CN102979042A - Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device - Google Patents
Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device Download PDFInfo
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- CN102979042A CN102979042A CN2012105070251A CN201210507025A CN102979042A CN 102979042 A CN102979042 A CN 102979042A CN 2012105070251 A CN2012105070251 A CN 2012105070251A CN 201210507025 A CN201210507025 A CN 201210507025A CN 102979042 A CN102979042 A CN 102979042A
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Abstract
The invention discloses a bridge pier connecting device for a bridge lifting process and a construction method for the bridge pier connecting device, and relates to a connecting technology for bridge piers in bridge reconstruction processes. According to the connecting technology, self-compacting micro-expansive reinforced concrete pier columns and encasing steel plates are involved; the sizes and the numbers of internal vertical reinforcements are the same as those of vertical reinforcements in the conventional pier column structures; sealed stirrups are adopted, and are densely arranged within entire section ranges along connecting sections of the bridge piers; when more than four main vertical reinforcements are arranged on each side in the rectangular pier columns, combined stirrups are arranged; studs are welded on the surfaces of the encasing steel plates to improve the combined mechanical performance of the steel plates and concrete; and the encasing steel plates have a function of restricting core concrete, and can also serve as external dies for the concrete pouring of the connecting sections, and grout holes and weeping holes are reserved in the external dies. According to the connecting technology, requirements on the strength, the rigidity and the stability of the lifted bridge piers which are lifted can be met.
Description
Technical field
The present invention relates to a kind of bridge pier link technique, belong to civil engineering Bridge Rebuilding Project field.
Background technology
Along with the fast development of China's communications and transportation cause, the operation ability of the vehicles also improves day by day, and it run highly also corresponding increase, this so that at present the clear height of quite a few cross-line bridge and waterway bridge can't satisfy the demand that circuit is normally runed under the bridge.Therefore, be the operation function of circuit under the safety of guaranteeing the cross-line bridge and the bridge, must improve clear height under the bridge of this Partial Bridges, integral bridge synchronization of jacking up technology is exactly the novel construction technology of arising at the historic moment under this background.Integral bridge synchronization of jacking up technological merit: few to interference on every side during construction; Do not need to take over the land for use and remove or take a large amount of construction plants; Can shorten construction period; Avoid overlapping investment, have good society and economic benefits.
Can not satisfy for under-clearance that circuit operation demand is under navigation or the bridge, general way is to remove original bridge, again builds the new bridge that meets the demands of seat, perhaps bridge is carried out synchronization of jacking up.Compare with jacking but remove the scheme of rebuilding, obvious waste is arranged.For example: the southern woods bridge jacking cost in Huzhou is invested 6,400,000 yuan of 9,970,000 (detail estimates) acceptance of the bid engineering costs (contract price that comprises 10% tentative gold), wiring engineering, monitoring and other expense are 3,570,000 yuan, estimate to save investment about 3,500 ten thousand, 20 months reductions of erection time.
But in the middle of the existing integral bridge synchronization of jacking up technology, the linkage section of new post and original cylinder tends to go wrong after the bridge jacking, causes whole construction speed slack-off.
Summary of the invention
The objective of the invention is to design bridge pier linkage and job practices thereof in the bridge jacking process, solve after bridge jacking the problem of the connection of new post and the cylinder of being connected, for achieving the above object, take following technical scheme:
Bridge pier linkage in the bridge jacking process comprises encased steel plate, peg, and described encased steel plate comprises at least two blocks of split type steel plates, has bleeding hole and grout hole on the described encased steel plate, is fixed with uniformly some pegs in the inboard of described encased steel plate.
The job practices of the bridge pier linkage in the described bridge jacking process: comprise following step,
Cut column concrete between the thick pillar beam after the first step, the bridge jacking, dock with identical vertical reinforcement;
Second step, configuration stirrup, and encryption;
The 3rd step, at described encased steel plate fixedly after the peg, the upper and lower side that is fixed with the encased steel plate of peg is connected with thick pillar beam up and down;
The 4th step, concreting.
Described concrete adopts self-compacting concrete, is added with expansion agent simultaneously in concrete.
The quantity such as vertical reinforcement same specification that described vertical reinforcement and former pier stud adopt, overlapping mode adopts the compression sleeve mechanical connection.
Stirrup adopts closed stirrup, is encrypting in full segment limit along the linkage section of bridge pier, when the vertical main muscle quantity in inner each limit of pier stud during more than four, compound stirrup is set.
Apparatus of the present invention and job practices have the following advantages:
One, this connected mode goes for the connection of different size rectangular column.
Two, directly adopt encased steel plate as outboard template, saved mould material, simplified construction sequence.
Three, the inboard weld stud of encased steel plate has guaranteed contacting with inside is concrete of encased steel plate, has increased the constraint of encased steel plate to inner concrete bodies, increases the mechanical property of cylinder.
Four, inner concrete adopts the self-compaction slightly expanded concrete, has guaranteed density and the reliability of cylinder.
Description of drawings
Fig. 1 is that the present invention increases part bridge pier skiagraph;
Fig. 2 is the A-A sectional view of Fig. 1;
Wherein 1, encased steel plate; 2, peg; 3, stirrup; 4, compound stirrup; 5, vertical main muscle; 6, self-compaction slightly expanded concrete; 7, grout hole; 8, bleeding hole; 9, bridge floor; 10, shrinkage joint; 11, bent cap; 12, former bridge pier; 13, pier stud is increased part.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the technology that reinforces the connection of the present invention, it is comprised of encased steel plate 1, peg 2, stirrup 3, vertical applied force reinforcing bar 5 and self-compaction slightly expanded concrete 6.Encased steel plate 1 is outer wrapping on the former pier stud directly, its upper and lower end parts directly is close to up and down thick pillar beam, on the encased steel plate 1 of uniformly welding of peg 2, the size of peg 2 and spacing must satisfy cobble-stone diameter requirement in the concrete, vertical applied force reinforcing bar 5 sizes, size and position are identical with vertical applied force reinforcing bar in the former pier stud, overlapping mode adopts the compression sleeve mechanical connection, stirrup 3 must do the encryption process in increasing segment limit, when the vertical main muscle in inner each limit of rectangular pier columns during more than 4, compound stirrup 4 is set.Concreting 6 after template and inner reinforcing bar place, for guaranteeing density and the durability of structure, concrete adopts existing high flow degree, do not emanate again, has uniformity, stability, build and rely on deadweight to flow, need not to vibrate and reach closely knit self-compacting concrete, in concrete, add simultaneously a small amount of expansion agent and prevent that the shrinkage and creep in the concrete hydrating process from making structure generation space and crack.
Job step of the present invention: cut column concrete between the thick pillar beam after the first step, the bridge jacking, dock with identical vertical reinforcement; Second step, configuration stirrup, and encryption; The 3rd step, on described encased steel plate after the weld stud, be fixed with peg encased steel plate upper and lower side directly and be connected the connection of thick pillar beam; The 4th step, concreting.
Above-mentioned connected mode need not form removal, treats that inner self-compaction slightly expanded concrete reaches after the some strength dismountable supporting and protection structure.
Claims (5)
1. the bridge pier linkage in the bridge jacking process, it is characterized in that: comprise encased steel plate, peg, described encased steel plate comprises at least two blocks of split type steel plates, has bleeding hole and grout hole on the described encased steel plate, is fixed with uniformly some pegs in the inboard of described encased steel plate.
2. the job practices of the bridge pier linkage in the bridge jacking process according to claim 1: it is characterized in that: comprise following step:
Cut column concrete between the thick pillar beam after the first step, the bridge jacking, dock with identical vertical reinforcement;
Second step, configuration stirrup, and encryption;
The 3rd step, at described encased steel plate fixedly after the peg, the upper and lower side that is fixed with the encased steel plate of peg is connected with thick pillar beam up and down;
The 4th step, concreting.
3. the job practices of the bridge pier linkage in the bridge jacking process according to claim 2 is characterized in that: described concrete adopts self-compacting concrete, is added with expansion agent in concrete.
4. the job practices of the bridge pier linkage in the bridge jacking process according to claim 2 is characterized in that: the quantity such as vertical reinforcement same specification that described vertical reinforcement and former pier stud adopt, overlapping mode employing compression sleeve mechanical connection.
5. the job practices of the bridge pier linkage in the bridge jacking process according to claim 2, it is characterized in that: stirrup adopts closed stirrup, encrypting in full segment limit along the linkage section of bridge pier, when the vertical main muscle quantity in inner each limit of pier stud during more than four, compound stirrup is being set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210507025.1A CN102979042B (en) | 2012-12-03 | 2012-12-03 | Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210507025.1A CN102979042B (en) | 2012-12-03 | 2012-12-03 | Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device |
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| CN102979042A true CN102979042A (en) | 2013-03-20 |
| CN102979042B CN102979042B (en) | 2015-07-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510458A (en) * | 2013-09-24 | 2014-01-15 | 四川省交通运输厅公路规划勘察设计研究院 | Pile type continuous rigid frame bridge and construction method thereof |
| CN104594208A (en) * | 2014-12-18 | 2015-05-06 | 西南科技大学 | Seismic hardening device for bending-shear-torsion RC component |
| CN108342937A (en) * | 2018-03-14 | 2018-07-31 | 安徽省交通控股集团有限公司 | A kind of prefabricated pier, the floated tubular Crossing brace connection structure of plate |
| CN110502819A (en) * | 2019-08-14 | 2019-11-26 | 上海市城市建设设计研究总院（集团）有限公司 | The computer-implemented method of concrete-bridge strip member outer closure stirrup |
| CN113981810A (en) * | 2021-11-01 | 2022-01-28 | 华汇工程设计集团股份有限公司 | Prefabricated bridge pier for jacking slope-adjusting bridge and construction method of prefabricated bridge pier |
| CN114250723A (en) * | 2022-01-05 | 2022-03-29 | 黄河勘测规划设计研究院有限公司 | Jacking reconstruction method of existing continuous rigid frame bridge |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510458A (en) * | 2013-09-24 | 2014-01-15 | 四川省交通运输厅公路规划勘察设计研究院 | Pile type continuous rigid frame bridge and construction method thereof |
| CN103510458B (en) * | 2013-09-24 | 2015-05-27 | 四川省交通运输厅公路规划勘察设计研究院 | Pile type continuous rigid frame bridge and construction method thereof |
| CN104594208A (en) * | 2014-12-18 | 2015-05-06 | 西南科技大学 | Seismic hardening device for bending-shear-torsion RC component |
| CN108342937A (en) * | 2018-03-14 | 2018-07-31 | 安徽省交通控股集团有限公司 | A kind of prefabricated pier, the floated tubular Crossing brace connection structure of plate |
| CN108342937B (en) * | 2018-03-14 | 2024-03-01 | 安徽省交通控股集团有限公司 | Prefabricated pier and plate suspension type cylindrical shear support connection structure |
| CN110502819A (en) * | 2019-08-14 | 2019-11-26 | 上海市城市建设设计研究总院（集团）有限公司 | The computer-implemented method of concrete-bridge strip member outer closure stirrup |
| CN113981810A (en) * | 2021-11-01 | 2022-01-28 | 华汇工程设计集团股份有限公司 | Prefabricated bridge pier for jacking slope-adjusting bridge and construction method of prefabricated bridge pier |
| CN113981810B (en) * | 2021-11-01 | 2024-01-26 | 华汇工程设计集团股份有限公司 | Prefabricated assembled bridge pier for jacking slope-adjusting bridge and construction method thereof |
| CN114250723A (en) * | 2022-01-05 | 2022-03-29 | 黄河勘测规划设计研究院有限公司 | Jacking reconstruction method of existing continuous rigid frame bridge |
| CN114250723B (en) * | 2022-01-05 | 2023-11-17 | 黄河勘测规划设计研究院有限公司 | Jacking reconstruction method for existing continuous rigid frame bridge |
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| CN102979042B (en) | 2015-07-01 |
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