CN101368366A - Cantilever beam external anchor stayed-cable bridge - Google Patents
Cantilever beam external anchor stayed-cable bridge Download PDFInfo
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- CN101368366A CN101368366A CNA2008101414210A CN200810141421A CN101368366A CN 101368366 A CN101368366 A CN 101368366A CN A2008101414210 A CNA2008101414210 A CN A2008101414210A CN 200810141421 A CN200810141421 A CN 200810141421A CN 101368366 A CN101368366 A CN 101368366A
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Abstract
The invention belongs to cable-stayed bridge field and relates to a cable-stayed bridge with the suspended girders externally anchored. The cable-stayed bridge is mainly characterized in that at least three stay cables are connected between each side of each unit girder and two adjacent cable towers; external anchorage cables are arranged on the two outmost cable towers. Compared with the current anchorage and connection mode of the cable-stayed bridge, the invention enables the girders to be stably suspended and pulled in the air, and interaction force among the unit girders is greatly weakened. The cable-stayed bridge can make use of the strength of the components thereof, thereby not only reducing material consumption and weight of the components like the girders but also increasing the span and height between the cable towers, which is good for choosing the bases for the cable towers according to landform and geology and good for developing navigation capacity.
Description
Technical field
The invention belongs to the building field, relate to cable stayed bridge, be specifically related to a kind of cantilever beam external anchor stayed-cable bridge.
Background technology
Cable stayed bridge is the important structure form of modern long span bridge beam, comprises Sarasota, suspension cable, girder, pier, every secondary Sarasota connect the girder of both sides by monosymmetric suspension cable, suspension cable has a lot of bars to disperse girder to give the power of suspension cable, and every side girder is subjected to the tractive from the suspension cable on the Sarasota.Though can realize from anchor, though the level of the pulling force of Sarasota both sides this Sarasota that suspension cable acts on is cancelled each other with level two component to the right left, but the load that Sarasota bore mainly is a girder, horizontal force is born by girder, girder on being supported on pier, also be supported on the suspension cable, because girder desolate and lonely tower in unit is far away more, be subjected to the horizontal component of pulling force of suspension cable just big more, Sarasota not only will bear the weight of girder and the weight of passing load, also to bear the significant horizontal component that suspension cable acts on girder, in order to increase span, improve intensity, in engineering, at first must increase thickness and the rugosity of Sarasota and the bar number of drag-line of girder, cause the bridge construction material to drop into expense cost and increase; It is can not desolate and lonely tower too far away that next limits girder, retrained span and height between two Sarasotas, selects for planning, exploration, design, Sarasota base position and constructing operation is brought difficulty, and it is unfavorable to bring for the long-range development and use of river course waterpower; Also have, when because unexpected burst accident causes certain unit girder to be subjected to being difficult to change this girder when badly damaged.
Summary of the invention
The designer is in social practice, find that existing cable stayed bridge exists certain defective, through investigation and analysis, explore repeatedly, existing cable stayed bridge suspension cable is involved mode to be improved, purpose is to design a kind of cantilever beam external anchor stayed-cable bridge, not only can reduce bridge material cost input, but also can strengthen span and height between the Sarasota.
The technical solution used in the present invention is a kind of cantilever beam external anchor stayed-cable bridge of design, its structure comprises: Sarasota, suspension cable, girder, every secondary Sarasota has three king-posts, and wherein two limit king-posts are erected at the girder both sides respectively, middle king-post is fixed on the position, middle and upper part between these two king-posts, every secondary middle part Sarasota is by the girder of suspension cable connection both sides, and wherein every segment unit girder involves suspension cable respectively and between the adjacent two secondary Sarasotas, anchor cable outside being provided with on two secondary Sarasotas of bridge outermost end.
For intensity is tiltedly drawn in further raising, increase the reliability of suspension cable, involve at least three skew cables between the both sides of described every segment unit girder and the adjacent two secondary Sarasotas, wherein one involves on the same side king-post of a secondary Sarasota, and two involve on two king-posts of another secondary Sarasota in addition; The intersection that the same side is guided between the formed plane of suspension cable of same king-post and the formed plane of suspension cable that the same side is guided another king-post into should be above the bridge face, the mutual gouging abrasion of suspension cable be can avoid like this, thereby the reliability and the life-span of suspension cable increased.
The present invention adopts technique scheme and measure, after the suspension cable of existing cable stayed bridge involved mode and improved, because every segment unit girder has from the suspension cable tractive on the two secondary Sarasotas, it is zero that suspension cable acts on that tension level component on the unit girder makes a concerted effort, not only every segment unit girder can shorten into as crossbeam, can stably be hanged by the suspension cable on both sides and be pulled in aerial appellation overarm, and it is steady relatively between the unit girder section, interaction force reduces significantly, can make full use of member self intensity, so girder only need bear own wt and passing load, can not increase the thickness and the weight of bridge member, even can reduce cable stayed bridge the member particularly materials and the weight of girder, save the bridge construction material, when bridging, can set up interim pier at the bridge center and close up, be convenient to construction;
Owing to adopt the two-way tractive one unit girder of three skew cables, the unit girder can not swung, so improved the stability of bridge face;
Owing to adopt above technical measures, under the situation that does not increase bridge member thickness intensity, the use less material can also strengthen span and the height between the two secondary Sarasotas, making the laying of bridge span not only be convenient to Sarasota base position selects flexibly in conjunction with the landform geological conditions, and be beneficial to the long-range development and use in river course, as allow high large vessel, many ships pass through.In addition when because contingency causes certain unit girder to be subjected to can changing this girder easily when badly damaged.
Description of drawings
Fig. 1 represents cantilever beam external anchor stayed-cable bridge structural representation of the present invention.
The specific embodiment
Reach embodiment in conjunction with the accompanying drawings, further specify the concrete structure of cantilever beam external anchor stayed-cable bridge of the present invention, its feature and advantage are clearer.
The embodiment 1 of cantilever beam external anchor stayed-cable bridge of the present invention, referring to Fig. 1, its structure comprises: Sarasota 1, suspension cable 2, girder 3, every secondary middle part Sarasota 1 is by the girder 3 of the suspension cable 2 connection both sides of both sides, and every segment unit girder 3.1 involves suspension cable respectively and between the adjacent two secondary Sarasotas 1,4, anchor cable 5 outside being provided with on two secondary Sarasotas 4 of outermost end is used for being connected with the ground anchor peg (not shown) of end of the bridge.
The embodiment 2 of cantilever beam external anchor stayed-cable bridge of the present invention, referring to Fig. 1, its structure comprises: in the structure of embodiment 1,2 at least three of the suspension cables that involves between described every segment unit girder 3.1 and the adjacent two secondary Sarasotas, wherein a skew cables 2.2 involves on the same side king-post of this unit girder secondary Sarasota far away, and in addition two skew cables 2.1 involve respectively on the middle king-post of the homonymy king-post of the nearer secondary Sarasota of this unit girder and this pair Sarasota.
The embodiment 3 of cantilever beam external anchor stayed-cable bridge of the present invention, referring to Fig. 1, its structure comprises: in the structure of embodiment 1, the intersection that girder 3.1 the same sides, described unit are guided between the formed plane of suspension cable of same king-post and the formed plane of suspension cable that the same side is guided another king-post into should be below girder 3, or in girder 3.
The bridge board of cantilever beam external anchor stayed-cable bridge of the present invention builds up an integral body or is welded into an integral body with steel plate except watering with steel concrete as the bridge board construction of traditional cable stayed bridge, also girder can be shortened into crossbeam as the tradition bridge construction, the suspension cable that stretches out with Sarasota has been reinforced crossbeam earlier, double tenon hair style case beam is placed on two adjacent crossbeams one by one again.The tenon base portion of double tenon hair style case beam is pressed on the crossbeam, and tenon surpasses the horizontal straight line of planar central on the crossbeam, and the effect of tenon is that the control crossbeam is not along the straight line rotation of crossing crossbeam two ends suspension cable fixed point.
Claims (2)
1. a cantilever beam external anchor stayed-cable bridge comprises Sarasota, suspension cable, girder, every secondary middle part Sarasota is characterized in that every segment unit girder involves suspension cable respectively and between the adjacent two secondary Sarasotas, anchor cable outside being provided with by the girder of suspension cable connection both sides on two secondary Sarasotas of bridge outermost end.
2. cantilever beam external anchor stayed-cable bridge as claimed in claim 1, it is characterized in that at least three of the suspension cables that involve respectively between the both sides of described every segment unit girder and the adjacent two secondary Sarasotas, wherein one involves on the same side king-post of a secondary Sarasota, and two involve on the same side king-post and middle king-post of another secondary Sarasota in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101414210A CN101368366A (en) | 2008-09-13 | 2008-09-13 | Cantilever beam external anchor stayed-cable bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101414210A CN101368366A (en) | 2008-09-13 | 2008-09-13 | Cantilever beam external anchor stayed-cable bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101368366A true CN101368366A (en) | 2009-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101414210A Pending CN101368366A (en) | 2008-09-13 | 2008-09-13 | Cantilever beam external anchor stayed-cable bridge |
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| CN (1) | CN101368366A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002910A (en) * | 2010-11-15 | 2011-04-06 | 湖南大学 | Cable support tower of cable load-bearing bridge |
| CN102061668A (en) * | 2010-12-21 | 2011-05-18 | 天津第七市政公路工程有限公司 | Vertical swiveling construction method of dual-steel-arch tower |
| CN103046458A (en) * | 2013-01-09 | 2013-04-17 | 陈洪凯 | Anchoring reinforced structure of overhung section for reinforced concrete pavement slab of highway along river |
| CN110373991A (en) * | 2019-07-02 | 2019-10-25 | 中铁二院工程集团有限责任公司 | A kind of raising large span stayed-cable bridge lateral stiffness construction |
-
2008
- 2008-09-13 CN CNA2008101414210A patent/CN101368366A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002910A (en) * | 2010-11-15 | 2011-04-06 | 湖南大学 | Cable support tower of cable load-bearing bridge |
| CN102002910B (en) * | 2010-11-15 | 2012-05-23 | 湖南大学 | Cable support tower of cable load-bearing bridge |
| CN102061668A (en) * | 2010-12-21 | 2011-05-18 | 天津第七市政公路工程有限公司 | Vertical swiveling construction method of dual-steel-arch tower |
| CN103046458A (en) * | 2013-01-09 | 2013-04-17 | 陈洪凯 | Anchoring reinforced structure of overhung section for reinforced concrete pavement slab of highway along river |
| CN103046458B (en) * | 2013-01-09 | 2014-11-26 | 陈洪凯 | Anchoring reinforced structure of overhung section for reinforced concrete pavement slab of highway along river |
| CN110373991A (en) * | 2019-07-02 | 2019-10-25 | 中铁二院工程集团有限责任公司 | A kind of raising large span stayed-cable bridge lateral stiffness construction |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090218 |