CN102021889A - Bridge erection method - Google Patents
Bridge erection method Download PDFInfo
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- CN102021889A CN102021889A CN 201010591496 CN201010591496A CN102021889A CN 102021889 A CN102021889 A CN 102021889A CN 201010591496 CN201010591496 CN 201010591496 CN 201010591496 A CN201010591496 A CN 201010591496A CN 102021889 A CN102021889 A CN 102021889A
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Abstract
The invention discloses a bridge erection method, which is a prefabricated pier-top beam method. The bridge erection method comprises the following steps of: casting at least two pier columns at intervals; prefabricating pier-top beams, and arranging transverse prestressing tendons in the prefabricated pier-top beams; after the setting of concrete, tensioning the transverse prestressing tendons; arranging supports at the tops of piers, hoisting the pier-top beams, arranging the pier-top beams at the tops of the piers, and temporarily fixedly connecting the pier-top beams and the pier columns by using steel plates and reinforcing steel bars; erecting prefabricated longitudinal deck beams on the pier-top beams; casting in-situ concrete joint surfaces on the end faces of the longitudinal deck beams and the lateral surfaces of the pier-top beams, and casting in-situ early-strength and high-strength concrete in the joint surfaces; after the setting of the concrete in the joint surfaces, tensioning longitudinal prestressing tendons of the longitudinal beams; and removing the steel plates and the reinforcing steel bars. The method greatly reduces the height of a structural building and reduces the deck elevation; and a freely supported structure is changed into a continuous structure by the cast-in-situ concrete so as to improve the integrity of a bridge, prolong the service life of the bridge, solve the problem of stress in construction stages and reduce the cost of engineering construction.
Description
Technical field
The present invention relates to a kind of bridge erection method, relate in particular to continuous bridge erection method behind a kind of first freely-supported.
Background technology
At present, when setting up the grade separation bridge in the city, generally adopt two kinds of methods, a kind of is continuous structure behind the first freely-supported, and another kind is freely supported structure-bridge floor continuous structure.Adopt continuous structure behind the first freely-supported, it is compared with freely supported structure-bridge floor continuous structure, is not easy to damaged bridge floor and constructs continuously, therefore has good endurance, and road-ability is good, the numerous advantages little to peripheral noise effect.
Two kinds of following ways are arranged behind elder generation's freely-supported continuously:
1. set up on the bent cap behind the first simply supported beam continuously.This defects of construction: the bridge pier bent cap exposes, and not only influence under-clearance, and it is attractive in appearance to influence bridge.Bent cap still must adopt sets up support cast-in-place construction on support.Many fulcrums continuous beam is stressed indeterminate.This mode must design the bigger bent cap of the scale of construction, and this will make that the height of bent cap is very high, the bridge floor absolute altitude is greatly improved after satisfying the under-clearance requirement, and the bridge bent cap is clumsy, and sense of depression is strong, and landscape effect is poor.
2. first freely-supported on the falsework reproduces and waters crossbeam and makes structure continuous.This defects of construction: to the stability requirement height of construction period support, falsework is built and demolition expense expenses of labour material.Difficult when continuous beam falls frame simultaneously, safety is relatively poor relatively.
Therefore, those skilled in the art are devoted to develop a kind of job practices always, reduce the structural construction height, reduce the bridge floor absolute altitude, reduce construction costs, improve integral bridge, and in the life-span, the solution construction stage is stressed, and it is convenient to construct, bridge erection method fast and safely.
Summary of the invention
In view of this, the invention provides a kind of bridge erection method, reduce the structural construction height greatly, reduce the bridge floor absolute altitude, reduce construction costs, improve integral bridge, in the life-span, the solution construction stage is stressed, and it is convenient to construct, fast and safely.
Its method comprises the steps:
A) at least two pier columns that are provided with at interval of cast;
B) prefabricated pier head piece is arranged the transverse prestress bundle in described pier head piece;
C) after described pier head piece concrete is consolidated firmly, stretch-draw transverse prestress bundle;
D) the described pier head piece of lifting behind the erection support of pier top is installed in Dun Ding, with described pier column steel plate and reinforcing bar temporary consolidation;
E) erecting bridge floor longeron on described pier head piece;
F) described bridge floor longeron end face and described pier head piece side cast-in-situ concrete bonding surface, in described bonding surface cast-in-place morning strong, high-strength concrete;
G) after described bonding surface inner concrete is consolidated firmly, the longitudinal prestressing strands of the described longeron of stretch-draw;
H) remove described steel plate and described reinforcing bar, system is converted to continuous beam.
Further, described pier head piece is the segmentation manufacturing, lifting, assembly unit.Described assembly unit comes assembly unit by stretch-draw transverse prestress bundle.In step c), described transverse prestress bundle is stretch-draw in batches.Described bridge is tiltedly to draw support to strengthen, and described pier head piece uses steel stiff skeleton crossbeam.In step d), described steel plate uses welding or bolt to be connected with described reinforcing bar.
Further, the combining structure that described stiff skeleton crossbeam uses steel and concrete to form, described combining structure is that concrete waters a layer concrete again above having added the described bonding surface of longeron, or spreads concrete on the steel work of described stiff skeleton crossbeam, pours into a mould described bonding surface again.
The present invention brings following beneficial effect:
1. reduce the structural construction height, reduce the bridge floor absolute altitude, reduce construction costs.
2. the pier head piece becomes the part of girder, and globality is stronger.
3. column and pier head piece are hinged, adopt seat structure stressed clear and definite, and the bearing life-span is long.
The interim affixed solution construction stage of pier head piece stressed, it is convenient to construct, fast and safely.
5. structure improves integral bridge continuously, and road-ability is good, and noise effect is little, good endurance.
Description of drawings
Fig. 1 is the flow chart of a kind of bridge erection method of the present invention.
Fig. 2 is the longitudinal sectional view of prefabricated pier head piece of the present invention.
Fig. 3 is the vertical view of prefabricated pier head piece of the present invention.
Fig. 4 is the transverse views of prefabricated pier head piece of the present invention.
Fig. 5 is that prefabricated pier head piece of the present invention adds the transverse views of tiltedly drawing support.
The specific embodiment
As Fig. 1, be the flow chart of a kind of bridge erection method provided by the invention.As Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, this bridge erection method may further comprise the steps:
Prefabricated pier head piece 15 sections are inverted T-shaped 151, deck-molding is a little less than longitudinal prestressing strands, the bottom surface inverted T-shaped is chosen the wing 123 can support bridge floor longeron 122, bridge floor longeron 122 end faces and the pier of falling T head piece 151 sides are cast-in-situ concrete bonding surface 125, shear connector is made up of a plurality of rectangles or strip key piece (groove) on the bonding surface 125, arranges transverse prestress bundle 121 by designing requirement in the pier of the falling T head piece.
After prefabricated pier head piece 15 concrete reach design strength, stretch-draw transverse prestress bundle 121 (can by designing requirement stretch-draw in batches).
The prefabricated pier of the falling T head piece 15 of lifting is installed in Dun Ding and pier stud 10 temporary consolidations behind the erection support of pier top.The pier head piece becomes the part of girder, and globality is stronger.
Erecting bridge floor longeron 122 on the pier head piece.
Early strong, high-strength concretes in the cast-in-place bonding surface 125, treat that concrete reaches design strength after, the stretch-draw longitudinal prestressing strands.
Remove the temporary consolidation between pier head piece and pier stud, finish the system conversion.The interim affixed solution construction stage of pier head piece is stressed, and it is convenient to construct, fast and safely.Column and pier head piece are hinged, adopt seat structure stressed clear and definite, and the bearing life-span is long.
As the cross-section of bridge broad, the pier head piece is chosen arm when big, prefabricated pier head piece sectional.
As the cross-section of bridge broad, the pier head piece is chosen arm when big, and precast concrete pier head piece weight is heavier, lifting, when prefabricated pier head piece being installed having any problem, and (hoisting weight of little case beam is 120 tons, and pier head piece hoisting weight is controlled at about 150 tons.) can adopt steel stiff skeleton crossbeam.Steel stiff skeleton crossbeam sectional is made, and lifting, field Welding or bolt assembly unit can be made load-carrying members supporting bridge floor longeron after the stiff skeleton crossbeam is installed.The stiff skeleton crossbeam also can be formed combined system with steel and concrete.Cast-in-place bonding surface inner concrete is wrapped to form the pier head piece with the steel stiff skeleton, after concrete reaches design strength, and stretch-draw transverse prestress bundle.All the other job practicess and precast concrete pier head piece are similar.
Above-mentioned job practices can realize continuous structure requirement behind the first freely-supported, and method is simply effective.For improving the stress performance of temporary support crossbeam, can be on demand on the prefabricated pier head piece 15, on the steel stiff skeleton crossbeam 15 or install additional on the carriage and tiltedly draw support 152 to strengthen, tiltedly draw support 152 to be installed on prefabricated pier head piece 15, steel stiff skeleton crossbeam 15 or the carriage, suspension cable 153 can be arranged on demand, reduces the crossbeam moment of flexure.Tiltedly draw support 152 reusable.The visual field condition of practice of construction suits measures to local conditions to adopt flexibly the combination of one or more methods, comprises setting up on the bent cap behind the first simply supported beam continuously and continuous job practices behind the first freely-supported on the falsework.
The place, shrinkage joint can adopt easy construction, becomes integral body with bridge pier, the anti-good bent cap of falling T of ability that laterally topples.
Above-mentioned bridge erection method has reduced the structural construction height, has reduced the bridge floor absolute altitude, has reduced construction costs.Structure improves integral bridge continuously, and road-ability is good, and noise effect is little, good endurance.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all technician in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. bridge erection method, it may further comprise the steps:
A) at least two pier columns that are provided with at interval of cast;
B) prefabricated pier head piece is arranged the transverse prestress bundle in described pier head piece;
C) after described pier head piece concrete is consolidated firmly, stretch-draw transverse prestress bundle;
D) the described pier head piece of lifting behind the erection support of pier top is installed in Dun Ding, with described pier column steel plate and reinforcing bar temporary consolidation;
E) erecting bridge floor longeron on described pier head piece;
F) described bridge floor longeron end face and described pier head piece side cast-in-situ concrete bonding surface, in described bonding surface cast-in-place morning strong, high-strength concrete;
G) after described bonding surface inner concrete is consolidated firmly, the longitudinal prestressing strands of the described longeron of stretch-draw;
H) remove described steel plate and described reinforcing bar, make system convert continuous beam to.
2. bridge erection method according to claim 1 is characterized in that: described pier head piece is segmentation manufacturing, lifting back assembly unit.
3. bridge erection method according to claim 2 is characterized in that: described assembly unit comes assembly unit by stretch-draw transverse prestress bundle.
4. bridge erection method according to claim 1 is characterized in that: in step c), described transverse prestress bundle is stretch-draw in batches.
5. bridge erection method according to claim 1 is characterized in that: described pier head piece uses the stiff skeleton crossbeam.
6. bridge erection method according to claim 1 or 5 is characterized in that: tiltedly draw support to strengthen installing additional on the described prefabricated pier head piece or on the interim carriage.
7. bridge erection method according to claim 5 is characterized in that: described stiff skeleton crossbeam uses steel to be material.
8. bridge erection method according to claim 5 is characterized in that: the combining structure that described stiff skeleton crossbeam uses steel and concrete to form, described combining structure is that concrete waters a layer concrete again above having added the described bonding surface of longeron.
9. bridge erection method according to claim 5, it is characterized in that: the combining structure that described stiff skeleton crossbeam uses steel and concrete to form, described combining structure is poured into a mould described bonding surface again for to spread concrete on the steel work of described stiff skeleton crossbeam.
10. bridge erection method according to claim 1 is characterized in that: in step d), described steel plate uses welding or bolt to be connected with described reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010591496 CN102021889A (en) | 2010-12-16 | 2010-12-16 | Bridge erection method |
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|---|---|---|---|
| CN 201010591496 CN102021889A (en) | 2010-12-16 | 2010-12-16 | Bridge erection method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286924A (en) * | 2011-06-30 | 2011-12-21 | 石家庄市环城公路建设指挥部办公室 | Bridge construction method with inverted procedures |
| CN102747677A (en) * | 2012-07-27 | 2012-10-24 | 中铁三局集团有限公司 | Bridge and construction method thereof |
| CN102787551A (en) * | 2012-07-16 | 2012-11-21 | 长沙理工大学 | Method for determining small bridge mixed continuous system structure in short pier prestressed concrete |
| CN103938533A (en) * | 2013-01-23 | 2014-07-23 | 上海市城市建设设计研究总院 | Simple-supported continuous structure and construction method thereof |
| CN103938546A (en) * | 2013-01-23 | 2014-07-23 | 上海市城市建设设计研究总院 | Simple-supported continuous construction method and structure thereof |
| CN105780643A (en) * | 2014-12-23 | 2016-07-20 | 任丘市永基建筑安装工程有限公司 | Concrete pier cast-in-place construction method |
| CN106120568A (en) * | 2016-08-18 | 2016-11-16 | 德州市公路工程总公司 | Cross a river Main Bridge bridge pier secondary locking temporary consolidation structure and construction method |
| CN106498842A (en) * | 2016-12-19 | 2017-03-15 | 厦门市市政工程设计院有限公司 | A kind of voluntarily axle beam and its method of construction under existing elevated bridge |
| CN108086126A (en) * | 2017-12-19 | 2018-05-29 | 厦门市市政建设开发有限公司 | Monoblock type bicycle occupation bridge structure and its construction method |
| CN108625284A (en) * | 2018-06-08 | 2018-10-09 | 苏交科集团股份有限公司 | Assembled concrete beam plate and installation and method for maintaining |
| CN109183603A (en) * | 2018-09-30 | 2019-01-11 | 福州大学 | The semi-rigid pier beam connecting structure and construction method of moment of flexure are not transmitted |
| CN110939051A (en) * | 2019-12-12 | 2020-03-31 | 成都轨道建设管理有限公司 | Subway hidden cover beam construction method |
| CN110983983A (en) * | 2019-12-20 | 2020-04-10 | 同济大学建筑设计研究院(集团)有限公司 | Construction method of fixed end beam and fixed end beam structure |
| CN112482231A (en) * | 2020-11-27 | 2021-03-12 | 上海宝冶冶金工程有限公司 | Construction method for prefabricated section of upper structure of viaduct |
| CN112962417A (en) * | 2021-02-25 | 2021-06-15 | 四川省公路规划勘察设计研究院有限公司 | Continuous structure suitable for bent slope and inclined steel plate girder bridge and construction method thereof |
| CN113512932A (en) * | 2021-03-19 | 2021-10-19 | 宁波市政工程建设集团股份有限公司 | Prestressed steel beam connected prefabricated small box girder type hidden cover beam and construction method thereof |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286924A (en) * | 2011-06-30 | 2011-12-21 | 石家庄市环城公路建设指挥部办公室 | Bridge construction method with inverted procedures |
| CN102787551A (en) * | 2012-07-16 | 2012-11-21 | 长沙理工大学 | Method for determining small bridge mixed continuous system structure in short pier prestressed concrete |
| CN102787551B (en) * | 2012-07-16 | 2014-04-30 | 长沙理工大学 | Method for determining small bridge mixed continuous system structure in short pier prestressed concrete |
| CN102747677A (en) * | 2012-07-27 | 2012-10-24 | 中铁三局集团有限公司 | Bridge and construction method thereof |
| CN102747677B (en) * | 2012-07-27 | 2014-05-28 | 中铁三局集团有限公司 | Bridge and construction method thereof |
| CN103938533A (en) * | 2013-01-23 | 2014-07-23 | 上海市城市建设设计研究总院 | Simple-supported continuous structure and construction method thereof |
| CN103938546A (en) * | 2013-01-23 | 2014-07-23 | 上海市城市建设设计研究总院 | Simple-supported continuous construction method and structure thereof |
| CN103938533B (en) * | 2013-01-23 | 2016-01-20 | 上海市城市建设设计研究总院 | The construction method of Simply supported non-uniform structure |
| CN103938546B (en) * | 2013-01-23 | 2016-02-10 | 上海市城市建设设计研究总院 | Simply supported non-uniform construction method |
| CN105780643A (en) * | 2014-12-23 | 2016-07-20 | 任丘市永基建筑安装工程有限公司 | Concrete pier cast-in-place construction method |
| CN106120568A (en) * | 2016-08-18 | 2016-11-16 | 德州市公路工程总公司 | Cross a river Main Bridge bridge pier secondary locking temporary consolidation structure and construction method |
| CN106120568B (en) * | 2016-08-18 | 2017-09-26 | 德州市公路工程总公司 | The construction method of cross a river Main Bridge bridge pier secondary locking temporary consolidation structure |
| CN106498842A (en) * | 2016-12-19 | 2017-03-15 | 厦门市市政工程设计院有限公司 | A kind of voluntarily axle beam and its method of construction under existing elevated bridge |
| CN108086126A (en) * | 2017-12-19 | 2018-05-29 | 厦门市市政建设开发有限公司 | Monoblock type bicycle occupation bridge structure and its construction method |
| CN108625284A (en) * | 2018-06-08 | 2018-10-09 | 苏交科集团股份有限公司 | Assembled concrete beam plate and installation and method for maintaining |
| CN109183603A (en) * | 2018-09-30 | 2019-01-11 | 福州大学 | The semi-rigid pier beam connecting structure and construction method of moment of flexure are not transmitted |
| CN110939051A (en) * | 2019-12-12 | 2020-03-31 | 成都轨道建设管理有限公司 | Subway hidden cover beam construction method |
| CN110983983A (en) * | 2019-12-20 | 2020-04-10 | 同济大学建筑设计研究院(集团)有限公司 | Construction method of fixed end beam and fixed end beam structure |
| CN110983983B (en) * | 2019-12-20 | 2021-11-16 | 同济大学建筑设计研究院(集团)有限公司 | Construction method of fixed end beam and fixed end beam structure |
| CN112482231A (en) * | 2020-11-27 | 2021-03-12 | 上海宝冶冶金工程有限公司 | Construction method for prefabricated section of upper structure of viaduct |
| CN112962417A (en) * | 2021-02-25 | 2021-06-15 | 四川省公路规划勘察设计研究院有限公司 | Continuous structure suitable for bent slope and inclined steel plate girder bridge and construction method thereof |
| CN113512932A (en) * | 2021-03-19 | 2021-10-19 | 宁波市政工程建设集团股份有限公司 | Prestressed steel beam connected prefabricated small box girder type hidden cover beam and construction method thereof |
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Application publication date: 20110420 |