CN109610350A - A kind of ruggedized construction of prestressed concrete box girder - Google Patents
A kind of ruggedized construction of prestressed concrete box girder Download PDFInfo
- Publication number
- CN109610350A CN109610350A CN201811631810.1A CN201811631810A CN109610350A CN 109610350 A CN109610350 A CN 109610350A CN 201811631810 A CN201811631810 A CN 201811631810A CN 109610350 A CN109610350 A CN 109610350A
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- China
- Prior art keywords
- prestressed concrete
- concrete box
- box girder
- steel
- channel steel
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The present invention relates to a kind of ruggedized constructions of prestressed concrete box girder, for reinforcing original prestressed concrete box girder, including channel steel, angle steel, anchor bolt；Channel steel is fixed on the abdomen of original prestressed concrete box girder, top, on bottom plate, by channel steel aperture, channel steel is fixed on prestressed concrete box girder with the anchor bolt being embedded on former prestressed concrete box girder, with the mode of welding that the channel steel welding on abdomen, top, bottom plate is integral, the position of welding forms weld seam, and two angle steel are one group, totally two groups, each group of angle steel is parallel to each other at " V " type, two groups of angle steel, and is fixedly mounted between upper and lower two channel steels.The present invention is by adding steelframe, improve the global sections rigidity of box beam, so that box beam stress is more uniform, effect of the steelframe as rigid support is played, structure holistic resistant behavior improves, and easy construction, solve the problems such as method is complicated, difficulty of construction is big, self weight increase is big present in existing box beam reinforcing.
Description
Technical field
The invention belongs to bridge strengthening field, specially a kind of prestressed concrete box girder transversely strengthening structure.
Background technique
With the development of Chinese national economy, car ownership is continuously increased, and vehicle develops to heavy-duty, is built in the past
Partial Bridges, bearing capacity have been unable to meet the needs of Modern Traffic, multiple diseases occur, influence the safety that bridge uses
Property.Bridge must be reinforced.
The crack of concrete structure is the initial imperfection of inside of solid material, is a kind of discontinuous phenomenon.Belong to structure
Strength theory scope.There are many factor for causing concrete structure to crack, and emphasis different classifications are also different.To the Bridge Crack origin cause of formation
Careful analysis, be the basis for judging Bridge Crack risk and how being prevented it and be reinforced；If not fracture
By meticulously dissecting research, is just at will handled for it, do not obtain the good result of anticipation not only, or even also have initiation
A possibility that unexpected incidents, has seriously affected the service life of bridge structure.
It is fewer for the diaphragm plate of the prestressed concrete box-beam bridge of large span, especially box beam setting, in load
Under effect, the deformation of concrete box girder meets classical theory peripheral rigid it is assumed that can cause to distort.Web will appear vertically certainly
Direct stress.The web horizontal fracture as caused by vertical direct stress, it is general concentrate appear in end bay support near zone and in across
Region between the 1/4~3/4 of single span length all occurs in web upper limb substantially.Since the practical distortion of box beam does not meet rigidity
It is assumed that tank wall is than relatively thin, diaphragm plate is very little on periphery, too small to torsional restraint, can generate distortion deformation.
For the various cracks that bridge generates, existing reinforcement means mainly has following 8 kinds: 1, bridge strengthening course reinforcing side
Method；2, prestressing；3, sticking carbon fiber piece method for strengthening；4, affixing steel plate reinforcement method；5, reinforced with external steel encased；6, increase
Section and arrangement of reinforcement method for strengthening；7, increase strengthening member method；8, change structure stress system method for strengthening.The specific reinforcement means of bridge
Comprehensively careful analysis should be carried out according to Causes of Cracking, each regio defect, economic effect of bridge etc. are many-sided, select above-mentioned one
Kind or a variety of reinforcement means.The prior art is primarily present following both sides problem: although the 1, technology that has is to the crack of bridge
Prevent the effect that can have been played, but the method reinforced is complicated, difficulty of construction is high, it is also bad in economic effect.2, most to add
Gu technology carries out reinforcing prevention both for the diagonal crack of bridge, the horizontal fracture of bridge is not accounted for.
Summary of the invention
It is an object of the invention to aiming at the problems existing in the prior art, propose a kind of cross of prestressed concrete box girder
To reinforcement means.The present invention improves the global sections rigidity of box beam by adding steelframe, so that box beam stress is more uniformly,
Effect of the steelframe as rigid support is played, and structure holistic resistant behavior improves.And the method reinforced is simple, construction
It is convenient, economical height.
The present invention is realized by following technical method:
A kind of ruggedized construction of prestressed concrete box girder, for reinforcing original prestressed concrete box girder 1, feature exists
In: including channel steel 2, angle steel 3, anchor bolt 5；Channel steel 2 is fixed on the abdomen of original prestressed concrete box girder 1, top, on bottom plate, it will
Channel steel 2 is fixed in prestressed concrete box girder with the anchor bolt 5 being embedded on former prestressed concrete box girder 1 by 2 aperture of channel steel
On 1, the channel steel 2 on abdomen, top, bottom plate is welded to integral, the position formation weld seam 4 of welding, two angle steel 3 with the mode of welding
It is one group, totally two groups, each group of angle steel is parallel to each other at " V " type, two groups of angle steel 3, and is fixedly mounted on upper and lower two channel steels 2
Between.
Channel steel 2 can also be fixed on former prestressed concrete box girder 1 using bonding method.
Region between the 1/4~3/4 of prestressed concrete box girder single span longitudinal length is used for together every 2 meters of increases
Improve the lateral stiffness of prestressed concrete box girder and the prestressed concrete box girder ruggedized construction of torsional restraint.
The aperture on channel steel 2, position is on the middle line of channel steel 2, and at equidistantly distributed.
The pad of the contact area of channel steel 2 and angle steel 3 can also be arranged to add between angle steel 3 and the edge of a wing of channel steel 2
Plate 7 is fixedly connected by bolt 6 between angle steel 3 and channel steel 2, can also be riveted.
The present invention provides a kind of novel prestressed concrete box girder transversely strengthening structure.Closed steelframe can increase bridge
The lateral stiffness of beam can effectively improve the holistic resistant behavior of prestressed concrete box girder, improve the stress of web.It will
Channel steel is pasted onto the abdomen of prestressed concrete box girder, top with epoxy resin mortar, on bottom plate, and is anchored with anchor bolt.With bolt by angle steel
It is fixed on channel steel up and down, increases the overall stiffness of steelframe, improve stress performance.Due to increasing steelframe, the transverse direction of box beam is just
Degree and holistic resistant behavior will be greatly improved.Prestressed concrete box girder is reinforced using this method, construction is simple is applied
Expenses of labour is also little to the self weight increase of beam with low.
" V " font web member among steelframe is that angle steel is connected with bolt with the edge of a wing of channel steel made of angle steel, is formed
Two groups of " V " font web members, two groups of web member parallel arrangements.
The utility model has the advantages that
1, the global sections rigidity of box beam is improved after reinforcing, laterally each beam stress more uniformly, has played steelframe conduct
The effect of rigid support, and structure holistic resistant behavior improves.
2, the method reinforced is simple, easy for construction, economical height.
Detailed description of the invention
Fig. 1, steelframe reinforce prestressed concrete box beams structure transverse face figure
Fig. 2, steelframe reinforce prestressed concrete box beams structure skiagraph
Fig. 3, partial schematic diagram
Wherein: 1, concrete box girder, 2, channel steel, 3, angle steel, 4, weld seam, 5, anchor bolt, 6, bolt, 7, backing plate.
Specific embodiment
This programme is described in further details with reference to the accompanying drawing:
Channel steel 2 is pasted onto originally when being reinforced with epoxy resin mortar by prestressed concrete box girder as shown in Figure 1
The abdomen of prestressed concrete box girder 1, top, on bottom plate.By 2 aperture of channel steel, with the anchor being embedded on former prestressed concrete box beams 1
Channel steel 2 is fixed on prestressed concrete box girder 1 by fixing bolt 5, is welded the channel steel 2 on abdomen, top, bottom plate with the mode of welding
Integral, the position of welding forms weld seam 4.In channel steel 2 with backing plate 7 is arranged between angle steel 3, the bolt 6 of angle steel 3 is fixed in slot
On steel 2.Region between the 1/4~3/4 of prestressed concrete box girder single span longitudinal length increases by one of prestressing force every 2 meters and mixes
The ruggedized construction of solidifying soil box beam, can form multiple reinforcement elements.
As described above, being just able to achieve the present invention.
Claims (5)
1. a kind of ruggedized construction of prestressed concrete box girder, for reinforcing original prestressed concrete box girder 1, feature exists
In: including channel steel 2, angle steel 3, anchor bolt 5；Channel steel 2 is fixed on the abdomen of original prestressed concrete box girder 1, top, on bottom plate, it will
Channel steel 2 is fixed in prestressed concrete box girder with the anchor bolt 5 being embedded on former prestressed concrete box girder 1 by 2 aperture of channel steel
On 1, the channel steel 2 on abdomen, top, bottom plate is welded to integral, the position formation weld seam 4 of welding, two angle steel 3 with the mode of welding
It is one group, totally two groups, each group of angle steel is parallel to each other at " V " type, two groups of angle steel 3, and is fixedly mounted on upper and lower two channel steels 2
Between.
2. requiring a kind of ruggedized construction of prestressed concrete box girder according to right 1, it is characterised in that: can also use
Channel steel 2 is fixed on former prestressed concrete box girder 1 by bonding method.
3. requiring a kind of ruggedized construction of prestressed concrete box girder according to right 1, it is characterised in that: mixed in prestressing force
Region between the 1/4~3/4 of solidifying soil box beam single span longitudinal length, increases together every 2 meters for improving prestressed concrete box
The lateral stiffness of beam and the prestressed concrete box girder ruggedized construction of torsional restraint.
4. requiring a kind of ruggedized construction of prestressed concrete box girder according to right 1, it is characterised in that: described in slot
Aperture on steel 2, position is on the middle line of channel steel 2, and at equidistantly distributed.
5. requiring a kind of ruggedized construction of prestressed concrete box girder according to right 1, it is characterised in that: can also be at angle
Be arranged to add to the backing plate 7 of the contact area of channel steel 2 and angle steel 3 between steel 3 and the edge of a wing of channel steel 2, angle steel 3 and channel steel 2 it
Between be fixedly connected by bolt 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631810.1A CN109610350A (en) | 2018-12-29 | 2018-12-29 | A kind of ruggedized construction of prestressed concrete box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631810.1A CN109610350A (en) | 2018-12-29 | 2018-12-29 | A kind of ruggedized construction of prestressed concrete box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109610350A true CN109610350A (en) | 2019-04-12 |
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ID=66011007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811631810.1A Pending CN109610350A (en) | 2018-12-29 | 2018-12-29 | A kind of ruggedized construction of prestressed concrete box girder |
Country Status (1)
| Country | Link |
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| CN (1) | CN109610350A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735387A (en) * | 2019-11-04 | 2020-01-31 | 河南省交通规划设计研究院股份有限公司 | Transverse connection device for small box girders of bridge and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0425364A1 (en) * | 1989-10-24 | 1991-05-02 | Jean Muller International | Station on a railway or other line, situated on a viaduct |
| JP2007092392A (en) * | 2005-09-29 | 2007-04-12 | Sho Bond Constr Co Ltd | Hinge portion repairing structure of concrete construction |
| CN202227254U (en) * | 2011-06-30 | 2012-05-23 | 广东工业大学 | Structure for reinforcing prestressed concrete box beam by horizontal reinforced steel frame |
| CN104233963A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Prestress-adjustable steel truss for reinforcing PSC (prestressed concrete) continuous box girder bridge and construction method |
| CN107938525A (en) * | 2017-12-20 | 2018-04-20 | 山西省交通规划勘察设计院 | A kind of ruggedized construction and its method of assembled continuous box girder |
| CN208266707U (en) * | 2018-05-15 | 2018-12-21 | 李旺兴 | A kind of prefabricated box -beam segment chamber bracing means |
-
2018
- 2018-12-29 CN CN201811631810.1A patent/CN109610350A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0425364A1 (en) * | 1989-10-24 | 1991-05-02 | Jean Muller International | Station on a railway or other line, situated on a viaduct |
| JP2007092392A (en) * | 2005-09-29 | 2007-04-12 | Sho Bond Constr Co Ltd | Hinge portion repairing structure of concrete construction |
| CN202227254U (en) * | 2011-06-30 | 2012-05-23 | 广东工业大学 | Structure for reinforcing prestressed concrete box beam by horizontal reinforced steel frame |
| CN104233963A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Prestress-adjustable steel truss for reinforcing PSC (prestressed concrete) continuous box girder bridge and construction method |
| CN107938525A (en) * | 2017-12-20 | 2018-04-20 | 山西省交通规划勘察设计院 | A kind of ruggedized construction and its method of assembled continuous box girder |
| CN208266707U (en) * | 2018-05-15 | 2018-12-21 | 李旺兴 | A kind of prefabricated box -beam segment chamber bracing means |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735387A (en) * | 2019-11-04 | 2020-01-31 | 河南省交通规划设计研究院股份有限公司 | Transverse connection device for small box girders of bridge and construction method thereof |
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Application publication date: 20190412 |