CN103882801B - The section assembling formula highway and railway bi-purpose cable-stayed bridge girder public, railway deck width is inconsistent - Google Patents

The section assembling formula highway and railway bi-purpose cable-stayed bridge girder public, railway deck width is inconsistent Download PDF

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Publication number
CN103882801B
CN103882801B CN201410128805.4A CN201410128805A CN103882801B CN 103882801 B CN103882801 B CN 103882801B CN 201410128805 A CN201410128805 A CN 201410128805A CN 103882801 B CN103882801 B CN 103882801B
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China
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chord
truss
sub
railway
bridge
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CN201410128805.4A
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Chinese (zh)
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CN103882801A (en
Inventor
康晋
徐伟
赵兴亚
段雪炜
孙英杰
颜兆福
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中铁大桥勘测设计院集团有限公司
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Abstract

The present invention relates to the section assembling formula highway and railway bi-purpose cable-stayed bridge girder form that a kind of public affairs, railway deck width are inconsistent, girder is made up of main truss, secondary purlin, highway bridge and railway deck.Upper layer bridge face width, lower floor's bridge floor is narrow, and main truss width is determined by railway deck, and secondary purlin width by road bridge floor is determined.Main truss lower edge hangs the strut of support both sides highway bridge outward; Wind up and jointly form secondary purlin with strut in secondary purlin.Drag-line is anchored on secondary purlin winds up by anchor tie plate; Highway bridge winds up with main truss, wind up and weld in secondary purlin; Railway deck welds with main truss lower edge.The wing plate upper and lower side of secondary girder stay bar winds up with secondary purlin respectively and main truss lower edge welds.The web winded up in secondary purlin is identical with the wing plate inclination angle of secondary girder stay bar.Simple structure of the present invention, cost economic, stressedly clear and definite directly adopt whole sections welding manufacture in factory, the whole section assembling erection of building-site, in the adverse circumstances of straits, difficulty of construction reduces greatly, and the present invention adopts at straits, Pingtan highway and railway bi-purpose cable-stayed bridge.

Description

The section assembling formula highway and railway bi-purpose cable-stayed bridge girder public, railway deck width is inconsistent

Technical field

The present invention relates to the spliced highway and railway bi-purpose cable-stayed bridge girder of sections that a kind of public affairs, railway deck width are inconsistent.

Background technology

Though traditional combined bridge bridge deck width highway bridge is wider, but different widths is little, can choose arm, widens the form of structure of lower floor's bridge floor and realize by oblique main truss, the band that winds up.And and that railway deck narrower bridge wider for highway bridge, adopt traditional structure not easily to realize.Traditional steel truss girder adopts in single rod member factory and manufactures, and building site is assembled by root rod member, and site work amount is large, and the duration is by effect of natural conditions.

Straits, Pingtan, good fortune black iron road, Fujian non-major P.E.subject is highway and railway bi-purpose cable-stayed bridge, wherein upper layer bridge face width 38m, the wide 15m of lower floor's bridge floor.As adopted oblique main truss, main truss inclination angle will reach 55 degree, for structure stress and Construction treatment all very unfavorable; As the form adopting upper chord band to choose arm, choosing brachium will reach 12m, and suspension cable can only be arranged on and chooses arm end, its rigidity and stressedly all cannot meet instructions for use; Widen lower floor's bridge floor as adopted and then significantly increase engineering quantity, economical not.

Residing for the bridge of Pingtan, waves whipped up by the wind rolled turbulently throughout the year for bridge location, as adopted traditional Steel truss structure, assembled by root rod member, and limit by field condition, the duration cannot ensure.Therefore the combined bridge main beam structure designing a kind of reasonable stress, simple structure, cost economic, constructability and late maintaining is needed.

Summary of the invention

The object of the invention is for above-mentioned present situation, aim to provide a kind of reasonable stress, simple structure, cost economic, constructability and late maintaining, be suitable for upper and lower two-layer bridge floor difference comparatively large, bridge location place bad environments and possess the inconsistent spliced highway and railway bi-purpose cable-stayed bridge girder of sections of the public affairs of large segmental construction condition, railway deck width.

The implementation of object of the present invention is, the highway and railway bi-purpose cable-stayed bridge girder public, railway deck width is inconsistent, upper strata is highway bridge, lower floor is railway deck, public, railway deck is cross bridge floor board, and girder is made up of main couple, sub-truss, upper strata highway bridge and lower floor's railway deck; Upper strata road bridge face width, lower floor's railway deck is narrow, and the width of main couple is determined according to railway deck width, and the width of sub-truss is determined according to highway bridge width;

From main couple lower chord, hang the sub-truss strut of support both sides highway bridge; Sub-truss upper chord and sub-truss strut form sub-truss jointly; Suspension cable is anchored on sub-truss upper chord top board by anchor tie plate;

Highway bridge top board welds with main couple upper chord top board, sub-truss upper chord top board, and highway bridge crossbeam welds with main couple upper chord riser and sub-truss upper chord riser; Railway deck top board welds with main couple lower chord top board, and railway deck crossbeam welds with main couple lower chord riser; Align with the top board of main couple lower chord and base plate and weld in the wing plate lower end of sub-truss strut; Align with the web of sub-truss upper chord and weld in wing plate upper end; The web upper and lower side of sub-truss strut " work " tee section aligns with sub-truss upper chord dividing plate and main couple lower chord dividing plate respectively and welds; The web of sub-truss upper chord is identical with the wing plate inclination angle of sub-truss strut.

Girder of the present invention adopts whole sections welding manufacture in factory, and the whole section assembling erection of building-site, the more traditional main beam structure of site work amount reduces greatly, effectively can ensure the construction period in the rugged environment of straits, reduces difficulty of construction.

Simple structure of the present invention, cost economic, stressed clear and definite directly constructability and late maintaining, be suitable for upper and lower two-layer bridge floor difference comparatively large, bridge location place bad environments and possess the highway and railway bi-purpose cable-stayed bridge main beam structure of large segmental construction condition.

The present invention adopts at Nanping Prefecture straits highway and railway bi-purpose cable-stayed bridge, achieves and well uses effect.

Accompanying drawing explanation

Fig. 1 is the profile of the present invention along direction across bridge;

Fig. 2 be the present invention along main couple indulge bridge to constructional drawing;

Fig. 3 be the present invention along sub-truss indulge bridge to constructional drawing;

Fig. 4 is suspension cable anchor tie plate of the present invention and sub-truss upper chord connection diagram;

Fig. 5 is main couple upper chord connection diagram of the present invention;

Fig. 6 is sub-truss strut of the present invention and main couple lower chord connection diagram.

Detailed description of the invention

With reference to Fig. 1-6, sections of the present invention spliced highway and railway bi-purpose cable-stayed bridge bridge girder structure by road bridge deck 1, railway deck system 2, main couple upper chord 3, main couple lower chord 4, main couple montant 5, main couple brace 9, sub-truss strut 6, sub-truss upper chord 7 and suspension cable anchor tie plate 8 forms.Between each parts all in factory by being welded to connect.

Upper strata of the present invention is highway bridge, and lower floor is railway deck, and public, railway deck is cross bridge floor board, and highway bridge 1 is wide, and railway deck 2 is narrow, hangs the sub-truss strut 6 of support both sides highway outside lower chord.Main couple is made up of main truss upper chord 3, main couple lower chord 4, main couple montant 5 and main couple brace 9, and sub-truss is made up of sub-truss upper chord 7 and sub-truss strut 6.Main couple upper chord 3, main couple lower chord 4 cross section are rectangular box cross section, and sub-truss upper chord 7 cross section is parallelogram case cross section.Sub-truss strut 6 is " work " tee section strut.

The width of main couple is determined according to railway deck width, and the width of sub-truss is determined according to public bridge deck width.Highway bridge top board welds with main couple upper chord top board 13, sub-truss upper chord top board 10; Highway bridge crossbeam top board welds with main couple upper chord top board 13 and sub-truss upper chord top board 10.Highway bridge cantilever diaphragm and base plate weld with main couple upper chord riser 14 and sub-truss upper chord riser 11.Railway deck top board welds with main couple lower chord top board 15, and railway deck cantilever diaphragm welds with main couple lower chord riser 16 with base plate.

Align with the top board 15 of main couple lower chord 4 and base plate 14 and be welded on riser 16 in two pieces of wing plate 12 lower ends of " work " tee section of sub-truss strut 6; Align with the riser 11 of sub-truss upper chord 7 and weld in wing plate 12 upper end; Align with the riser 11 of sub-truss upper chord 7 and weld in wing plate 12 upper end; Web 17 upper and lower side of sub-truss strut " work " tee section aligns with sub-truss upper chord dividing plate 18 and main couple lower chord dividing plate 19 respectively and welds.The riser 11 of sub-truss upper chord 7 is identical with wing plate 12 inclination angle of sub-truss strut 6.

Girder adopts whole sections welding manufacture in factory, and the whole section assembling erection in building site, splice point is main couple upper chord 3, main couple lower chord 4 and main couple brace 9.Main couple, sub-truss are being connected by high-strength bolt at the construction field (site); Highway bridge system and railway deck system scene are connected by welding manner.

Reasonable stress of the present invention, simple structure, cost economic, constructability and late maintaining, be suitable for upper and lower two-layer bridge floor difference comparatively large, bridge location place bad environments and possess the highway and railway bi-purpose cable-stayed bridge main beam structure of large segmental construction condition.

The present invention adopts at Nanping Prefecture straits highway and railway bi-purpose cable-stayed bridge, achieves and well uses effect.

Claims (4)

1. the section assembling formula highway and railway bi-purpose cable-stayed bridge girder that public, railway deck width is inconsistent, upper strata is highway bridge, lower floor is railway deck, public, railway deck is cross bridge floor board, it is characterized in that girder is made up of main couple, sub-truss, upper strata highway bridge and lower floor's railway deck; Upper strata road bridge face width, lower floor's railway deck is narrow, and the width of main couple is determined according to railway deck width, and the width of sub-truss is determined according to highway bridge width;
From main couple lower chord, hang the sub-truss strut of support both sides highway bridge; Sub-truss upper chord and sub-truss strut form sub-truss jointly; Suspension cable is anchored on sub-truss upper chord top board by anchor tie plate;
Highway bridge top board welds with main couple upper chord top board, sub-truss upper chord top board, and highway bridge crossbeam welds with main couple upper chord riser and sub-truss upper chord riser; Railway deck top board welds with main couple lower chord top board, and railway deck crossbeam welds with main couple lower chord riser; Align with the top board of main couple lower chord and base plate and weld in the wing plate lower end of sub-truss strut; Align with the web of sub-truss upper chord and weld in wing plate upper end; The web upper and lower side of sub-truss strut " work " tee section aligns with sub-truss upper chord dividing plate and main couple lower chord dividing plate respectively and welds; The web of sub-truss upper chord is identical with the wing plate inclination angle of sub-truss strut.
2. the section assembling formula highway and railway bi-purpose cable-stayed bridge girder that public affairs according to claim 1, railway deck width are inconsistent, it is characterized in that main couple upper chord (3), main couple lower chord (4) cross section is rectangular box cross section, sub-truss upper chord (7) cross section is parallelogram case cross section, and sub-truss strut (6) is " work " tee section strut.
3. the section assembling formula highway and railway bi-purpose cable-stayed bridge girder that public affairs according to claim 1, railway deck width are inconsistent, is characterized in that aliging with the top board (15) of main couple lower chord (4) and base plate (14) in two pieces of wing plate (12) lower ends of " work " tee section of sub-truss strut (6) and is welded on riser (16); Align with the riser (11) of sub-truss upper chord (7) and weld in wing plate (12) upper end; Web (17) upper and lower side of sub-truss strut " work " tee section aligns with sub-truss upper chord dividing plate (18) and main couple lower chord dividing plate (19) respectively and welds; The riser (11) of sub-truss upper chord (7) is identical with wing plate (12) inclination angle of sub-truss strut (6).
4. the section assembling formula highway and railway bi-purpose cable-stayed bridge girder that public affairs according to claim 1, railway deck width are inconsistent, it is characterized in that this girder adopts whole sections welding manufacture in factory, the whole section assembling erection in building site, splice point is main couple upper chord (3), main couple lower chord (4) and main couple brace (9); Main couple, sub-truss are connected by high-strength bolt at the construction field (site); Highway and railway deck system scene are connected by welding manner.
CN201410128805.4A 2014-04-01 2014-04-01 The section assembling formula highway and railway bi-purpose cable-stayed bridge girder public, railway deck width is inconsistent CN103882801B (en)

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CN104652246B (en) * 2015-02-13 2016-06-15 中铁第四勘察设计院集团有限公司 The board-like Steel-Concrete Composite Sections cable-stayed bridge main-beam of sandwich
CN105113382B (en) * 2015-05-21 2017-03-01 中铁大桥勘测设计院集团有限公司 The double web attachment structure of steel truss diagonal brace with secondary purlin
CN106149539B (en) * 2016-07-08 2018-08-14 中铁二院工程集团有限责任公司 The dual-purpose bridge staggered floor main beam section construction of highway-railway
CN107476181A (en) * 2017-08-30 2017-12-15 中铁大桥勘测设计院集团有限公司 Cable-stayed bridge and its construction method are anchored outside a kind of combined purlin
CN109024267B (en) * 2018-07-04 2020-07-21 中铁大桥勘测设计院集团有限公司 Steel truss girder structure of curved bridge floor
CN110373989A (en) * 2019-07-22 2019-10-25 中铁大桥局集团有限公司 A kind of whole segment manufacturing method of non-major P.E.subject steel truss girder closure section

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