill (3); And the column reinforcing net 40 is inserted in the column form 4 and the external exposed surface of the primary concrete which has been filled in the filling form 3 to a position higher than the upper face of the foundation 2 A step of pouring the secondary concrete into the empty space in the landfill mold 3 and the pillar mold 4 to form the pillar 1; And demolding the column form (4), leaving the fill form (3) left behind;
The lower part of the buried form 3 is buried in the foundation 2 and the buried form 3 covers the lower end of the column 1 to form a part of the column 1. The foundation 2 and the columns 1 Is composed of a single member integrated with the primary concrete constituting the foundation part 2 and the lower end of the concrete inconsistency plane formed between the primary concrete and the secondary concrete constituting the main body of the column 1 J are present in the landfill mold 3 at a higher position than the top surface of the foundation 2;
Characterized in that the buried formwork (3) is permanently retained in a state of being engaged with the foundation (2) without being removed, and is a member constituting the lower end of the column (1) Negative integral structure.
KR1020160023523A 2016-02-26 2016-02-26 Structure and Constructing Method of Integrated Pier-Base KR101753743B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102034760B1 (en) * 2018-12-31 2019-10-22 지앤에스건설 주식회사 Construction method of Sing column drilled pier foundation introduced the tension system and Pile structure-GNS Pile Method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006328666A (en) * 2005-05-23 2006-12-07 Okumura Corp Construction method for integrating pile with column

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006328666A (en) * 2005-05-23 2006-12-07 Okumura Corp Construction method for integrating pile with column

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102034760B1 (en) * 2018-12-31 2019-10-22 지앤에스건설 주식회사 Construction method of Sing column drilled pier foundation introduced the tension system and Pile structure-GNS Pile Method

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