CN106835966B - A kind of construction method of partial prestressing bridge expanssion joint changeover portion - Google Patents
A kind of construction method of partial prestressing bridge expanssion joint changeover portion Download PDFInfo
- Publication number
- CN106835966B CN106835966B CN201510887541.5A CN201510887541A CN106835966B CN 106835966 B CN106835966 B CN 106835966B CN 201510887541 A CN201510887541 A CN 201510887541A CN 106835966 B CN106835966 B CN 106835966B
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- CN
- China
- Prior art keywords
- bar
- expansion joint
- changeover portion
- finish rolling
- rolling deformed
- 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.)
- Expired - Fee Related
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/067—Flat continuous joints cast in situ
Abstract
The present invention discloses a kind of construction method of partial prestressing bridge expanssion joint changeover portion.The technical characterstic of this method is：Using finish rolling deformed bar with nut is mating can be in localized tendon prestressing force characteristic, cooperation embedded bar net in blacktop is used as anchoring stress point, expansion joint side bar, expansion joint changeover portion and bituminous paving can be made to be connected under the action of prestressing force integral, cooperative bearing, improve the bearing capacity in expansion joint section, reduce the influence of unstable factor and subgrade settlement to expansion joint performance of constructing, the larger service life for extending expansion joint section.
Description
Technical field
The present invention relates to a kind of construction methods of bridge expanssion joint changeover portion, especially can improve bridge and Abutment is stretched
Contracting seam and its total bearing capacity on attached road surface, the construction method for extending the expansion joint service life.
Background technology
Currently, the common construction method of well known bridge expanssion joint is：One, one section of transition is reserved when constructing bituminous paving
Section and stirrup prepare installation expansion joint after road surface reaches design strength；Two, road surface linking segment interface is trimmed, transition is cleared up
Section residue；Three, it places expansion joint in place and welds corresponding connection reinforcing bar；Four, it pours transition section concrete and smoothes out.Expansion joint
And its transition section structure is complicated, is made of unlike materials such as steel, concrete and pitches, even identical concrete there is also
Age is different, and load is heavy, and stress is extremely uneven, is one of the component of bridge most destructible.Traditional construction method only exists
A small amount of regular reinforcement is arranged in transition, is affected by construction factor by expansion joint performance, is especially connected in unlike material
Section is susceptible to crack, and the expansion joint of work with cracking accelerates breakdown speed under the action of reciprocal heavy duty, ultimately causes and stretch
Contracting seam jumps vehicle and even fails.
Invention content
In order to solve, the unlike materials connection integrity such as steel, concrete, pitch is poor, expansion joint of conventional construction method
And its problem of changeover portion reliability deficiency, the present invention provide a kind of construction being applied with prestressed expansion joint and its changeover portion
Method, the construction method can improve the globality and bearing capacity of expansion joint side bar, changeover portion and bituminous paving changeover portion,
Concrete is reduced in automobile respectively to load, changeover portion subgrade settlement, the cracking constructed under the factors such as unstable, improves expansion joint
Integrated carrying ability.
The technical solution adopted by the present invention to solve the technical problems includes the following steps：Step S100, in transition section
Set pre-buried stirrup in the bridge floor plate or abutment at place；Step S200, construct bituminous paving when, close to expansion joint changeover portion
Pre-buried ripple type bar-mat reinforcement in blacktop, and vertical bridge is reserved to welding point；Step S300 cuts flat with bituminous paving end face,
And use dabbing machine dabbing；Step S400, the residue and dust in cleaning changeover portion region；Step S500, in changeover portion stirrup ring
Interior setting, binding transverse steel, longitudinal finish rolling deformed bar are set to below transverse steel, divide on set on finish rolling deformed bar
From pipe so that it is detached with concrete, finish rolling deformed bar one end reserves welding point with bituminous paving bar-mat reinforcement and is welded on one
It rises；Step S600, installation and positioning expansion joint, and finish rolling deformed bar is made to pass through expansion joint side bar preformed hole, cover top nut；Step
Rapid S700, casting concrete use vibrating spear air-free concrete, and smooth out concrete surface while pouring；Step S800, is waited for
After concrete reaches design strength, bolt-nut is tightened using torque spanner, finish rolling deformed bar is allowed to have certain prestressing force pressure
Power deposit；Step S900, sprays antirust paint on nut.
The invention has the advantages that expansion joint, changeover portion and neighbouring pitch section cooperative bearing can be made, weight is reduced
Destruction of the automobile to expansion joint is carried, reduces the influence of unstable factor and subgrade settlement to expansion joint performance of constructing, larger carries
The high service life in expansion joint section, reinforcing mesh structure and construction process are simple.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is that one embodiment object using the present invention indulges elevation.
1. expansion joint side bar in figure, 2. finish rolling deformed bars, 3. separating pipes, 4. changeover portion transverse steels, 5. bituminous pavings
Layer, 6. changeover portions, 7. bolt-nuts, 8. water proof rubber bars, 9. stirrups, 10. blacktop longitudinal reinforcements, 11. oblique reinforcing bars,
12. blacktop transverse steel, 13. welding points, 14. beam bodies, 15. beam body transverse steels.
Specific implementation mode
In order to solve the problems, such as expansion joint changeover portion premature failure, jump vehicle, a kind of bridge expanssion joint mistake provided by the invention
Cross the construction method of section.Fig. 1 is that one embodiment object using the present invention indulges elevation.This method includes walking in detail below
Suddenly：
Step S100, the pre-buried stirrup (9) in the bridge beam body (14) at changeover portion (6) position.
Step S200, construct blacktop when, the pre-buried ripple in the blacktop (5) close to expansion joint changeover portion
Steel bar net, ripple type bar-mat reinforcement blacktop longitudinal reinforcement (10) and blacktop transverse steel (12) and oblique steel
Muscle (11) is welded to form, and whens pre-buried supercrust longitudinal reinforcement (10), which should reserve, is not shorter than the vertical bridge of 5cm to welding point.
Step S300 cuts flat with bituminous paving end face, and uses dabbing machine dabbing.Quality should to be chiseled out as possible soft when dabbing
Bituminous concrete.
Step S400 clears up the residue and dust in changeover portion (6) region.Preferably, larger particles can cleared up
It after residue, is rinsed using high pressure clear water, reduces the impurity such as dust as possible and defect is caused to bonding interface.
Step S500, the setting changeover portion transverse steel (4) in changeover portion stirrup (9) ring, and bound stirrup (9)
On, finish rolling deformed bar (2) is set to below changeover portion transverse steel (4), and stirrup (9) plays constraint changeover portion transverse steel
(4) and the effect of finish rolling deformed bar (2).Separating pipe (3) is put on finish rolling deformed bar (2) so that itself and concrete point
From preferably, the corrosion of finish rolling deformed bar (2), should spray antirust paint on finish rolling deformed bar in order to prevent.Fining twisted steel
Muscle (2) one end is reserved welding point with blacktop longitudinal reinforcement (10) and is welded together, and welding segment length is not less than 4cm.
Step S600, installation and positioning expansion joint, and finish rolling deformed bar (2) is made to pass through expansion joint side bar (1) preformed hole,
Put on bolt-nut (7).Expansion joint upper limb absolute altitude should be consistent with grade elevation, and control errors are within 2mm, finish rolling deformed bar
(2) it answers the straight preformed hole that passes through, precession bolt-nut (7) to be contacted with side bar (1) up to it, cuts down extra finish rolling deformed bar
(2)。
Step S700, casting concrete use vibrating spear air-free concrete, and smooth out concrete surface while pouring.
Concrete should use slightly expanded concrete, label to be not less than C50, should reinforce vibrating for interface when vibrating.
Step S800 tightens bolt-nut (7) using torque spanner, makes finish rolling spiral shell after concrete reaches design strength
Line reinforcing bar has certain prestressed pressure deposit.Concrete should conserve under the curing condition of standard to be not less than 7 days, and anchoring is tightened
After nut (7), the prestressing force of finish rolling deformed bar (2) should be not less than 1000MPa.
Step S900 sprays antirust paint in bolt-nut (7).Antirust paint should be selected containing yellow zinc chromate primer paint, and smear one layer
Epoxy waterproof paint finally loads onto water proof rubber bar (8).
Claims (2)
1. a kind of construction method of partial prestressing bridge expanssion joint changeover portion, characterized in that this method includes following necessary step
Suddenly：
Step S100, construct bituminous paving when, the embedded bar net in the blacktop close to expansion joint changeover portion, and reserving
Bridge is indulged to connector；
Longitudinal finish rolling deformed bar is arranged in changeover portion, by finish rolling deformed bar one end and bituminous paving bar-mat reinforcement in step S200
Reserved connector is connected together；
Step S300, installation and positioning expansion joint, and finish rolling deformed bar is made to pass through expansion joint side bar preformed hole, top nut is covered,
Antirust paint is sprayed on finish rolling deformed bar and nut, antirust paint includes the epoxy waterproof paint for containing yellow zinc chromate primer paint, and being applied to outer,
Water proof rubber bar is finally installed；
Step S400 tightens the nut on finish rolling deformed bar, finish rolling deformed bar is allowed to have after concrete reaches design strength
Certain prestressing force deposit.
2. according to the method described in claim 1, it is characterized in that：Embedded bar net is by longitudinally, laterally and slanting reinforcement welding
It forms, bar-mat reinforcement indulges bridge and is more than 1m to length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510887541.5A CN106835966B (en) | 2015-12-07 | 2015-12-07 | A kind of construction method of partial prestressing bridge expanssion joint changeover portion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510887541.5A CN106835966B (en) | 2015-12-07 | 2015-12-07 | A kind of construction method of partial prestressing bridge expanssion joint changeover portion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106835966A CN106835966A (en) | 2017-06-13 |
| CN106835966B true CN106835966B (en) | 2018-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510887541.5A Expired - Fee Related CN106835966B (en) | 2015-12-07 | 2015-12-07 | A kind of construction method of partial prestressing bridge expanssion joint changeover portion |
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| Country | Link |
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| CN (1) | CN106835966B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024301B (en) * | 2018-09-05 | 2024-01-26 | 贵州顺康检测股份有限公司 | Expansion joint stretching equipment |
| CN111455766B (en) * | 2020-04-14 | 2022-04-12 | 重庆义伦公路建设有限公司 | Regenerated asphalt concrete structure for road and construction process thereof |
| CN111733695B (en) * | 2020-07-23 | 2021-11-16 | 中铁大桥勘测设计院集团有限公司 | Expansion joint reinforcement structure for bridge, bridge expansion joint structure and construction method |
Citations (8)
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|---|---|---|---|---|
| CN2319438Y (en) * | 1997-12-29 | 1999-05-19 | 廖祖泉 | Durable, waterproof, dustproof and anti-shock extension appts. for highway bridge |
| CN2543985Y (en) * | 2002-05-21 | 2003-04-09 | 上海紫江橡胶制品有限公司 | Corrosion-resistant bridge expansion joint |
| CN1560370A (en) * | 2004-03-06 | 2005-01-05 | 常熟橡胶厂 | Anchorage mechanism for apparatus of bridge expansion joint |
| CN201062341Y (en) * | 2007-06-18 | 2008-05-21 | 张楸长 | Universal bridge telescoping device |
| CN202273175U (en) * | 2011-07-14 | 2012-06-13 | 安徽省交通规划设计研究院 | Deep-buried comb plate type highway bridge expansion device |
| CN202830755U (en) * | 2012-09-13 | 2013-03-27 | 江苏淮安交通勘察设计研究院有限公司 | Prestress anchoring type bridge retractable device convenient to maintain |
| CN204023401U (en) * | 2014-08-28 | 2014-12-17 | 西安公路研究院 | A kind of bidirectional modulation formula bridge expansion joint installation |
| KR20150102444A (en) * | 2014-02-28 | 2015-09-07 | 이두성 | Rail-type expansion joints for bridges and their construction methods |
-
2015
- 2015-12-07 CN CN201510887541.5A patent/CN106835966B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2319438Y (en) * | 1997-12-29 | 1999-05-19 | 廖祖泉 | Durable, waterproof, dustproof and anti-shock extension appts. for highway bridge |
| CN2543985Y (en) * | 2002-05-21 | 2003-04-09 | 上海紫江橡胶制品有限公司 | Corrosion-resistant bridge expansion joint |
| CN1560370A (en) * | 2004-03-06 | 2005-01-05 | 常熟橡胶厂 | Anchorage mechanism for apparatus of bridge expansion joint |
| CN201062341Y (en) * | 2007-06-18 | 2008-05-21 | 张楸长 | Universal bridge telescoping device |
| CN202273175U (en) * | 2011-07-14 | 2012-06-13 | 安徽省交通规划设计研究院 | Deep-buried comb plate type highway bridge expansion device |
| CN202830755U (en) * | 2012-09-13 | 2013-03-27 | 江苏淮安交通勘察设计研究院有限公司 | Prestress anchoring type bridge retractable device convenient to maintain |
| KR20150102444A (en) * | 2014-02-28 | 2015-09-07 | 이두성 | Rail-type expansion joints for bridges and their construction methods |
| CN204023401U (en) * | 2014-08-28 | 2014-12-17 | 西安公路研究院 | A kind of bidirectional modulation formula bridge expansion joint installation |
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| Publication number | Publication date |
|---|---|
| CN106835966A (en) | 2017-06-13 |
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Granted publication date: 20180831 Termination date: 20191207 |