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KR0151684B1 - Installation method of precast concrete beam - Google Patents

Installation method of precast concrete beam

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Publication number
KR0151684B1
KR0151684B1 KR1019950028209A KR19950028209A KR0151684B1 KR 0151684 B1 KR0151684 B1 KR 0151684B1 KR 1019950028209 A KR1019950028209 A KR 1019950028209A KR 19950028209 A KR19950028209 A KR 19950028209A KR 0151684 B1 KR0151684 B1 KR 0151684B1
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KR
South Korea
Prior art keywords
height
beams
precast concrete
cone
tension
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
KR1019950028209A
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Korean (ko)
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KR970011227A (en
Inventor
김선자
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김선자
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Priority to KR1019950028209A priority Critical patent/KR0151684B1/en
Publication of KR970011227A publication Critical patent/KR970011227A/en
Application granted granted Critical
Publication of KR0151684B1 publication Critical patent/KR0151684B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

본 발명은 프리캐스트 콘 들보의 설치공법에 관한 것으로서, 들보의 자중에 의한 휨모멘크가 연속보의 모멘트와 유사한 형태를 취하게 함으로써 들보의 내하력을 증가시킬 목적으로, 일련의 교각위에 재치된 프리캐스트 콘 들보의 최외측 단부를 높이조절이 가능한 가설받침위에 영구받침보다 높게되도록 올려놓은 상태에서 들보의 단부 사이의 공간에 콘를 타설하여 경화시키고 들보의 윗면에 설치된 돌기부의 구멍을 통해 인장강재를 삽입하여 이것을 인장함과 동시에 가설받침의 높이를 감소시켜 인장이 완료될 때 돌보의 단부가 영구받침에 의해 지지되도록 함을 특직으로 하는 공법으로서 자중에 의한 휨모멘트가 연속보와 유사한 형태를 취하게 되어 내하력이 증가되는 효과가 있다.The present invention relates to a method for installing a precast cone beam, wherein a precast beam is placed on a series of piers for the purpose of increasing the load capacity of the beam by causing the bending momentum due to the weight of the beam to take a form similar to that of the continuous beam. With the outermost end of the cone beam placed on the height-adjustable temporary support higher than the permanent support, the cone is placed in the space between the ends of the beam and cured, and the tensile steel is inserted through the hole of the protrusion provided on the upper side of the beam. It is a special technique that allows the end of the bolster to be supported by the permanent bearing when the tension is completed by reducing the height of the temporary bearing at the same time as the tension, and the bending moment due to its own weight takes the form of a continuous beam. This has an increasing effect.

Description

프리캐스트 콘크리트 들보의 설치공법Installation method of precast concrete beam

제1도는 들보를 교각위에 올려 놓은 제1공저의 개략도.1 is a schematic diagram of a first deduction with beams placed on a piers.

제2도는 들보의 단부 사이의 공간에 콘를 타설하고 정착용 돌기부를 통해 인장부재를 설치한 상태의 본 발명 제2공정을 나타내는 개략도.2 is a schematic view showing a second step of the present invention in a state in which a cone is placed in a space between ends of the beams and a tension member is installed through a fixing projection.

제3도는 인장작업을 실시하면서 가설받침으로 받쳐놓았던 최외측 단부를 내리는 제3공정의 개략도.3 is a schematic view of the third process of lowering the outermost end supported by the hypothesis support while performing the tensioning operation.

제4도는 공정별 휨 모멘트를 나타내는 설명도.4 is an explanatory diagram showing the bending moment for each process.

제5도는 다음 경간의 들보를 연결할때의 제1공정의 개략도.5 is a schematic view of the first process when connecting the beam of the next span.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 들보 2 : 교각1: beams 2: piers

3 : 가설받침 4 : 영구받침3: Hypothesis support 4: Permanent support

5 : 콘크리트 6 : 돌기부5: concrete 6: protrusion

7 : 인장부재 8 : 정착구7: tension member 8: anchorage

9 : 프리스트레싱용 잭9: prestressing jack

본 발명은 교량의 상부구조에 사용되는 프리캐스트 콘크리트 들보의 설치 공법에 관한 것이다. 상세하게는 들보가 교각 위에서 연결되어 연속보를 이루게 하는 공법에 관한 것이다The present invention relates to the installation method of precast concrete beams used in the superstructure of bridges. More specifically, it relates to a method for the beams to be connected on the bridge to form a continuous beam.

본 발명자는 1993년 특허출원 제 22375호에서 들보의 자중에 의한 휨모멘트가 연속보의 휨모멘트와 유사한 분포를 가지게하는 프리캐스트 콘크리트 들보의 설치공법을 제안한 바 있다. 이 발명에선ㄴ 단순보 상태로 지지된 들보의 중앙점이 상향의 힘을 가하여 들보를 위로 휘어지게한 상태에서 연결부에 콘크리트를 타설하고 인장강재를 설치하여 인장을 실시함과 동시에 들보 중앙점에 가한 상향의 힘을 감소시킴으로써 자중에 의한 휨모멘트가 이웃한 들보로 전달하게 하였다. 이 발명에서는 들보의 중앙점에 상향의 힘을 가해야하는 까닭에 가설기둥을 설치하거나 기중기를 사용해야 하는 번거로움이 있었다.The present inventor has proposed in 1993 Patent Application No. 22375 a method for installing precast concrete beams in which the bending moment due to the weight of the beam has a distribution similar to the bending moment of the continuous beam. In the present invention, the center point of the beam supported in the simple beam state is applied with upward force and the beam is bent upward. By reducing the force of, the bending moment due to its own weight is transmitted to the neighboring beams. In this invention, since the force of the upward force is applied to the center point of the beam, there is the trouble of installing a temporary pillar or using a crane.

본 발명에서는 보다 간단한 장비를 사용하면서도 동일한 효과를 얻기 위하여 다음과 같이 개선된 방법을 사용한다.The present invention uses the improved method as follows to achieve the same effect while using simpler equipment.

즉, 최초에 프리캐스트 콘크리트 들보를 단순보 상태로 교각위에 올려놓으때 미리 최외측 교각위에 높이조절이 가능한 가설받침(유압잭, 스크류잭등)을 설치하여 그 위에 들보의 최외측 단부를 최종적으로 설치하고자 하는 높이보다 소정의 높이만큼 더 높게 되도록 올려 놓는다. 다음, 인접한 들보의 단부 사이의 공간에 콘크리트를 타설하여 경화시키고 들보의 윗면에 돌출한 정착용 돌기부의 구성을 통해 프리스트레싱용 인장강재를 설치한다. 프리스트레이싱용 잭과 정착구를 사용하여 인장강재를 인장함과 동시에, 최외측 교각위에 놓인 높이조절이 가능한 가설받침의 높이를 감소시켜서 인장이 완료됨과 동시에 들보의 최외측 단부가 최종적으로 설치하고자 하는 높이에 도달하도록 한다.In other words, when the precast concrete beams are initially placed on the piers in the form of simple beams, they can be installed in advance on the outermost piers (hydraulic jacks, screw jacks, etc.), and finally install the outermost ends of the beams on them. The height is set to be higher than the desired height by a predetermined height. Next, concrete is poured into the space between the ends of adjacent beams, and the tensile steel for prestressing is installed through the configuration of fixing protrusions protruding from the upper surface of the beams. The pretracing jacks and anchorages are used to tension the tensile steel and reduce the height of the adjustable height bearings placed on the outermost pier to complete the tensioning and at the same time the final outer end of the beam To reach.

이와같이 하여 전번 발명에서와 같이 가설기둥이나 기중기둥을 사용하지 않고서 보다 간단한 장비만을 사용하여 들보의 자중에의해 발생하는 휨모멘트가 연속보의 모멘트와 유사한 형태를 가지게 되는 효과를 얻는 것이다.In this way, as in the previous invention, the bending moment generated by the weight of the beam is similar to that of the continuous beam using the simpler equipment without using the temporary column or the lifting column.

이하 본 발명의 실시예를 공정별로 첨부도면과 함께 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with accompanying drawings for each process.

[제1공정][Step 1]

첨부도면의 제1도에 도시한 바와같이 들보(1)를 교각(2)위에 단순보상태로 올려 놓는다. 이때 최외측 교각(2)위에 높이 조절이 가능한 가설받침(3)(유압잭, 스크류잭등)등을 놓고 그 상단을 최종적으로 돌보가 설치되는 영구받침(4)의 상단보다 소정의 높이(H)만큼 높게 되도록 조절한 상태에서 들보를 지지하도록 한다.As shown in FIG. 1 of the accompanying drawings, the beam 1 is placed on the pier 2 in a simple beam state. At this time, the height adjustable height (3) (hydraulic jack, screw jack, etc.) is placed on the outermost pier (2), the upper end of the predetermined height (H) than the upper end of the permanent support (4) is finally installed Be sure to support the beam with the height adjusted as high as possible.

이상태에서는 들보의 자중에의해 발생하는 휨모멘트는 제4도의 (a)와 같은 형태로 된다.In this state, the bending moment generated by the weight of the beam becomes as shown in Fig. 4A.

[제2공정][Step 2]

들보(1)의 단부사이의 공간에 콘크리트(5)를 타설하여 경화시키고, 들보(1)의 윗면에 돌출한 정착용 돌기부(6)의 구멍을 통해 프리스트레싱용 인장강재(7)를 설치한다.The concrete 5 is poured into the space between the ends of the beam 1 to harden, and a prestressing tensile steel 7 is provided through the hole of the fixing projection 6 protruding from the upper surface of the beam 1.

[제3공정][Step 3]

정착용 돌기(6)에 정착구(8)와 프리스트레싱용 잭(9)을 설치하여 인장강재(7)를 인장함과 동시에 높이조절이 가능한 가설받침(3)의 높이를 감소시켜서 인장이 완료됨과 동시에 들보(1)가 영구받침(4)위에 지지되도록 한다.Fixing protrusions (6) and prestressing jacks (9) are installed in the fixing projections (6) to tension the tensile steel (7) and at the same time reduce the height of the adjustable temporary support (3) to complete the tension at the same time Make sure the beam (1) is supported on the permanent support (4).

이와같은 공정을 통하여 연결된 들보에는 제4도의 (b)와 같은 휨모멘트가 도입되며 이것이 기존에 발생된 휨모멘트(a)와 합해져서 (c)와 같은 모멘트 분포가 이루어지며, 경간 중앙점에서의 휨모멘트가 단순보 상태보다 작아져서 들보의 내하력의 증가를 꾀할 수 있는 것이다.The beam connected through this process is introduced with the bending moment as shown in (b) of FIG. 4, which is combined with the existing bending moment (a) to produce the moment distribution as shown in (c). The bending moment becomes smaller than that of the simple beam, which can increase the load capacity of the beam.

한편, 이미 연결된 들보에 새로운 들보를 추가로 연결하고자할 경우에는 제5도와 같이 최외측 교각위에 가설받침을 영구밭침보다 소정의 높이만큼 높게 되도록 하여 설치하는 것을 시작으로 상기의 공정을 반복함으로서 목적을 달성할 수 있다.On the other hand, if you want to additionally connect the new beam to the already connected beams, repeat the above process by starting to install the hypothesis on the outermost pier by a predetermined height above the outermost piers as shown in FIG. Can be achieved.

Claims (1)

일련의 프리캐스트 콘크리트 들보(1)를 설치함에 있어 최외측에 위치한 들보의 외측단부를 최종적으로 설치하고자 한는 위치보다 소정의 높이(H)만큼 높게한 상태로 임시 거치하고, 이 들보의 반대쪽단부와 인접한 들보의 단부 사이의 공간에 콘크리트(5)를 타설한 뒤 경화시키고 들보의 일부분에 형성된 구멍을 통하여 기 타설된 콘크리트(5)에 압축력을 가할 수 있도록 인장부재(7)를 배치한 뒤 인장부재(7)를 인장함과 동시에 임시 거치된 최외측 단부를 낮추어 인장작업이 완료됨과 동시에 최외측 단부가 최종적으로 설치하고자 하는 위치에 이르도록 하는 것을 특징으로 하는 프리캐스트 콘크리트 들보의 설치공법.In installing a series of precast concrete beams (1), temporarily mounting the outer end of the beam located at the outermost side by a predetermined height (H) above the position to be finally installed, and the opposite end of the beam After placing the concrete (5) in the space between the ends of the adjacent beams and placing the tension member (7) to apply a compressive force to the other concrete (5) through the hole formed in the portion of the beam and the tension member The method of installing precast concrete beams characterized in that the tensioning is completed and the outermost end is temporarily lowered and the outermost end reaches the position where the outermost end is to be finally installed.
KR1019950028209A 1995-08-31 1995-08-31 Installation method of precast concrete beam Expired - Fee Related KR0151684B1 (en)

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KR1019950028209A KR0151684B1 (en) 1995-08-31 1995-08-31 Installation method of precast concrete beam

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Application Number Priority Date Filing Date Title
KR1019950028209A KR0151684B1 (en) 1995-08-31 1995-08-31 Installation method of precast concrete beam

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KR970011227A KR970011227A (en) 1997-03-27
KR0151684B1 true KR0151684B1 (en) 1998-10-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100499839B1 (en) * 2002-09-18 2005-07-07 우경건설 주식회사 incremental launching method for bridge construction by the lifting and dropping the support point of the nose
KR101442980B1 (en) * 2013-06-18 2014-09-23 주식회사 포스코건설 Prestressed concrete beam using a wedge-shape pin bar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100499839B1 (en) * 2002-09-18 2005-07-07 우경건설 주식회사 incremental launching method for bridge construction by the lifting and dropping the support point of the nose
KR101442980B1 (en) * 2013-06-18 2014-09-23 주식회사 포스코건설 Prestressed concrete beam using a wedge-shape pin bar

Also Published As

Publication number Publication date
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