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KR101430518B1 - Seismic reinforcement Concrete pile using fiber reinforcement - Google Patents

Seismic reinforcement Concrete pile using fiber reinforcement Download PDF

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Publication number
KR101430518B1
KR101430518B1 KR1020140020478A KR20140020478A KR101430518B1 KR 101430518 B1 KR101430518 B1 KR 101430518B1 KR 1020140020478 A KR1020140020478 A KR 1020140020478A KR 20140020478 A KR20140020478 A KR 20140020478A KR 101430518 B1 KR101430518 B1 KR 101430518B1
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South Korea
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fiber
fiber reinforcing
reinforcing material
pile
concrete
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KR1020140020478A
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Korean (ko)
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박연수
박주원
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박연수
주식회사 서림
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Priority to KR1020140020478A priority Critical patent/KR101430518B1/en
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Publication of KR101430518B1 publication Critical patent/KR101430518B1/en
Priority to PCT/KR2015/001729 priority patent/WO2015126215A1/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/012—Discrete reinforcing elements, e.g. fibres
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0051—Including fibers
    • E02D2300/0053—Including fibers made from glass
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0051—Including fibers
    • E02D2300/0068—Including fibers made from carbon

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The present invention is to provide a concrete pile using a fiber reinforcing material which includes multiple main reinforcing bars formed at predetermined intervals in the longitudinal direction; a mesh type fiber reinforcing material which circularly surrounds the main reinforcing bars; and a hollow tubular concrete having a predetermined thickness which includes the main reinforcing bars and the fiber reinforcing material, wherein both ends of the fiber reinforcing material are overlapped with one another to form a lap joint to be fixed to the main reinforcing bars, and the upper end of the fiber reinforcing material and the lower end of the fiber reinforcing material are also overlapped with the lower end of the fiber reinforcing material and the upper end of the fiber reinforcing material to form lap joints to be fixed to the main reinforcing bars. Among the fiber reinforcing materials, a transverse fiber grid replaces an existing tie hoop, and a longitudinal fiber grid replaces an existing reinforcing bar. Also, bond strength is improved, and vertical force, horizontal force, and bending moment resistance are remarkably improved due to an integrated structure of the fiber reinforcing material and the concrete, so that the concrete pile using a fiber reinforcing material can be used as a substitute for a PHC pile, a steel pipe pile, and a composite pile.

Description

섬유보강재를 이용한 에스알 콘크리트말뚝{Seismic reinforcement Concrete pile using fiber reinforcement}Technical Field [0001] The present invention relates to an artificial concrete pile using fiber reinforcing material,

본 발명은 섬유보강재를 이용한 에스알 콘크리트말뚝에 관한 것으로, 더욱 상세하게는 주철근과 상기 주철근을 감싸도록 형성된 격자망 형태의 섬유보강재로 구성된 에스알 콘크리트말뚝을 제공하되, 상기 섬유보강재 중 횡방향의 섬유그리드는 기존의 띠철근, 종방향의 섬유그리드는 기존의 보강철근을 대체할 뿐더러 상기 섬유보강재와 콘크리트의 일체식 구조로 부착강도 증진과 함께 수직력과 수평력 및 휨모멘트에 대한 저항능력이 크게 향상되어 PHC콘크리트말뚝, 강관말뚝, 복합말뚝의 대용으로 사용가능토록 하는 섬유보강재를 이용한 에스알 콘크리트말뚝에 관한 것이다.
The present invention relates to an ash concrete pile using a fiber reinforcing material, and more particularly, to an ash concrete pile composed of a fiber reinforcing material in the form of a lattice net formed to enclose a cast iron muscle and the cast iron muscle, The existing fiber reinforcing bars and longitudinal fiber grids replace the conventional reinforcing bars and the integrated structure of the fiber reinforcing material and concrete improves the adhesion strength and the resistance to the vertical force and the horizontal force and the bending moment is greatly improved, The present invention relates to an ash concrete pile using a fiber reinforcing material that can be used as a substitute for a concrete pile, a steel pipe pile, or a composite pile.

일반적으로 깊은 기초 등을 시공할 때 사용되는 말뚝에는 수직력과 수평력, 그리고 큰 휨모멘트가 작용하게 된다.Generally, vertical and horizontal forces and large bending moments are applied to piles used for deep foundation.

종래에는 말뚝으로서 콘크리트를 이용하여 중공을 가지도록 제작하여 말뚝길이 방향으로 프리스트레스를 도입한 중공 프리스트레스트 콘크리트 말뚝("PHC말뚝")이나, 강재를 원형으로 성형한 강관말뚝이 주로 이용되었다.Conventionally, hollow prestressed concrete piles ("PHC piles"), which have been made to have hollows by using concrete as a pile and introduced with a prestress in the longitudinal direction of the pile, and steel pipe piles formed by molding a steel round are mainly used.

이러한 강관말뚝은 재료 특성상 연성이 뛰어나기 때문에 수평력과 휨모멘트가 지배되는 토목 구조물에 사용되고 있는데, 상기 강관말뚝의 두께가 얇기 때문에 수직력에 대한 지지 성능이 상대적으로 낮다는 단점이 있다.These steel pipe piles are used in civil engineering structures in which horizontal force and bending moment are dominant because of their excellent ductility due to their material properties. The steel pipe piles have a disadvantage in that the support performance against the normal force is relatively low because the steel pipe piles are thin.

반면, PHC말뚝은 콘크리트를 이용하여 제작되기 때문에 일정 정도의 두께를 가지고 있고, 그에 따라 수직력에 대한 지지 성능이 강관말뚝보다 우수하기 때문에 수직력이 지배적인 건축구조물에 주로 사용되고 있다.On the other hand, since the PHC pile is manufactured using concrete, it has a certain thickness, and thus the support performance against the vertical force is superior to that of the steel pipe pile. Therefore, the PHC pile is mainly used for the vertical structure.

그러나 상기 PHC말뚝의 경우, 강관말뚝에 비해 수평력과 휨모멘트에 대한 저항능력이 상대적으로 낮다는 단점이 있다.However, in the case of the PHC pile, there is a disadvantage that the ability to withstand the horizontal force and the bending moment is relatively low as compared with the steel pipe pile.

따라서 종래에는 상기와 같은 문제점을 해결하기 위해, 수평력 및 휨모멘트에 대한 저항능력이 우수한 강관말뚝은 상부에, 수직력에 대한 저항능력이 우수한 PHC말뚝은 하부에 위치하도록 합성한 복합말뚝을 사용하거나 또는 기존의 PHC말뚝의 수평력 및 휨모멘트에 대한 저항능력을 개선하기 위해 주철근과 상기 주철근을 감싸는 띠철근 외에 다양한 형태의 보강철근을 추가로 배치한 PHC말뚝을 제작하여 사용하고 있는 실정이다.Therefore, in order to solve the above-mentioned problems, a composite pile synthesized such that a steel pipe pile having excellent resistance to horizontal force and bending moment is located at the upper portion and a PHC pile having excellent resistance to vertical force is located at the lower portion, or In order to improve the resistance to horizontal and bending moments of conventional PHC piles, PHC piles having various types of reinforcing bars in addition to the steel bars surrounding the cast iron and the steel bars have been manufactured and used.

그러나 상기 전자의 복합말뚝은 강관말뚝과 PHC말뚝을 연결하기 위한 별도의 구성이 필요하고, 후자의 PHC말뚝은 별도의 보강철근이 필요할 뿐더러 상기 보강철근과 함께 띠철근을 고정하기 위한 용접작업이 선행되어야 하는 번거로움과 불편함이 있었다.However, the former composite pile requires a separate structure for connecting the steel pipe pile and the PHC pile, and the latter PHC pile requires a separate reinforcing steel, and the welding operation for fixing the steel band together with the reinforcing steel There was a hassle and an inconvenience.

또한, 상기 후자의 PHC말뚝은 주철근의 외부에 배치되는 띠철근과 보강철근의 직경이 상당한 두께를 가지므로 피복두께로부터 자유롭지 못하며, 이로 인해 상기 띠철근과 보강철근의 부식 및 구조물의 성능저하 등의 문제점이 있었다.The latter PHC pile is not free from the coating thickness because the diameter of the reinforcing bars and the thickness of the reinforcing bars disposed outside the reinforcing steel rods are considerably thick. As a result, corrosion of the reinforcing bars, There was a problem.

즉 부적절한 피복두께로 부착강도가 저하되고 이로 인해 콘크리트말뚝에 균일이 발생하는 문제점이 있었다.
That is, there is a problem in that the adhesion strength is reduced due to improper coating thickness and uniformity is generated in the concrete pile.

따라서 본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 주철근과 상기 주철근을 감싸도록 형성된 격자망 형태의 섬유보강재로 구성된 에스알 콘크리트말뚝을 제공하되, 상기 섬유보강재 중 횡방향의 섬유그리드는 기존의 띠철근, 종방향의 섬유그리드는 기존의 보강철근을 대체할 뿐더러 상기 섬유보강재와 콘크리트의 일체식 구조로 부착강도 증진과 함께 수직력과 수평력 및 휨모멘트에 대한 저항능력이 크게 향상되어 PHC말뚝, 강관말뚝, 복합말뚝의 대용으로 사용가능토록 하는 섬유보강재를 이용한 에스알 콘크리트말뚝을 제공하는 데 그 목적이 있다.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an ash concrete pile composed of a fibrous reinforcing material in the form of a lattice net, The fiber grid in the longitudinal direction replaces the existing reinforcing bars and the integrated structure of the fiber reinforcing material and the concrete greatly improves the adhesion strength and the resistance to the vertical force and the horizontal force and the bending moment is greatly improved. Thus, the PHC pile, And to provide an ash concrete pile using a fiber reinforcing material which can be used as a substitute for a composite pile.

상기한 목적을 달성하기 위한 본 발명에 따른 섬유보강재를 이용한 에스알 콘크리트말뚝은, 종방향으로 일정간격 형성된 다수의 주철근; 상기 주철근을 원형으로 감싸는 격자망 형태의 섬유보강재; 상기 주철근과 섬유보강재를 포함하는 소정두께의 중공관 형태의 콘크리트;로 구성되되, 상기 섬유보강재의 양단부는 겹이음이 되도록 겹쳐서 주철근에 고정되고, 상기 섬유보강재의 상단부와 하단부도 상하에 배치된 섬유보강재의 하단부와 상단부에 겹이음이 되도록 겹쳐서 주철근에 고정되도록 구성되는 것을 특징으로 한다.In order to accomplish the above object, the present invention provides an ash concrete pile using fiber reinforcing material, comprising: a plurality of cast iron rods formed at regular intervals in the longitudinal direction; A lattice network type fiber reinforcing material surrounding the cast iron in a circular shape; Wherein the fiber reinforcing material is composed of a hollow tube type concrete having a predetermined thickness including the cast iron and the fiber reinforcing material, wherein both ends of the fiber reinforcing material are overlapped and fixed to the cast iron so as to form a folded joint, and the upper and lower ends of the fiber reinforcing material And is fixed to the cast iron rope so as to overlap the lower end portion and the upper end portion of the reinforcement.

또한, 상기 섬유보강재는 횡방향의 섬유그리드와 종방향의 섬유그리드로 구성되되, 상기 횡방향의 섬유그리드의 간격은 25~75㎜, 상기 종방향의 섬유그리드의 간격은 40~100㎜로 형성되고, 상기 섬유그리드의 폭은 5~10㎜로 형성되도록 구성되는 것을 특징으로 한다.In addition, the fiber reinforcing member is composed of a fiber grid in the transverse direction and a fiber grid in the longitudinal direction, wherein the interval of the fiber grid in the transverse direction is 25 to 75 mm, and the interval of the fiber grid in the longitudinal direction is 40 to 100 mm And the width of the fiber grid is 5 to 10 mm.

또한, 상기 섬유보강재의 양단부는 종방향으로 100㎜ 이상 겹이음, 상하단부는 횡방향으로 300㎜ 이상 겹이음이 되도록 구성되는 것을 특징으로 한다.In addition, both end portions of the fiber reinforcing member are formed so as to be overlapped by 100 mm or more in the longitudinal direction and the upper and lower end portions are overlapped by 300 mm or more in the transverse direction.

또한, 상기 횡방향의 섬유그리드는 탄성섬유로 배치되고, 상기 종방향의 섬유그리드는 유리섬유로 배치되도록 구성되는 것을 특징으로 한다.
Further, the transverse fiber grids are arranged as elastic fibers, and the longitudinal fiber grids are arranged as glass fibers.

이처럼 본 발명은 주철근과 상기 주철근을 감싸도록 형성된 격자망 형태의 섬유보강재로 구성된 에스알 콘크리트말뚝을 제공하되, 상기 섬유보강재 중 횡방향의 섬유그리드는 기존의 띠철근, 종방향의 섬유그리드는 기존의 보강철근을 대체할 뿐더러 상기 섬유보강재와 콘크리트의 일체식 구조로 부착강도 증진과 함께 수직력과 수평력 및 휨모멘트에 대한 저항능력이 크게 향상되어 PHC말뚝, 강관말뚝, 복합말뚝의 대용으로 사용가능토록 하고; 수평력 향상을 위해 불필요한 보강철근의 사용을 자제하고 주철근에 상기 보강철근과 함께 띠철근의 용접작업이 생략되므로 제작이 용이할 뿐더러 경제성이 크게 향상되며; 상기 띠철근과 보강철근의 대용으로 섬유보강재를 사용함에 따라 주철근만 피복두께를 만족하면 되므로 철근 부식, 구조물의 성능저하 등의 문제점을 해결할 수 있도록 하는 매우 유용한 발명인 것이다.
As described above, the present invention provides an ash concrete pile composed of a fiber reinforcing member in the form of a lattice net formed to surround a cast iron root and the cast iron, wherein the fiber grid in the transverse direction of the fiber reinforcing member is a conventional band reinforcing member, In addition to replacing the reinforcing bars, the fiber reinforcing material and the concrete are integrated with each other to improve the adhesion strength, and the resistance against the vertical force and the horizontal force and the bending moment are greatly improved, so that they can be used as substitutes for PHC piles, steel pipe piles and composite piles ; Since the use of unnecessary reinforcing bars is avoided in order to improve the horizontal force and the welding work of the reinforcing bars is omitted along with the reinforcing bars in the cast steel bars, the production is facilitated and the economical efficiency is greatly improved; The use of a fiber reinforcing material as a substitute for the band reinforcing bar and the reinforcing bar is an extremely useful invention for solving the problems of corrosion of the reinforcing steel and deterioration of the performance of the structure.

도 1 - 종래 콘크리트말뚝의 주철근과 띠철근을 도시한 사시도.
도 2 - 본 발명 에스알 콘크리트말뚝의 주철근과 섬유보강재를 도시한 사시도.
도 3 - 도 2의 섬유보강재를 도시한 전개도.
도 4 - 본 발명 에스알 콘크리트말뚝을 도시한 단면도.Fig. 1 is a perspective view showing a cast iron bar and a belt bar of a conventional concrete pile.
FIG. 2 is a perspective view showing a cast iron muscle and a fiber reinforcing material of the present invention concrete pile. FIG.
Figure 3 is a developed view of the fiber reinforcement of Figure 2;
FIG. 4 is a cross-sectional view showing the present invention concrete pile. FIG.

상기한 목적 및 효과를 달성하기 위한 본 발명을 바람직한 실시예를 통해 더욱 상세히 설명하면 다음과 같다.
The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

본 발명에 따른 섬유보강재를 이용한 에스알 콘크리트말뚝(100)은, 종방향으로 일정간격 형성된 다수의 주철근(110); 상기 주철근(110)을 원형으로 감싸는 격자망 형태의 섬유보강재(120); 상기 주철근(110)과 섬유보강재(120)를 포함하는 소정두께의 중공관 형태의 콘크리트(130);로 구성되되, 상기 섬유보강재(120)의 양단부는 겹이음이 되도록 겹쳐서 주철근(110)에 고정되고, 상기 섬유보강재(120)의 상단부와 하단부도 상하에 배치된 섬유보강재(120)의 하단부와 상단부에 겹이음이 되도록 겹쳐서 주철근(110)에 고정되도록 구성된다.
The concrete pile (100) using the fiber reinforcing material according to the present invention comprises a plurality of cast iron rods (110) formed at regular intervals in the longitudinal direction; A lattice network type fiber reinforcing member 120 surrounding the cast iron rope 110 in a circular shape; The fiber reinforcing member 120 is composed of a hollow tube type concrete 130 having a predetermined thickness and including the cast steel rope 110 and the fiber reinforcing member 120. Both end portions of the fiber reinforcing member 120 are superposed and fixed to the cast iron rope 110 The upper and lower ends of the fiber reinforcing member 120 are also stacked on the lower end and upper end of the fiber reinforcing member 120 disposed on the upper and lower sides to be fixed to the cast iron rope 110.

상기 에스알 콘크리트말뚝(100)은 [도 2]에 도시된 바와 같이, 다수의 주철근(110)과 상기 주철근(110)을 원형으로 감싸는 다수의 섬유보강재(120)를 겹이음 되도록 상기 주철근(110)에 철사 등의 고정수단을 사용하여 고정한 후 형틀에 배치한 다음 콘리리트(130)를 타설하고 상기 형틀을 고속으로 회전시키면 원심력에 의해 타설된 콘크리트(130)는 형틀의 내측면으로부터 소정의 두께를 가지도록 형성되며, 상기 타설된 콘크리트(130)가 경화될 경우 자연스럽게 중공관 형태로 제작된다.
As shown in FIG. 2, the concrete pile 100 includes a plurality of main reinforcing bars 110 and a plurality of fiber reinforcing bars 120 surrounding the reinforcing bars 110 in a circular shape, The concrete 130 placed by the centrifugal force is moved from the inner side of the mold to a predetermined thickness by a predetermined thickness And when the poured concrete 130 is cured, it is naturally formed into a hollow tube shape.

상기 섬유보강재(120)는 [도 1]에 도시된 띠철근(20) 및 기존 콘크리트말뚝의 수평력 및 휨모멘트에 대한 저항능력을 개선하기 위한 보강철근의 대체구성물로, 횡방향의 섬유그리드(121)와 종방향의 섬유그리드(122)로 구성된다.The fiber reinforcing member 120 is an alternative constituent of reinforcing steel for improving the resistance to the horizontal and bending moments of the belt bar 20 and the existing concrete pile shown in FIG. And a fiber grid 122 in the longitudinal direction.

이때 상기 횡방향의 섬유그리드(121)는 기존의 띠철근(20), 종방향의 섬유그리드(122)는 기존의 보강철근을 대체할 뿐더러 주철근(110)을 보강하는 역할을 수행하게 된다.At this time, in the fiber grid 121 in the transverse direction, the existing band reinforcement 20 and the longitudinal fiber grid 122 replace the existing rebar and reinforce the cast iron 110.

그리고 [도 3]에 도시된 바와 같이, 상기 횡방향의 섬유그리드(121)의 간격(H)은 25~75㎜, 상기 종방향의 섬유그리드(122)의 간격(L)은 40~100㎜로 형성되고, 상기 횡방향의 섬유그리드(121)의 폭(D)은 5㎜, 두께는 1㎜, 상기 종방향의 섬유그리드(122)의 폭(D')은 10㎜, 두께는 1~10㎜로 형성되도록 구성됨이 바람직한데, 이는 상기 간격이 너무 좁으면 콘크리트(130) 타설 및 섬유그리드(121,122)의 사이로 콘크리트(130)의 투입이 어렵고, 간격이 너무 넓으면 횡방향의 섬유그리드(121)에 의한 수평력 및 휨모멘트에 대한 저항능력의 개선이 어려울 뿐더러 종방향의 섬유그리드(122)에 의한 주철근(110)의 보강력이 저하되기 때문이다.3, the distance H between the fiber grids 121 in the transverse direction is 25 to 75 mm and the distance L between the longitudinal fiber grids 122 is 40 to 100 mm The width D of the fiber grid 121 in the transverse direction is 5 mm and the thickness is 1 mm, the width D 'of the longitudinal fiber grid 122 is 10 mm, If the interval is too narrow, it is difficult to insert the concrete 130 and the concrete 130 between the fiber grids 121 and 122. If the gap is too wide, it is preferable to form the fiber grids in the lateral direction 121 are difficult to improve resistance to horizontal and bending moments and the strength of the cast iron rope 110 due to the longitudinal fiber grids 122 is reduced.

그리고 [도 2]에 도시된 바와 같이, 상기 섬유보강재(120)의 양단부는 종방향으로 100㎜ 이상 겹이음, 상하단부는 횡방향으로 300㎜ 이상 겹이음이 되도록 구성됨이 바람직한데, 이는 상기 섬유보강재(120)의 안정적인 결합구조와 함께 종방향과 횡방향의 겹이음 부위에 의한 콘크리트말뚝(100)의 수직력과 수평력 및 휨모멘트에 대한 저항능력을 더욱 개선하기 위함이다. As shown in FIG. 2, it is preferable that both end portions of the fiber reinforcing member 120 are configured to be overlapped by 100 mm or more in the longitudinal direction and the upper and lower end portions are overlapped with each other by 300 mm or more in the transverse direction, The present invention is intended to further improve the ability of the concrete pile 100 to resist the vertical force and the horizontal force and the bending moment due to the longitudinal and transverse lap joints.

그리고 상기 횡방향의 섬유그리드(121)는 탄성섬유로 배치되고 상기 종방향의 섬유그리드(122)는 유리섬유로 배치되도록 구성됨이 바람직한데, 이는 상기 유리섬유보다 고강도인 탄소섬유를 사용함으로써 콘크리트말뚝(100)의 수평력 및 휨모멘트에 대한 저항능력을 더욱 향상시킬 수 있기 때문이다.It is preferable that the transverse fiber grids 121 are arranged as elastic fibers and the longitudinal fiber grids 122 are arranged as glass fibers because by using carbon fibers having higher strength than the glass fibers, It is possible to further improve the resistance against the horizontal force and the bending moment of the hinge 100.

물론 상기 횡방향 및 종방향의 섬유그리드(121,122)에 유리섬유와 탄소섬유를 혼용하여 사용할 수도 있음은 당연하나, 콘크리트말뚝(100)의 제작에 따른 경제적인 부담감을 최소화하기 위해 상기와 같이, 횡방향의 섬유그리드(122)는 탄소섬유로, 종방향의 섬유그리드(121)는 유리섬유로 구성함이 바람직하다.Of course, it is of course possible to use glass fibers and carbon fibers in combination in the lateral and longitudinal fiber grids 121 and 122. However, in order to minimize the economic burden due to the production of the concrete pile 100, It is preferable that the fiber grid 122 in the direction is made of carbon fiber and the fiber grid 121 in the longitudinal direction is made of glass fiber.

그리고 상기 섬유보강재(120)는 고탄성계수와 높은 인장강도를 갖는 유리섬유와 탄소섬유로 격자망을 만들고 이 격자망을 아스팔트 에멀젼에 함침시켜 제조된다.
The fiber reinforcement 120 is fabricated by making a lattice net with glass fiber and carbon fiber having high elastic modulus and high tensile strength and impregnating the lattice net with an asphalt emulsion.

한편, 상기한 구성을 갖는 본 발명 에스알 콘크리트말뚝(100)의 주철근(110)의 피복두께(콘크리트 표면과 주철근 표면 간의 거리)는 최소한 30㎜로 구성됨이 바람직한데, 이는 콘크리트말뚝(100)이 프리캐스트 콘크리트의 일종으로 흙에 직접 노출되므로 내화성, 내구성, 소요강도의 확보, 균열방지를 위해 설계기준상 최소한의 피복두께인 30㎜를 충족해야 하기 때문이다.It is preferable that the covering thickness (distance between the concrete surface and the main iron core surface) of the cast iron muscle 110 of the present invention concrete pile 100 having the above-described structure is at least 30 mm. This is because the concrete pile 100 is free Because it is a type of cast concrete, it is exposed directly to the soil, so it must meet the minimum coating thickness of 30mm in order to secure fire resistance, durability, required strength and prevent cracks.

이때 상기 주철근(10)을 감싸는 격자망 형태의 섬유보강재(120)는 자체 두께가 1~10㎜ 내외에 불과하고 섬유재질의 소재로 이루어지므로 피복두께로부터 자유롭다 할 것이다.At this time, the lattice-net-shaped fiber reinforcing member 120 surrounding the cast iron rope 10 has a thickness of about 1 to 10 mm and is made of a fibrous material, so that it is free from the thickness of the covering.

즉 종래에는 피복두께를 만족하기 위해 띠철근(20)과 보강철근의 두께를 감안하여 콘크리트를 타설하거나 경제적인 이유로 피복두께를 만족하지 못하는 경우 철근 부식, 구조물의 성능저하 등의 문제점이 야기되었다 할 것이다.
In other words, conventionally, when concrete is laid considering the thickness of the reinforcing steel bars and the thickness of the reinforcing bars to satisfy the covering thickness, or when the covering thickness is not satisfied due to economic reasons, problems such as corrosion of the reinforcing steel and deterioration of the performance of the structure are caused will be.

이처럼 본 발명은 주철근(110)과 상기 주철근(110)을 감싸도록 형성된 격자망 형태의 섬유보강재(120)로 구성된 에스알 콘크리트말뚝(110)을 제공하되, 상기 섬유보강재(120) 중 횡방향의 섬유그리드(121)는 기존의 띠철근(20), 종방향의 섬유그리드(122)는 기존의 보강철근을 대체할 뿐더러 상기 섬유보강재(120)와 콘크리트(130)의 일체식 구조로 부착강도 증진과 함께 수직력과 수평력 및 휨모멘트에 대한 저항능력이 크게 향상되어 PHC말뚝, 강관말뚝, 복합말뚝의 대용으로 사용가능토록 하고; 수평력 향상을 위해 불필요한 보강철근의 사용을 자제하고 주철근(110)에 상기 보강철근과 함께 띠철근(20)의 용접작업이 생략되므로 제작이 용이할 뿐더러 경제성이 크게 향상되며; 상기 띠철근(20)과 보강철근의 대용으로 섬유보강재(120)를 사용함에 따라 주철근(110)만 피복두께를 만족하면 되므로 철근 부식, 구조물의 성능저하 등의 문제점을 해결할 수 있다 할 것이다.
As described above, the present invention provides an escalated concrete pile 110 comprising a main reinforcing bar 110 and a lattice network type fiber reinforcing member 120 formed to enclose the main reinforcing bar 110, The grid 121 is formed of the conventional reinforcing bar 120 and the concrete 130 so that the conventional reinforcing bars 120 and the longitudinal fiber grids 122 replace the conventional reinforcing bars. Together with the ability to withstand vertical forces, horizontal forces and bending moments, to be used in place of PHC piles, steel pipe piles and composite piles; Since unnecessary reinforcing bars are not used to improve the horizontal force and the welding work of the reinforcing bar and the reinforcing bars is omitted in the cast steel rope 110, it is easy to manufacture and economical efficiency is greatly improved; The use of the fiber reinforcing material 120 as a substitute for the reinforcing bar and the band reinforcing bar 20 can satisfy the coating thickness only by the reinforcing steel rope 110, thereby solving the problems of corrosion of the reinforcing steel and deterioration of the performance of the structure.

상술한 바와 같이 본 발명은 비록 한정된 실시예에 의해 설명되었으나, 본 발명은 이것에 한정되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능하다 할 것이다.
Although the present invention has been described with reference to the exemplary embodiments, it is to be understood that the present invention is not limited to the disclosed exemplary embodiments, and that various changes and modifications will be apparent to those skilled in the art. Various modifications and variations may be made without departing from the scope of the appended claims.

* 도면의 주요부분에 대한 부호의 설명 *
100: 본 발명 에스알 콘크리트말뚝
110: 주철근 120: 섬유보강재
121,122: 섬유그리드 130: 콘크리트Description of the Related Art [0002]
100: The present invention concrete pile
110: Cast iron 120: Fiber reinforcement
121, 122: Textile grid 130: Concrete

Claims (4)

종방향으로 일정간격 형성된 다수의 주철근(110); 상기 주철근(110)을 원형으로 감싸는 섬유보강재(120); 상기 주철근(110)과 섬유보강재(120)를 포함하는 소정두께의 중공관 형태의 콘크리트(130);로 구성된 콘크리트말뚝에 있어서,
상기 섬유보강재(120)는 격자망 형태를 가지되 주철근(110)에 철사로 고정되고;
상기 주철근(110)의 피복두께(콘크리트 표면과 주철근 표면 간의 거리)는 최소한 30㎜로 구성되며;
상기 섬유보강재(120)의 양단부는 겹이음이 되도록 겹쳐서 주철근(110)에 고정되고, 상기 섬유보강재(120)의 상단부와 하단부도 상하에 배치된 섬유보강재(120)의 하단부와 상단부에 겹이음이 되도록 겹쳐서 주철근(110)에 고정되도록 구성되는 것을 특징으로 하는 섬유보강재를 이용한 에스알 콘크리트말뚝.
A plurality of longitudinal bars 110 formed at regular intervals in the longitudinal direction; A fiber reinforcement 120 that surrounds the cast iron 110 in a circular shape; A concrete pile (130) having a hollow tube shape and having a predetermined thickness including the main steel rope (110) and the fiber reinforcing material (120)
The fiber reinforcing member 120 has a lattice-like shape and is fixed to the cast iron rods 110 with a wire;
The coating thickness of the cast iron 110 (the distance between the concrete surface and the main iron core surface) is at least 30 mm;
Both end portions of the fiber reinforcing member 120 are overlapped and fixed to the cast iron rope 110 so as to overlap the upper and lower ends of the fiber reinforcing member 120. The upper and lower ends of the fiber reinforcing member 120 also overlap with each other at the lower end portion and the upper end portion of the fiber reinforcing member 120, So as to be fixed to the cast iron (110).
제1항에 있어서,
상기 섬유보강재(120)는 횡방향의 섬유그리드(121)와 종방향의 섬유그리드(122)로 구성되되, 상기 횡방향의 섬유그리드(121)의 간격(H)은 25~75㎜, 상기 종방향의 섬유그리드(122)의 간격(L)은 40~100㎜로 형성되고, 상기 섬유그리드(121,122)의 폭(D,D')은 5~10㎜로 형성되도록 구성되는 것을 특징으로 하는 섬유보강재를 이용한 에스알 콘크리트말뚝.
The method according to claim 1,
Wherein the fiber reinforcement member 120 is composed of a fiber grid 121 in the transverse direction and a fiber grid 122 in the longitudinal direction and the interval H between the fiber grids 121 in the transverse direction is 25 to 75 mm, Characterized in that the spacing L of the fiber grids 122 in the direction of the fiber is formed to be 40 to 100 mm and the widths D and D of the fiber grids 121 and 122 are formed to be 5 to 10 mm. An ash concrete pile using reinforcing materials.
제1항에 있어서,
상기 섬유보강재(120)의 양단부는 종방향으로 100㎜ 이상 겹이음, 상하단부는 횡방향으로 300㎜ 이상 겹이음이 되도록 구성되는 것을 특징으로 하는 섬유보강재를 이용한 에스알 콘크리트말뚝.
The method according to claim 1,
Wherein the fiber reinforcing member (120) is configured such that both ends of the fiber reinforcing member (120) are overlapped by 100 mm or more in the longitudinal direction and the upper and lower end portions are overlapped in the lateral direction by 300 mm or more.
제2항 또는 제3항에 있어서,
상기 횡방향의 섬유그리드(121)는 탄성섬유로 배치되고, 상기 종방향의 섬유그리드(122)는 유리섬유로 배치되도록 구성되는 것을 특징으로 하는 섬유보강재를 이용한 에스알 콘크리트말뚝.The method according to claim 2 or 3,
Wherein the transverse fiber grids 121 are arranged as elastic fibers and the longitudinal fiber grids 122 are arranged as glass fibers.
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