CN208039073U - A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction - Google Patents
A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction Download PDFInfo
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- CN208039073U CN208039073U CN201820517319.5U CN201820517319U CN208039073U CN 208039073 U CN208039073 U CN 208039073U CN 201820517319 U CN201820517319 U CN 201820517319U CN 208039073 U CN208039073 U CN 208039073U
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- top plate
- prefabricated case
- hogging moment
- case beam
- box girder
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Abstract
The utility model is related to a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction, including prefabricated case beam, the prefabricated case beam top plate thick section to indoor thickening is provided on prefabricated case beam top plate, prefabricated case beam top plate thick section is provided with steel Shu Zhangla preformed grooves；Prefabricated case beam top plate is provided with transverse and longitudinal bar construction in thick section.The utility model by hogging moment steel beam length range and extended the box beam top plate of 10 ~ 15cm of stretching notch and thickeied in prefabricated box -beam, and the top plate section that thickens for thickening end setting 30cm or so is transitioned into normal thickness；It is thickeied into chamber by top plate, meets the needs of hogging moment area circle anchorage stretch-draw anchor, there is the space for not having to occupy deck paving；Top plate lower layer steel bar stress will not be blocked, stretching notch later stage stress is improved；The tensioning steel beam on bridge floor；Meet the needs for arranging more steel beams；The advantages that improving hogging moment area structure stress, facilitating tensioning, mud jacking.
Description
Technical field
The utility model is related to bridge construction field of engineering technology, and in particular to a kind of assembled continuous box girder hogging moment steel
Beam anchorage zone constructs.
Background technology
Structure continuous box girder is a kind of common bridge type in highway bridge after assembled elder generation freely-supported, is needed in system transform
Prestressed strand, reliability and construction of the rational hogging moment area steel beam anchoring structure to structure stress is arranged in fulcrum hogging moment area
Convenience it is most important.The hogging moment steel Shu Caiyong flat anchorages of structure continuous box girder, match after current assembled elder generation freely-supported
Flat bellows are covered, anchorage zone is configured to box beam original section construction.Flat anchorage need to be by root tensioning steel beam, and tensioning efficiency is low,
And mating flat bellows rigidity is low, when construction, is easily deformed, and influences lashing, the mud jacking in later stage, to construction quality, structure by
Power and structure durability are affected.It needs to make circle corrugated pipe and round anchorage into thus, round anchorage wants anchorage zone size
Bigger is sought, box beam top plate thickness is small, cannot meet anchorage arrangement and force request, and common way is that part adds upward or downward
Thick top plate.The space of pave-load layer can be occupied by thickening upwards, and part, which thickeies, downwards need to cut off top plate stress main reinforcement, be unfavorable for floorings
Stress.
Utility model content
The purpose of this utility model is to provide a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction, construction party
Just, securely and reliably, it is adapted to round anchorage.
Technical solution used by the utility model is：
A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction, it is characterised in that：
Including prefabricated case beam, the prefabricated case beam top plate thick section to indoor thickening is provided on prefabricated case beam top plate, it is prefabricated
Box beam top plate thick section is provided with steel Shu Zhangla preformed grooves；
Prefabricated case beam top plate is provided with transverse and longitudinal bar construction in thick section.
Transverse and longitudinal bar construction includes the lateral stressed main reinforcement of floorings of closed loop, the levels point of the lateral stressed main reinforcement of floorings
It is not provided with top plate upper layer longitudinal reinforcement and top plate lower layer longitudinal reinforcement.
Longitudinal stretch-draw anchor beam is provided between top plate upper layer longitudinal reinforcement and top plate lower layer longitudinal reinforcement.
It is arranged at intervals with longitudinal notch between adjacent stretch-draw anchor beam and passes through beam.
It is provided with horizontal preformed groove bottom concrete below the lateral stressed main reinforcement understructure of floorings.
The prefabricated case beam thickness in inclined-plane is provided between prefabricated case beam top plate thick section and prefabricated case beam top plate normal reach
Changeover portion.
The utility model has the following advantages：
The utility model by hogging moment steel beam length range and extended the case of 10 ~ 15cm of stretching notch in prefabricated box -beam
Back plate thickeies.Thicken thickness according to round anchorage arrangement and when steel Shu Zhangla jack arrangement space it needs to be determined that, on condition that
Do not allow to block floorings lower layer reinforcing bar, reserving notch in steel beam anchorage point is used for later stage tensioning hogging moment steel beam.Thicken end
The top plate of end setting 30cm or so the section that thickens is transitioned into normal thickness.It is thickeied into chamber by top plate, meets hogging moment area circle
The needs of shape anchorage stretch-draw anchor have the space for not having to occupy deck paving；Top plate lower layer steel bar stress will not be blocked, is improved
Stretching notch later stage stress；The tensioning steel beam on bridge floor；Meet the needs for arranging more steel beams；Improve hogging moment area structure by
Power, the advantages that facilitating tensioning, mud jacking.
Description of the drawings
Fig. 1 is that prefabricated case beam top plate thickeies sectional view.
Fig. 2 is that notch steel bar arrangement schematic diagram is reserved in tensioning.
Fig. 3 is that hogging moment steel beam anchors schematic diagram.
In figure, the lateral stressed main reinforcement of 1- floorings, 2- top plates upper layer longitudinal reinforcement, 3- notches pass through beam, 4- stretch-draw anchors
Beam, 5- top plates lower layer longitudinal reinforcement, 6- preformed groove bottom concretes, 7- fulcrums side, 8- steel Shu Zhangla preformed grooves, 9- top plates thicken
End, 10- top plate thickness changeover portions, 11- top plate normal reaches, 12- span centres side.
Specific implementation mode
The utility model is described in detail With reference to embodiment.
The utility model is related to a kind of assembled continuous box girder hogging moment steel beam anchorage zone constructions, including prefabricated case beam, in advance
The prefabricated case beam top plate thick section to indoor thickening, prefabricated case beam top plate thick section and prefabricated case beam are provided on box beam top plate processed
The prefabricated case beam thickness transitions section in inclined-plane is provided between top plate normal reach.Prefabricated case beam top plate thick section is provided with steel beam
Draw preformed groove 8；Prefabricated case beam top plate is provided with transverse and longitudinal bar construction in thick section.
Transverse and longitudinal bar construction includes the lateral stressed main reinforcement 1 of floorings of closed loop, the levels of the lateral stressed main reinforcement of floorings 1
It is respectively arranged with top plate upper layer longitudinal reinforcement 2 and top plate lower layer longitudinal reinforcement 5.Top plate upper layer longitudinal reinforcement 2 and top plate lower layer are vertical
To being provided with longitudinal stretch-draw anchor beam 4 between reinforcing bar 5.It is logical that longitudinal notch is arranged at intervals between adjacent stretch-draw anchor beam 4
Cross beam 3.
It is provided with horizontal preformed groove bottom concrete 6 below lateral stressed 1 understructure of main reinforcement of floorings.
The construction method that structure continuous box girder hogging moment steel beam anchorage zone constructs after above-mentioned assembled elder generation freely-supported, including it is following
Step：
Step 1：In the lateral stressed main reinforcement 1 of prefabricated case beam top plate thick section prefabricated bridge, setting inner and outer template pours prefabricated
Box beam, and reserved steel Shu Zhangla preformed grooves 8；
8 top surface width of steel Shu Zhangla preformed grooves wide 5 ~ 7.5cm more each than bottom surface both side；Thick section top plate is directly to indoor thickening
12~17cm；
Step 2：It is when prefabricated case beam concreting, the preformed groove bottom concrete 6 at steel Shu Zhangla preformed grooves 8 is pre-
It first pours, the bed die that steel Shu Zhangla preformed grooves 8 seal concrete is poured as the later stage；Or do not pour in advance, and in steel Shu Zhangla
Reserve permanent bed die in 8 bottom of preformed groove；
Step 3：After prefabricated case beam is set up, the circle corrugated pipe to connect one to one along bridge two panels beam forwards, backwards, in pouring
Crossbeam concrete；
Step 4：Block the lateral stressed main reinforcement 1 of upper layer bridge panel and top plate upper layer longitudinal direction steel at steel Shu Zhangla preformed grooves 8
Muscle 2 reserves the required length of welding, or is broken to both sides after therefrom blocking；
Step 5：All hogging moment steel beams are penetrated into notch by beam 3, by the symmetrical stretch-draw anchor in beam both ends in anchorage
On, notch is carried out in time passes through 3 mud jacking of beam；
Step 6：The lateral stressed main reinforcement 1 of upper layer bridge panel being truncated and top plate upper layer longitudinal reinforcement 2 are connected, or is broken back,
Pour reserved slot seal concrete.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are new by reading this practicality
Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model
Cover.
Claims (6)
1. a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction, it is characterised in that：
Including prefabricated case beam, the prefabricated case beam top plate thick section to indoor thickening, prefabricated case beam are provided on prefabricated case beam top plate
Top plate thick section is provided with steel Shu Zhangla preformed grooves（8）；
Prefabricated case beam top plate is provided with transverse and longitudinal bar construction in thick section.
2. a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction according to claim 1, it is characterised in that：
Transverse and longitudinal bar construction includes the lateral stressed main reinforcement of floorings of closed loop（1）, the lateral stressed main reinforcement of floorings（1）Levels
It is respectively arranged with top plate upper layer longitudinal reinforcement（2）With top plate lower layer longitudinal reinforcement（5）.
3. a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction according to claim 2, it is characterised in that：
Top plate upper layer longitudinal reinforcement（2）With top plate lower layer longitudinal reinforcement（5）Between be provided with longitudinal stretch-draw anchor beam（4）.
4. a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction according to claim 3, it is characterised in that：
Adjacent stretch-draw anchor beam（4）Between be arranged at intervals with longitudinal notch and pass through beam（3）.
5. a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction according to claim 2, it is characterised in that：
The lateral stressed main reinforcement of floorings（1）It is provided with horizontal preformed groove bottom concrete below understructure（6）.
6. a kind of assembled continuous box girder hogging moment steel beam anchorage zone construction according to claim 1, it is characterised in that：
The prefabricated case beam thickness transitions in inclined-plane are provided between prefabricated case beam top plate thick section and prefabricated case beam top plate normal reach
Section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820517319.5U CN208039073U (en) | 2018-04-12 | 2018-04-12 | A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820517319.5U CN208039073U (en) | 2018-04-12 | 2018-04-12 | A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208039073U true CN208039073U (en) | 2018-11-02 |
Family
ID=63943789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820517319.5U Active CN208039073U (en) | 2018-04-12 | 2018-04-12 | A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN208039073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374346A (en) * | 2018-04-12 | 2018-08-07 | 中交第公路勘察设计研究院有限公司 | Assembled continuous box girder hogging moment steel beam anchorage zone constructs and its construction method |
-
2018
- 2018-04-12 CN CN201820517319.5U patent/CN208039073U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374346A (en) * | 2018-04-12 | 2018-08-07 | 中交第公路勘察设计研究院有限公司 | Assembled continuous box girder hogging moment steel beam anchorage zone constructs and its construction method |
| CN108374346B (en) * | 2018-04-12 | 2024-01-26 | 中交第一公路勘察设计研究院有限公司 | Steel beam anchoring area structure of negative bending moment of assembled continuous box girder and construction method thereof |
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