CN101570960B - Fastening method of T-shaped beam bridge - Google PatentsFastening method of T-shaped beam bridge Download PDF
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- CN101570960B CN101570960B CN2009101366014A CN200910136601A CN101570960B CN 101570960 B CN101570960 B CN 101570960B CN 2009101366014 A CN2009101366014 A CN 2009101366014A CN 200910136601 A CN200910136601 A CN 200910136601A CN 101570960 B CN101570960 B CN 101570960B
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The present invention relates to a kind of reinforcement means of bridge, relate in particular to a kind of reinforcement means that cuts with scissors knot T beam bridge.
At present, in the existing T beam bridge of having built of China, what the horizontal connection between the T type beam was adopted mostly is that hinge connects, described being hinged is by the (see figure 1) that hinge knot steel plate is realized is set between adjacent T type beam, when adopting described hinge to connect, because its Transfer of Shear, so moment of flexure was mainly born by cast-in-place bridge floor when vehicular load acted on hinge seam place, and the thickness of the cast-in-place bridge floor of domestic large quantities of active service hinge knot T beam bridges is less, so the bridge deck at hinge seam place are prone to elongated longitudinal crack, not only influence traffic, and make horizontal connection between the T type beam weaken even lost efficacy, thereby make load mainly be born separately by the T type beam at vehicle place, therefore single T type beam stress is concentrated, and the integral bridge stress performance reduces.It is necessary for this these bridges being reinforced.
Reinforcement means to hinge knot T beam bridge in the prior art has two kinds: first kind is to replace old hinge knot steel plate with new hinge knot steel plate, this method does not change the annexation of hinge knot between the T type beam, a little less than the hinge seam connects, integral bridge rigidity is not high, therefore uses 1 year axle casing to occur the crack needs again and reinforces again.Second kind is to build bridge deck again, and increase its thickness, this method has increased the thickness of hinge seam and has made a part of bridge deck and T type beam combination stressed, yet the shortcoming of its existence is also to make the dead load of T type beam increase more when bridge deck increase thickness, and fundamentally do not change the stress that hinge is tied between the T type beam, therefore not obvious to the reinforcement effect of integral bridge.The third method is to set up the multiple tracks gooseneck between per two T type beams, set gooseneck in this method, though to laterally getting in touch, but because the rigidity of gooseneck is little more than the rigidity of concrete T beam, the misfeasance that is connected of gooseneck and T type beam in addition bed rearrangement bridge lateral stiffness improved not how many contributions, if then can not make gooseneck and T type beam stressed synchronously, gooseneck performs practically no function in this case, can not play the effect of reinforcing at all.
The beam bridge ruggedized construction that a kind of T type beam section converts box to is disclosed in publication number is the Chinese patent literature of CN2613512Y, this structure has additional reinforced concrete floor for the lower edge at T type beam, the formation box-girder thereby reinforced concrete floor and T type beam are rigidly connected.This technical scheme can strengthen bending resistance, torsional rigidity, and improves the bearing capacity of bridge.Yet, to adopt this technical scheme to necessarily require connection between the wing plate bridge deck of this T type beam be not the hinge knot but rigidly connect, constitute a complete box-structure, otherwise this technical scheme is because the stressed depth of section of described reinforced concrete floor is limited, transmitted load effectively between adjacent T type beam, little to the bending rigidity effect that improves T type beam like this; In addition, because this ruggedized construction requires to form box-structure, that is to say, to between most of lower edge of adjacent T type beam, set up reinforced concrete floor, need a large amount of bar plantings and installing template, the problem of bringing thus is that the punching of bar planting may be subjected to the pre-stressed area of topmost tensile stress to constitute destruction to T type joist support; The workload of installing template and concreting is very big; The reinforced concrete floor that is increased after construction is finished makes the deadweight of bridge obviously rise.
To sum up, all there is the stress that does not have hinge knot connection between the radical change T type beam in prior art to the reinforcing of hinge knot T beam bridge, a little less than the hinge seam connects, and the shortcoming that integral bridge rigidity is not high.
At present, when building new bridge, increase the load increase that causes owing to consider vehicle, so adopt is rigidly connected more in the connection of T type beam, concrete technology is to reserve crossbeam reinforcing bar and wet joint reinforcing bar respectively on the web of T type beam and wing plate, and between the wing plate of adjacent T type beam, stay the seam of building of broad, then by described the seam concrete beam between the cast web, the fluid concrete wet joint more earlier of building; In above-mentioned casting process, need with the concrete vibrating rod to the concrete that pours into not failure of oscillation smash, thereby reach the purpose that makes concrete evenly distribute and solidify.Concerning existing beam bridge, bridge floor is continuous, is not used for building the seam of crossbeam between wing plate.If chisel between the wing plate of T type beam in order to build crossbeam and to build seam, can waste great amount of manpower and material resources, also may the original structure of T type beam be damaged.Owing to do not build seam, also can't vibrate to concrete in addition while building.The method of building crossbeam when therefore building new bridge is not suitable for being applied in the technology of reinforcing existing beam bridge.
Summary of the invention
For this reason, technical problem to be solved by this invention is to change the stress of the hinge knot of existing T beam bridge, thereby the method that make T beam bridge reinforcing of a kind of change " hinge knot " for " rigidly connecting " is provided.
Another technical problem to be solved by this invention is to provide the method for the reinforcing T beam bridge that makes the raising of integral bridge rigidity.
For solving the problems of the technologies described above, the reinforcement means of a kind of T beam bridge of the present invention, described T beam bridge comprise that a plurality of cross sections are the T type beam of T type, and described T type beam is made up of wing plate that is positioned at horizontal part and the web that is positioned at vertical component effect, may further comprise the steps,
(1) reinforcing bar is implanted at the predetermined position that forms reinforcing crossmember between the web of adjacent T type beam;
(2) the predetermined position that forms reinforcing crossmember adds template between described web, forms the groove of building between the web that connects adjacent T type beam, the top of described template and described wing plate bottom between leave the space that is suitable for concreting;
(3) build fluid concrete in the groove to described, treat described concrete curing after, between the web of adjacent described T type beam, form along the horizontally extending concrete beam of T type beam span vertical direction.
The height of the concrete beam in the described step (3) is at least 1/2nd of described T type depth of beam.
In step (2), the top of described template and described wing plate bottom between vertical distance be 10-20 centimetre.
The step of described fluid concrete is to utilize power set that liquid concrete is transported in the space of described template qualification.
Described liquid concrete is a self-compacting concrete.
Described reinforcement means is further comprising the steps of,
(I) cut the edge of the wing plate span direction of adjacent T type beam;
(II) between the wing plate of described adjacent T type beam, implant reinforcing bar, make described reinforcing bar laterally connect the described edge of the wing plate span direction of adjacent described T type beam;
(III) the described edge lower part between described wing plate adds template;
(IV) concreting wet joint.
Also be included in the step of described wing plate edge brushing interfacial agents before in described step (II).
Described reinforcement means is further comprising the steps of:
(a) the whole bridge deck concrete that cuts on the described T beam bridge is spread layer;
(b) on whole bridge floor, lay steel mesh reinforcement;
(c) implant vertical reinforcement at the top of described T type beam, it is connected with steel mesh reinforcement in the described step (b);
(d) concreting forms new combined bridge deck.
Also comprise the step of the end face of described T type beam being cut a hole hair before in described step (b).
In described step (d) before, the end face that also is included in described T type beam is smeared the step of interfacial agents.
In described step (b), lay two-layer steel mesh reinforcement up and down.
In described step (d), described concrete is an expansive concrete.
Technique scheme of the present invention has the following advantages compared to existing technology: the reinforcement means of (1) T beam bridge of the present invention is included in the technology of concreting crossbeam between the web of adjacent T type beam, this technology links together the web of T type beam, the rigidity of concrete beam rigidity of setting up and T type beam is suitable, transmitted the load of girder, outer year of acting on the bridge can at utmost be distributed on the every T type beam equably, improve the integral rigidity of bridge greatly; (2) height of described concrete beam is 1/2 of a described web height, and the concrete beam of described height connects the hinge between T type beam knot to become and is rigidly connected, and has strengthened the rigidity that T type beam connects greatly, and the reinforcing of bridge is played a key effect; (3) reinforcement means of T beam bridge of the present invention, the concrete at wing plate edge that can also be by cutting per two adjacent T type beams, and between the wing plate of described T type beam, implant the last concreting wet joint of transverse reinforcement, thereby original hinge seam is changed to wet joint, T type beam becomes the stress that rigidly connects by original hinge knot stress, therefore strengthened the coupling stiffness at T type beam hinge seam place greatly, also shared the moment of flexure that deck paving bore simultaneously, also changed the independent stressed state of T type beam of the T beam bridge that has damaged in addition, make a plurality of T type beams simultaneously stressed, improved the durability and the useful life of described T beam bridge; (4) in the reinforcement means of T beam bridge of the present invention, also comprise the whole bridge deck concrete shop layer that cuts described T beam bridge, and laying steel mesh reinforcement, replant into vertical reinforcement, it is connected with described steel mesh reinforcement, and concreting forms the technology of new combined bridge deck again, and this technology has increased the stressed depth of section of T type beam and has been subjected to force intensity, both improve the horizontal bending resistance of bridge floor, also improved the supporting capacity of T type beam.(5) reinforcement means of T beam bridge of the present invention, can take wherein one or both or three kinds in above-mentioned three kinds of technologies to adopt simultaneously, the damaged situation of the T beam bridge that concrete condition is optionally reinforced and deciding, reach the technique effect of " become to cut with scissors to become and rigidly connect " when above-mentioned technology adopts simultaneously very well, improved the rigidity of T beam bridge on the whole.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the connection diagram of the existing T beam bridge T type beam described in the background technology;
Fig. 2 is the structural representation of single T type beam;
Fig. 3 is a bar planting manner of formulation schematic diagram in the method for the present invention;
Fig. 4 is the sectional view along the A-A line among Fig. 3;
Fig. 5 is the structural representation of the T beam bridge after reinforcing according to the method described in the present invention.
Reference numeral is expressed as among the figure: 10-hinge knot steel plate; The 1-wing plate; The 2-web; 3-concrete wet joint; The 4-concrete beam; 5-T type beam; N1-implants distribution bar; N2-connects distribution bar; The N3-principal rod; The N4-stirrup.
The specific embodiment
The reinforcement means of T beam bridge of the present invention is used for the T beam bridge that existing hinge connects.Described T beam bridge comprises that a plurality of cross sections are the T type beam 5 of T type, and as shown in Figure 2, described T type beam 5 is made up of wing plate 1 that is positioned at horizontal part and the web 2 that is positioned at vertical component effect.Owing to adopt hinge to connect, as shown in Figure 1, moment of flexure was mainly born by cast-in-place bridge floor when vehicular load acted on hinge seam place, and the bridge deck that therefore cut with scissors the seam place are prone to elongated longitudinal crack, horizontal connection between the T type beam 5 at this moment weakens greatly even lost efficacy, and need reinforce it.The reinforcement means of hinge knot T beam bridge of the present invention is:
Fluid concrete between the web 2 of adjacent T type beam 5 makes the technology that forms concrete beam 4 between the web 2 of described adjacent T type beam 5, and described concrete beam 4 as shown in Figure 5.Below to surpass 25 meters bridge with total bridge length be example, concrete processing step is described: reinforcing bar is implanted at the predetermined position that forms reinforcing crossmember on the web 2 of described T type beam 5, the degree of depth of implanting is 16 centimetres, the reinforcing bar of being implanted comprise be parallel to each other and be parallel to ground take root in distribution bar N1 and principal rod N3 more, described implantation distribution bar N1 is connected with another implantation distribution bar N1 of the relevant position of the web 2 of implanting adjacent T beam bridge by connecting distribution bar N2, as shown in Figure 3 and Figure 4; Described implantation distribution bar N1 is 16 millimeters with the diameter that is connected distribution bar N2, is arranged on the top of described principal rod N3, described implantation distribution bar N1 be connected distribution bar N2 and play and support and the effect of the fixing concrete beam 4 that will build; The diameter of described principal rod N3 is 20 millimeters, is arranged on the position near web 2 bottoms, and adjacent web 2 is implanted at its two ends respectively.Principal rod N3 is arranged on this position, is because when loading is on bridge, the arm of force maximum of this position, the moment of flexure maximum that is subjected to; Adopt stirrup N4 to implanting distribution bar N1 and being connected distribution bar N2 and principal rod N3 fixes, prevent that the concrete that will build from will implant distribution bar N1, connection distribution bar N2 and principal rod N3 is shifted.After above-mentioned bar planting step is finished, add formwork for placing, the predetermined position that forms reinforcing crossmember adds template between described web, form the groove of building between the web that connects adjacent T type beam, the top of described template and described wing plate bottom between leave the space that is suitable for concreting, in the present embodiment the top of described template and described wing plate bottom between vertical distance be 10 centimetres.Build self-compacting concrete, make between the web 2 of described adjacent T type beam 5 to have along the concrete beam 4 of T type beam 5 span directions.The pouring technology of the technology of described cast self-compacting concrete during with the existing building new bridge is different, described concrete beam is to pour concrete into cast template from top to down by the wide poured joint that leaves between the wing plate of T type beam 5 when building new bridge, by the concrete vibrating rod its reinforcing of vibrating is obtained then; And in the method for the old T beam bridge of reinforcing of the present invention, owing to there has been continuous old bridge floor, build seam if between the wing plate of T type beam, chisel in order to build crossbeam, can waste great amount of manpower and material resources, also may the original structure of T type beam be damaged, the method for building crossbeam when therefore building new bridge is not suitable for being applied in the technology of reinforcing existing beam bridge.In the present embodiment, utilize power set (as pump) self-compacting concrete to be transported in the space of formwork for placing qualification by the pipeline that passes the space between template and the wing plate, described self-compacting concrete is a liquid concrete, can under the effect of self gravitation, evenly trickle, in building mould, evenly distribute, need not to vibrate and can evenly solidify, other liquid concrete also can be realized purpose of the present invention certainly.
The height of described concrete beam 4 is at least 1/2nd of web 2 height, the knot of the hinge between the T type beam 5 is become be rigidly connected, and has strengthened the rigidity that T type beam 5 connects greatly.In the above-described embodiments, also can be as required, between the web 2 of described adjacent T type beam 5, build three road concrete beams 4 along the span direction.In the above-described embodiments the top of described template and described wing plate bottom between vertical distance also can be 15 centimetres or 20 centimetres.Concrete technology is identical with this embodiment.
On the basis of the foregoing description, if bridge floor elongated crack occurred at hinge seam place, then also need be between the wing plate of T type beam 5 the concreting wet joint.Concrete steps are: the concrete of described T type beam 5 wing plates 1 that at first cuts wing plate 1 edge of adjacent T type beam 5, brushing interfacial agents on described wing plate 1 edge again, implant reinforcing bar at 1 of the wing plate of described adjacent T type beam 5 then, make described reinforcing bar laterally connect the wing plate 1 of described adjacent T type beam 5, described edge lower part between described wing plate adds template, last concreting wet joint 3 (see figure 5)s.The brushing interfacial agents forms for building many years ago because of wing plate 1, its with the wet joint 3 of newly building between combine a little less than, influence the intensity of junction, the brushing interfacial agents can make between described wing plate 1 and the concrete wet joint 3 of newly building combine tightr.
After finishing, above-mentioned steps can also cut the whole bridge deck concrete shop layer of the end face of T type beam 5, and the end face of the described wing plate 1 of cutter hair, after the water flushing, end face at described T type beam is laid steel mesh reinforcement, and implant vertical reinforcement at the end face of described T type beam 5, it is connected with described steel mesh reinforcement, smears interfacial agents at the end face of described T type beam 5 again, pour into a mould expansive concrete at last and form new combined bridge deck.In this step in order to make the combination between T type beam 5 end faces of newly building and the bridge deck that will build tightr, face to T type beam 5 is cut a hole hair, make the end face formation diameter of junction be not less than 6 millimeters rough matsurface, depression and projection can increase the end face of T type beam 5 and the bridge deck that will build between contact area and roughness, thereby increase adhesion between the two.In addition, in this step, can lay two-layer described steel mesh reinforcement, because original bridge deck are generally only laid one deck reinforcing bar owing to consider at that time traffic conditions and vehicle flowrate.But raising along with the load-carrying of the increase of vehicle flowrate and transportation, engineering truck, the load of bridge increases the weight of greatly, only lay one deck reinforcing bar and can not satisfy the requirement of load the intensity of bridge deck, therefore lay two-layer steel bar stress net in the method, and it is linked to each other with the reinforcing bar of implanting at the end face of T type beam 5 wing plates, so that the bridge deck participation is combination stressed.
Strengthen the horizontal connection of T beam bridge by the reinforcement means of the foregoing description, the stress of T type beam 5 has been become by the hinge knot rigidly connect, thereby improved the integral rigidity of bridge.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|CN2009101366014A CN101570960B (en)||2009-05-08||2009-05-08||Fastening method of T-shaped beam bridge|
Applications Claiming Priority (1)
|Application Number||Priority Date||Filing Date||Title|
|CN2009101366014A CN101570960B (en)||2009-05-08||2009-05-08||Fastening method of T-shaped beam bridge|
|Publication Number||Publication Date|
|CN101570960A CN101570960A (en)||2009-11-04|
|CN101570960B true CN101570960B (en)||2011-06-15|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CN2009101366014A CN101570960B (en)||2009-05-08||2009-05-08||Fastening method of T-shaped beam bridge|
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|CN (1)||CN101570960B (en)|
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|CN101906753B (en) *||2010-08-16||2011-12-14||中冶建工有限公司||Method for controlling concrete compactness at T-shaped beam deformation section of reinforced concrete prestress|
|CN102535356B (en) *||2012-02-21||2014-07-30||中南大学||Construction method used for carrying out strengthening treatment on heavy haul railway bridge|
|CN102635060B (en) *||2012-05-02||2014-12-31||周劲宇||Concrete hollow slab bridge reinforced by transverse steel beams|
|CN106087745B (en) *||2012-10-17||2017-11-07||上海市政工程设计研究总院（集团）有限公司||A kind of multiple-piece composite beam bridge top and the bottom monolithic construction construction method|
|CN105019350B (en) *||2014-04-30||2017-02-15||郑州大学||Prefabricated T-shaped beam and method of building continuous beam bridge by adopting prefabricated T-shaped beams|
|CN104499430B (en) *||2014-12-18||2016-03-23||上海市城市建设设计研究总院||Section connection structure is connect for wet between full prefabricated bridge|
|CN105274945A (en) *||2015-08-25||2016-01-27||西南交通大学||Composite reinforcing construction technology for reinforcing simply supported prestressed plate girder through resin base materials and steel wire meshes|
|CN105951613B (en) *||2016-07-11||2017-07-04||北京市市政工程研究院||A kind of combination type prestressed steel diaphragm, hardened system and its reinforcement means|
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- 2009-05-08 CN CN2009101366014A patent/CN101570960B/en not_active IP Right Cessation
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