WO2003035982A1 - Poutre porteuse en beton precontraint et procede de fabrication - Google Patents

Poutre porteuse en beton precontraint et procede de fabrication Download PDF

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Publication number
WO2003035982A1
WO2003035982A1 PCT/CN2002/000463 CN0200463W WO03035982A1 WO 2003035982 A1 WO2003035982 A1 WO 2003035982A1 CN 0200463 W CN0200463 W CN 0200463W WO 03035982 A1 WO03035982 A1 WO 03035982A1
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WO
WIPO (PCT)
Prior art keywords
prestressed
track
track beam
top plate
post
Prior art date
Application number
PCT/CN2002/000463
Other languages
English (en)
Chinese (zh)
Inventor
Xiangming Wu
Zhong Wu
Tinzhu Ren
Original Assignee
Shanghai Maglev Transportation Development Co., Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Maglev Transportation Development Co., Ltd filed Critical Shanghai Maglev Transportation Development Co., Ltd
Publication of WO2003035982A1 publication Critical patent/WO2003035982A1/fr

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Classifications

    • 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
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B25/00—Tracks for special kinds of railways
    • E01B25/30—Tracks for magnetic suspension or levitation vehicles
    • E01B25/305—Rails or supporting constructions

Definitions

  • the invention relates to a running track of a rail vehicle, in particular to a prestressed track beam for high-speed rail transportation such as magnetic levitation and a manufacturing method thereof.
  • the maglev train is a high-speed delivery system. When running at high speed, it has extremely high precision requirements for the support structure, that is, the track structure.
  • the support structure that is, the track structure.
  • the track structure is required to have very strict deformation requirements under the action of train moving load, ambient temperature and long-term load.
  • the first-order natural frequency must be greater than 1.1 times the running speed of the vehicle to the span of the track structure.
  • train running systems such as maglev trains have imposed very strict accuracy requirements on the functional area of the track structure.
  • the functional area is located on the top and sides of the track structure, including the sliding surface on both sides of the top surface, the guide surfaces on both sides of the train, and the stator.
  • the accuracy requirements for the above three functional surfaces are all within 1mm or 1mm (0.4mm).
  • the track structure requirements of the maglev train system above determine that the track structure of the maglev train has a large difference from the conventional railway bridge or track structure.
  • the track structure that meets the technical requirements for the operation of the maglev train requires sufficient rigidity. Unlike a beam in the traditional sense, it is no longer a stress (internal force) control design, but a deformation control design. For such a large rigidity, cracks will appear in the reinforced concrete structure during normal operation, which reduces the stiffness of the beam and the span cannot be too large, so this structure is difficult to meet the requirements of magnetic levitation; although the steel structure is lighter, the deformation is easier to control However, it is a thin-walled structure.
  • the section that meets the rigidity requirements of the magnetic levitation track structure must be made large and the engineering cost is high.
  • the prestressed concrete structure has the advantages of high rigidity and the ability to adjust the deformation of each stage of construction through prestress. Rail transit, such as magnetic levitation, requires highly deformed rail structures.
  • the technical problem to be solved by the present invention is to provide a prestressed track beam and its manufacturing and installation method according to the prestress design to ensure that the track beam can always meet the deformation requirements of the magnetic suspension track beam.
  • the essence of the technical solution of the present invention is to control the axial compression state during each construction stage, and control the deformation of the track beam segment caused by the shrinkage and creep of the concrete to a small range.
  • the prestress is applied in three stages: one pre-tensioning method and two post-tensioning methods.
  • the prestressed track beam of the present invention includes a beam top plate, a beam bottom plate, and a beam web, which are characterized by:
  • a plurality of pre-tensioning methods of the axial center pretensioning method are respectively arranged in the beam top plate and the left and right parts of the beam bottom plate, so that the moments of the prestress of the upper and lower edges on the section center of gravity axis are equal, and the pretensioning method is ensured in all axial centers Axial compression of the full section under prestress.
  • the number of pre-tensioned prestressing beams is determined based on the calculation of variable loads, other variable loads, and construction loads.
  • a second post-tensioning prestressing beam is also set in each of the two webs of the track beam according to the second parabola to balance the weight of auxiliary facilities such as functional parts and the previously generated due to shrinkage and creep.
  • the internal force is applied with an equivalent load of the same weight as the accessory equipment such as functional parts during tensioning.
  • the top and bottom plates inside the curve should also be provided with transverse eccentric pretensioning prestressing beams, the number of which is determined based on the beam's own weight and the lateral bending moment generated by the weight of the attached equipment.
  • an external prestressing beam is also provided, that is, it is fixed on the top surface of the both sides of the beam floor of the cavity of the prestressed beam at about 1/4 span.
  • two polygonal external prestressed pipes pass through the steering device and the beam top plate for the external prestressed beam to pass through.
  • the anchoring ends of the external prestressed beam are located at the top surfaces of the two ends of the beam top plate.
  • the manufacturing method of the prestressed track beam of the present invention includes the following steps:
  • the ordinary clip group anchor system is used to tension the first post-tensioned prestressed beam passing through the bellows to balance the internal force generated by the unbalanced beam body's own weight due to the eccentric pre-tensioned prestressed beam.
  • the full section of the beam is under axial compression;
  • a lateral eccentric pretensioning prestressing beam should be set in the top and bottom plates at the inside of the curve at the same time.
  • an external prestressed pipe and a steering device are embedded.
  • Fig. 1 is a schematic diagram of a prestressed beam structure of a linear beam according to a first embodiment of the prestressed track beam of the present invention.
  • Fig. 2 is a schematic sectional structural view of a fulcrum of a linear beam according to the first embodiment of the prestressed track beam of the present invention.
  • Fig. 3 is a schematic diagram of a mid-span cross-section structure of a linear beam according to a first embodiment of the prestressed track beam of the present invention.
  • FIG. 4 is a schematic diagram of a prestressed cable structure of a curved beam according to a second embodiment of the prestressed track beam of the present invention.
  • Fig. 1 is a schematic diagram of a prestressed beam structure of a linear beam according to a first embodiment of the prestressed track beam of the present invention.
  • Fig. 2 is a schematic sectional structural view of a fulcrum of a linear beam according to the first embodiment of the prest
  • FIG. 5 is a schematic structural sectional view of a fulcrum of a curved beam according to a second embodiment of the prestressed track beam of the present invention.
  • Fig. 6 is a schematic diagram of the mid-section structure of a curved beam span of a prestressed track beam according to a second embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an external prestressed beam structure of a prestressed track beam of the present invention.
  • the prestressed track beam of the present invention includes a beam top plate 1, a beam bottom plate 2, and a beam web 3.
  • the characteristics are as follows: inside the track beam top plate 1 and the left portion 21 of the beam bottom plate 2.
  • a number of eccentric pretensioning prestressing beams 5 are set at the two parts of the right and the right part 22, and a number of eccentric pretensioning prestressing beams 6 are set at the middle part 20 of the track beam bottom plate 2;
  • a first post-tensioned prestressed beam 7 is arranged in each of the parabolic shapes, and a second post-tensioned prestressed beam 8 is arranged in each of the second parabolic shapes.
  • laterally eccentric pretensioned prestressed beams 9 should also be arranged in the top and bottom plates inside the curve, as shown in Figures 4, 5 and 6.
  • FIG. 7 is a schematic diagram of an external prestressed beam structure of a prestressed track beam of the present invention.
  • the present invention also includes an adjustable measure for long-term long-term deformation-an external prestressing beam.
  • FIG. 7 Four steering devices 24 are fixedly arranged on the top surface 23 on both sides of the beam bottom plate 2 of the cavity 4 of the prestressed track beam, and a total of four steering devices 24 are provided, two
  • the polygonal external prestressed pipe 25 passes through the steering device 24 and the top plate 1 for the external prestressed beam to pass through.
  • the anchoring ends 12 of the external prestressed beam are located at both ends of the beam top plate 1.
  • the external prestressed beam adopts a polygonal line shape, and the turning point is set at the steering device 24.
  • the prestressed track beam of the present invention can adjust the prestress at any time according to the actual needs to ensure the long-term good state of the prestressed track beam.
  • the manufacturing method of the prestressed track beam of the present invention is as described above, and is not repeated here.
  • a 24.685-meter concrete beam is provided with 57 beams of the axial pretensioning prestressing beam, of which 19 beams are in the beam top plate 1, 38 beams are in the beam bottom plate 2, and 12 beams are eccentric pretensioning prestressing beams.
  • M gQ 4298kN ⁇ m
  • M y2 — 945kN ⁇ m

Landscapes

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

Abstract

La présente invention concerne une poutre porteuse en béton précontraint pour système de transport rapide et le procédé de fabrication correspondant. Cette poutre est constituée d'une structure plane supérieure (1), d'une structure plane de base (2) et d'une structure verticale (3). On établit des faisceaux de précontrainte (5) à prétensionnement selon plusieurs axes sur le flanc droit et le flanc gauche (21, 22) respectivement de la structure plane supérieure (1) et de la structure plane de base (2). On établit plusieurs faisceaux de précontrainte excentriques (6) à prétensionnement au centre (20) de la structure plane de base (2). On établit un premier faisceau de précontrainte à retensionnement (7) et un deuxième faisceau de précontrainte à retensionnement (8) dans la zone en forme conico-parabolique au niveau des deux structures verticales (3). Enfin, on établit des faisceaux de précontrainte externes au niveau de la cavité (4) et de la structure plane supérieure (1). S'agissant de la poutre porteuse curviligne, on établit des faisceaux de précontrainte à prétensionnement excentrique transversal (9) au niveau de la structure plane supérieure (1) et de la structure plane de base (2) à l'intérieur de la courbe. A condition de conserver les axes de la poutre à l'état de compression pendant la construction et l'exploitation, on arrive à maintenir dans une plage inférieure à 1 mm la déformation de la poutre porteuse imputable au retrait du béton et à la réduction des fissures.
PCT/CN2002/000463 2001-10-26 2002-07-01 Poutre porteuse en beton precontraint et procede de fabrication WO2003035982A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN01132016A CN1128900C (zh) 2001-10-26 2001-10-26 预应力轨道梁及其制造方法
CN01132016.8 2001-10-26

Publications (1)

Publication Number Publication Date
WO2003035982A1 true WO2003035982A1 (fr) 2003-05-01

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Application Number Title Priority Date Filing Date
PCT/CN2002/000463 WO2003035982A1 (fr) 2001-10-26 2002-07-01 Poutre porteuse en beton precontraint et procede de fabrication

Country Status (3)

Country Link
CN (1) CN1128900C (fr)
HK (1) HK1045341B (fr)
WO (1) WO2003035982A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110295538A (zh) * 2019-07-29 2019-10-01 上海市城市建设设计研究总院（集团）有限公司 先张法超高性能混凝土组合梁及其施工方法
CN112507410A (zh) * 2019-08-30 2021-03-16 比亚迪股份有限公司 轨道梁图纸的生成方法和生成装置
CN113378255A (zh) * 2020-02-25 2021-09-10 比亚迪股份有限公司 一种曲线导轨梁的设计方法和曲线导轨梁

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101463590B (zh) * 2007-12-20 2010-09-01 中铁大桥勘测设计院有限公司 旧桥加固用体外预应力之钢结构锚固转向体系及加固方法
CN105672066B (zh) * 2015-11-10 2024-01-23 北京交通大学 一种改善悬挂式单轨交通中底板外伸组合箱型轨道梁受力状态的方法
CN105568787A (zh) * 2015-11-10 2016-05-11 北京交通大学 一种底板开口、顶板悬挂的混凝土轨道梁
CN106284098B (zh) * 2016-10-25 2018-03-20 薛秋香 一种先张法钢筋混凝土预应力桥板预拱度值控制方法
CN106836604B (zh) * 2017-02-07 2022-08-12 叶长青 大跨度斜屋面的制作方法
CN110387806B (zh) * 2019-07-31 2021-04-06 中交路桥北方工程有限公司 一种预应力梁板挠度变形控制方法
CN111663434B (zh) * 2020-05-13 2022-03-25 济南市市政工程设计研究院（集团）有限责任公司 混张预应力预制盖梁张拉组件、盖梁与立柱的连接方法
CN114808656B (zh) * 2022-05-27 2023-10-24 长江勘测规划设计研究有限责任公司 一种减小混凝土梁徐变挠度措施的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3244035A1 (de) * 1982-11-27 1984-05-30 Andrä, Wolfhart, Dr.-Ing., 7000 Stuttgart Abschnittsweise erneuerung von durchlauftraegern aus spannbeton
CN1168441A (zh) * 1997-05-30 1997-12-24 交通部第二公路勘察设计院 预应力扁锚竖直式锚固的混凝土箱梁及其制造方法
CN1313919A (zh) * 1999-08-09 2001-09-19 马克斯博革建筑有限公司 多跨支承梁体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3244035A1 (de) * 1982-11-27 1984-05-30 Andrä, Wolfhart, Dr.-Ing., 7000 Stuttgart Abschnittsweise erneuerung von durchlauftraegern aus spannbeton
CN1168441A (zh) * 1997-05-30 1997-12-24 交通部第二公路勘察设计院 预应力扁锚竖直式锚固的混凝土箱梁及其制造方法
CN1313919A (zh) * 1999-08-09 2001-09-19 马克斯博革建筑有限公司 多跨支承梁体

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110295538A (zh) * 2019-07-29 2019-10-01 上海市城市建设设计研究总院（集团）有限公司 先张法超高性能混凝土组合梁及其施工方法
CN112507410A (zh) * 2019-08-30 2021-03-16 比亚迪股份有限公司 轨道梁图纸的生成方法和生成装置
CN112507410B (zh) * 2019-08-30 2022-11-11 比亚迪股份有限公司 轨道梁图纸的生成方法和生成装置
CN113378255A (zh) * 2020-02-25 2021-09-10 比亚迪股份有限公司 一种曲线导轨梁的设计方法和曲线导轨梁

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Publication number Publication date
HK1045341B (zh) 2004-07-02
CN1344836A (zh) 2002-04-17
HK1045341A1 (en) 2002-11-22
CN1128900C (zh) 2003-11-26

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