CN201180254Y - Simply supported box girder - Google Patents
Simply supported box girder Download PDFInfo
- Publication number
- CN201180254Y CN201180254Y CNU2008200799989U CN200820079998U CN201180254Y CN 201180254 Y CN201180254 Y CN 201180254Y CN U2008200799989 U CNU2008200799989 U CN U2008200799989U CN 200820079998 U CN200820079998 U CN 200820079998U CN 201180254 Y CN201180254 Y CN 201180254Y
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- web
- box beam
- supported box
- presstressed reinforcing
- right sides
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Abstract
The utility model discloses a simply supported box beam, which comprises a top slab, a left web plate, a right web plate and a bottom slab, wherein the cross section of the box beam is a single-box single-chamber cross section that the left web plate and the right web plate are inclined web plates and have large chamfer angles. The simply supported box beam has simple and definite force bearing, concise form, and beautiful appearance. The single-box single-chamber full-span simply supported box beam has a closed cross section, can provide larger bending and torsional rigidities needed by high-speed driving, and has good durability. The simply supported box beam has a full pre-stressing structure, the beam body is always in a pressed state under the action of operating load, and a built bridge has small maintenance workload. The simply supported box beam adopts a full-span prefabrication process; compared with a cast-in-place beam, the simply supported box beam can shorten construction period and reduce temporary support cost. An integral hydraulic internal mold and strip die tensioning process are fully taken into consideration and adopted in the design of the cross section; and the simply supported box beam has programmable construction links, which contributes to the improvement of working efficiency and assurance of he quality.
Description
Technical field
The utility model relates to the bridge field, particularly relates to a kind of simple supported box beam.
Background technology
The post stressed concrete simple supported box beam is used comparatively extensive in China, a large amount of employings is split blade type freely-supported T beam on Existing Railway Line, below the design road speed 200km/h.It is fast that the passenger dedicated railway line of speed per hour more than 250 kilometers has speed, to the demanding characteristics of infrastructure under line track ride comfort, the line, design for bridge construction just can not only be confined to the static(al) design, must take all factors into consideration the acting in conjunction of rolling stock, circuit, bridge, safety and driving comfort index, bridge dynamic response according to rolling stock limit vertical, the Transverse Stiffness Limit of controlling bridge, carry out the power design.
The utility model content
The purpose of this utility model provides a kind of good integrity that has, and is perpendicular, lateral stiffness is big, the torsional property height, and structure durability can wait the simple supported box beam of characteristics well.
For achieving the above object, on the one hand, the technical solution of the utility model provides a kind of simple supported box beam, comprises top board, left and right sides web and base plate, and the cross section of described case beam is the single box single chamber cross section that described left and right sides web adopts oblique web, big chamfering.
Wherein, the gradient of described left and right sides web is between 1: 10～1: 3; The outer chamfer radius of described top board and web junction, the described left and right sides is 200～1500mm, and the interior chamfering of described top board and web junction, the described left and right sides is provided with vertical chamfering, and the following chamfer radius of described left and right sides web and described base plate intersection is 100～300mm.
Wherein, described simple supported box beam spaning middle section top board, base plate thickness 250～300mm, described left and right sides web thickness 350～500mm; Described simple supported box beam end section top board, base plate thickness 500～700mm, described left and right sides web thickness 800～1100mm.
Wherein, be provided with the web presstressed reinforcing steel in the web of the described left and right sides, the mid portion of described web presstressed reinforcing steel is arranged on the bottom of described web, and described web presstressed reinforcing steel begins to bend up at described mid portion horizontal segment two ends, bends up to the two ends of beam along described web; Be provided with the baseboard prestress muscle in the described base plate.
Wherein, it is different that the by-level section and the two ends of described web presstressed reinforcing steel bend up segment length, evenly is anchored in the beam-ends of described left and right sides web after the web presstressed reinforcing steel bends up.
Wherein, the angle that bends up of the described web presstressed reinforcing steel section of bending up is 4～12 °.
Wherein, described web presstressed reinforcing steel is set to single pipeline or double pipeline.
Wherein, when described web presstressed reinforcing steel is set to double pipeline, every bundle presstressed reinforcing steel radical adopts 7-7 φ 5～13-7 φ 5, wherein, φ 5 refers to that diameter is the steel wire of 5mm, the standard steel section twisted wire that 7 φ 5 refer to by 7 φ, 5 steel wire twistings, the steel strand of 77 φ 5 of 7-7 φ 5 expressions, the steel strand of 13 7 φ 5 of 13-7 φ 5 expressions.
Wherein, when described web presstressed reinforcing steel is set to single pipeline, every bundle presstressed reinforcing steel radical adopts 12-7 φ 5～27-7 φ 5, wherein, φ 5 refers to that diameter is the steel wire of 5mm, the standard steel section twisted wire that 7 φ 5 refer to by 7 φ, 5 steel wire twistings, the steel strand of 12 7 φ 5 of 12-7 φ 5 expressions, the steel strand of 27 7 φ 5 of 27-7 φ 5 expressions.
Technique scheme only is an optimal technical scheme of the present utility model, has following advantage: the section form of simple supported box beam adopts the single box single chamber cross section, and section form is succinct, stressed clear and definite, and construction operation space is big.The beam-ends partition wall adopts the gradual change form, is convenient to the realization of automation internal mold, and stripping rate is fast, and maintenance is convenient.Presstressed reinforcing steel adopts the end, web arrangement of reinforcement scheme respectively.Double pipeline method for arranging adopts less tonnage stretch-draw system, and pipe arrangement is flexible, and construction equipment is selected easy to operate.Single pipeline method for arranging adopts the large-tonnage ground tackle, optimizes the prestress pipe arrangement space, reduces number of tubes, reduces the pipeline cavity effect, the saving end, web engineering quantity; Simplify stretch-draw, mud jacking, each procedure of sealing off and covering anchorage.Manufacture method adopts whole opening prefabricated method of setting up, and prestressing adopts three stage stretching modes, and mould stretch-draw promptly is with in pre-stretch-draw after internal mold unclamps, effectively avoid the generation of early-age shrinkage crackle.The mode that hole for hoist is set at bridge deck is adopted in the lifting of beam body, saves the suspender built-in fitting, reduces construction costs.Fitting operation carries out in case, construction safety, facility.
Description of drawings
Fig. 1 is that 1/2 presstressed reinforcing steel of a kind of simple supported box beam of the utility model embodiment is vertically arranged schematic diagram;
Fig. 2 is that 1/4 presstressed reinforcing steel of a kind of simple supported box beam of the utility model embodiment is vertically arranged schematic diagram;
Fig. 3 is the double pipeline presstressed reinforcing steel lateral arrangement schematic diagram of a kind of simple supported box beam of the utility model embodiment;
Fig. 4 is the single pipeline presstressed reinforcing steel lateral arrangement schematic diagram of a kind of simple supported box beam of the utility model embodiment.
Wherein, L1: top board; L21, L22: left and right sides web; L23, L24: left and right sides web presstressed reinforcing steel; L3: base plate; L31: base plate span centre presstressed reinforcing steel; L32: bottom end ground tackle.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.
Fig. 1 is that 1/2 presstressed reinforcing steel of a kind of simple supported box beam of the utility model embodiment is vertically arranged schematic diagram, and rightmost side solid line is represented the girder span center line; Fig. 2 is that 1/4 presstressed reinforcing steel of a kind of simple supported box beam of the utility model embodiment is vertically arranged schematic diagram, and this figure has only shown the position of baseboard prestress muscle, and rightmost side solid line is represented the girder span center line, and the lowermost end solid line is represented beam body center line; Fig. 3 is the double pipeline presstressed reinforcing steel lateral arrangement schematic diagram of a kind of simple supported box beam of the utility model embodiment, and the dotted line left side is a span centre interface schematic diagram, and the right side is the beam-ends schematic cross-section; Fig. 4 is the single pipeline presstressed reinforcing steel lateral arrangement schematic diagram of a kind of simple supported box beam of the utility model embodiment, and the dotted line left side is a span centre interface schematic diagram, and the right side is the beam-ends schematic cross-section.
In conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, simple supported box beam of the present utility model comprises top board L1, left and right sides web L21, L22 and base plate L3, and the section form of case beam adopts the single box single chamber cross section of oblique web, big chamfering.The gradient of left and right sides web L21, L22 is between 1: 10～1: 3; The outer chamfer radius of top board L1 and left and right sides web L21, L22 junction is 200～1500mm; The interior chamfering of top board L1 and left and right sides web L21, L22 junction is provided with vertical chamfering; The following chamfer radius of left and right sides web L21, L22 and base plate L3 intersection is 100～300mm.Described case girder span middle section top board, base plate thickness 250～300mm, web thickness 350～500mm; Beam-ends cross section top board, base plate thickness 500～700mm, web thickness 800～1100mm.
Be provided with left and right sides web presstressed reinforcing steel L23, L24 among left and right sides web L21, the L22; The mid portion of described left and right sides web presstressed reinforcing steel L23, L24 is arranged on the bottom of described left and right sides web, and described left and right sides web presstressed reinforcing steel L23, L24 begin to bend up at described mid portion horizontal segment two ends, bend up to the two ends of beam along described left and right sides web; In the described base plate presstressed reinforcing steel is set.
In left and right sides web L21, L22, left and right sides web presstressed reinforcing steel L23, L24 are set to bend up respectively, and it is different that the by-level section and the two ends of presstressed reinforcing steel bend up segment length, evenly is anchored in the beam-ends web after presstressed reinforcing steel bends up.It is 4～12 ° that presstressed reinforcing steel bends up the angle that muscle bends up.Left and right sides web presstressed reinforcing steel L23, L24 arrange and can be set to single pipeline or double pipeline as required.The tonnage of left and right sides web presstressed reinforcing steel L23, L24 is according to arranging the needs selection, when double pipeline is set, can adopt tonnage commonly used, every bundle presstressed reinforcing steel radical can adopt 7-7 φ 5～13-7 φ 5, wherein, φ 5 refers to that diameter is the steel wire of 5mm, the standard steel section twisted wire that 7 φ 5 refer to by 7 φ, 5 steel wire twistings, the steel strand of 77 φ 5 of 7-7 φ 5 expressions, the steel strand of 13 7 φ 5 of 13-7 φ 5 expressions; When adopting single pipeline, can adopt than the large-tonnage ground tackle.Every bundle presstressed reinforcing steel radical can adopt 12-7 φ 5～27-7 φ 5, and wherein, φ 5 refers to that diameter is the steel wire of 5mm, the standard steel section twisted wire that 7 φ 5 refer to by 7 φ, 5 steel wire twistings, the steel strand of 12 7 φ 5 of 12-7 φ 5 expressions, the steel strand of 27 7 φ 5 of 27-7 φ 5 expressions.
The manufacture method of simple supported box beam adopts whole opening prefabricated method of setting up, and exterior sheathing is installed on pedestal, with colligation is good cage of reinforcement movement to model, and after internal mold and end mould are installed, concreting once on pedestal, beam body concrete one-time-concreting is finished, and integrality performance of the structure is good.Carry out stream curing or natural curing after the placing of beam body concrete is finished, the demoulding and prestressing time are determined according to beam body concrete gain in strength situation.After applying prestressing force, whole lifting or traversing to depositing the beam pedestal.Prestressing adopts three stage stretching modes, and mould stretch-draw promptly is with in pre-stretch-draw after internal mold unclamps, effectively avoid the generation of early-age shrinkage crackle; Initial tensioning back rest body can bear deadweight, can accelerate the pedestal turnover.The hanging method of simple supported box beam adopts top board that the mode of hole for hoist is set, and every end is provided with 4 suspension centres, near the web setting.The mode that hole for hoist is set at bridge deck is adopted in the lifting of beam body, saves the suspender built-in fitting, reduces construction costs.Fitting operation carries out in case, construction safety, facility.
As can be seen from the above embodiments, the form of structure that the simple supported box beam of the utility model embodiment adopts large-angle inclined web, long radius chamfering and beam-ends cross section to thicken to the inside, stressed simple, clear and definite, form is succinct, the streamline effect is obvious, associative perception is strong, and landscape effect is good.The beam-ends partition wall adopts the gradual change form, is convenient to the realization of automation internal mold, and stripping rate is fast, and maintenance is convenient.The whole hole of single box single chamber simple supported box beam is the cross section of remaining silent, and can provide needed bigger bending resistance of high speed traveling and torsional rigidity, good endurance.The full prestressing structure, under the operation load action, the beam body is in pressured state all the time, and the bridge maintenance workload after building up is little.Adopt whole opening prefabricated technology, compare, can shorten the construction period, reduce interim support expense with cast-in-place beam.Design of section takes into full account and adopts whole hydraulic internal mold and band mould tensioning process, and the construction link sequencing helps improving work efficiency and ensures the quality of products.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (9)
1, a kind of simple supported box beam is characterized in that, comprises top board, left and right sides web and base plate, and the cross section of described case beam is the single box single chamber cross section that described left and right sides web adopts oblique web, big chamfering.
2, simple supported box beam as claimed in claim 1 is characterized in that, the gradient of described left and right sides web is between 1: 10～1: 3; The outer chamfer radius of described top board and web junction, the described left and right sides is 200～1500mm, and the interior chamfering of described top board and web junction, the described left and right sides is provided with vertical chamfering, and the following chamfer radius of described left and right sides web and described base plate intersection is 100～300mm.
3, simple supported box beam as claimed in claim 2 is characterized in that, described simple supported box beam spaning middle section top board, base plate thickness 250～300mm, described left and right sides web thickness 350～500mm; Described simple supported box beam end section top board, base plate thickness 500～700mm, described left and right sides web thickness 800～1100mm.
4, simple supported box beam as claimed in claim 3, it is characterized in that, be provided with the web presstressed reinforcing steel in the web of the described left and right sides, the mid portion of described web presstressed reinforcing steel is arranged on the bottom of described web, described web presstressed reinforcing steel begins to bend up at described mid portion horizontal segment two ends, bends up to the two ends of beam along described web; Be provided with the baseboard prestress muscle in the described base plate.
5, simple supported box beam as claimed in claim 4 is characterized in that, it is different that the by-level section and the two ends of described web presstressed reinforcing steel bend up segment length, evenly is anchored in the beam-ends of described left and right sides web after the web presstressed reinforcing steel bends up.
6, simple supported box beam as claimed in claim 5 is characterized in that, the angle that the described web presstressed reinforcing steel section of bending up bends up is 4～12 °.
7, simple supported box beam as claimed in claim 6 is characterized in that, described web presstressed reinforcing steel is set to single pipeline or double pipeline.
8, simple supported box beam as claimed in claim 7, it is characterized in that, when described web presstressed reinforcing steel is set to double pipeline, every bundle presstressed reinforcing steel radical adopts 7-7 φ 5～13-7 φ 5, wherein, φ 5 refers to that diameter is the steel wire of 5mm, the standard steel section twisted wire that 7 φ 5 refer to by 7 φ, 5 steel wire twistings, the steel strand of 77 φ 5 of 7-7 φ 5 expressions, the steel strand of 13 7 φ 5 of 13-7 φ 5 expressions.
9, simple supported box beam as claimed in claim 8, it is characterized in that, when described web presstressed reinforcing steel is set to single pipeline, every bundle presstressed reinforcing steel radical adopts 12-7 φ 5～27-7 φ 5, wherein, φ 5 refers to that diameter is the steel wire of 5mm, the standard steel section twisted wire that 7 φ 5 refer to by 7 φ, 5 steel wire twistings, the steel strand of 12 7 φ 5 of 12-7 φ 5 expressions, the steel strand of 27 7 φ 5 of 27-7 φ 5 expressions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200799989U CN201180254Y (en) | 2008-04-17 | 2008-04-17 | Simply supported box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200799989U CN201180254Y (en) | 2008-04-17 | 2008-04-17 | Simply supported box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201180254Y true CN201180254Y (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200799989U Expired - Lifetime CN201180254Y (en) | 2008-04-17 | 2008-04-17 | Simply supported box girder |
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| CN (1) | CN201180254Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046464A (en) * | 2012-12-31 | 2013-04-17 | 中铁第四勘察设计院集团有限公司 | Continuous bridge structure with bridge floor different in width |
| CN103835219A (en) * | 2013-12-21 | 2014-06-04 | 广西科技大学 | Arrangement mode of external cables of corrugated steel web and PC combined box beam |
| CN106284048A (en) * | 2016-08-31 | 2017-01-04 | 中冶南方工程技术有限公司 | Box beam, prestress concrete box beam bridge and the construction method of this box beam |
| CN106760186A (en) * | 2016-12-27 | 2017-05-31 | 北京建筑大学 | Thin wall concrete beam in a kind of prefabricated hollow formula |
| CN106836639A (en) * | 2017-04-11 | 2017-06-13 | 南京工业大学 | FRP box-shaped section-concrete combined beam provided with bidirectional shear keys |
| CN113338161A (en) * | 2021-04-15 | 2021-09-03 | 广东省交通规划设计研究院集团股份有限公司 | Concrete box girder top surface prestress steel beam tensioning structure and construction method thereof |
-
2008
- 2008-04-17 CN CNU2008200799989U patent/CN201180254Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046464A (en) * | 2012-12-31 | 2013-04-17 | 中铁第四勘察设计院集团有限公司 | Continuous bridge structure with bridge floor different in width |
| CN103835219A (en) * | 2013-12-21 | 2014-06-04 | 广西科技大学 | Arrangement mode of external cables of corrugated steel web and PC combined box beam |
| CN106284048A (en) * | 2016-08-31 | 2017-01-04 | 中冶南方工程技术有限公司 | Box beam, prestress concrete box beam bridge and the construction method of this box beam |
| CN106760186A (en) * | 2016-12-27 | 2017-05-31 | 北京建筑大学 | Thin wall concrete beam in a kind of prefabricated hollow formula |
| CN106760186B (en) * | 2016-12-27 | 2019-01-01 | 北京建筑大学 | Thin wall concrete beam in a kind of prefabricated hollow formula |
| CN106836639A (en) * | 2017-04-11 | 2017-06-13 | 南京工业大学 | FRP box-shaped section-concrete combined beam provided with bidirectional shear keys |
| CN106836639B (en) * | 2017-04-11 | 2022-09-23 | 南京工业大学 | FRP box-shaped section-concrete combined beam provided with bidirectional shear keys |
| CN113338161A (en) * | 2021-04-15 | 2021-09-03 | 广东省交通规划设计研究院集团股份有限公司 | Concrete box girder top surface prestress steel beam tensioning structure and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090114 |
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| CX01 | Expiry of patent term |