CN102154990B - Electing method for side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge - Google Patents
Electing method for side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge Download PDFInfo
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- CN102154990B CN102154990B CN 201110123691 CN201110123691A CN102154990B CN 102154990 B CN102154990 B CN 102154990B CN 201110123691 CN201110123691 CN 201110123691 CN 201110123691 A CN201110123691 A CN 201110123691A CN 102154990 B CN102154990 B CN 102154990B
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Abstract
The invention discloses an electing method for a side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge, which belongs to the erection field of the suspension bridge. In order to solve the problem of safety risk existing in the erection process of the existing side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge and in a temporary consolidation dismantling and horizontal force conversion process, the electing method comprises the following steps of: (1) forming a cable-stayed bridge of a middle tower and a girder suspended by a side tower; (2) closing the girder; (3) erecting a side tower cable lifting system; (4) dismantling a suspension section support; (5) adjusting a cable-stayed backstay, a suspension cable and a cable-stayed bridge; and (6) finishing the bridge. In the electing method, the construction working procedure of construction and dismantling of the temporary consolidation between the side tower and the girder is cancelled and the construction working procedure of ''side tower cable lifting system erection'' is carried out after all closure openings of are closed, thereby shortening the construction period, saving material consumption and cost of machinery one-shift and avoiding security caused by removing the temporary consolidation bearing strong horizontal force.
Description
Technical field
The present invention relates to the field of setting up of cable bridge, be specially the suspention of a kind of end bay-in stride tiltedly draw temporary consolidation setting between three tower self-anchoring types combination cable bridge limit tower and the girder, rationally close up, the overall job practices of system conversion and safe Cheng Qiao.
Background technology
Along with progress of science and technology and high speed development of national economy, various bridges multiple functional, handsome in appearance build up in a large number.End bay suspention-in stride and tiltedly draw three tower self-anchoring types combination cable bridge
[1]Novel structure, unique, the linear smooth grace of moulding, both self-anchored suspension bridge had higher wind resisting stability relatively
[2-3], cable stayed bridge has reduced middle tower height degree relatively again, has both many advantages of self-anchored suspension bridge and cable stayed bridge
[1] [4], be a kind of brand-new structural system.
End bay suspention-in stride between the limit tower that tiltedly draws three tower self-anchoring types combination cable bridge and the girder and often adopt vertical support; But not be fixedly connected; Be fixedly connected and often be adopted as between middle tower and the girder; So both can reduce contraction, creep and the inferior internal force of the bridge construction system that temperature causes, can suitably reduce bearing quantity and bearing maintenance workload again.
End bay suspention-in stride and tiltedly draw three tower self-anchoring types combination cable bridge, also can claim " limit tower crane draw-middle tower tiltedly draw three tower self-anchoring types combination cable bridge ", its limit tower crane pull portion bridge construction is the same with common self-anchored suspension bridge, general operation construction by " cable behind the first beam ".According to the characteristics of this bridge type, the girder that the limit tower crane draws need adopt the mode of support cast-in-place, support assembly unit or incremental launching positioning to construct.Because the limit tower crane draws the support of girder or interim pier to set up completion at main push-towing rope; And stretch-draw could be removed after tiltedly drawing the conversion of dorsal funciculus and hoist cable realization system; Thereby this support or interim pier construction survival time are longer, often need experience flood season; For this reason, must adopt an effective measure and guarantee support or interim pier safety in the flood season.The girder of middle pylon cable-stayed bridge then can adopt the job practices of conventional cable stayed bridge; Job practices construction like support cast-in-place, Hanging Basket cantilever or cantilever; In order to reduce the flood season current obstruction area, remove the girder support of cable stayed bridge part or adopt non-stand construction method to construct before should arriving in the flood season.
Remove the local job practices of above-mentioned bridge; Refer to outside the job practices of girder itself; As illustrated in fig. 1 and 2, the conventional overall job practices of this kind bridge is: at first make the tiltedly independent separately Cheng Qiao of the section of drawing of limit tower crane section of drawing and middle tower, comprise the construction of cable crane system; Wherein between Bian Ta and the girder temporary consolidation must be set, just can carry out limit tower cable crane system construction after being provided with; The closure segment of constructing again closes up girder; Close up the back and remove temporary consolidation between limit tower and girder, the conversion of completion system; Carry out bridge floor and accessory structure construction etc. at last.
In the above-mentioned existing overall job practices; Before limit tower cable crane system sets up, tiltedly draws dorsal funciculus and hoist cable stretch-draw; Why temporary consolidation is set between limit tower and the girder; This be because with tower both sides girder section on one side in stride and need bear main push-towing rope 6, hoist cable 7 before closing up, tiltedly draw dorsal funciculus 8 to pass to the horizontal component of girder 12; The difference of its horizontal component, or claim that uneven horizontal force (maybe be bigger) can not look to being born by falsework, and need be passed to limit tower 4 through the temporary consolidation measure.Stride in shown in Figure 2 that 4 constructions of limit tower, limit tower crane straining beam section before closing up built, the construction of tower beam temporary consolidation, main push-towing rope set up, tiltedly draw processes such as dorsal funciculus and hoist cable stretch-draw, shown in Fig. 2 (d), is designated hereinafter simply as " the independent Cheng Qiao of limit tower crane straining beam section " process.In " the independent Cheng Qiao of limit tower crane straining beam section " process; Along with the cable crane system; Comprise main push-towing rope, tiltedly draw setting up of dorsal funciculus and hoist cable; With the difference that tower both sides, one side girder section bears horizontal force component, promptly uneven horizontal component will build up, and be delivered to Bian Tashang through the temporary consolidation between the tower beam.Calculating by West 2nd Ring Road, Hanzhong bridge shows, strides the footpath and suspends section in midair for the end bay about 100m, and the uneven horizontal force that single king-post bears can be accumulated to more than 2000 ton.
This shows; The above limit tower section of temporary consolidation and temporary consolidation will bear huge horizontal force before " the independent Cheng Qiao of limit tower crane straining beam section " back, system conversion; Limit tower section below the temporary consolidation does not then bear the horizontal force that the cable crane system causes; Because in the interim system of bridge that forms, with respect to this cross section, the stretch-draw of cable crane system is internal force with transferring rope.
In the above-mentioned existing overall job practices, girder closes up, and after bridge vertically is linked to be integral body, needs to remove the temporary consolidation measure between the tower beam.Remove the temporary consolidation measure of bearing significant horizontal power between the tower beam; Must consider the very strong driving force percussion of temporary consolidation measure catastrophic failure and the structural safety of demolishing process; Therefore before removing temporary consolidation, need the horizontal force that temporary consolidation bears is transferred on the jack, pass through jack emission levels power step by step after temporary consolidation is removed again; So that on the girder of striding during this horizontal force transferred to, and balance each other with horizontal force that opposite side transmits.Obviously, this temporary consolidation is removed the jack that not only needs numerous quantity with the horizontal force transfer process, and the operating process time is long, requirement is high, program is complicated, also has certain security risk.
Summary of the invention
For overcome the suspention of existing end bay-in stride and tiltedly draw three tower self-anchoring type synthetic rope crane span structures to establish in the process temporary consolidation to remove the jack that not only needs numerous quantity with the horizontal force transfer process; And the operating process time is long, requirement is high, program is complicated; The deficiency that also has certain security risk; The present invention aim to provide the suspention of a kind of end bay-in stride the erection method that tiltedly draws three tower self-anchoring types combination cable bridge; This erection method has been cancelled the working procedure that temporary consolidation is constructed and removed between limit tower and girder; And the working procedure of " limit tower cable crane system sets up " is moved to girder all close up mouth and carry out after closing up, therefore shortened the duration, practiced thrift material and expended with mechanical one-shift and expend; Avoided removing the security risk that temporary consolidation brought of bearing powerful horizontal force, in guaranteeing again pylon cable-stayed bridge girder rack construction survival time and limit tower crane draw the support of girder or temporarily on the pier survival time theory no longer than existing overall job practices.
To achieve these goals, the technical scheme that the present invention adopted is: the suspention of said end bay-in stride the erection method that tiltedly draws three tower self-anchoring types combination cable bridge, its comprise the steps into,
1. the cable stayed bridge of tower forms the girder that the limit tower crane draws in forming;
2. close up girder;
3. set up limit tower cable crane system;
4. remove the suspention section support or the interim pier of Bian Ta both sides girder;
5. dorsal funciculus, hoist cable, cable stayed bridge are tiltedly drawn in adjustment;
6. Cheng Qiao.
Further, said in pylon cable-stayed bridge form in the step, the generation type of girder is preferably cast-in-place or cantilever construction on the oblique section of drawing support.
The generation type of the girder that said limit tower crane draws is preferably on suspention section support or interim pier and builds or incremental launching positioning.
Said limit tower cable crane system comprises main push-towing rope, tiltedly draws dorsal funciculus and hoist cable.
Further, when girder adopted tiltedly the section of drawing rack construction, behind the pylon cable-stayed bridge, tower tiltedly drew the tiltedly section of the drawing support of girder in the dismounting, closes up girder again in formation.
Suspending section support or interim pier in midair and the closure segment support that supports girder tiltedly being installed between the section of the drawing support, can improve the stability of main girder construction, after setting up limit tower cable crane system, promptly dismountable this closure segment support.
By said structure; The critical process that the present invention cancels limit tower and girder temporary consolidation is: the working procedure of " limit tower cable crane system sets up " is moved to after girder closes up, and tower bore during the uneven horizontal force that the construction middle girder possibly born reached through the permanent measure of rigidly connecting between middle tower and the girder.
Compare with existing erection method; Numerical Simulation Analysis calculating to work progress shows with test; Construct according to scheme provided by the invention, when then becoming the bridge state internal force state of linear and each member of full-bridge and with the mechanical characteristic of this bridge under mobile load effect operation stage and correlated results basically identical according to routine construction gained.The present invention has simplified working procedure; Do not need on the limit Tata beam intersection to take the temporary consolidation measure; Thereby the work such as design, construction and unloading of having saved temporary consolidation, practiced thrift duration and cost greatly, and the safety problem of avoiding the uneven horizontal force unloading of temporary consolidation measure to occur.Comprehensively, economical, efficiently solved the end bay suspention-in stride draw tiltedly that three tower self-anchoring type synthetic rope bridge construction support safety are passed the flood period, girder rationally closes up, the difficult problem of completion system conversion and safe Cheng Qiao.
Compared with prior art; The invention has the beneficial effects as follows: the present invention had both cancelled temporary consolidation construction and the operation of removing between the tower beam; Shortened the duration; Practiced thrift material and expended with mechanical one-shift and expend, avoided removing the security risk that temporary consolidation brought of bearing powerful horizontal force, in guaranteeing again pylon cable-stayed bridge girder rack construction survival time (when rack construction being arranged) and limit tower crane like employing draw the support of girder or temporarily on the pier survival time theory no longer than existing overall job practices.Thereby; Job practices provided by the invention has been simplified working procedure; Shortened the construction period, practiced thrift that material expends and the mechanical one-shifts such as jack that are used to discharge huge uneven horizontal force expend, reduced and removed the security risk that the temporary consolidation measure of bearing significant horizontal power brings.
It is estimated, for the suspention of about 1000 meters of bridge lengths-in stride and tiltedly draw three tower self-anchoring types combination cable bridge, adopt job practices provided by the invention, with 2 months reductions of erection time, practice thrift 1200 machine-teams of jack, obtain the significant social economic benefit.
Below in conjunction with accompanying drawing and embodiment the present invention is done further elaboration.
Description of drawings
Fig. 1 be existing end bay suspention-in stride the flow chart that tiltedly draws three tower self-anchoring type synthetic rope bridge construction methods;
Fig. 2 be existing end bay suspention-in stride the sketch map that tiltedly draws three tower self-anchoring type synthetic rope bridge construction methods; Wherein: being to build or incremental launching positioning on the girder support that middle pylon cable-stayed bridge forms, the limit tower suspends in midair and dorsal funciculus tiltedly draws (a), (b) is that middle pylon cable-stayed bridge support is removed independent Cheng Qiao, (c) is tower place, limit tower beam temporary consolidation; (d) be that limit tower cable crane system sets up; The independent Cheng Qiao of end bay suspention section is to remove Bian Ta both sides girder falsework (e), is that the closure segment support is installed (f); Girder closes up and stretch-draw closure segment prestressing force, (g) is to remove the conversion of tower place, limit tower beam temporary consolidation completion system;
Fig. 3 be end bay according to the invention suspention-in stride the flow chart that tiltedly draws three tower self-anchoring type synthetic rope bridge construction methods;
Fig. 4 be a kind of end bay suspention provided by the invention-in stride the sketch map that tiltedly draws three tower self-anchoring types combination cable bridge novel construction method; Wherein: be to build or incremental launching positioning on the girder support that middle pylon cable-stayed bridge forms, the limit tower suspends in midair and dorsal funciculus tiltedly draws (a); (b) be that middle pylon cable-stayed bridge support is removed independent Cheng Qiao; (c) be that the closure segment support is installed, girder closes up and stretch-draw closure segment prestressing force, is to set up limit tower section cable crane system (d); (e) being to remove suspention section girder falsework, is that limit tower cable crane system sets up completion, safe Cheng Qiao (f);
Fig. 5 is the bridge type arrangement diagram of this a kind of embodiment of the present invention.
In the drawings
1-closure segment support; 2-stiff skeleton and closure segment; Tower among the 3-; 4-limit tower; The 5-suspension cable;
The 6-main push-towing rope; The 7-hoist cable; 8-tiltedly draws dorsal funciculus; 9-suspention section falsework or interim pier;
10-is the section of drawing support tiltedly; 11-tower beam temporary consolidation; The 12-girder.
The specific embodiment
Use below conventional job practices and technical scheme provided by the invention implement respectively certain end bay suspention-in stride and tiltedly draw three tower self-anchoring types combination cable bridge, crucial work progress sketch map is as shown in Figure 4 respectively.
The Numerical Simulation Analysis of above-mentioned two kinds of scheme work progresss is calculated with test and is shown; Construct according to scheme provided by the invention, when then becoming the bridge state internal force state of linear and each member of full-bridge and with the mechanical characteristic of this bridge under mobile load effect operation stage and correlated results basically identical according to routine construction gained.The present invention has simplified working procedure; Do not need on the limit Tata beam intersection to take the temporary consolidation measure; Thereby the work such as design, construction and unloading of having saved temporary consolidation, practiced thrift duration and cost greatly, and the safety problem of avoiding the uneven horizontal force unloading of temporary consolidation measure to occur.Comprehensively, economical, efficiently solved the end bay suspention-in stride draw tiltedly that three tower self-anchoring type synthetic rope bridge construction support safety are passed the flood period, girder rationally closes up, the difficult problem of completion system conversion and safe Cheng Qiao.
Shown in Fig. 4 (a); Tower 3 cable stayed bridges 5 at first forming; Cast-in-place or cantilever construction forms girder 12 on the oblique section of drawing support 10; On suspention section support or interim pier, build or incremental launching positioning forms the girder 12 that the limit tower crane draws, and on the support of girder 12, build 4 suspentions of limit tower and tiltedly draw dorsal funciculus 8 or it incremental launching positioning; Shown in Fig. 4 (b), behind the pylon cable-stayed bridge 5, tower tiltedly draws the tiltedly section of the drawing support 10 of girder 12 in the dismounting, closes up girder 12 again, independent Cheng Qiao in formation then; Shown in Fig. 4 (c), closure segment support 1 is installed again, is closed up girder 12 and stretch-draw closure segment prestressing force; Shown in Fig. 4 (d), set up limit tower 4 part cable crane systems afterwards, main push-towing rope 6 is installed; Tiltedly draw dorsal funciculus 8, and part hoist cable 7, set up tethered system after; Shown in Fig. 4 (e), just can remove closure segment support 1 falsework such as grade of suspention section girder, last; Shown in Fig. 4 (f), accomplish the setting up of limit tower cable crane system, safe Cheng Qiao.Said stiff skeleton is the stiffness structure in the closure segment.
The working procedure of " limit tower cable crane system sets up " is moved to after girder 12 closes up, and the uneven horizontal force that construction middle girder 12 possibly born reaches middle tower 3 through the permanent measure of rigidly connecting between middle tower 3 and the girder 12 and bears.
The content that the foregoing description is illustrated is to be understood that to these embodiment and only is used to be illustrated more clearly in the present invention; And be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
List of references
[1] Xiao Rucheng, Xiang Haifan. tiltedly draw-suspend in midair co-operative system bridge mechanical characteristic and economic performance thereof research [J]. Chinese highway journal .1999,012 (003): 43-48,116.
[2] Huanghai Sea is new. and self-anchoring type tiltedly draws-suspends in midair co-operative system bridge Study on dynamic response (D). Dalian: Dalian University of Technology 2007.
[3] Zhang Xinjun, Sun Ping Nan, Chen Airong etc. suspension cable-tiltedly draw the flutter stability of combined system birdge to study [J]. civil engineering journal, 2004,37 (7): 106-110
[4] Chang Fuping, Mei Xiudao. the concrete self-anchoring type hangs its static performance research [J] of drawing the combination cable bridge. world's bridge, 2008,01:38-41.
[5] Chang An University. Hanzhong City West 2nd Ring Road bridge full-bridge model investigation report [R]. Xi'an: highway institute of Chang An University, 2010.
Claims (4)
1. end bay suspention-in stride the erection method that tiltedly draws three tower self-anchoring types combination cable bridge, it comprises the steps,
1. the cable stayed bridge (5) of tower (3) in forming forms limit tower (4) and hangs the girder (12) that draws;
2. close up girder (12);
3. set up limit tower (4) cable crane system;
4. remove the suspention section support or the interim pier (9) of limit tower (4) both sides girders (12);
5. dorsal funciculus (8), hoist cable (7), cable stayed bridge (5) are tiltedly drawn in adjustment;
6. Cheng Qiao.
2. end bay according to claim 1 suspention-in stride the erection method that tiltedly draws three tower self-anchoring types combination cable bridge; It is characterized in that; Pylon cable-stayed bridge (5) forms in the step in said, and the generation type of girder (12) is for going up cast-in-place or cantilever construction at the oblique section of drawing support (10).
3. end bay according to claim 1 suspention-in stride the erection method that tiltedly draws three tower self-anchoring types combination cable bridge, it is characterized in that the generation type of the girder (12) that said limit tower crane draws is for building or incremental launching positioning on suspention section support or interim pier.
4. end bay according to claim 3 suspention-in stride the erection method that tiltedly draws three tower self-anchoring types combination cable bridge; It is characterized in that; When girder (12) adopts the tiltedly section of drawing support (10) construction; Behind the pylon cable-stayed bridge in formation (5), tower tiltedly draws the tiltedly section of the drawing support (10) of girder (12) in the dismounting, closes up girder (12) again.
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| CN 201110123691 CN102154990B (en) | 2011-05-13 | 2011-05-13 | Electing method for side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102561208A (en) * | 2012-03-28 | 2012-07-11 | 中铁二院工程集团有限责任公司 | Method of tower-girder spontaneous construction for railway steel trussed cable-stayed bridge |
| CN103911956B (en) * | 2014-03-21 | 2015-11-18 | 中铁大桥局集团有限公司 | A kind of large span stayed-cable bridge steel truss girder mounting method |
| CN103882812B (en) * | 2014-04-03 | 2016-01-20 | 重庆建工桥梁工程有限责任公司 | Across the construction method of girder in stayed-cable bridge |
| CN104652285B (en) * | 2015-01-21 | 2016-02-10 | 长安大学 | Large span self-anchored suspension bridge construction method for hanging and tower beam temporary anchoring device |
| CN107724260A (en) * | 2016-08-12 | 2018-02-23 | 北京万桥兴业机械有限公司 | Bridge machine is torn in steel bridge or steel reinforced concrete bridge split open |
| CN108505428B (en) * | 2018-05-23 | 2023-12-19 | 中铁第四勘察设计院集团有限公司 | Large-included-angle small-radius multi-tower curve cable-stayed bridge |
| CN110629678A (en) * | 2019-10-23 | 2019-12-31 | 中国电建集团成都勘测设计研究院有限公司 | Cable-stayed bridge's cable auxiliary stand |
| CN111335168B (en) * | 2020-03-09 | 2020-12-22 | 西南交通大学 | Closure method for kilometric hybrid beam cable-stayed bridge |
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