KR19990068518A - The Structural Continuity Method for Prestreseed Concrete Bridge of Composite I-Beam - Google Patents
The Structural Continuity Method for Prestreseed Concrete Bridge of Composite I-Beam Download PDFInfo
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- KR19990068518A KR19990068518A KR1019990019658A KR19990019658A KR19990068518A KR 19990068518 A KR19990068518 A KR 19990068518A KR 1019990019658 A KR1019990019658 A KR 1019990019658A KR 19990019658 A KR19990019658 A KR 19990019658A KR 19990068518 A KR19990068518 A KR 19990068518A
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- bridge
- tendon
- psc
- continuous
- concrete
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- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000004567 concrete Substances 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title abstract description 10
- 210000002435 tendon Anatomy 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000012163 sequencing technique Methods 0.000 claims abstract description 5
- 239000011513 prestressed concrete Substances 0.000 claims abstract 2
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000011437 continuous method Methods 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 239000010426 asphalt Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/10—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
본 발명은 프리스트레스트 콘크리트 합성 아이빔교량[이하, 합성형 피에스씨(P.S.C.) 아이빔(I-BEAM)교량]을 현장에서 프리스트레싱 텐던을 이용하여 구조적으로 연속화 하는 공법에 관한 것이다.The present invention relates to a method of structurally sequencing a prestressed concrete synthetic i-beam bridge (hereinafter referred to as a synthetic P.S.C. I-Beam bridge) using prestressing tendons in the field.
본 발명에 의한 연속화 공법은 기존 공법에 의해 건설되는 동일형식의 교량에 비해 사용 재료(콘크리트, 철근, 프리스트레싱 강재)의 양을 대폭 감소시킬 수 있음은 물론이고, 연속교의 구조거동을 확실히 확보할 수 있다는 장점을 갖고 있다. 또한 종래의 교량가설공법에서는 전체 프리스트레싱 텐던을 합성전 단면인 피에스씨 아이빔에만 도입하는 것에 비해, 본 발명에 의한 공법은 현장타설 콘크리트 바닥판과 피에스씨 아이빔이 합성된 상태에서 2차 텐던의 일부를 긴장하여 전체 합성단면에 선행압축력을 도입하게 되므로 기존의 합성형 피에스씨 아이빔 연속교가 갖는 부 모멘트에 의한 중간 지점부 부근 상부 바닥판의 균열발생 문제점을 제거하여 교량의 내구성을 대폭 증대 시킬 수 있다.The continuous method according to the present invention can significantly reduce the amount of materials used (concrete, rebar, prestressed steel) compared to the same type of bridges constructed by the existing method, as well as ensure the structural behavior of the continuous bridge. Has the advantage. In addition, in the conventional bridge construction method, the entire prestressing tendon is introduced only to the PSC i-beam, which is the cross section before synthesis, but the method according to the present invention is a part of the secondary tendon in the state where the cast-in-place concrete deck and the PSC i-beam are synthesized. Since tension is applied to the entire composite cross section by tension, the durability of the bridge can be greatly increased by eliminating the problem of cracking in the upper base plate near the mid point due to the minor moment of the conventional composite PSC i-beam continuous bridge.
Description
본 발명은 합성형 피에스씨 아이빔 교량을 현장에서 긴장하는 연속 프리스트레싱 텐던를 통하여 구조적으로 연속화 시켜서 교량의 내구성 증대 및 교량가설비용을 절감시킬 수 있는 가설공법을 제안하는 것이다.The present invention proposes a construction method by which the composite PSC i-beam bridge can be structurally continuous through a continuous prestressing tendon straining in the field, thereby increasing the durability of the bridge and reducing the use of the bridge.
본 발명이 속하는 기술분야는 토목분야로서 각종 도로교 및 철도교 건설에 널리 이용되는 합성 피에스씨 아이빔 교량의 구조적 연속화 공법에 해당된다.The technical field of the present invention is a civil engineering field, which corresponds to a structural continuum construction method of a synthetic PSC i-beam bridge widely used in construction of various road bridges and railway bridges.
동 교량형식에 적용되고 있는 기존의 연속화 공법은 차량하중에 대한 교량상부구조의 연속성을 확보하기 위해 중간지점부의 상부바닥판을 철근으로 연결한 후, 바닥판 콘크리트를 일체로 타설하는 방식이다. 하지만 기존의 연속화 공법은 차량하중에 의해 생기는 부 모멘트로 인해 중간 지점부 상부바닥판에 휨 균열이 유발되는 문제점을 갖고 있어 교량의 내구성 및 유지관리 측면에서 매우 불리한 요소를 내재하고 있다. 또한 교량 상부구조를 형성하고 있는 각종 부재요소(피에스씨 아이빔의 형상 및 크기 그리고 배치간격, 프리스트레싱 강재량)의 제원 결정을 구조적으로 불리한 단순교를 기준으로 하고 있어 경제성 측면에서도 매우 불리하다.The existing sequencing method applied to the bridge type is to connect the bottom plate of the middle point with reinforcing bars and to cast the bottom plate concrete integrally in order to secure the continuity of the upper structure of the bridge. However, the existing sequencing method has a problem that bending cracks are caused in the upper base plate at the mid-point due to the minor moment generated by the vehicle load, and thus, there are inherent disadvantages in terms of durability and maintenance of the bridge. In addition, it is very disadvantageous in terms of economic feasibility because the determination of the specifications of various member elements (the shape and size of PSC i-beams, the spacing of placement and the amount of prestressing steel) forming the bridge superstructure is based on the structurally disadvantaged simple bridge.
상부 바닥판 및 피에스씨 아이빔 모두를 구조적으로 연속화 시킴으로써 교량 상부구조를 구성하는 각 해당요소의 재료사용 효율성을 대폭 향상시켜 경제적인 교량가설 공법을 제시하고, 기존의 연속화 공법과는 달리 피에스씨 아이빔과 상부바닥판이 구조적으로 완전히 합성된 상태에서 연속형태의 프리스트레싱 텐던에 긴장력을 도입함으로써 중간 지점부 상부 바닥판에 생기는 휨 균열을 영구히 제거하여 교량의 내구성을 대폭 증가 시키는 것이 본 발명의 주요기술과제이다.By structurally continually constructing both the upper base plate and the PSC i-beam, the material use efficiency of each element constituting the bridge superstructure is greatly improved to present an economic bridge construction method, and unlike the conventional sequencing method, The main technical task of the present invention is to permanently remove the bending cracks generated in the mid-floor top bottom plate by introducing tension in the continuous prestressing tendon in the state where the top bottom plate is completely structurally synthesized.
도 1 은 합성형 피에스씨 아이빔 교량의 표준 횡단면도1 is a standard cross-sectional view of a composite PSC i-beam bridge.
도 2 는 본 발명에 의한 3경간 연속 합성형 피에스씨 아이빔교의 구조적 연속화를 위한 시공순서2 is a construction sequence for the structural continuity of the three-span continuous composite PSC i-beam bridge according to the present invention
도 3 은 본 발명에 의한 4 경간 연속 합성형 피에스씨 아이빔 교량의 구조적 연속화를 위한 시공순서.Figure 3 is a construction sequence for the structural continuity of the four-span continuous composite type PS eye beam bridge according to the present invention.
도 4 는 피에스씨 아이빔에 배치되는 프리스트레싱 텐던의 형상 및 종류4 is a shape and type of prestressing tendon disposed in the PS eye beam;
도 5 는 피에스씨 아이빔의 현장이음부 상세5 is a detail of the field joint of the CS eye beam
도 6 은 가설단계에서 피에스씨 아이빔을 지지하는 임시받침의 상세6 is a detail of the temporary support for supporting the PS eye beam in the construction phase
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
1 : 피에스씨 아이빔(P.S.C. I-BEAM) 2 : 가로보1: P.S.C. I-BEAM 2: Horizontal beam
3 : 현장타설 콘크리트 바닥판 4 : 아스팔트 포장3: cast-in-place concrete deck 4: asphalt pavement
5 : 1차 텐던 6 : 2차 텐던(빔 연결용)5: 1st tendon 6: 2nd tendon (for beam connection)
7 : 2차 텐던(합성단면상태) 8 : 임시받침7: 2nd tendon (synthetic cross section) 8: Temporary support
9 : 현장 이음부 10 : 영구받침9: site joint 10: permanent bearing
11 : 텐던 정착장치 12 : 텐던 연결장치11: tendon fixing device 12: tendon connecting device
13 : 강재 쉬스관13: steel sheath pipe
본 발명의 합성형 피에스씨 아이빔 교량의 연속화 공법의 구성 및 작용을 첨부도면에 의거해 상세히 설명하면 다음과 같다.The configuration and operation of the sequential construction method of the composite PSC i-beam bridge of the present invention will be described in detail with reference to the accompanying drawings.
도 1 은 1 등급 도로교 설계에 적용되는 합성형 피에스씨 아이빔교량의 표준 횡단면도를 표시한 것이다. 합성단면을 구성하고 있는 각 부재요소(1),(2),(3)의 단면 제원은 대상교량의 사용 용도(도로교, 철도교) 및 경간장에 의해 변화되므로 상세한 구조해석을 통하여 결정한다.1 shows a standard cross-sectional view of a composite PSC i-beam bridge applied to a class 1 road bridge design. The cross-sectional specification of each member element (1), (2), (3) constituting the composite section is determined by the detailed structural analysis because it is changed by the intended use of the bridge (road bridge, railway bridge) and span length.
도2는 본 발명에 의한 공법으로 가설되는 교장 10OM 미만의 3경간(또는 2경간)으로 구성되는 합성형 피에스씨 아이빔의 연속교의 시공순서도 이다. 교량 총연장이 1OOM 미만의 교량에 있어서는 아이빔의 구조적 연속화와 상부 바닥판에 선행 압축응력 도입을 위해 배치하는 2 차 텐던은 양 교대(ABUTMENT)에서 긴장한다. 현장의 작업 여건상 구조물 양 교대에서의 텐던의 양단긴장이 불가능할 경우에는 도 3 에 제시한 일방향 가설공법을 적용한다. 공장 또는 제작장에서 프리캐스트 프리스트레스트 아이빔(1)에 1 차 강선(5)을 긴장한 후 크레인을 이용하여 각 교대 및 교각에 설치한 임시받침(8)위에 단순교 형태로 거치한다. 가로보(2) 및 현장이음부(9)의 콘크리트를 타설 및 양생하여 아이빔을 연결시킨 후 첫번째 2 차 강선(6)을 긴장한다. 그런 다음 현장타설 콘크리트 바닥판(3)을 타설 및 양생하여 합성단면을 형성시키고, 나머지 2 차 강선(7)을 긴장하여 합성단면에 선행 압축력을 도입한다. 교면에 아스팔트 포장(4)을 타설하고 임시받침(8)을 제거하여 영구받침(10)이 하중을 받게 한다. 본 발명에 의한 시공법은 2 경간 연속교량에 대해서도 같은 방법의 과정을 걸쳐 적용할 수 있다.2 is a construction sequence diagram of a continuous bridge of a composite PSC i-beam composed of three spans (or two spans) less than the principal 10 OM hypothesized by the construction method according to the present invention. For bridges of less than 1 OOM in length, the secondary tendons placed for structural continuity of the i-beams and the introduction of the precompressed compressive stresses in the upper deck are tensioned at both shifts. If the tension between both ends of the tendon is not possible due to the working conditions of the site, the one-way construction method shown in FIG. 3 is applied. After tensioning the primary steel wire (5) to the precast prestressed i-beam (1) in the factory or manufacturing workshop, it is mounted in a simple bridge form on the temporary support (8) installed on each shift and piers using a crane. After placing and curing the concrete of the cross beam 2 and the field joint 9, the first secondary steel wire 6 is tensioned after connecting the i-beams. Then, the cast-in-place concrete slab 3 is poured and cured to form a composite section, and the remaining secondary steel wire 7 is tensioned to introduce the preceding compressive force to the composite section. Place the asphalt pavement 4 on the bridge and remove the temporary bearing 8 so that the permanent bearing 10 is loaded. The construction method according to the present invention can be applied to a two-span continuous bridge over the same process.
도 3 은 본 발명 공법에 의해 가설되는 교장 10OM 이상의 다 경간(4 경간 이상의)으로 구성되는 합성형 피에스씨 아이빔 연속교량의 시공순서도다. 포스트텐션닝 방식으로 긴장되는 텐던 사용의 효율성을 제고하여 4 경간 이상의 다 경간 연속교량에 대해서는 2내지 3경간 마다 1개소의 텐던 연결구(12)를 설치한다. 도 3 의 상단은 양 방향을 동시에 시공할 때의 순서도를 나타내고, 하단은 현장 여건상 일 방향 시공이 필요할 때의 순서도이다.3 is a construction sequence diagram of a composite PSC i-beam continuous bridge composed of multi-span (more than 4 spans) of principal 10OM or more hypothesized by the method of the present invention. In order to improve the efficiency of using the tendon tensioned by the post-tensioning method, for a multi-span continuous bridge over four spans, one tendon connector 12 is installed every two to three spans. 3 shows a flow chart when constructing both directions at the same time, and the lower figure shows a flow chart when one-way construction is required on site conditions.
도4는 피에스씨 아이빔 내부에 설치되는 프리스트레싱 텐던의 배치형상 및 텐던수를 나타낸 것이다. 프리스트레싱 텐던은 피에스씨 아이빔의 운반 및 거치를 위해 사용되는 단순포물선 형태의 1 차 텐던 2 가닥(5)과 피에스씨 아이빔의 연속시키기 위한 텐던(6)과 바닥판 슬래브에 압축응력을 도입하기 위한 텐던(7)으로 구성되고, 양 텐던은 교량가설 현장에서 순차적으로 긴장한다.Fig. 4 shows the arrangement shape and the number of tendons of the prestressing tendons installed inside the PSC i-beam. The prestressing tendon is a simple parabolic two strand (5) in the form of a simple parabola used for transporting and mounting the PS eye beam, and a tendon (6) for continuation of the PS eye beam and a tendon for introducing compressive stress to the bottom plate slab. Consisting of (7), both tendons are sequentially strained at the site of bridge construction.
도 5 는 피에스씨 아이빔의 현장 이음부 상세도로서 피에스씨 아이빔(1)내에 배치된 종 방향 철근은 철근 커플러를 사용하여 서로 구조적으로 연결하고, 2 차 텐던(6),(7)의 삽입 및 보호를 위해 강재 쉬스관(13)을 미리 설치한 후 이음부 콘크리트를 타설 및 양생하여 현장 이음부(9)를 완성시킨다. 도의 좌측은 텐던 연결구(12)를 설치하여 2 차 텐던을 연결하는 구간의 상세도이고, 우측은 강재 쉬스관만(13)을 사용하여 2 차 텐던을 연결하는 구간의 상세도이다.FIG. 5 is a detailed view of the site joint of the PS eye beam, in which longitudinal bars disposed in the CS eye beam 1 are structurally connected to each other using a reinforcing bar coupler, and insertion of secondary tendons 6 and 7; After the steel sheath pipe 13 is installed in advance for protection, the joint of the concrete is poured and cured to complete the site joint (9). The left side of the figure is a detailed view of the section connecting the secondary tendon by installing the tendon connector 12, the right is a detail view of the section connecting the secondary tendon using the steel sheath pipe 13 only.
도 6 은 피에스씨 아이빔을 지지하는 임시받침의 상세도이다. 임시받침(8)은 내부 채움재인 모래, 이것을 외부에서 둘러싸고 강재원통형 구조, 그리고 내부 모래를 외부에서 빼낼 수 있는 밸브장치로 구성된다. 이러한 구조형식을 채택함으로써 영구받침이 설치된 후에 별도의 보조장치 없이도 임시받침을 손쉽게 제거할 수 있다.6 is a detailed view of the temporary support supporting the PS eye beam. The temporary support 8 is composed of sand as an inner filling material, a steel cylindrical structure surrounding the outside, and a valve device for extracting the inner sand from the outside. By adopting this type of structure, the temporary supports can be easily removed after the permanent supports have been installed without the need for additional aids.
본 발명에 의한 합성형 피에스씨 아이빔 교량의 구조적 연속화 공법을 적용하면 종래의 연속화 공법이 갖고 있는 중간지점부 상부바닥판의 균열문제와 연속교의 형태를 지니지만 단순교로 설계되는 구조적 측면에서의 비 효율성을 완전히 제거할 수 있다. 따라서 본 발명의 공법을 적용하여 합성형 피에스씨 아이빔 교량을 시공하면 교량의 내구성을 현저히 증가 시킬 수 있고, 연속교의 구조특성을 살린 구성요소의 경제적인 설계가 가능하므로 기존의 공사비보다 저렴한 가격으로 휠씬 품질이 뛰어난 교량을 건설할 수 있다.When the structural continuity method of the composite PSC i-beam bridge according to the present invention is applied, there is a problem of cracking and the shape of the continuum bridge of the upper bottom plate of the middle point part of the conventional continuity method, but in terms of the structural aspect designed as a simple bridge. The efficiency can be completely eliminated. Therefore, if the composite PSC i-beam bridge is applied by applying the method of the present invention, the durability of the bridge can be remarkably increased, and economical design of the components utilizing the structural characteristics of the continuous bridge is possible, resulting in a much lower price than the existing construction cost. Can build bridges of high quality.
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| KR1019990019658A KR100349864B1 (en) | 1999-05-29 | 1999-05-29 | The Structural Continuity Method for Prestreseed Concrete Bridge of Composite I-Beam |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000063499A (en) * | 2000-07-18 | 2000-11-06 | 박창열 | Tension method of PS steel to improve bridge performance. |
| KR20030003200A (en) * | 2002-12-10 | 2003-01-09 | 원대연 | PC omitted |
| KR100374284B1 (en) * | 1999-12-10 | 2003-03-28 | 김우종 | A psc beam having above typed anchor blocks and connecting method thereof |
| KR100403988B1 (en) * | 2000-07-27 | 2003-11-01 | 김진수 | Method for forming continuous p.s.c beams with steel plate girder splice and apparatus thereof |
| KR100420012B1 (en) * | 2001-03-07 | 2004-02-25 | 김진수 | Bridge using separately fabricated pre-stressed beams having different lengths and continuous construction method therefor |
| KR20040049590A (en) * | 2002-12-06 | 2004-06-12 | 한국과학기술원 | Multiple Stage prestressed Girder |
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| US7047704B1 (en) | 1999-10-08 | 2006-05-23 | Interconstec Co., Ltd. | Method for designing and fabricating multi-step tension prestressed girder |
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| KR100691848B1 (en) * | 2004-05-17 | 2007-03-12 | 인하대학교 산학협력단 | Continuous PS Concrete Composite Girder Reinforcement Method by Additional Tensioning Material Settled on Branch Floor |
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| KR101470828B1 (en) * | 2013-01-30 | 2014-12-09 | 우경기술주식회사 | PSC U Girder bridge |
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| US7047704B1 (en) | 1999-10-08 | 2006-05-23 | Interconstec Co., Ltd. | Method for designing and fabricating multi-step tension prestressed girder |
| KR100374284B1 (en) * | 1999-12-10 | 2003-03-28 | 김우종 | A psc beam having above typed anchor blocks and connecting method thereof |
| KR20000063499A (en) * | 2000-07-18 | 2000-11-06 | 박창열 | Tension method of PS steel to improve bridge performance. |
| KR100403988B1 (en) * | 2000-07-27 | 2003-11-01 | 김진수 | Method for forming continuous p.s.c beams with steel plate girder splice and apparatus thereof |
| KR100456471B1 (en) * | 2000-09-28 | 2004-11-10 | 주식회사 인터컨스텍 | Open-type steel wire holding device and Metod for construction of continuous bridge using of prestressed concret beam having it |
| KR100420012B1 (en) * | 2001-03-07 | 2004-02-25 | 김진수 | Bridge using separately fabricated pre-stressed beams having different lengths and continuous construction method therefor |
| KR100500382B1 (en) * | 2002-10-17 | 2005-07-12 | 주식회사 삼표 | Construction method and connection structure for construction continuous of precast girder |
| KR20040049590A (en) * | 2002-12-06 | 2004-06-12 | 한국과학기술원 | Multiple Stage prestressed Girder |
| KR20030003200A (en) * | 2002-12-10 | 2003-01-09 | 원대연 | PC omitted |
| KR100691744B1 (en) * | 2004-04-12 | 2007-03-12 | 인하대학교 산학협력단 | Reinforcement Method of Continuous PS Concrete Composite Girder by Tension Material Extended to Deck Plate |
| KR100691848B1 (en) * | 2004-05-17 | 2007-03-12 | 인하대학교 산학협력단 | Continuous PS Concrete Composite Girder Reinforcement Method by Additional Tensioning Material Settled on Branch Floor |
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| KR100793158B1 (en) * | 2006-12-21 | 2008-01-10 | 주식회사 포스코 | Construction method of girder bridge with later-tension precast plate |
| KR101442189B1 (en) * | 2013-01-30 | 2014-09-22 | 우경기술주식회사 | PSC U girder bridge using segment girder |
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| CN110029566A (en) * | 2019-04-29 | 2019-07-19 | 中铁磁浮交通投资建设有限公司 | A kind of big box beam in the whole hole of medium-and low-speed maglev two-wire simple-supported thencontinuous and construction method |
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