CN202247707U - Vertical external prestress and steel plate combined reinforcing box girder structure - Google Patents

Vertical external prestress and steel plate combined reinforcing box girder structure Download PDF

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Publication number
CN202247707U
CN202247707U CN2011201960537U CN201120196053U CN202247707U CN 202247707 U CN202247707 U CN 202247707U CN 2011201960537 U CN2011201960537 U CN 2011201960537U CN 201120196053 U CN201120196053 U CN 201120196053U CN 202247707 U CN202247707 U CN 202247707U
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CN
China
Prior art keywords
steel plate
vertical external
case
vertical
box girder
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Expired - Fee Related
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CN2011201960537U
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Chinese (zh)
Inventor
姜海波
陈黎
王浩瀚
龚景森
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Guangdong University of Technology
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Guangdong University of Technology
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Priority to CN2011201960537U priority Critical patent/CN202247707U/en
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Publication of CN202247707U publication Critical patent/CN202247707U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a vertical external prestress and steel plate combined reinforcing box girder structure. When in reinforcing by vertical external prestress, holes 2 and 6 are drilled on a top plate and a bottom plate of a box girder 8 respectively, bottom steel plates 7 with reserved holes are attached to the bottom plate of the box girder, thickened web plates 4 are arranged on the cross section applied with vertical prestress in the box girder and prestress ducts 5 are reserved on the same. Vertical external prestress ribs 1 penetrate through the holes 2, the prestress ducts 5, the holes 6 and the bottom steel plates 7, anchor blocks 3 are cast, the vertical external prestress ribs are tensioned and anchored and are poured with epoxy resin mortar for protection. The vertical external prestress and steel plate combined reinforcing box girder structure has the advantages of capability of improving safety and stability of components and is applicable to reinforcing concrete box girders.

Description

Vertical external prestressing combines the beam construction of steel plate reinforcement case
Technical field
The utility model relates to a kind of vertical external prestressing and combines the beam construction of steel plate reinforcement case, belongs to the bridge strengthening field.
Background technology
Box girder bridge obtains application more and more widely in bridge construction.Built a large amount of Prestressed Continuous Box Beam on the high-grade highway of China, but through after the operation of certain hour, defective and weak link that its structure itself exists come out also, find that present a considerable amount of case web generally ftractures.
Existing adding with method such as affixing steel plate, affixing carbon fabric (plate) material, often can only be improved the intensity of case beam, and be difficult to improve web stress or crack situation.The cracking person also has no lack of precedents to adopt conventional method (as increasing web thickness, affixing steel plate etc.) to reinforce behind the case web once more.The deficiency of bearing shearing, lifting force and isolating pulling force for the case web, the vertical prestressing steel tendon or the fining twisted steel that do not pass web to lay along girder and cantilever diaphragm append prestressing force to it.
The utility model proposes a kind ofly to pass that the case beam is laid and the vertical external prestressing strengthening case beam construction of not passing web along web, can improve the advantage of the security and stability of member, is applicable to reinforced concrete case beam, has characteristics safe and reliable, easy construction.
The utility model content
The technical problem that the utility model will solve is to propose new vertical prestressing to combine the steel plate reinforcement structure, improves the functional performance of case beam, the bearing capacity of raising structure.
So-called vertical external prestressing combines the beam construction of steel plate reinforcement case, is that presstressed reinforcing steel is passed the steel plate that is attached to case beam base plate and is anchored in case back base plate, to recover or to improve a kind of structure of the bearing capacity of original structure.Under the vertical prestressing bar effect; The steel plate of vertical prestressing bar, base plate and former beam form closing structure; Its effect is similar to stirrup and don't destroys original structure; Can obviously improve the cracking resistance of concrete box-beam bridge, reduce or suppress crack and other development of deformations, the crack that control tension of prestressed tendon stress can make concrete box girder is with all or part of closure.Meanwhile, " the stirrup effect " of generation can obviously improve the shear-carrying capacity and the durability of structures of former case beam.Have sectional dimension little, from advantages such as heavy and light,, construction period weak point little, remarkable in economical benefits to the operation of bridge influence.
It is to become " passive reinforcing " demonstrating fully into " initiatively reinforcing " thought that vertical prestressing bar combines the steel plate reinforcement method.It is not pass web at case beam set inside vertical prestressing reinforcing bar, increases compressive pre-stress, with the stress state of active adjusting tank web, improves the stress performance of case beam operational phase; Simultaneously the case beam reinforcement planting of presstressed reinforcing steel section is being set, assembling reinforcement net, the thick concrete of cast 15-20cm with the thickening web, to reduce case wide; Increase impaired rigidity of section; Reduce from focusing on the vertical stress that the outside produces in the web, reduce wide case effect, stop further expanding of web crack; And the steel plate (layer) that increases has disperseed anchor block to act on the pre-applied force of concrete roof and floor, can effectively avoid stress to concentrate.The pre-applied force of surface of steel plate and the effect of cementing agent make steel plate reliably be connected with original structure, have enough adhesion strengths and durability.Through steel plate and the concrete acting in conjunction of former beam, improve its rigidity, initiatively the stress state of adjusting tank beam base plate can directly effectively limit carrying out of crack, improves former case beam steel and concrete stress state, improves the bearing capacity of case beam.
As the further improvement of this structure, the back place that lays the vertical prestressing section in this beam also can set up horizontal steel plate.Laterally steel plate is the band preformed hole, and presstressed reinforcing steel can pass steel plate, and size can be identical with plate bottom horizontal steel plate, significantly strengthens " cuff effect " that presstressed reinforcing steel combines steel plate to form.Can approach at reinforcing bending resistance place steel plate, can be thicker at reinforcing shearing resistance place steel plate, concrete size can be calculated according to the needs that reality is reinforced.
Further improve as this structure, when reinforcing bending resistance place, this beam beam base concrete is set up twice longitudinal fiber cloth (or steel plate) with horizontal steel plate junction.Longitudinal fiber cloth (or steel plate) is the band preformed hole, and its lateral dimension is greater than the web width of thickening, and presstressed reinforcing steel can pass.
Compare with existing subsides steel method reinforcing, the reinforcement means effect of " vertical external prestressing combines steel plate " is obvious, truly feasible, and reinforcing for large-span concrete box girder bridge web cracking provides new way.
The utility model is realized through following technical scheme: vertical external prestressing combines the beam construction of steel plate reinforcement case, comprises the vertical hole of case back base plate in the composition, the web of thickening, presstressed reinforcing steel, the outer steel plate that pastes, concrete block under the anchor.
The technological progress that the utility model is obtained is: vertical external prestressing combines the steel plate reinforcement box-beam structure safe and reliable, easy construction.
Description of drawings
Fig. 1, vertical external prestressing combine steel plate reinforcement box-beam structure profile 1
Fig. 2, vertical external prestressing combine steel plate reinforcement box-beam structure elevation 2
Fig. 3, vertical external prestressing combine steel plate reinforcement box-beam structure plan view 3
The another kind of vertical external prestressing of Fig. 4, this structure combines steel plate reinforcement box-beam structure profile 4
The another kind of vertical external prestressing of Fig. 5, this structure combines steel plate reinforcement box-beam structure elevation 5
Wherein: 1, presstressed reinforcing steel, 2, the vertical hole of top board, 3, anchor block; 4, the web of thickening, 5, the web reserving hole channel of thickening, 6, the vertical hole of plate base plate; 7, the horizontal steel plate of case beam base plate sticking preformed hole, 8, the case beam, 9, former back plate; 10, former web, 11, case back plate pastes the horizontal steel plate of preformed hole.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is explained further details:
To prestressed concrete box-beam bridge, when adopting vertical external prestressing to combine steel plate reinforcement case beam, in the roof and floor place of case beam 8 boring 2 and 6; To there be the base plate steel plate 6 of preformed hole to be pasted on case beam base plate; In the case beam, lay the vertical prestressing section and thickening web 4 is set and reserves prestressed pore passage 5, vertical external prestressing muscle 1 is passed hole 2, reserves steel plate 7 at the bottom of pipeline 5, hole 6 and the plate, build anchor block 3; With external prestressing muscle stretch-draw anchor, and the protection of infusion epoxy resin mortar.
As stated, just can realize the utility model.
The another kind structure of the utility model; Be in the roof and floor place of case beam 8 boring 2 and 6; To there be base plate steel plate 6, carbon cloth and the top board steel plate 11 of preformed hole to be pasted on case back base plate; In the case beam, lay the vertical prestressing section and thickening web 4 is set and reserves prestressed pore passage 5, vertical external prestressing muscle 1 is passed top board steel plate 11, hole 2, reserves steel plate 7 at the bottom of pipeline 5, hole 6, carbon cloth and the plate, build anchor block 3; With external prestressing muscle stretch-draw anchor, and the protection of infusion epoxy resin mortar.
As stated, just can realize the another kind structure of the utility model.

Claims (1)

1. a vertical external prestressing combines the beam construction of steel plate reinforcement case, it is characterized in that: have the base plate steel plate of preformed hole to be pasted on case beam base plate, in the case beam, lay the vertical prestressing section thickening web is set, vertical external prestressing muscle passes steel plate at the bottom of the plate.
CN2011201960537U 2011-06-10 2011-06-10 Vertical external prestress and steel plate combined reinforcing box girder structure Expired - Fee Related CN202247707U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201960537U CN202247707U (en) 2011-06-10 2011-06-10 Vertical external prestress and steel plate combined reinforcing box girder structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201960537U CN202247707U (en) 2011-06-10 2011-06-10 Vertical external prestress and steel plate combined reinforcing box girder structure

Publications (1)

Publication Number Publication Date
CN202247707U true CN202247707U (en) 2012-05-30

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Application Number Title Priority Date Filing Date
CN2011201960537U Expired - Fee Related CN202247707U (en) 2011-06-10 2011-06-10 Vertical external prestress and steel plate combined reinforcing box girder structure

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103046478A (en) * 2013-01-20 2013-04-17 青岛理工大学 Strengthening and pulling device of hinge gap of compositional plate girder bridge
CN103397599A (en) * 2013-08-14 2013-11-20 中铁大桥局股份有限公司 Structure and method for distribution of multi-unit cast-in-situ box girder end steel bundles
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
CN104264594A (en) * 2014-09-10 2015-01-07 北京工业大学 Self-balancing tied arch system for improving bearing force of PSC continuous box girder bridge and reinforcing method by applying self-balancing tie bar arch system
CN105714698A (en) * 2016-04-11 2016-06-29 沈阳建筑大学 Cracking reinforcing structure for main girder bottom plate of wide-width box beam bridge and construction method of cracking reinforcing structure
CN105735153A (en) * 2016-04-12 2016-07-06 沈阳建筑大学 Reinforcement structure for inclined cracks in main girder web plate of box girder bridge and construction method thereof
CN105735152A (en) * 2016-04-11 2016-07-06 沈阳建筑大学 Girder baseplate crack reinforced structure for variable-section box girder bridge and construction method thereof
CN105803926A (en) * 2016-04-07 2016-07-27 沈阳建筑大学 Concrete box-girder bridge girder web plate structure and construction method thereof
CN105887653A (en) * 2016-04-11 2016-08-24 沈阳建筑大学 Wide box girder bridge main beam bottom board structure and construction method thereof
CN106948279A (en) * 2017-04-17 2017-07-14 中铁第五勘察设计院集团有限公司 A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103046478A (en) * 2013-01-20 2013-04-17 青岛理工大学 Strengthening and pulling device of hinge gap of compositional plate girder bridge
CN103046478B (en) * 2013-01-20 2015-04-08 青岛理工大学 Strengthening and pulling device of hinge gap of compositional plate girder bridge
CN103397599A (en) * 2013-08-14 2013-11-20 中铁大桥局股份有限公司 Structure and method for distribution of multi-unit cast-in-situ box girder end steel bundles
CN103397599B (en) * 2013-08-14 2015-06-10 中铁大桥局集团有限公司 Structure and method for distribution of multi-unit cast-in-situ box girder end steel bundles
CN104233963B (en) * 2014-09-10 2016-02-17 北京工业大学 A kind of adjustable prestressed steel truss for reinforcing PSC Continuous Box Girder Bridge and construction method
CN104264594A (en) * 2014-09-10 2015-01-07 北京工业大学 Self-balancing tied arch system for improving bearing force of PSC continuous box girder bridge and reinforcing method by applying self-balancing tie bar arch system
CN104264594B (en) * 2014-09-10 2016-08-24 北京工业大学 A kind of self-balancing tied arch system for improving PSC continuous box girder bridge bearing ability and the method using it to reinforce
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
CN105803926A (en) * 2016-04-07 2016-07-27 沈阳建筑大学 Concrete box-girder bridge girder web plate structure and construction method thereof
CN105735152B (en) * 2016-04-11 2017-04-19 沈阳建筑大学 Girder baseplate crack reinforced structure for variable-section box girder bridge and construction method thereof
CN105735152A (en) * 2016-04-11 2016-07-06 沈阳建筑大学 Girder baseplate crack reinforced structure for variable-section box girder bridge and construction method thereof
CN105887653A (en) * 2016-04-11 2016-08-24 沈阳建筑大学 Wide box girder bridge main beam bottom board structure and construction method thereof
CN105714698A (en) * 2016-04-11 2016-06-29 沈阳建筑大学 Cracking reinforcing structure for main girder bottom plate of wide-width box beam bridge and construction method of cracking reinforcing structure
CN105714698B (en) * 2016-04-11 2017-03-08 沈阳建筑大学 A kind of wide box girder bridge girder Bottom slab breaking ruggedized construction and its construction method
CN105735153A (en) * 2016-04-12 2016-07-06 沈阳建筑大学 Reinforcement structure for inclined cracks in main girder web plate of box girder bridge and construction method thereof
CN106948279A (en) * 2017-04-17 2017-07-14 中铁第五勘察设计院集团有限公司 A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means
CN106948279B (en) * 2017-04-17 2018-08-14 中铁第五勘察设计院集团有限公司 A kind of high-speed railway two-wire prefabricated case beam bale handle reinforcement means

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120530

Termination date: 20140610