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 PDFInfo
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- 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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- vertical external
- box girder
- prestressed
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 230000003014 reinforcing effect Effects 0.000 title description 9
- 210000002435 tendon Anatomy 0.000 claims abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 17
- 239000004567 concrete Substances 0.000 abstract description 11
- 239000003822 epoxy resin Substances 0.000 abstract description 3
- 239000004570 mortar (masonry) Substances 0.000 abstract description 3
- 229920000647 polyepoxide Polymers 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000008719 thickening Effects 0.000 description 7
- 239000004744 fabric Substances 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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Abstract
本实用新型公开了一种竖向体外预应力结合钢板加固箱梁时，采用竖向体外预应力加固时，在箱梁8的顶底板处钻孔2及6，将有预留孔的底板钢板6粘贴于箱梁底板，在箱梁内布设竖向预应力截面处设置加厚腹板4并预留预应力孔道5，将竖向体外预应力筋1穿过孔2、预留管道5、孔6和板底钢板7，浇筑锚块3，将体外预应力筋张拉锚固，并灌注环氧树脂砂浆防护。本技术能提高构件的安全稳定性的优点，适用于加固混凝土箱梁。
The utility model discloses a combination of vertical external prestressing combined with steel plates to strengthen box girders. When using vertical external prestressing for reinforcement, holes 2 and 6 are drilled at the top and bottom plates of box girders 8, and the bottom plate steel plates with reserved holes are drilled. 6 Paste on the bottom plate of the box girder, set a thickened web 4 at the vertical prestressed section in the box girder and reserve a prestressed channel 5, pass the vertical external prestressed tendon 1 through the hole 2, reserve the pipe 5, Hole 6 and plate bottom steel plate 7, anchor block 3 is poured, the external prestressed tendons are stretched and anchored, and epoxy resin mortar is poured for protection. The technology can improve the safety and stability of components, and is suitable for strengthening concrete box girders.
Description
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)
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 |
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| Publication Number | Publication Date |
|---|---|
| CN202247707U true CN202247707U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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| CN (1) | CN202247707U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046478A (en) * | 2013-01-20 | 2013-04-17 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN111395209A (en) * | 2020-04-03 | 2020-07-10 | 中铁大桥科学研究院有限公司 | Reinforcing device and reinforcing method for concrete beam web |
| CN113605212A (en) * | 2021-07-29 | 2021-11-05 | 广东省交通规划设计研究院集团股份有限公司 | Anti-cracking structure for single-box double-chamber prefabricated segment box girder in construction period and construction method thereof |
| CN114438910A (en) * | 2022-01-26 | 2022-05-06 | 四川路航建设工程有限责任公司 | Post-buried steel plate reinforcing prestress structure and construction method |
-
2011
- 2011-06-10 CN CN2011201960537U patent/CN202247707U/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046478A (en) * | 2013-01-20 | 2013-04-17 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| CN103046478B (en) * | 2013-01-20 | 2015-04-08 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| 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 |
| 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 |
| CN104233963B (en) * | 2014-09-10 | 2016-02-17 | 北京工业大学 | An adjustable prestressed steel truss and construction method for strengthening PSC continuous box girder bridge |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN107938525B (en) * | 2017-12-20 | 2023-06-30 | 山西省交通规划勘察设计院有限公司 | Reinforcement structure and method of an assembled continuous box girder |
| CN111395209A (en) * | 2020-04-03 | 2020-07-10 | 中铁大桥科学研究院有限公司 | Reinforcing device and reinforcing method for concrete beam web |
| CN113605212A (en) * | 2021-07-29 | 2021-11-05 | 广东省交通规划设计研究院集团股份有限公司 | Anti-cracking structure for single-box double-chamber prefabricated segment box girder in construction period and construction method thereof |
| CN114438910A (en) * | 2022-01-26 | 2022-05-06 | 四川路航建设工程有限责任公司 | Post-buried steel plate reinforcing prestress structure and construction method |
| CN114438910B (en) * | 2022-01-26 | 2024-07-30 | 四川路航建设工程有限责任公司 | Post-buried steel plate reinforced prestress structure and construction method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140610 |