CN102808372A - Simply supported prefabricated integrally-cast superposed bridge and construction method thereof - Google Patents
Simply supported prefabricated integrally-cast superposed bridge and construction method thereof Download PDFInfo
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- CN102808372A CN102808372A CN2012102954566A CN201210295456A CN102808372A CN 102808372 A CN102808372 A CN 102808372A CN 2012102954566 A CN2012102954566 A CN 2012102954566A CN 201210295456 A CN201210295456 A CN 201210295456A CN 102808372 A CN102808372 A CN 102808372A
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Abstract
The invention discloses a simply supported prefabricated integrally-cast superposed bridge. The prefabricated integrally-cast superposed bridge comprises inverted T-shaped prestressed prefabricated beam parts, cast-in-situ parts and horizontal baffles, and is characterized in that each cast-in-situ part comprises a cast-in-situ plate and a cast-in-situ superposed part at the upper part of the beam part; pretensioned prestressed steel strands are embedded in the upper parts of a web plate and a lower flange of each inverted T-shaped prestressed prefabricated beam part; the horizontal baffles adopt prefabricated plates, and are longitudinally arranged at intervals between the web plates of the adjacent prefabricated beam parts at the two ends of each beam part and positioned above the flanges of the prefabricated beam parts; and the inverted T-shaped prestressed prefabricated beam parts adopt manufacturing moulds commonly used with buildings, and mould plates are good in commonality, convenient to mount and dismount, high in working efficiency and low in amortized cost.
Description
Technical field
The present invention relates to field of bridge construction, relate in particular to a kind of precast monolithic formula bridge.
Background technology
The traffic and the municipal bridge of medium and small span (12-24 rice) adopt prestress box beam or beam type bridge usually, and be in the majority with the employing Post-tension Prestress Construction, during like the design of employing freely-supported; Deck-molding is generally bigger, and prefabricated beam or plate are from great, and transportation and installation need main equipment; Manufacturing and installation rate are slow, and the template of different size is adopted in the making of beam, and the template versatility is poor; Template amortization cost is high, and it is poor that precast bridge connects globality, in addition; Post-stressed need are in the milk in the steel strand sleeve pipe, and grouting can bring the prestressed reinforcement corrosion to make the poor durability of bridge during leakiness and produce security risk, and above-mentioned this bridge is big from great steel using amount; Cost is high, and the low light-duty I-shaped superimposed bridge of a kind of cost does not also appear in the newspapers.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art, and a kind of superimposed bridge of integral precast and job practices from heavy and light, freely-supported that cost is low is provided.
According to the superimposed bridge of the integral precast of a kind of freely-supported provided by the invention; Comprise inverted T-shaped prestressing force precast beam part, cast-in-place part and diaphragm; It is characterized in that said cast-in-place part comprises the cast-in-place superimposed part of cast-in-place plate and beam top; Inverted T-shaped prestressing force precast beam bottom flange and web top all are embedded with the pretensioned prestressing steel strand; Said diaphragm is a precast plate, and said diaphragm reaches at the beam two ends and longitudinally is arranged at a certain distance between the web of contiguous prefabricated beam, and is positioned at the top, the edge of a wing of said precast beam.
Also have following attached technical characterictic according to the superimposed continuous bridge of a kind of freely-supported integral precast provided by the invention:
The web upper surface of said precast beam longitudinally vertically is embedded with bar dowel or angle steel, and bar dowel or angle steel upper end are imbedded in the concrete of cast-in-place plate.
Longitudinally bury down the parabolic elongated no bonding prestress steel strand that are with sleeve pipe in the beam body of said precast beam underground, steel strand two client links that expose precast beam have ground tackle and are anchored in beam end.
Cast-in-place plate bottom surface between two precast beams is provided with steel sheet, and said steel sheet is the flat die mould galvanized steel plain sheet of remaining silent, or the self-bearing type steel bar girder permanent template of forming for steel bar continuous truss and the galvanized steel plain sheet that is interrupted at the precast beam place.
All embedding at the bottom of the plate face of said cast-in-place plate and the plate have a two-way concrete slab, is embedded with longitudinal reinforcement in the cast-in-place superimposed part in beam top and the cast-in-place part stirrup in diaphragm top.
Said diaphragm is flat board or inverted T shaped plate, and groove is vertically left at its two ends, and the diaphragm bottom vertically is provided with through hole, is installed with prestress wire or reinforcing bar in the through hole, is filled with concrete between prefabricated diaphragm and precast beam and in the diaphragm through hole.
The job practices of the superimposed simple bridge of integral precast may further comprise the steps:
A, inverted T-shaped precast beam lifting is held on the bridge pier bent cap;
B, installation diaphragm wear steel strand or reinforcing bar in diaphragm;
C, the laying permanent galvanized steel template of floor or formwork;
Placing of reinforcement at the bottom of D, the colligation plate;
E, water the thick first floor concrete of tamping iron 50-70mm;
After F, concrete reached certain intensity, the un-bonded prestressed steel strand of stretch-draw un-bonded prestressed steel strand and diaphragm bottom was also used the ground tackle anchoring;
Placing of reinforcement and beam top, diaphragm upper reinforcement on G, the colligation plate
H, the disposable tamping iron remainder concrete that waters;
I, remove all templates, accomplish superimposed continuous bridge.
The described diaphragm of step B can be worn the ordinary steel twisted wire in its hole when adopting the inverted T-shaped diaphragm, and the grouting between the bottom flange of inverted T-shaped and precast beam web of its steel strand tension is watered afterwards and at the floor concrete and carried out before smashing.
Compared with prior art have following advantage according to superimposed continuous bridge of a kind of freely-supported integral precast provided by the invention and job practices:
1, inverted T-shaped pre-erection beam is from heavy and light, easy transportation and installation, and speed of application is fast.
2, prefabricated inverted T-shaped part beam adopts the mfg. moulding die with universal building, the template highly versatile, and peace is torn open conveniently, and work efficiency is high, and template amortization cost is low.
3, precast beam adopts the pre-tensioning system long-line pedestal to make, and has saved duct grouting technology, has stopped the hidden danger of quality of steel strand corrosions.
4, bridge lateral is established the prestressing force diaphragm, bridge good integrity beam, and beam cooperative bearing performance is good.
5, adopt cast-in-place plate concrete secondary to water the technology of smashing, solved the problem of inverted T-beam bending resistance difference, beam construction stage moment of flexure when watering concrete is for the first time reduced, thereby the arrangement of reinforcement of beam is reduced, deck-molding reduces.
6, adopt permanent steel form, easy construction, safety.Stride lessly because of plate in addition, profiled sheet construction stage moment of flexure is less, and steel plate thickness is little, and cost increases few, especially adopts steel bar girder steel board, makes the branch secondary water tamping iron the old and new concrete binding ability and improves.
7, the un-bonded prestressed steel strand of falling parabola easy construction in the precast beam, cost is economized, and has solved beam-ends web sloping section cracking resistance problem, makes the old and new's concrete combine globality to improve.
Description of drawings
Fig. 1 is bridge construction figure of the present invention.
Fig. 2 is the sectional view of A-A among Fig. 1.
Fig. 3 is the sectional view of B-B among Fig. 1.
Fig. 4 is a beam-ends arrangement of reinforcement enlarged drawing of the present invention.
Fig. 5 is the sectional view of C-C among Fig. 2.
Fig. 6 is the sectional view of D-D among Fig. 5.
Fig. 7 is the flat profiled sheet stereogram of remaining silent among the present invention.
Fig. 8 is the self-bearing type steel bar girder permanent template stereogram among the present invention.
Fig. 9 is the stereogram and the construction arrangement of reinforcement of diaphragm among the present invention
Figure 10 is a precast beam stereogram of the present invention
The specific embodiment
Referring to Fig. 1 to Figure 10; The embodiment of the superimposed bridge of integral precast of a kind of freely-supported that provides in the present invention; Comprise inverted T-shaped prestressing force precast beam part 1, cast-in-place part 2 and diaphragm 3; Said cast-in-place part 2 comprises the cast-in-place superimposed part 22 of cast-in-place plate 21 and beam top, and inverted T-shaped prestressing force precast beam 1 bottom flange 11 and web 12 tops all are embedded with pretensioned prestressing steel strand 4, and said diaphragm 3 is a precast plate; Said diaphragm 3 longitudinally is arranged on 12 of the webs of contiguous prefabricated beam at a certain distance, and is positioned at 11 tops, the edge of a wing of said precast beam 1.The present invention constitutes a superimposed bridge through precast beam 1 and prefabricated diaphragm 3 with cast-in-place part 2, makes the bridge lightness, and reasonable stress not only can be accelerated speed of application, also can reduce cost significantly.
Referring to Fig. 1, in the foregoing description that the present invention provides, web 12 upper surfaces of said inverted T-shaped precast beam 1 longitudinally vertically are embedded with bar dowel or angle steel 13, and bar dowel or angle steel 13 upper ends are imbedded in the concrete of cast-in-place plate 22.Said reinforcing bar or angle steel 13 can improve being connected of precast beam 1 and cast-in-place part 2, satisfy the superposed surfaces shear strength demand of new concrete bonding surface.
Referring to Fig. 1 and Fig. 4 and Figure 10; In the foregoing description that the present invention provides; Longitudinally bury down the parabolic elongated no bonding prestress steel strand 14 that are with sleeve pipe in the said inverted T-shaped precast beam 1 beam body underground; Steel strand 14 levels of exposing precast beam are embedded in the cast-in-place part 2, and the steel strand two ends are anchored in the beam-ends face.Said steel strand 14 can solve the weak problem of Longspan Bridge sloping section cracking resistance.
Referring to Fig. 2, Fig. 3, Fig. 7, Fig. 8, in the foregoing description that the present invention provides, cast-in-place plate 21 bottom surfaces between two precast beams 1 are provided with steel sheet 5, and said steel plate 5 is the flat die mould galvanized steel plain sheet 51 of remaining silent, and is as shown in Figure 7.The self-bearing type steel bar girder permanent template 52 that said steel plate 5 is interrupted at the precast beam place; Thereby a large amount of supports in bottom that saved as shown in Figure 8, above-mentioned steel sheet galvanized steel plain sheet 51 and 52 can be used as permanent formwork, need not dismounting; Easy construction; In addition, the overall performance that self-bearing type steel bar girder permanent template can also reinforcement plate divides secondary to water the old and new's concrete bonding surface when smashing, certain cast-in-place plate also can adopt the cast-in-place plate of traditional formwork.
Referring to Fig. 2, Fig. 3 and Fig. 6; In the foregoing description that the present invention provides; All embedding at the bottom of the plate face of said cast-in-place plate 21 and the plate have a two-way concrete slab 23; Be embedded with longitudinal reinforcement 25 in the cast-in-place superimposed part in beam top and the cast-in-place part stirrup 24 in diaphragm 3 tops, said plate muscle is as the stressed and anti-distributing bar that shrinks of plate.
Referring to Fig. 5, Fig. 6, Fig. 9; In the foregoing description that the present invention provides; Groove 31 is vertically left at said diaphragm 3 two ends; Diaphragm 3 bottoms vertically are provided with through hole 32, are installed with prestress wire or reinforcing bar 4 in the through hole 32, are filled with concrete in 1 of prefabricated diaphragm 3 and precast beam and diaphragm 3 through holes 32.Concrete is cast in diaphragm 3 with precast beam 1, form a beam type overall structure, make adjacent beams collaborative with, prefabricated diaphragm adopts plate or inverted T-shaped.
The job practices of the superimposed bridge of integral precast that provides according to the present invention may further comprise the steps:
A, inverted T-shaped precast beam lifting is held on the bridge pier bent cap;
B, installation diaphragm 3 wear steel strand or reinforcing bar in diaphragm;
C, the laying permanent galvanized steel template of floor or formwork;
Placing of reinforcement at the bottom of D, the colligation plate;
E, water the thick first floor concrete of tamping iron 50-70mm;
After F, concrete reached certain intensity, the un-bonded prestressed steel strand of stretch-draw un-bonded prestressed steel strand and diaphragm 3 bottoms was also used the ground tackle anchoring;
Placing of reinforcement and beam top, diaphragm upper reinforcement on G, the colligation plate
H, the disposable tamping iron remainder concrete that waters;
I, remove all templates, accomplish superimposed continuous bridge.
The described diaphragm of step B is worn the ordinary steel twisted wire when adopting the inverted T-shaped diaphragm in its hole, the grouting between the bottom flange of inverted T-shaped and precast beam web of its steel strand tension is watered afterwards and at the floor concrete and carried out before smashing.
The bridge that above-mentioned job practices of the present invention is accomplished, speed is fast, and cost is low.
Claims (8)
1. the superimposed bridge of the integral precast of a freely-supported; Comprise inverted T-shaped prestressing force precast beam part, cast-in-place part and diaphragm; It is characterized in that said cast-in-place part comprises the cast-in-place superimposed part of cast-in-place plate and beam top, inverted T-shaped prestressing force precast beam bottom flange and web top all are embedded with the pretensioned prestressing steel strand, and said diaphragm is a precast plate; Said diaphragm reaches at the beam two ends and longitudinally is arranged at a certain distance between the web of contiguous prefabricated beam, and is positioned at the top, the edge of a wing of said precast beam.
2. superimposed bridge as claimed in claim 1 is characterized in that the web upper surface of said precast beam longitudinally vertically is embedded with bar dowel or angle steel, and bar dowel or angle steel upper end are imbedded in the concrete of cast-in-place plate.
3. superimposed bridge as claimed in claim 1 is characterized in that longitudinally burying down the parabolic elongated no bonding prestress steel strand that are with sleeve pipe underground in the beam body of said precast beam, and steel strand two client links that expose precast beam have ground tackle and are anchored in beam end.
4. superimposed bridge as claimed in claim 1; It is characterized in that the cast-in-place plate bottom surface between two precast beams is provided with steel sheet; Said steel sheet is the flat die mould galvanized steel plain sheet of remaining silent, or the self-bearing type steel bar girder permanent template of forming for steel bar continuous truss and the galvanized steel plain sheet that is interrupted at the precast beam place.
5. superimposed bridge as claimed in claim 1 is characterized in that all embedding at the bottom of plate face and the plate of said cast-in-place plate two-way concrete slab being arranged, and is embedded with longitudinal reinforcement in the cast-in-place superimposed part in beam top and the cast-in-place part stirrup in diaphragm top.
6. superimposed bridge as claimed in claim 1; It is characterized in that said diaphragm is flat board or inverted T shaped plate, groove is vertically left at its two ends, and the diaphragm bottom vertically is provided with through hole; Be installed with prestress wire or reinforcing bar in the through hole, be filled with concrete between prefabricated diaphragm and precast beam and in the diaphragm through hole.
7. the job practices of the superimposed simple bridge of integral precast may further comprise the steps:
A, inverted T-shaped precast beam lifting is held on the bridge pier bent cap;
B, installation diaphragm wear steel strand or reinforcing bar in diaphragm;
C, the laying permanent galvanized steel template of floor or formwork;
Placing of reinforcement at the bottom of D, the colligation plate;
E, water the thick first floor concrete of tamping iron 50-70mm;
After F, concrete reached certain intensity, the un-bonded prestressed steel strand of stretch-draw un-bonded prestressed steel strand and diaphragm bottom was also used the ground tackle anchoring;
Placing of reinforcement and beam top, diaphragm upper reinforcement on G, the colligation plate
H, the disposable tamping iron remainder concrete that waters;
I, remove all templates, accomplish superimposed continuous bridge.
8. job practices as claimed in claim 7; When it is characterized in that the described diaphragm of step B like employing inverted T-shaped diaphragm; Can wear the ordinary steel twisted wire in its hole, its steel strand tension waters in grouting back between the bottom flange of inverted T-shaped and precast beam web and at the floor concrete and carries out before smashing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210295456.6A CN102808372B (en) | 2012-08-20 | 2012-08-20 | The integral precast overlapping bridge of a kind of freely-supported and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210295456.6A CN102808372B (en) | 2012-08-20 | 2012-08-20 | The integral precast overlapping bridge of a kind of freely-supported and construction method |
Publications (2)
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| CN102808372A true CN102808372A (en) | 2012-12-05 |
| CN102808372B CN102808372B (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210295456.6A Active CN102808372B (en) | 2012-08-20 | 2012-08-20 | The integral precast overlapping bridge of a kind of freely-supported and construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105133781A (en) * | 2015-09-20 | 2015-12-09 | 成都育芽科技有限公司 | Novel building load-bearing floor |
| CN107574746A (en) * | 2017-09-08 | 2018-01-12 | 天津城建大学 | Prefabricated bridge space concrete filled steel tube truss combination beamss attachment means and construction method |
| CN111794074A (en) * | 2020-07-07 | 2020-10-20 | 浙江华东工程咨询有限公司 | Arch bridge concrete beam and beam forming method thereof |
| CN114606860A (en) * | 2022-02-15 | 2022-06-10 | 中铁十五局集团有限公司 | Bridge deck construction method using superposed beam and crossbeam |
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| EP0744511A1 (en) * | 1995-05-24 | 1996-11-27 | Rector S.A. | Prestressed concrete beam and process for making the same |
| JP2006316580A (en) * | 2005-05-16 | 2006-11-24 | Ps Mitsubishi Construction Co Ltd | Corrugated steel plate web pc composite beam and construction method of bridge using corrugated steel plate web pc composite beam |
| CN101538831A (en) * | 2009-03-23 | 2009-09-23 | 宏润建设集团股份有限公司 | Post-poured hidden coping construction method for converting simply supported beams into continuous beams |
| CN101942808A (en) * | 2010-09-30 | 2011-01-12 | 长沙理工大学 | Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section |
| FR2962066A1 (en) * | 2010-07-02 | 2012-01-06 | Conseil Service Investissements | Method for manufacturing structural prefabricated concrete element i.e. beam, in bay cover, involves pouring concrete in longitudinal casing that is made of ultra high performance fiber concrete and fixed at reinforcement |
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2012
- 2012-08-20 CN CN201210295456.6A patent/CN102808372B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744511A1 (en) * | 1995-05-24 | 1996-11-27 | Rector S.A. | Prestressed concrete beam and process for making the same |
| JP2006316580A (en) * | 2005-05-16 | 2006-11-24 | Ps Mitsubishi Construction Co Ltd | Corrugated steel plate web pc composite beam and construction method of bridge using corrugated steel plate web pc composite beam |
| CN101538831A (en) * | 2009-03-23 | 2009-09-23 | 宏润建设集团股份有限公司 | Post-poured hidden coping construction method for converting simply supported beams into continuous beams |
| FR2962066A1 (en) * | 2010-07-02 | 2012-01-06 | Conseil Service Investissements | Method for manufacturing structural prefabricated concrete element i.e. beam, in bay cover, involves pouring concrete in longitudinal casing that is made of ultra high performance fiber concrete and fixed at reinforcement |
| CN101942808A (en) * | 2010-09-30 | 2011-01-12 | 长沙理工大学 | Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105133781A (en) * | 2015-09-20 | 2015-12-09 | 成都育芽科技有限公司 | Novel building load-bearing floor |
| CN107574746A (en) * | 2017-09-08 | 2018-01-12 | 天津城建大学 | Prefabricated bridge space concrete filled steel tube truss combination beamss attachment means and construction method |
| CN111794074A (en) * | 2020-07-07 | 2020-10-20 | 浙江华东工程咨询有限公司 | Arch bridge concrete beam and beam forming method thereof |
| CN111794074B (en) * | 2020-07-07 | 2022-03-22 | 浙江华东工程咨询有限公司 | Arch bridge concrete beam and beam forming method thereof |
| CN114606860A (en) * | 2022-02-15 | 2022-06-10 | 中铁十五局集团有限公司 | Bridge deck construction method using superposed beam and crossbeam |
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| CN102808372B (en) | 2016-10-05 |
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Address after: Jiangdong District Baizhang road 315000 in Zhejiang province Ningbo City Exhibition Center No. 168 28C Applicant after: Yang Zhong Applicant after: Yang Feng Address before: 315000, AUX Road, No. 757 Li RI Road, Yinzhou District, Ningbo, Zhejiang, 502 Applicant before: Yang Zhong Applicant before: Yang Feng |
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