CN101962933B - Splicable flange plate of bridge - Google Patents
Splicable flange plate of bridge Download PDFInfo
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- CN101962933B CN101962933B CN2010102626011A CN201010262601A CN101962933B CN 101962933 B CN101962933 B CN 101962933B CN 2010102626011 A CN2010102626011 A CN 2010102626011A CN 201010262601 A CN201010262601 A CN 201010262601A CN 101962933 B CN101962933 B CN 101962933B
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Abstract
The invention relates to a splicable flange plate of a bridge. In the invention, one side of the splicable flange plate is provided with a secondary casting cast-in-situ wet joint section; reserved connecting reinforcing steel bars conforming to the structure are respectively arranged at the side of an advanced prefabricated flange and above the flange; and moreover, transverse reinforcing steel bars (vertical to the spanning direction of the bridge) at the upper edge and the lower edge in the splicable flange plate both adopt stressed thick reinforcing steel bars to ensure that the structure can simultaneously bear positive and negative bending moments. The invention establishes a foundation for the design and construction standardization of the splicing and broadening reformation of the bridge, simplifies complicated bridge designs and defines complicated stressing modes. The total cost of the splicable flange plate is greatly reduced, and the social benefit is obviously increased. After the splicable flange plate is applied to the construction of interchange bridges constructed in stages or bridges which are designed by modules and simultaneously constructed, fully-prefabricated splicing can be realized, and the construction schedule is accelerated; the splicable flange plate can be used for guaranteeing the using functions and the integral coordination of a main bridge and is convenient for continuous construction; and the splicable flange plate provides great adjustment leeway for subsequent design optimization and also provides a technical support for upgrading and reforming.
Description
Technical field
The present invention relates to the thin portion of a kind of bridge structure, be specifically related to a kind of sliceable frange plate of bridge.And the view picture bridge that utilizes the sliceable frange plate enlarging transformation of this bridge.
Background technology
No matter precast assembly hollowcore slab, T beam, combined box beam in the present bridge design; Or cast-in-place monolithic case beam, all there is not sliceable design, make following upgrading very difficult; Need the cutting frange plate; Carry out bar planting again, utilize wet seam and new splicing bridge to connect at last, piece together wide like Shanghai and Nanjing middle foot bridge at a high speed; And for the bridge that the bridge deck transverse prestress is arranged, breaking joint then need be set or remove newly-builtly, this also has many examples in the at a high speed a lot of bridges enlargings in Shanghai and Nanjing.
Also have a lot of intercommunication bridges or municipal bridge, because the intercommunication transformation, or the reason that the municipal traffic tissue upgrades, charge station removes and so on, cause structure to change and can't realize.Like overhead charge station of Jiang-Han Area, Wuhan one bridge etc., for urban construction stays sorry.Though what have can realize that cost is high, the labor manpower and materials are like bridge ring road transformation under wuhan yangtze river two bridges etc.
Make bridge lateral splicing or dismounting no longer difficult, we must carry out new research or introduce new technology, and frange plate is carried out sliceableization transformation.
The existing mature technology that we are looking to be correlated with earlier:
(1) existing bridge edge frange plate is like Fig. 1.Among the figure, the prefabricated frange plate 1 of certain structure is bridge edge partial structurtes, have on it cast-in-site bridge deck concrete mat formation the layer 2; There is the bottom to be embedded in the guardrail reinforcing bar 4 in the prefabricated frange plate in the cast-in-site guardrail 3; There are the dripping eaves 5 that just form when prefabricated frange plate edge below.
Characteristics: frange plate is generally pressed the outrigger base design, only receives hogging moment (upper limb receives tensile stress), does not do positive bending moment design (do not consider that lower edge is drawn, also do not prepare stressed bar reinforcement at lower edge), and needs pre-buried guardrail reinforcing bar.
Not enough below existing in the existing design:
1) frange plate does not have the positive bending moment steel bar stress, can't be transformed into the bridge deck of bidirectional stress.
2) the guardrail reinforcing bar is in a single day pre-buried, and adjustment leeway in plane is little, because that precast beam is all pressed straight line is prefabricated, for curved bridge, the edge often forms broken line.
3) dripping eaves are prefabricated in advance, are difficult to guarantee unification, and aesthetic property also cannot say for sure to demonstrate,prove.
(2) beam flange plate (bridge deck joint) in the existing combined box beam is like Fig. 2.The prefabricated frange plate 1 of combined box beam utilizes " cast-in-place wet seam " section 6 to connect into bridge deck; Have on it cast-in-site bridge deck concrete mat formation the layer 2; Side direction is provided with pre-buried side direction connecting reinforcement 7, utilizes the wet seam reinforcing bar 8 of the annular side direction connecting reinforcement 7 that the edge of a wing is pre-buried to connect during connection.
Characteristics: the connecting reinforcement on undirected, not strong with bridge floor in-situ layer globality, negative reinforcement is not strong, can not transform outrigger base as, does not have the guardrail embedded bar yet, therefore can not be as the bridge outward flange.
Not enough below existing in the existing design:
1) frange plate does not have vertical connecting reinforcement, and is not strong with the bridge deck globality.
2) edge of a wing connecting reinforcement is on the weak side, in case unbalanced amount of deflection or the wide situation of cast-in-place wet seam take place, possibly cause supporting capacity not enough.
3) only as in the flange of beam design, with side bar outer side wing edge disunity, can't unify prefabricatedly, construction is inconvenient.
Above 2 kinds of mature technologies have been arranged as the basis, we just can be comprehensive its characteristics separately, create a kind of multiple function that possesses, the sliceable frange plate that compliance is wider comes out.Before the concrete research approach, understand some characteristics of bottom wing listrium design again.
Frange plate is the extension of superstructure body rim to both sides, also can regard the encorbelment part or the extension of bridge deck as, is the thin portion structure that most bridge possesses, like Fig. 1, Fig. 2.The design of frange plate generally is independent design, because of bridge different.Because designer's custom is different, the design of frange plate also varies, from physical dimension, to form of reinforcement and arrangement of reinforcement quantity etc.As long as satisfy the supporting capacity of regulation and stipulation and the requirement of safe handling, most designs all are safe and feasibles.
But variation has taken place in everything beginning along with highway enlarging tide gradually.The enlarging of highway bridge need be with original old bridge at horizontally-spliced one section new bridge, and the old and new's bridging is connect firmly, and is stressed jointly, becomes a wideer new bridge.It is increasingly extensive that the demand of this bridge widening is becoming.In the bridge improvement project of the type, the frange plate of old bridge will be the object of at first being transformed.Will consider the problem of the following aspects in the transformation: one, whether the frange plate of old bridge satisfies improved force request because transform will cause receive force mode change the face even the diametrically opposite variation that can become in various degree.Like structure positive bending moment taking place originally might be changed to hogging moment.Two, how the frange plate of old bridge is connected with new bridge.The outer rim of old bridge frange plate is a complete closed, does not consider the secondary splicing to transform.Such situation just need utilize the bar planting technology reinforcing bar to be implanted the frange plate of old bridge.And this bar planting technology is quite expensive at present.
Summary of the invention
In order to overcome the above-mentioned deficiency of prior art, the purpose of this invention is to provide a kind of sliceable frange plate of bridge.The main body of bridge is precast assembly hollowcore slab, T beam, combined box beam, or cast-in-place monolithic case beam, and what the present invention relates to is the frange plate of said bridge main body side.This sliceable frange plate can solve the aforementioned problems in the prior, and makes to be provided with sliceable design in the bridge design, makes that following upgrading is very convenient; No longer need cut frange plate, bar planting; With wet seam, promptly can connect, for the bridge enlarging is provided convenience with new splicing bridge.The 2nd goal of the invention of the application is: a kind of sliceable frange plate that utilizes above-mentioned bridge is provided; The horizontal compound mode of the non-standard width bridge that is constituted; When transforming with the enlarging of realization bridge, utilize the sliceable frange plate of above-mentioned bridge, transverse set lumps together becomes the view picture bridge.
The technical scheme of accomplishing the foregoing invention task is: a kind of sliceable frange plate of bridge is characterized in that: one side " cast-in-place wet seam " section that is provided with second pouring of this sliceable frange plate; Prefabricated in advance edge of a wing side direction and above, be equipped with the reservation connecting reinforcement that adapts with structure; And the last lower edge in this sliceable frange plate laterally (perpendicular to bridge span footpath direction) reinforcing bar all adopts stressed bar reinforcement, makes this structure can bear positive hogging moment simultaneously.
Sliceable frange plate of the present invention is compared the design of conventional flap listrium, increases to have considered following content:
Both can laterally be connected to become bridge deck between beam, also can be used as the bridge edge.As do not splice, reinforcing bar cast-in-situ bridge guardrail is stretched out in utilization becomes the bridge edge.Like splicing, be spliced bridge and also can adopt same configuration, connect with ring-shaped stirrup, and make cast-in-place wet seam, both become bridge deck between beam.
Need transform or remove like the later stage, can cast-in-place part be cut, become sliceable state shown in Figure 1 again.
Said frange plate receives curved design by two-way, and the configuration of balsh muscle is stronger than the conventional flap listrium up and down.
Relevant necessary explanation of the present invention
It should be stressed: the design essence of sliceable frange plate is a kind of versatility Interface design.
Frange plate is designed to the versatility interface, and then it must satisfy following several respects requirement:
1. versatility.The stressed needs of the frange plate of various structures had both been satisfied.
2. applicability.Can realize the various functions that frange plate is possible.As: as the bridge edge, connect Bridge guardrail; As the bridge middle part, laterally connect other structures.
3. commutativity.Can conveniently remove existing capability, then insert other functions.
In order to realize this three specific character, we are to existing frange plate, and some improvement below having done have formed " sliceable frange plate ".
1. lower edge on the edge of a wing is all disposed stronger steel bar stress, satisfy versatility, make it all can satisfy the bearing capacity needs receiving under the situation of positive hogging moment.
2. reserve upper limb connecting reinforcement and side direction connecting reinforcement, make it when connecting other structures, can bear horizontal force and vertical force respectively, satisfy applicability.
3. connecting reinforcement all within the preset outline of structure, during connection, adopts to connect auxiliary reinforcement and connecting reinforcement welding.When in case the replacing demand is arranged, can adopt " cutting "+mode of " cutting " breaks away from former auxiliary connecting reinforcement and connecting reinforcement is kept perfectly, thus insert new the connection, to realize " commutativity ".
The further improvement of above scheme has following prioritization scheme:
1. the described reservation connecting reinforcement that makes progress adopts following form: connect with one ring-shaped stirrup with diameter between the upper end of two reinforcing bars that make progress, constitute the sealing reinforced steel bar ring of half rectangle;
2. the length of said " cast-in-place wet seam " section is not less than 25cm;
3. the length that said side direction is reserved connecting reinforcement is set to 22cm;
4. the steel bar stress of described positive hogging moment, the reinforcing bar of ф 16mm is adopted in suggestion.
The present invention has following positive technique effect:
This design will realize transverse modular (or being called combined type) design of following bridge.For modularized design provides design interface.
Also will greatly promote simultaneously the scope of bridge standardized designs,, practice thrift construction fund on the whole greatly, meet the economic construction of current low charcoal economies, harmonious sustainable development construction theory for the upgrading reservation conditions that the later stage can't predict.
Key problem in technology point of the present invention:
Last bottom flange all disposes steel bar stress, makes frange plate can bear positive hogging moment simultaneously.
We know that general frange plate as not considering the later stage splicing, is exactly a kind of cantilever construction, will not have positive bending moment; Therefore generally all do not do the stressed design of positive bending moment,, have only edge of a wing complete resection in case there are the splicing needs in the later stage; Implant steel bar stress with the mode of bar planting again, long in time limit, technical sophistication; Expense is high, and construction is big to bridge operation influence.
Reserve connecting reinforcement at upper limb and side direction, make the frange plate later stage satisfy the demand of multiple possibility, compliance is stronger, and globality is stronger.
General frange plate is as doing splicing design, the guardrail reinforcing bar of direct pre-buried upper limb then, and in stage of post-production guardrail; Big adjustment can't be done, often at the figures edge because edge, the edge of a wing is carried out in the plane of guardrail; Form broken line shape or polygonal guardrail, influence attractive in appearance.And guardrail can have certain adjustment space at in-plane among the present invention, realizes the camber line construction at edge more easily, guarantees aesthetic property.And the dripping eaves at edge, the edge of a wing are accomplished realization unification attractive in appearance more easily with the guardrail cast-in-place construction.If do wet seam, the connecting reinforcement of upper limb can guarantee more that also a part of bridge floor integration plate participation is stressed jointly, and globality is better, has guaranteed the workmanship of wet seam crossing.
The scheme of accomplishing the 2nd invention of the application task is: a kind of sliceable frange plate that utilizes the described bridge of claim 1; The horizontal compound mode of the non-standard width bridge that is constituted; It is characterized in that: but make respectively and independent stressed with the extraneous bridge of normal width in the normal width scope; All adopt the described sliceable edge of a wing of claim 1 therebetween, and utilize the sliceable edge of a wing that two width of cloth bridges are lumped together through the cast-in-place wet seam transverse set of secondary to become the view picture bridge.
The concrete structure and the function introduction of invention
The sliceable edge of a wing thin portion structure and function of use introduction, see Fig. 3: 9 are reservation connecting reinforcement upwards among the figure.
The sliceable edge of a wing be comprehensively existing bridge deck outward flange with the wet seam of combined box beam and must neotectonics.
The cast-in-place wet seam of this edge of a wing design 25cm, upper limb and lateral margin are all reserved the reach connecting reinforcement, satisfy two kinds of situation of adjoining edge guardrail or splicing bridge simultaneously, and overstriking bar diameter, guaranteed simultaneously the stressed of hogging moment just.Extending laterally reinforcing bar, is to consider to bear vertical force when applying guardrail in order to make, and when applying wet seam, again can be as connecting reinforcement, two kinds of situation all can be suitable for.It is that guardrail (the wide 50cm of being generally of guardrail) in order to guarantee a half width connects on prefabricated frange plate that the extension elongation of 22cm is chosen, and the width of wet seam should be less than 25cm yet.The reinforcing bar that stretches out upwards is for when applying guardrail, bears the lateral impact overturning effect of guardrail; When applying laterally wet seam, can be used as the integration reinforcing bar again and play the connection bridge deck, strengthen the effect of globality.
The situation that connects guardrail; Like Fig. 4: half is in guardrail in the scope of the prefabricated edge of a wing (bridge deck), and is half the outside unsettled, and the reinforcing bar through upper limb and lateral margin is connected guardrail inside reinforcing bar; Guardrail and bridge deck are closely combined; Become integral body, the intensity and the overall with of opposing lateral impact are almost as broad as long in the cast-in-place situation of pre-erection, and owing to there is the certain width edge cast-in-place for entirely; Make the bridge edge carry out slyness more easily and handle, avoided the polygon bridge outer rim on the common circular curve.
Connect other superstructures (bridge deck wet seam) situation, like Fig. 5:
Horizontally-spliced with other superstructures with same sliceable standard edge of a wing, be very easily.Adapting to wet joint gap is 25cm-100cm, and recommendation is 50cm.Extend laterally between the reinforcing bar with connecting with the ring-shaped stirrup of diameter together, upper limb stretch out the bridge floor integration concrete that reinforcing bar then connects 8cm ~ 10cm, connecting reinforcement just in time plays the reinforcement globality, common stressed effect.
Remove guardrail, connect and widen bridge floor.If implemented guardrail, the later stage need be carried out bridge lateral and widened, then can be by behind Fig. 6 mode cutting disassembling, get final product according to the situation construction of the wet seam of bridge deck.
10 is line of cut among the figure, and 11 for cutting part.
Remove the part bridge floor, apply guardrail.Though this situation is less, also usually being left in the basket causes the later stage to handle, and like the viaduct charge station of Er Qiao Hankow, Jiang-Han Area, Wuhan end of the bridge, charge station removes the back viaduct and can't partly remove.If adopted the sliceable edge of a wing, then can show part dismounting bridge by Fig. 7: 9 are line of cut among the figure, and 10 for cutting part.Then can be according to the cast-in-place guardrail of the mode that applies guardrail, the enclosed bridge edge forms new bridge edge.
Meaning of the present invention:
The design and construction of widening transformation for the bridge splicing realize standardization foundation basis.Future in China 10 years is estimated every year and will have 5000 bridge blocks to splice to widen, if sliceable design has been arranged, can realize that standardization makes, and the investment of saving will be above 5,000,000,000.This is as the technological revolution that bring for the digital hardware product USB standardization connectivity port; The sliceable edge of a wing of bridge standardization also is a kind of notional revolution; For the development in future headspace, meet sustainable development, the new design theory of economizing economy and environmental protection.
The bridge design of complicacy is oversimplified, and the complicated force mode that receives is made clear.Perhaps, the process of simplifying can cause a little increase of engineering quantity, if but consider the saving cost that design, construction labour cost, duration cost and operation maintenance cost, reconstruction are in the future upgraded, its total cost will reduce greatly, and obvious social benefit increases.Everything all depends on the appearance on the sliceable edge of a wing.
Above technology is applied to the intercommunication bridge construction of time phasing or the bridge that the sub-module design is implemented simultaneously, has very big realistic meaning, and is specific as follows:
1) realization is precast spliced entirely, accelerating construction progress.
2) realize the full standardized designs of main line bridge normal width part, guarantee the function of use and the Total tune aesthetic property of main line bridge, make things convenient for the bridge formation machine to construct continuously.
3) the main line bridge does not have the ring road reserved opening, for the schematic design optimization of later stage intercommunication provides very big adjustment leeway, for the whole upgrading of following intercommunication technical support is provided yet.
4) interface is well defined, and the division of engineering quantity will be a dividing line with the standard width of subgrade, guarantee that each side's interests are clear and definite.
The scope of application of the present invention:
The present invention mainly is applicable to following several kinds of situation:
1) possibly apply the high-grade highway main line bridge of intercommunication future;
2) implemented intercommunication, but the following main line bridge that possibly carry out secondary intercommunication transformation;
3) bridge that possibly widen future;
4) bridge of following possibility lateral part dismounting.
Generally speaking, be applicable to that bridge width future is with the bridge that changes.And the way before the present invention is implemented to construct a bridge again after extensive the dismounting to existing bridge exactly.Bridge to have the sliceable edge of a wing is torn bridge open with regard to forming to piece together, and it has realized making the high main line bridge of cost to avoid the destiny that is removed because of the change that designs, and has reduced the risk of repeated construction investment.
Description of drawings
Fig. 1, Fig. 2 are prior art frange plate structural representation;
Fig. 3 is the thin portion in the sliceable edge of a wing of a present invention structural representation;
Fig. 4 connects the sketch map of guardrail for the present invention;
Fig. 5 connects other superstructures (utilizing wet seam to be connected to become bridge deck between beam) situation sketch map for the present invention;
Fig. 6 removes guardrail for the present invention, connects to widen bridge floor situation sketch map;
Fig. 7 applies guardrail situation sketch map for the present invention removes the part bridge floor;
Fig. 8-Figure 10 is an embodiment of the invention engineering sketch map.
The specific embodiment
Sliceable frange plate of the present invention is all adopted on the edge of a wing of all precast beams, with reference to Fig. 3.The side direction of this sliceable frange plate 1, top are equipped with reserves connecting reinforcement 7,9.
Like Fig. 8-Figure 10: the wide part of standard roadbed all adopts this grand bridge in front and back is the combined box beam of precast assembly, and construction is fast, and cost is low.But after getting into the intercommunication section, owing to arrived non-standard width roadbed part, if by the conventional design mode, then will adopt the whole case beam of cast-in-place construction, this kind box girder construction is slow, the cost height, and also outward appearance and prefabricated combined box beam also have than big-difference.And the variation of form of structure causes complicated organizationization, and the bridge formation machine can't be worked continuously from Dun Ding, need set up the bridge formation machine again to cast-in-place section bridge, causes the significant wastage of construction cost.Through the sliceable edge of a wing of the present invention, then can be optimized design, the bridge lateral of non-standard width of subgrade is separated into two modules: the combined box beam that in standard roadbed scope, still adopts precast assembly; And outside the normal width scope; Then adopt cast-in-place case beam, two modules all are designed to sliceable frange plate, after the later stage Stability Analysis of Structures (shrinkage strain completion); Implement cast-in-place wet seam (wet seam 6 among Fig. 9), two modules are connected to integral body.
The splicing theory of this " standard module+non-standard module " (being called for short " mark+nonstandard ") is one of basic concept of advocating of modern industry designing institute; It has guaranteed the harmony of structure, has simplified nonstandard scope of design to a greater degree, has reduced risk; Reduce cost, practiced thrift resource.And the generation of this invention of the sliceable edge of a wing, the prerequisite and the basis of realizing bridge lateral " mark+nonstandard " design just.
The another one uniqueness of this scheme has advantage to be; If this intercommunication is transformed again (though unpredictable at present in the future; But actual this situation often takes place); Remove easily on the nonstandard part sliceable edge of a wing then capable of using, and do not have influence on the standard module part, greatly reduces the risk of Project design change.
Claims (6)
1. the sliceable frange plate of a bridge is characterized in that: one side " cast-in-place wet seam " section that is provided with second pouring of this sliceable frange plate; Prefabricated in advance edge of a wing side direction and above, be equipped with the reservation connecting reinforcement that adapts with structure; And the last lower edge transverse reinforcement in this sliceable frange plate all adopts stressed bar reinforcement, makes this structure can bear positive hogging moment simultaneously.
2. the sliceable frange plate of bridge according to claim 1, it is characterized in that: the type of attachment of this sliceable frange plate is: when connecting guardrail, pre-buried edge of a wing reinforcing bar respectively with the inner reinforcing bar welding of guardrail; When connecting another frange plate, pre-buried edge of a wing reinforcing bar is connected with the bridge deck pavement reinforcing bar with cast-in-place wet seam reinforcing bar respectively.
3. the sliceable frange plate of bridge according to claim 1 is characterized in that, the length of said " cast-in-place wet seam " section is not less than 25cm.
4. the sliceable frange plate of bridge according to claim 1 is characterized in that, the length that said side direction is reserved connecting reinforcement is set to 22cm.
5. according to the sliceable frange plate of one of claim 1-4 described bridge, it is characterized in that lower edge bears the steel bar stress of positive hogging moment on the described frange plate, all is the reinforcing bars that adopt ф 16mm.
6. horizontal compound mode of utilizing the non-standard width bridge that sliceable frange plate constituted of the described bridge of claim 1; It is characterized in that: but make respectively and independent stressed with the extraneous bridge of normal width in the normal width scope; All adopt the described sliceable frange plate of claim 1 therebetween, and utilize sliceable frange plate that two width of cloth bridges are lumped together through the cast-in-place wet seam transverse set of secondary to become the view picture bridge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102626011A CN101962933B (en) | 2010-08-25 | 2010-08-25 | Splicable flange plate of bridge |
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| CN2010102626011A CN101962933B (en) | 2010-08-25 | 2010-08-25 | Splicable flange plate of bridge |
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| CN101962933B true CN101962933B (en) | 2012-05-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102953320A (en) * | 2012-12-10 | 2013-03-06 | 江苏省交通科学研究院股份有限公司 | Box bridge girder |
| CN103741797A (en) * | 2013-09-13 | 2014-04-23 | 柳忠林 | Prestressed concrete beam plate with upper portion provided with flexural steel bars and frame structure system |
| CN107587422A (en) * | 2016-07-07 | 2018-01-16 | 上海公路桥梁（集团）有限公司 | Precast splice type anti-collision wall and its manufacture method |
| CN109543348B (en) * | 2018-12-19 | 2022-12-23 | 中交第二航务工程局有限公司 | Calculation method for upper structure design of variable-width prefabricated bridge |
| CN112900308B (en) * | 2021-01-31 | 2022-05-31 | 安徽达尔智能控制系统股份有限公司 | Traffic safety indicating device for high-speed construction road section |
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| RU2185473C1 (en) * | 2000-11-21 | 2002-07-20 | Хабаровский государственный технический университет | Method for strengthening of stiffening plates joint of reinforced concrete bridge framework |
| KR20060093826A (en) * | 2005-02-22 | 2006-08-28 | 현대제철 주식회사 | Hybrid pier and continuity execution method using the hybrid pier |
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