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WO2011005049A2 - Poutre en béton armé précontraint et procédé de construction dans lequel on l'utilise - Google Patents

Poutre en béton armé précontraint et procédé de construction dans lequel on l'utilise Download PDF

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Publication number
WO2011005049A2
WO2011005049A2 PCT/KR2010/004476 KR2010004476W WO2011005049A2 WO 2011005049 A2 WO2011005049 A2 WO 2011005049A2 KR 2010004476 W KR2010004476 W KR 2010004476W WO 2011005049 A2 WO2011005049 A2 WO 2011005049A2
Authority
WO
WIPO (PCT)
Prior art keywords
fixing
girder
tension
steel
reinforced concrete
Prior art date
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.)
Ceased
Application number
PCT/KR2010/004476
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English (en)
Korean (ko)
Other versions
WO2011005049A3 (fr
Inventor
노윤근
박근화
노경범
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of WO2011005049A2 publication Critical patent/WO2011005049A2/fr
Publication of WO2011005049A3 publication Critical patent/WO2011005049A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/28—Concrete reinforced prestressed

Definitions

  • the present invention relates to a prestressed reinforced concrete girder and a construction method thereof.
  • prestressed reinforced concrete girders that have been introduced with reinforcement wires in reinforced concrete have a limit to the tension force that can introduce the stranded wires due to cracking due to tensile force on the upper part of the prestressed reinforced concrete girder when the tensioning force is introduced into the reinforcement wires.
  • the height of the prestressed reinforced concrete girder is increased while the interval of the prestressed reinforced concrete girder is shortened.
  • the bridge is unable to withstand the tensile force generated by the moment applied to the prestressed reinforced concrete girder over time, causing cracks in the bottom plate concrete of the parent portion, or cracks in the lower part of the prestressed reinforced concrete girder.
  • the bridge cannot fulfill its role as a bridge.
  • the bridge not only causes corrosion of reinforcing bars due to cracking, but also reduces the adhesion between concrete and reinforcing bars due to air pollution, thereby severely affecting the strength of prestressed reinforced concrete girder, reducing durability of bridges, and reinforcing reinforcement.
  • construction is difficult due to replacement of a floor plate or reinforcement of an external PC steel wire, and construction cost is too high.
  • the present invention has been made to solve the problems described above, in the continuous bridge of prestressed reinforced concrete girders, the side fixing blocks are fixed to both sides of the outer side of the outer section of the girder, the side fixing block, A pair of secondary tension combined tension fixing unit and a pair of reinforcing fixing unit are installed in the block, and side fixing blocks are fixed to both sides of the abdomen of the inner part of the outer span of the girder, and the repairing reinforcement is applied to the side fixing block.
  • Prestressed reinforced concrete girder for achieving the above object is a continuous bridge prestressed reinforced concrete girder, girder consisting of the upper, lower flange and the abdomen; Side fixing blocks protruding at both sides of the girder with a predetermined width and width; A secondary tension combined continuous fixing unit installed at the upper end of the side fixing block, respectively, for fixing secondary tension combined continuous tension, and fixing steel fittings, sheaths, and continuous PC steel wires;
  • the lower side lateral fixing block of the secondary tension combined tension fixing unit is characterized in that it is composed of a reinforcing reinforcing fixing unit installed without fixing the steel fixture and the PC steel wire, only the reinforcing reinforcing sheath.
  • the prestressed reinforced concrete girder according to the present invention for achieving the above object is a simple bridge prestressed reinforced concrete girder, girder consisting of the upper, lower flange and the abdomen; Side fixing blocks protruding at both sides of the girder with a predetermined width and width; A secondary tension fixing unit in which an upper portion of the side fixing block is provided with steel anchors and sheaths and sheaths and secondary tension PC steel wires respectively installed for secondary tension;
  • the lower side lateral fixing block of the secondary tension fixing unit is characterized in that it is composed of a fixing reinforcing fixing unit which is fixed to the reinforcing reinforcement sheath is not installed steel fittings and PC steel wire.
  • the prestressed reinforced concrete girder construction method according to the present invention for achieving the above object is a continuous bridge prestressed reinforced concrete girder construction method, the girder consisting of the upper, lower flange and abdomen; Side fixing blocks protruding at both sides of the girder with a predetermined width and width; A secondary tension combined tension fixing unit installed at the upper end of the side fixing block, respectively, for fixing the secondary tension combined continuous tension, and the steel anchoring hole, the sheath and the PC steel wire are fixed;
  • the outer side of the outer span of the prestressed reinforced concrete girder consisting of a reinforcing reinforcing fixing unit installed without fixing steel fittings and a PC steel wire to the lower side side fixing block of the secondary tension-use continuous tension fixing unit, but only a reinforcing reinforcing sheath is installed.
  • a pair of secondary tension sequencing tension fixing units and a pair of reinforcing fixing units are installed in the side fixing blocks on both sides of the partial abdomen, and the reinforcing fixing units are fixed to the side fixing blocks on both sides of the abdomen of the inner part of the girder's outer span.
  • a pair of parts is installed, and a pair of repair reinforcing fixing parts are installed on both sides of the inner side of the inner girder of the girder, and a pair of repair reinforcing fixing parts are installed on the side fixing blocks.
  • the prestressed reinforced concrete girder construction method according to the present invention for achieving the above object is a simple bridge prestressed reinforced concrete girder construction method, the girder consisting of the upper, lower flange and abdomen; Side fixing blocks protruding at both sides of the girder with a predetermined width and width; A secondary tension fixing unit in which an upper portion of the side fixing block is provided with steel anchors and sheaths and sheaths and secondary tension PC steel wires respectively installed for secondary tension;
  • the lower side side fixing block of the secondary tension fixing unit has side fixing parts on both sides of both ends of the prestressed reinforced concrete girder, which are composed of a fixing reinforcing fixing unit in which only steel fixing holes and PC steel wires are not installed and fixing sheaths are fixed.
  • the prestressed reinforced concrete girder and its construction method according to the present invention is fixed to the side fixing blocks on both sides of the abdomen of the outer portion of the girder outer girder, the secondary tension combined continuous tension fixing on the side fixing blocks A pair of parts and a pair of reinforcement fixing parts are installed, side fixing blocks are fixed to both sides of the abdomen of the inner part of the outer span of the girder, and a pair of reinforcing fixing parts is installed on the side fixing blocks.
  • the steel anchoring hole and PC steel wire are inserted in the maintenance reinforcement fixing part, and then additionally tensioned and repaired by the short span unit to increase the construction efficiency of continuity, It enables long spans, reduces reinforcement construction costs, facilitates construction, improves aesthetics, overcomes the mechanical limitations of low-rise, prestressed reinforced concrete girders that are difficult to reinforce long spans, and extends the service life as much as possible. There is an advantage to that.
  • FIG. 1 is a side view showing a short span prestressed reinforced concrete girder according to the present invention
  • FIG. 2 is a cross-sectional view taken along the line A-A of FIG.
  • FIG. 3 is a cross-sectional view taken along the line B-B of FIG.
  • FIG. 4 is a plan view showing a short span prestressed reinforced concrete girder according to the present invention
  • Figure 5 is a side view showing a two-span continuous bridge prestressed reinforced concrete girder according to the present invention
  • FIG. 6 is a cross-sectional view taken along the line A-A of FIG.
  • FIG. 7 is a cross-sectional view taken along the line B-B of FIG.
  • FIG. 8 is a cross-sectional view taken along the line C-C of FIG.
  • FIG. 9 is a side view showing a three-span continuous bridge prestressed reinforced concrete girder according to the present invention.
  • FIG. 10 is a cross-sectional view taken along the line A-A of FIG.
  • 11 is a cross-sectional view taken along the line B-B of FIG.
  • FIG. 13 is an enlarged detailed view of a portion “A” of FIG. 9;
  • FIG. 14 is an enlarged detailed view of a portion “B” of FIG. 9;
  • FIG. 16 is an enlarged detailed view of the line “A-A” in FIG. 13;
  • FIG. 1 is a side view showing a short span prestressed reinforced concrete girder according to the present invention
  • Figure 2 is a cross-sectional view taken along line AA of Figure 1
  • Figure 3 is a cross-sectional view taken along line BB of Figure 1
  • Figure 4 is a short-span prestress according to the present invention
  • 5 is a side view showing a two-span continuous bridge prestressed reinforced concrete girder according to the present invention
  • FIG. 6 is a sectional view taken along line AA of FIG. 5
  • FIG. 7 is a sectional view taken along line BB of FIG. 8 is a sectional view taken along line CC of FIG. 5, FIG.
  • FIG. 9 is a side view showing a three-span continuous bridge prestressed reinforced concrete girder according to the present invention
  • FIG. 10 is a sectional view taken along line AA of FIG. 9
  • FIG. 11 is a sectional view taken along line BB of FIG.
  • FIG. 12 is a cross-sectional view taken along line CC of FIG. 9
  • FIG. 13 is an enlarged view of portion "A” of FIG. 9
  • FIG. 14 is an enlarged view of portion "B” of FIG. 9, and FIG.
  • FIG. 16 is an enlarged detailed view showing the "AA" line in FIG. All.
  • the prestressed reinforced concrete girder in the continuous bridge prestressed reinforced concrete girder, the girder 10 consisting of the upper, lower flanges (12, 14) and the abdomen (16); Side fixing blocks 20 protruding at both sides of the girder 10 at a predetermined width and width; On the upper end of the side fixing block 20 is installed for the tension of the secondary tension combined serial tension PC steel wire 30, respectively, the steel fixture 44 and the sheath 42 and the secondary tension combined tension PC wire ( 30) fixed and installed secondary tension combined tension fixing unit 40;
  • the lower side side fixing block 20 of the secondary tension combined tension fixing unit 40 is not provided with the steel fittings 44 and the PC steel wire (30-1), only fixing the sheath 50 for the reinforcement reinforcement reinforcement It consists of a maintenance reinforcing fixing unit 60 is installed.
  • the prestressed reinforced concrete girder in the simple bridge prestressed reinforced concrete girder, the girder 10 consisting of the upper, lower flanges (12, 14) and the abdomen (16); Side fixing blocks 20 protruding at both sides of the girder 10 at a predetermined width and width; On the upper end of the side fixing block 20 is a steel anchoring hole 44 and secondary tension combined tension sheath 42-1 and secondary tension PC steel wire (30-1) are respectively installed for secondary tension A secondary tension fixing unit 40-1 fixedly installed;
  • the lower side fixing block 20 of the secondary tension fixing unit 40-1 is a fixing reinforcing fixing unit in which only the steel fixing fittings 44 and the PC steel wire are installed without fixing the sheath 50 for maintenance reinforcement. It consists of 60.
  • a pair of secondary tension sequential tension fixing unit 40 and a pair of reinforcing fixing unit 60 are installed on both sides of the outer side abdomen 16 of the outer section of the girder 10.
  • a pair of repair reinforcing fixing parts 60 are installed in the inner side of the inner portion of the outer portion of the girder 10 and the side surface fixing block 20 at both sides 16, and both ends of the inner portion of the girder 10 are provided. Both sides of the abdomen 16, the side fixing block 20 is provided with a pair of maintenance reinforcing fixing unit 60, respectively.
  • the side fixing block 20 is a concrete block of a rhombic shape on the basis of a plan view is installed on the abdomen 16 over the upper, lower flanges 12, 14 of the girder 10 to a predetermined thickness.
  • the reinforcing reinforcing fixing unit 60 has a concrete surface 48 formed of a steel fixture fitting form 46, and only the reinforcing reinforcing sheath 50 is inserted and fixed.
  • Prestressed reinforced concrete girder construction method is a continuous bridge prestressed reinforced concrete girder construction method, the girder 10 consisting of the upper, lower flanges (12, 14) and the abdomen (16); Side fixing blocks 20 protruding at both sides of the girder 10 at a predetermined width and width; On the upper end of the side fixing block 20 is installed for the tension of the secondary tension combined sequencing tension PC steel wire 30, respectively, the steel fixture 44 and the secondary tension sequencing tension sheath 42 and the secondary tension A secondary tension combined tension fixing unit 40 having a combined continuous tension PC steel wire 30 fixed thereto; The lower side fixing block 20 of the secondary tension combined tension fixing unit 40 is not provided with the steel fixing hole 44 and the PC steel wire, the maintenance reinforcement fixing fixed installed only the sheath 50 for maintenance reinforcement A pair of secondary tension sequencing tension fixing parts 40 in the side fixing blocks 20 on both sides of the outer portion of the outer portion of the outer span of the prestressed reinforced concrete girder 10 constituted by the portion 60 and repaired A pair of reinforcing
  • a pair of reinforcing reinforcing fixing parts 60 are respectively installed in the side fixing blocks 20 on both sides of both ends of the inner part of the girder 10 and the side abdomen 16, and the prestressed reinforced concrete girder 10 is installed.
  • the prestressed reinforced concrete girder construction method according to the present invention is a simple bridge prestressed reinforced concrete girder construction method, the girder 10 consisting of the upper, lower flanges (12, 14) and the abdomen (16); Side fixing blocks 20 protruding at both sides of the girder 10 at a predetermined width and width;
  • the upper portion of the side fixing block 20 is fixed to the steel fixtures 44 and secondary tension sheath 42-1 and secondary tension PC steel wire (30-1) are respectively installed for the secondary tension 2 A car tension fixing unit 40-1;
  • the lower side fixing block 20 of the secondary tension fixing unit 40-1 is not provided with steel fixing holes and PC steel wires, and the fixing reinforcement fixing unit 60 is fixed and installed only with the reinforcing sheath 50.
  • a side fixing block 20 is fixed to both sides of the abdominal both sides of the prestressed reinforced concrete girder 10 composed of a pair of secondary tension fixing units 40-1 at the upper end of the side fixing block 20.
  • the steel fixing fitting 44 is provided with a steel fitting fitting-shaped formwork 46 to pour and cure concrete, 46) to form the concrete surface 48 into which the steel fixture 44 is to be inserted, and if it is necessary to reinforcement in common, the steel fixture 44 is inserted into the concrete surface 48 and then epoxy Or after filling the clearance gap between the concrete surface 48 and the steel fittings 44 with the non-shrink mortar, the PC steel wire is inserted into the repair reinforcement tension.
  • the primary tension corresponds to the weight of the girder 10
  • the secondary tension combined sequential tension corresponds to the live load and at the same time the girder ( 10) can be realized by continuous bridges between low profile and long spans, and especially in the case of maintenance reinforcement during common use, if the statutory load condition is raised in the future, the load capacity decreases, or tensile cracking occurs in the girder 10,
  • it is the cheapest and simply effective reinforcement.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

La présente invention concerne une poutre en béton armé précontraint et un procédé de construction dans lequel on l'utilise. La poutre en béton armé précontraint comprenant: une poutre constituée d'une semelle supérieure et d'une semelle inférieure ainsi que d'une partie intermédiaire; des blocs d'ancrage de surface latérale qui dépassent d'une largeur prédéterminée et s'étendent à partir des deux surfaces latérales de la poutre; des parties d'ancrage utilisées pour la mise sous tension secondaire et pour renforcer la tension, qui sont prévues dans les parties d'extrémité supérieure des blocs d'ancrage de surface latérale afin de produire une tension secondaire et une tension renforcée et qui sont dotées d'un ancrage de sécurité en acier, d'une gaine et d'un câble en acier PC; et une partie d'ancrage pour la réparation et le renforcement qui est dotée d'une gaine de réparation et de renfort simplement et qui ne comprend pas d'ancrage en acier ni de câble en acier PC sur les blocs d'ancrage de surface latérale inférieure des parties d'ancrage utilisées pour une mise sous tension secondaire et pour renforcer la tension.
PCT/KR2010/004476 2009-07-10 2010-07-09 Poutre en béton armé précontraint et procédé de construction dans lequel on l'utilise Ceased WO2011005049A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090062899A KR100926969B1 (ko) 2009-07-10 2009-07-10 프리스트레스트 철근 콘크리트 거더 및 이의 시공방법
KR10-2009-0062899 2009-07-10

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WO2011005049A2 true WO2011005049A2 (fr) 2011-01-13
WO2011005049A3 WO2011005049A3 (fr) 2011-04-07

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WO (1) WO2011005049A2 (fr)

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CN108221508A (zh) * 2018-03-21 2018-06-29 成都市新筑路桥机械股份有限公司 一种集成式单轨梁端部预埋装置
CN108286220A (zh) * 2018-03-28 2018-07-17 中铁第四勘察设计院集团有限公司 一种斜拉桥混凝土箱梁三面压剪承载式索梁锚固结构
CN113021584A (zh) * 2021-03-04 2021-06-25 临沂市政集团有限公司 一种先张法预应力空心板伞撑拼片式芯模及其施工工艺
CN113431260A (zh) * 2021-06-30 2021-09-24 西藏藏建科技股份有限公司 一种基于钢绞线的大梁施工工艺
CN113981808A (zh) * 2021-12-14 2022-01-28 石家庄铁道大学 一种节段预制混凝土t型梁的结构及施工方法
CN114293486A (zh) * 2022-01-25 2022-04-08 杭州江润科技有限公司 预应力混凝土组合箱梁加固结构及施工方法
WO2023029647A1 (fr) * 2021-09-02 2023-03-09 中铁北京工程局集团第二工程有限公司 Procédé de construction de tendon d'acier de précontrainte super-long

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KR101208231B1 (ko) * 2010-08-23 2012-12-04 권오근 2차 긴장재를 활용한 복부 파형강판 피에스씨 거더의 연속 지점부 시공방법
KR101044469B1 (ko) 2010-09-06 2011-06-29 주식회사 오케이컨설턴트 돌출보가 부착된 프리스트레스트 콘크리트 거더
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KR100432494B1 (ko) 2001-09-07 2004-05-22 (주)스틸엔콘크리트 광폭의 ｐ.ｃ 거더 블록과, 이것을 이용한 교량의시공방법
KR100629905B1 (ko) 2004-08-24 2006-09-29 한국시설안전기술공단 기존 교량의 보강 시공방법 및 이 보강 시공방법으로제작된 교량

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Publication number Priority date Publication date Assignee Title
CN108221508A (zh) * 2018-03-21 2018-06-29 成都市新筑路桥机械股份有限公司 一种集成式单轨梁端部预埋装置
CN108286220A (zh) * 2018-03-28 2018-07-17 中铁第四勘察设计院集团有限公司 一种斜拉桥混凝土箱梁三面压剪承载式索梁锚固结构
CN108286220B (zh) * 2018-03-28 2023-11-10 中铁第四勘察设计院集团有限公司 一种斜拉桥混凝土箱梁三面压剪承载式索梁锚固结构
CN113021584A (zh) * 2021-03-04 2021-06-25 临沂市政集团有限公司 一种先张法预应力空心板伞撑拼片式芯模及其施工工艺
CN113431260A (zh) * 2021-06-30 2021-09-24 西藏藏建科技股份有限公司 一种基于钢绞线的大梁施工工艺
WO2023029647A1 (fr) * 2021-09-02 2023-03-09 中铁北京工程局集团第二工程有限公司 Procédé de construction de tendon d'acier de précontrainte super-long
CN113981808A (zh) * 2021-12-14 2022-01-28 石家庄铁道大学 一种节段预制混凝土t型梁的结构及施工方法
CN114293486A (zh) * 2022-01-25 2022-04-08 杭州江润科技有限公司 预应力混凝土组合箱梁加固结构及施工方法

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Publication number Publication date
WO2011005049A3 (fr) 2011-04-07
KR100926969B1 (ko) 2009-11-17

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