CN102953346A - Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap - Google Patents
Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap Download PDFInfo
- Publication number
- CN102953346A CN102953346A CN201210499928XA CN201210499928A CN102953346A CN 102953346 A CN102953346 A CN 102953346A CN 201210499928X A CN201210499928X A CN 201210499928XA CN 201210499928 A CN201210499928 A CN 201210499928A CN 102953346 A CN102953346 A CN 102953346A
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- China
- Prior art keywords
- jack
- cantilever pier
- cantilever
- pier
- root part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 title abstract description 6
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 14
- 239000004567 concrete Substances 0.000 claims abstract description 9
- 238000005336 cracking Methods 0.000 claims description 10
- 238000010008 shearing Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009416 shuttering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a reinforcement device for preventing vertical crack of a root part of a bridge cantilever pier cap, and the reinforcement device comprises a reinforced concrete supporting body and a jack, wherein the jack is arranged on the top surface of the reinforced concrete supporting body and right below a supporting seat of a cantilever pier, and the jack is buried inside the concrete. By adopting the reinforcement device, the hogging moment and the shearing force of the root part of the cantilever pier can be greatly reduced; the jacking force of the jack body is controllable, the load of the cantilever pier can be effectively transferred onto the reinforced concrete supporting body by adjusting the jacking force of the jack and the cantilever pier, so that the logging moment and the shearing force of the root part of the cantilever pier can be effectively reduced, and the safe running of vehicles can be guaranteed; and the jack is not only reserved in the concrete permanently under a corresponding holding force state, but also can reduces the corrosion of the external environment, and the service life of the jack is also prolonged.
Description
Technical field
The present invention relates to the bracing means of bridge cantilever pier, be specifically related to a kind of bracing means of root vertical cracking of bridge cantilever pier cap.
Background technology
Large Span Bridges is sometimes in order to reduce the substructure engineering quantity, alleviate bridge pier weight and adopt the cantilevered bridge pier, bearing is arranged often all near the cantilever end, bracketed part disposes a considerable amount of prestressed strands and plain bars by Design of Cantilever Beam, if but arrangement of reinforcement or physical dimension are not enough, the excessive hogging moment of cantilever pier root can cause near the Vertical Cracks that produces from top to bottom of root, along with the continuity of time, the crack can constantly toward downward-extension and expansion, have a strong impact on the safety of bridge.Reinforcing means commonly used are to set up prestressed cable wire in the first half of the vertical both sides of cantilever pier, add the tensile stress that compressive pre-stress opposing hogging moment produces.But because the restriction of cantilever pier size, the position of newly-increased prestressed cable is limited, and when spanning was little, hogging moment and the shearing of the cantilever pier root that produces were also not too large, relies on newly-increased limited prestressed cable to overcome.If spanning is larger, the cantilever pier root hogging moment that produces and shearing also very large, only depend on newly-increased prestressed cable to apply prestressing force and be difficult to bear excessive internal force, therefore just need to adopt other more effectively means reduce the internal force of cantilever root.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of prior art, a kind of simple in structure, bracing means of bearing the root vertical cracking of the large bridge cantilever pier cap of internal force is provided, reduce hogging moment and the shearing of cantilever root.
The present invention is achieved through the following technical solutions:
A kind of bracing means of root vertical cracking of bridge cantilever pier cap, described bracing means comprises reinforced concrete support body and jack, described jack places under the bearing of reinforced concrete support body end face and cantilever pier cap.Described jack is embedded in the concrete of supporter end face.
The present invention has the following advantages compared with prior art: for the cantilever root vertical cracking that prevents bridge cantilever pier continues to enlarge, the this patent bracing means has adopted reinforced concrete support body and jack, jack places under the bearing of reinforced concrete support body end face and cantilever pier, make first the jack jacking hold lotus to the Vertical Cracks cardinal principle closure of bracketed part, keep the power of holding state and the locking of jack, finally with concrete jack is embedded in the supporter top.Adopt this bracing means, greatly reduced hogging moment and the shearing of cantilever pier root.The top lift of jack itself is controlled, by regulating the top lift of jack and cantilever pier, effectively the load with bracketed part passes to the reinforced concrete support body, thereby has effectively reduced hogging moment and the shearing of cantilever pier cantilever root, has ensured the safe passing of vehicle.
Description of drawings
Fig. 1 is the bracing means structural representation of the root vertical cracking of bridge cantilever pier cap of the present invention.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further concrete detailed description the in detail.
Embodiment
As shown in Figure 1, the bracing means of the root vertical cracking of bridge cantilever pier cap of the present invention, this bracing means comprise reinforced concrete support body 5 and jack 4, and described jack 4 places under the bearing 2 of reinforced concrete support body 5 end faces and cantilever pier cap 3.
Reinforced concrete support body 5 can be according to structure and the field condition of pier shaft 6, be arranged on pier shaft 6 both lateral sides, for can adopting leg-of-mutton type steel skeleton, easy construction reinforced concrete support body 5 does pre-supporting, based on this again assembling reinforcement, shuttering, concreting.
Jack 4 is embedded in the concrete of supporter end face.The jacking tonnage of jack 4 will meet designing requirement, when regulating the jacking stroke of jack, be in conjunction with the cantilever root vertical cracking degree of this bridge cantilever pier in the job site, and crack 1 closed degree is carried out jacking.After the jacking stroke (perhaps jacking dynamics) of jack 4 meets the requirements, the fixing jacking stroke of jack; Around the employing high strength slightly expanded concrete packing jack 4, jack 4 forever is retained in the concrete under the corresponding power of holding state.
Embodiments of the present invention are not restricted to the described embodiments; other are any not to deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. the bracing means of the root vertical cracking of a bridge cantilever pier cap is characterized in that, described bracing means comprises reinforced concrete support body and jack, and described jack places under the bearing of reinforced concrete support body end face and cantilever pier cap.
2. the bracing means of the root vertical cracking of bridge cantilever pier cap according to claim 1 is characterized in that, described jack is embedded in the concrete of supporter end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499928.XA CN102953346B (en) | 2012-11-28 | 2012-11-28 | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499928.XA CN102953346B (en) | 2012-11-28 | 2012-11-28 | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102953346A true CN102953346A (en) | 2013-03-06 |
| CN102953346B CN102953346B (en) | 2015-07-01 |
Family
ID=47762689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210499928.XA Expired - Fee Related CN102953346B (en) | 2012-11-28 | 2012-11-28 | Reinforcement device for preventing vertical crack of root part of bridge cantilever pier cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102953346B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468743A (en) * | 2019-07-31 | 2019-11-19 | 中铁大桥局集团有限公司 | A kind of traveling cradle and construction method for the transformation of old pier coping |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100840191B1 (en) * | 2007-12-24 | 2008-06-23 | 노윤근 | The bridge section expansion method of construction for which steel synthetic concrete steel pipe and this were used |
-
2012
- 2012-11-28 CN CN201210499928.XA patent/CN102953346B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100840191B1 (en) * | 2007-12-24 | 2008-06-23 | 노윤근 | The bridge section expansion method of construction for which steel synthetic concrete steel pipe and this were used |
Non-Patent Citations (2)
| Title |
|---|
| 单成林: "大跨悬臂空心桥墩病害成因分析及加固对策", 《中外公路》 * |
| 杨炜: "大悬臂空心墩悬臂端结构裂缝病害的加固处理", 《企业科技与发展》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468743A (en) * | 2019-07-31 | 2019-11-19 | 中铁大桥局集团有限公司 | A kind of traveling cradle and construction method for the transformation of old pier coping |
| CN110468743B (en) * | 2019-07-31 | 2020-12-01 | 中铁大桥局集团有限公司 | Movable hanging bracket for transformation of old bridge pier cap and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102953346B (en) | 2015-07-01 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220817 Address after: 510665 Room 504, No. 6, Fifth Lane, Suinan New Village, Tangxia, Tianhe District, Guangzhou City, Guangdong Province, China Patentee after: Guangdong Golden Shield Reinforcement Engineering Co., Ltd. Address before: 510640 No. five, 381 mountain road, Guangzhou, Guangdong, Tianhe District Patentee before: SOUTH CHINA University OF TECHNOLOGY |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 |