CN101838970A - Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure - Google Patents

Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure Download PDF

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Publication number
CN101838970A
CN101838970A CN200910047664A CN200910047664A CN101838970A CN 101838970 A CN101838970 A CN 101838970A CN 200910047664 A CN200910047664 A CN 200910047664A CN 200910047664 A CN200910047664 A CN 200910047664A CN 101838970 A CN101838970 A CN 101838970A
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CN
China
Prior art keywords
steel
transversely strengthening
stretch
draw
finish rolling
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CN200910047664A
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Chinese (zh)
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CN101838970B (en
Inventor
张保和
刘耀武
李传平
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上海建泰预应力工程有限公司
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Priority to CN200910047664A priority Critical patent/CN101838970B/en
Publication of CN101838970A publication Critical patent/CN101838970A/en
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Publication of CN101838970B publication Critical patent/CN101838970B/en

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Abstract

The invention relates to a construction method for transversely strengthening a railway bridge by utilizing a prestressing steel structure. By adopting the prestressing steel structure for transversely strengthening, the defect that the traditional method affects the normal operation of a train is overcome; and by galvanizing steel members, filling a potting material and a structural adhesive to form three-layer anti-corrosive protection, smearing neutral grease on anchorage devices at two ends, and installing a protective nut cap, the whole structural system is enabled to have good durability. The invention has flexible, simple, and convenient construction and is a high-efficiency construction method.

Description

Use prestressed steel structure railroad bridge to be carried out worker's method of transversely strengthening
Technical field
The present invention relates to a kind of worker's method of using prestressed steel structure railroad bridge to be carried out transversely strengthening.
Background technology
Along with improving constantly and increase by gross weight of train running speed, the railroad bridge of building in early days is limited at that time design standard and construction level, lateral ties weakness between bridge beam body, beam body lateral stiffness is obviously not enough, can't satisfy the demand of Modern Traffic.Railway Bureau is to the bridge of this lateral stiffness deficiency, and traditional way is by planting reinforcing bar, a template, and concrete perfusion is reinforced by the pre-buried transverse prestressed reinforcing steel bar of stretch-draw at last.This method influences train in construction period normally to be moved, and particularly during the concrete setting, the current meeting of train causes concrete can't form due intensity, makes strengthening quality to guarantee.Therefore need a kind of train that do not influence badly and normally move, the transverse prestress of easy construction is reinforced new technology.
Summary of the invention
The objective of the invention is to overcome traditional transversely strengthening method and have the deficiency that has a strong impact on the normal operation of train, the invention provides a kind of brand-new transverse prestress reinforcing construction process, finely solved an above-mentioned difficult problem.
In order to realize the above-mentioned purpose of new technology, a kind of prestressed steel structure that uses of the present invention is as follows to the main construction sequence of worker's method that railroad bridge carries out transversely strengthening:
(1) batch production of cross binding steel member is made, and does anti-corrosion protection processing, the order of cold drawn level Four finish rolling deformed bar;
(2) in the design attitude boring of beam body transversely strengthening, the center line of two Pin beam holes is located along the same line about assurance;
(3) about cross binding steel member is installed between the two Pin beam holes, lateral supports inside is zinc-plated, fills the grouting material in it, and smears structure glue in cross binding steel component surface, protection steel member,
(4) cold drawn level Four finish rolling deformed bar is installed in seamless steel pipe, its both sides are installed support pad and nut respectively, prepare stretch-draw;
(5) in place at end installation stretch-draw connector, the stretch-draw spike of cold drawn level Four finish rolling deformed bar, the cold drawn level Four finish rolling deformed bar of jack tension is to designing stretching force, by the anchoring of stretch-draw end ground tackle;
(6) in seamless steel pipe, pour into neutral grease, protect cold drawn level Four finish rolling deformed bar;
(7) stretch-draw end ground tackle is smeared the neutral grease protection, and high density polyethylene (HDPE) protection block is installed, and the transversely strengthening construction is finished.
Described cross binding steel member is made up of U type channel-section steel, steel plate and seamless steel pipe; The pipe ancient piece of jade, round, flat and with a hole in its centre inside center that seamless steel pipe places two blocks of U type channel-section steels and two block plates to surround.
Beneficial effect of the present invention is to have overcome conventional method and had the deficiency that influences the normal operation of train by adopting prestressed steel structure to carry out transversely strengthening.Expect and three layers of anti-corrosion protection of structure glue by, filling perfusion zinc-plated the steel member; also can adopt pickling, zinc-plated, the double-deck rustproof paint protection of brushing; and the two ends ground tackle is smeared neutral grease protect block with installing, make the total system have good endurance quality.The present invention's flexible and convenient of constructing is a kind of high efficiency construction.
Description of drawings
Fig. 1, step (2) structural behavior sectional view
Fig. 2, step (3) structural behavior sectional view
A-A sectional view among Fig. 3, Fig. 2
Fig. 4, step (4) structural behavior sectional view
B-B sectional view among Fig. 5, Fig. 4
Fig. 6, step (5) structural behavior sectional view
Fig. 7, step (6) structural behavior sectional view
C-C sectional view among Fig. 8, Fig. 7
Fig. 9, step (7) structural behavior sectional view
The specific embodiment
Hereinafter will be further elaborated worker's method of the present invention in conjunction with the accompanying drawings.Prestressed steel structure transversely strengthening system of the present invention is made up of cross binding steel member, cold drawn level Four finish rolling deformed bar, neutral anticorrosion grease and high density polyethylene (HDPE) protection block.
In conjunction with the accompanying drawings, the present invention use prestressed steel structure to railroad bridge carry out transversely strengthening detailed step:
(1) 1 batch production of cross binding steel member is made, and does anti-corrosion protection processing, 2 order of cold drawn level Four finish rolling deformed bar; Described cross binding steel member 1 is by U type channel-section steel 15,16, and steel plate 17,18 and seamless steel pipe 12 are formed; The pipe ancient piece of jade, round, flat and with a hole in its centre inside center that seamless steel pipe 12 places U type channel-section steel 15,16 and steel plate 17,18 to surround;
(2) in the design attitude boring of beam body transversely strengthening, form hole 3,4, the center line of two Pin beam holes 3,4 is located along the same line about assurance;
(3) about cross binding steel member 1 is installed between the two Pin beam holes 3,4, cross binding steel member 1 is inner zinc-plated, fills the grouting material in it, and smears structure glue on cross binding steel member 1 surface, protection steel member;
(4) the cold drawn level Four finish rolling deformed bar 2 of installation, its both sides are installed support pad 5,6 and nut 7,8 respectively in seamless steel pipe 12, prepare stretch-draw;
(5) in place at end installation stretch-draw connector 9, the stretch-draw spike 10 of cold drawn level Four finish rolling deformed bar 2, the cold drawn level Four finish rolling deformed bar 2 of jack 11 stretch-draw is to the design stretching force, by the anchoring of stretch-draw end ground tackle;
(6) in seamless steel pipe 12, pour into neutral grease, protect cold drawn level Four finish rolling deformed bar 2;
(7) stretch-draw end ground tackle is smeared the neutral grease protection, and high density polyethylene (HDPE) protection block 13,14 is installed, and the transversely strengthening construction is finished.

Claims (4)

1. one kind is used prestressed steel structure that railroad bridge is carried out worker's method of transversely strengthening, it is characterized in that described worker's method comprises following steps:
(1) batch production of cross binding steel member is made, and does anti-corrosion protection processing, the order of cold drawn level Four finish rolling deformed bar;
(2) in the design attitude boring of beam body transversely strengthening, the center line of two Pin beam holes is located along the same line about assurance;
(3) about cross binding steel member is installed between the two Pin beam holes, lateral supports inside is zinc-plated, fills the grouting material in it, and smears structure glue in cross binding steel component surface, protection steel member,
(4) cold drawn level Four finish rolling deformed bar is installed in seamless steel pipe, its both sides are installed support pad and nut respectively, prepare stretch-draw;
(5) in place at end installation stretch-draw connector, the stretch-draw spike of cold drawn level Four finish rolling deformed bar, the cold drawn level Four finish rolling deformed bar of jack tension is to designing stretching force, by the anchoring of stretch-draw end ground tackle;
(6) in seamless steel pipe, pour into neutral grease, protect cold drawn level Four finish rolling deformed bar;
(7) stretch-draw end ground tackle is smeared the neutral grease protection, and high density polyethylene (HDPE) protection block is installed, and the transversely strengthening construction is finished.
2. use prestressed steel structure according to claim 1 carries out worker's method of transversely strengthening to railroad bridge, its feature also is: step (3) adopts the cross binding steel member with multi-layer anticorrosion protection to replace traditional bar planting concrete system, does not influence train in the work progress fully and normally moves; Perfusion neutral grease, step (7) stretch-draw end ground tackle are smeared neutral grease in step (6) seamless steel pipe, and the protective system of protection block is installed, and the transversely strengthening system has good endurance quality.
3. use prestressed steel structure according to claim 1 carries out worker's method of transversely strengthening to railroad bridge, and its feature also is: described cross binding steel member is made up of U type channel-section steel, steel plate and seamless steel pipe; The pipe ancient piece of jade, round, flat and with a hole in its centre inside center that seamless steel pipe places two blocks of channel-section steels of U type and two block plates to surround.
4. use prestressed steel structure according to claim 1 carries out worker's method of transversely strengthening to railroad bridge, and its feature also is: step (2) but in also pickling of cross binding steel member, zinc-plated and brush double-deck rustproof paint and protect.
CN200910047664A 2009-03-17 2009-03-17 Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure CN101838970B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910047664A CN101838970B (en) 2009-03-17 2009-03-17 Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure

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Application Number Priority Date Filing Date Title
CN200910047664A CN101838970B (en) 2009-03-17 2009-03-17 Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure

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CN101838970A true CN101838970A (en) 2010-09-22
CN101838970B CN101838970B (en) 2012-10-03

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587296A (en) * 2012-02-21 2012-07-18 朔黄铁路发展有限责任公司 Self-balancing external prestressing strengthening method for bridge structure
CN103216036A (en) * 2013-04-03 2013-07-24 哈尔滨工程大学 Bent-loading light-weight reinforced concrete beam structure
CN103290786A (en) * 2013-05-07 2013-09-11 北京交通大学 System and method for rapidly reinforcing railway bridge by external prestressing
CN105860412A (en) * 2016-04-27 2016-08-17 安徽中鼎橡塑制品有限公司 Halogen-free flame-retardant thermoplastic elastomer material for electric wires and cables and preparation method of material
CN106320189A (en) * 2016-08-30 2017-01-11 中铁四局集团第四工程有限公司 Transverse reinforcing construction method of existing railway line T beam

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2527608Y (en) * 2002-05-17 2002-12-25 胡战波 Prestressed large span solid web steel girder structure system
CN100587166C (en) * 2007-12-26 2010-02-03 中铁大桥局集团武汉桥梁科学研究院有限公司 External prestress strengthening method for prestressed concrete box-beam bridge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587296A (en) * 2012-02-21 2012-07-18 朔黄铁路发展有限责任公司 Self-balancing external prestressing strengthening method for bridge structure
CN102587296B (en) * 2012-02-21 2013-12-25 朔黄铁路发展有限责任公司 Self-balancing external prestressing strengthening method for bridge structure
CN103216036A (en) * 2013-04-03 2013-07-24 哈尔滨工程大学 Bent-loading light-weight reinforced concrete beam structure
CN103216036B (en) * 2013-04-03 2015-05-20 哈尔滨工程大学 Bent-loading light-weight reinforced concrete beam structure
CN103290786A (en) * 2013-05-07 2013-09-11 北京交通大学 System and method for rapidly reinforcing railway bridge by external prestressing
CN105860412A (en) * 2016-04-27 2016-08-17 安徽中鼎橡塑制品有限公司 Halogen-free flame-retardant thermoplastic elastomer material for electric wires and cables and preparation method of material
CN105860412B (en) * 2016-04-27 2019-03-12 安徽中鼎橡塑制品有限公司 Halogen-free flame retardant thermoplastic elastomer material and preparation method thereof for wire and cable
CN106320189A (en) * 2016-08-30 2017-01-11 中铁四局集团第四工程有限公司 Transverse reinforcing construction method of existing railway line T beam

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