CN108774948A - A kind of segment free cantilever erection pier cap beam and its assembling method - Google Patents
A kind of segment free cantilever erection pier cap beam and its assembling method Download PDFInfo
- Publication number
- CN108774948A CN108774948A CN201810707303.5A CN201810707303A CN108774948A CN 108774948 A CN108774948 A CN 108774948A CN 201810707303 A CN201810707303 A CN 201810707303A CN 108774948 A CN108774948 A CN 108774948A
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- China
- Prior art keywords
- segment
- fulcrum
- mosaic face
- bent cap
- face
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Classifications
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- 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
-
- 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
- E01D19/04—Bearings; Hinges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a kind of boom segments assembly pier cap beams of suitable live fast and safe construction, it is characterized in that the bent cap is spliced along bent cap length by several preform lid girder segments, joint form between contiguous prefabricated bent cap segment is the vertical splicing seams of corbel type, the bent cap segment of seam both sides sets shear connector, the end coating epoxy adhesive of the preform lid girder segment is glued by epoxy adhesive between contiguous prefabricated segment.The bent cap of this erection method is conducive to promote the miniaturization and lightweight of precast assembly component, reduces the difficulty of transport, lifting, under the conditions of same transporting and hoisting, makes more wide bridge bent caps that precast assembly construction may be used, reduces operating expenses.
Description
Technical field
The present invention relates to the structure design technical field of construction of bridge, more particularly to a kind of prefabricated assembled pier cap beam
Structure type, specially a kind of segment free cantilever erection pier cap beam and its assembling method.
Background technology
In recent years, prefabricated assembled bridge has been obtained wideling popularize and more and more applied in China.
Prefabricated assembled bridge is shortened the construction period with it, improves efficiency, reduces influence of the construction to present situation traffic, is adapted to modern
The many advantages such as change, intensive manufacture development model are received extensive attention and are studied.The bridge prefabrication assembling technique master of early stage
It to be directed to superstructure, with the development of urban economy, the raising of city integrated level, to environmental requirement higher, to applying
More stringent requirements are proposed for work technical merit, therefore the precast assembly technology of bridge also experienced a hair by top to lower part
Exhibition process.
In the pier cap beam structure of bridge lower part, traditional sets up support cast-in-place construction method, and construction safety degree is relatively low, mould
The maintenance that pours of plate set up with concrete makes the Cast-in-place Bent Cap occupancy surface road time longer, to the shadow of present situation traffic above-ground
Sound is larger, and the advantage of superstructure prefabrication and assembly construction cannot fully demonstrate in the construction of entire engineering, be particularly unsuitable for busy
Urban Bridge Construction.
The prefabricated assembled bent cap gradually promoted and applied in recent years is constructed, significantly using prefabrication, field installation process
Project progress is accelerated, field operation time is reduced.Without holder quick construction technology, the shadow to site traffic is considerably reduced
It rings.The standardized mode of production improves economic benefit, ensure that the quality of production, accelerates construction speed, in addition, due to scene
Operation, which substantially reduces, also substantially increases construction safety degree.
But when bridge is wide and bent cap choose arm it is larger when, the length of bent cap and dead weight also increase therewith.Excessive dead weight, no
But the lifting construction of bent cap is impacted, also the safety to surface road and bridge in transit and durability cause unfavorable
It influences.
So in current precast assembly bent cap design and construction, restricted by Lifting Capacity and traffic condition, for length
It spends larger bent cap and often still uses traditional cast-in-place method.Also have in recent years and prefabricated is answered with the cast-in-place practice for being combined bent cap
With but if can be that bent cap precast assembly provide a kind of reliable, efficient erection method in structure and technique, being beneficial to subtract
Limited bracket is set up and cast in situs, further saves cost, convenient for construction.
Invention content
The object of the present invention is to provide a kind of segment free cantilever erection pier cap beams of suitable live fast and safe construction.It is this
The Coping Construction of erection method is convenient, fast, safe, and the scene of avoiding is set up holder and concreting, reduced to scene
The influence of traffic so that under existing Lifting Capacity and traffic condition, can realize compared with the wide bent cap of bridge without supporting frame prefabrication assembly
Construction.
To achieve the goals above, the technical scheme is that：A kind of segment free cantilever erection pier cap beam, feature exist
It is spliced by several preform lid girder segments along bent cap length in the bent cap, the seam shape between contiguous prefabricated bent cap segment
Formula is the vertical splicing seams of corbel type, and the bent cap segment of seam both sides sets shear connector.
Further, the end coating epoxy adhesive of the preform lid girder segment passes through ring between contiguous prefabricated segment
Oxygen binder is glued.
Further, corresponding reinforcing bar hole is equipped in several described preform lid girder segments, it is described after being spliced into bent cap
Reinforcing bar hole connects into continuous deformed bar channel, and installs permanent prestress steel in the deformed bar channel
Muscle.
Further, the bent cap is rectangle bent cap or Inverted T beam.
Further, the preform lid girder segment includes fulcrum segment and the boom segments positioned at fulcrum segment both sides,
The lower part of central bearing point segment is stretched out, and fulcrum interconnecting piece is formed, and the top surface of the fulcrum interconnecting piece forms horizontal Mosaic face, which connects
The lower end surface of socket part forms lower vertical Mosaic face, and fulcrum segment upper end then forms upper vertical Mosaic face；Cantilever section
The top of section is stretched out, and forms cantilever connection, the bottom surface of the cantilever connection forms horizontal Mosaic face, the end of the cantilever connection
Portion forms lower vertical Mosaic face, and the upper end of boom segments forms upper vertical Mosaic face；In fulcrum segment and cantilever
It is also correspondingly provided with several shear connectors on the lower vertical Mosaic face and upper vertical Mosaic face of segment.
It is a further object of the present invention to provide a kind of segment free cantilever erection pier cap beams of suitable live fast and safe construction
Assembling method.The Coping Construction of this erection method is convenient, fast, safe, and holder and concreting are set up in the scene of avoiding,
Reduce the influence to site traffic so that under existing Lifting Capacity and traffic condition, can realize the nothing compared with the wide bent cap of bridge
Supporting frame prefabrication assembling construction.
To achieve the goals above, the technical scheme is that：A kind of segment free cantilever erection pier cap beam assembling method,
It is characterized in that the assembling method includes the following steps：
A, preform lid girder segment, bent cap segment is equipped with horizontal Mosaic face and vertical Mosaic face, and is set on vertical Mosaic face
It includes fulcrum segment and the boom segments positioned at fulcrum segment both sides to have shear connector, the bent cap segment；
B, the fulcrum segment of installation and column connection；
C, the Mosaic face at fulcrum segment both ends is cleared up, and in splicing brushing epoxy adhesive；
D, the both sides cantilever end segment lifting after-applied interim prestressing force of level in place；
E, cure after-applied permanent prestressing force and remove interim prestressing force for be bonded dose.
Further, in step A, preform lid girder segment is included the following steps using the method for matching prefabricated construction：
Fulcrum segment prefabricated first, fulcrum segment lower part are stretched out, and fulcrum interconnecting piece, the top surface shape of the fulcrum interconnecting piece are formed
At horizontal Mosaic face, the end face of the fulcrum interconnecting piece forms lower vertical Mosaic face, and fulcrum segment upper end is then formed
The vertical Mosaic face in portion is additionally provided with several shear connectors on lower vertical Mosaic face and upper vertical Mosaic face；
After the completion of fulcrum precast segment, brushed on its horizontal Mosaic face, lower vertical Mosaic face and upper vertical Mosaic face
Interleaving agent；
Using the end of the fulcrum segment as template, prefabricated boom segments so that boom segments and fulcrum segment form strict
Cooperation；
Boom segments and fulcrum segment are detached, and wash away its end face, the interleaving agent of end face is washed away totally.
The method have the characteristics that：
1, prefabricated bent cap is segmented prefabricated, the weight of prefabricated bent cap is significantly reduced, the difficulty of transport, lifting is reduced, subtracts
The light influence to ground road and bridge in transit.Under the conditions of same transporting and hoisting, more wide bridge bent caps is allow to adopt
It is constructed with precast assembly, reduces operating expenses.
2, free cantilever erection is constructed, and Mosaic face is glued using epoxy adhesive, and splicing applies interim prestressing force, scene
Construction time is short, and site workload is small, without setting up holder, template, reduces the influence to site traffic, also improves
Construction safety degree.
3, the vertical piece of corbel type is effectively reduced without the difficulty of construction for supporting vertical piece and wind construction danger, construction letter
Single quick, quality is easy to ensure.
Description of the drawings
Fig. 1 is the schematic diagram in free cantilever erection pier cap beam in segment of the present invention assembled stage.
Fig. 2 is free cantilever erection pier cap beam in segment of the present invention into bridge stage cross-sectional view.
Specific implementation mode
The present invention will be described in detail for Figure of description and specific embodiment below according to the present invention.
Figure includes：Fulcrum segment 1, boom segments 2, interim deformed bar 3, permanent deformed bar 4.
As shown, a kind of segment free cantilever erection pier cap beam, it is characterised in that the bent cap is along bent cap length by several
A preform lid girder segment is spliced, and the joint form between contiguous prefabricated bent cap segment is the vertical splicing seams of corbel type, described
The vertical splicing seams of corbel type include vertical splicing seams and horizontal splicing seams, and the bent cap segment of seam both sides sets shear connector, institute
The end coating epoxy adhesive of preform lid girder segment is stated, is glued by epoxy adhesive between contiguous prefabricated segment.
As shown, the preform lid girder segment includes fulcrum segment 1 and the boom segments 2 positioned at fulcrum segment both sides.
The lower part of its central bearing point segment is stretched out, and fulcrum interconnecting piece is formed, and the top surface of the fulcrum interconnecting piece forms horizontal Mosaic face, the fulcrum
The end face of interconnecting piece forms lower vertical Mosaic face, and fulcrum segment upper end then forms upper vertical Mosaic face, in lower part
Several shear connectors are additionally provided on vertical Mosaic face and upper vertical Mosaic face, in the horizontal Mosaic face, lower vertical Mosaic face
With upper vertical Mosaic face brushing epoxy adhesive.
The top of boom segments is stretched out, and cantilever connection is formed, and the bottom surface of the cantilever connection forms horizontal Mosaic face, should
The end of cantilever connection forms lower vertical Mosaic face, and the upper end of boom segments forms upper vertical Mosaic face.
In order to ensure that its coordinates precision, using the method for matching prefabricated construction when processing, i.e., in fulcrum segment prefabricated first,
Fulcrum segment lower part is stretched out, and fulcrum interconnecting piece is formed, and the top surface of the fulcrum interconnecting piece forms horizontal Mosaic face, which connects
The end face of socket part forms lower vertical Mosaic face, and fulcrum segment upper end then forms upper vertical Mosaic face, hangs down in lower part
It is additionally provided with several shear connectors on straight Mosaic face and upper vertical Mosaic face.After the completion of fulcrum precast segment, its horizontal Mosaic face,
Equal brushing interleaving agent on lower vertical Mosaic face and upper vertical Mosaic face, is hanged using the end of the fulcrum segment as template
Arm joint section it is prefabricated so that boom segments and fulcrum segment form the cooperation to fit together perfectly.After the completion of boom segments are prefabricated, it will hang
Arm joint section and the separation of fulcrum segment, and its end face is washed away, the interleaving agent of end face is washed away totally, is applied when being connected so as to both later stages
Brush epoxy adhesive.
Further, corresponding reinforcing bar hole is equipped in several described preform lid girder segments, it is described after being spliced into bent cap
Reinforcing bar hole connects into continuous deformed bar channel, and the prestressed reinforcing bar in the deformed bar channel.
Currently used bent cap form has two kinds of rectangle bent cap and Inverted T beam, the light prefabricated assembled of this invention
Pier cap beam is adapted to both bent cap forms.
The present invention is along bent cap length precast segment, free cantilever erection.Control each segment focuses on transport and crane capacity certainly
Within the scope of, prefabricated construction is matched, it is the vertical splicing seams of corbel type, seam two that Mosaic face, which uses epoxy glue seam, joint form,
The segment of side sets shear connector.
When construction, the fulcrum segment being connect with column is installed first, brushing epoxy adhesive after face cleaning to be spliced works as a left side
The right boom segments lifting after-applied interim prestressing force of level in place need to be on fulcrum segment and a left side to apply horizontal interim prestressing force
The corresponding position of right boom segments installs interim anchor block, and the interim deformed bar 3 of tensioning between corresponding anchor block additional, applies water
Flat interim prestressed effect keeps the balance external of boom segments except through external force, and the more of Mosaic face are located at also for that will apply
Remaining epoxy adhesive squeezes out.The to be bonded dose of permanent deformed bar of solidification post-stretching 4 is removed interim with applying permanent prestressing force
Deformed bar 3 and interim anchor block.
The bent cap of this erection method be conducive to promote precast assembly component miniaturization and lightweight, reduce transport,
The difficulty of lifting makes more wide bridge bent caps that precast assembly construction may be used, reduces construction under the conditions of same transporting and hoisting
Expense.Free cantilever erection construction eliminates support system, reduces site workload, accelerates construction speed, to traffic above-ground shadow
Sound is small, improves construction safety degree.The vertical piece of corbel type is effectively reduced and is applied without the difficulty of construction and wind for supporting vertical piece
Work danger, construction is simple is quick, splices precision and reliability is high, quality is easy to ensure.Suitable for currently used bent cap section shape
Formula.
Claims (7)
1. a kind of segment free cantilever erection pier cap beam, it is characterised in that the bent cap is along bent cap length by several prefabricated bent cap sections
Section is spliced, and the joint form between contiguous prefabricated bent cap segment is the vertical splicing seams of corbel type, the bent cap section of seam both sides
Section end face sets shear connector.
2. a kind of segment free cantilever erection pier cap beam as described in claim 1, which is characterized in that the preform lid girder segment
End coating epoxy adhesive is glued by epoxy adhesive between contiguous prefabricated segment.
3. a kind of segment free cantilever erection pier cap beam as described in claim 1, which is characterized in that several described prefabricated bent caps
Corresponding reinforcing bar hole is equipped in segment, after being spliced into bent cap, the reinforcing bar hole connects into continuous deformed bar channel,
And the prestressed reinforcing bar in the deformed bar channel.
4. a kind of segment free cantilever erection pier cap beam as described in claim 1, which is characterized in that the bent cap is rectangle bent cap
Or Inverted T beam.
5. a kind of segment free cantilever erection pier cap beam as described in claim 1, which is characterized in that the preform lid girder segment packet
Fulcrum segment and the boom segments positioned at fulcrum segment both sides are included, the lower part of central bearing point segment is stretched out, and fulcrum interconnecting piece is formed,
The top surface of the fulcrum interconnecting piece forms horizontal Mosaic face, and the lower end surface of the fulcrum interconnecting piece forms lower vertical Mosaic face, branch
Point segment upper end then forms upper vertical Mosaic face；The top of boom segments is stretched out, and cantilever connection is formed, which connects
The bottom surface of socket part forms horizontal Mosaic face, and the end of the cantilever connection forms lower vertical Mosaic face, and boom segments is upper
Portion end forms upper vertical Mosaic face；Lower vertical Mosaic face and upper vertical Mosaic face in fulcrum segment and boom segments
On be also correspondingly provided with several shear connectors.
6. a kind of segment free cantilever erection pier cap beam assembling method, it is characterised in that the assembling method includes the following steps：
A, preform lid girder segment, bent cap segment is equipped with horizontal Mosaic face and vertical Mosaic face, and is set on vertical Mosaic face
It includes fulcrum segment and the boom segments positioned at fulcrum segment both sides to have shear connector, the bent cap segment；
B, the fulcrum segment of installation and column connection；
C, the Mosaic face at fulcrum segment both ends is cleared up, and in splicing brushing epoxy adhesive；
D, the both sides cantilever end segment lifting after-applied interim prestressing force of level in place；
E, cure after-applied permanent prestressing force and remove interim prestressing force for be bonded dose.
7. a kind of segment free cantilever erection pier cap beam assembling method as described in claim 1, which is characterized in that in step A,
Preform lid girder segment is included the following steps using the method for matching prefabricated construction：
Fulcrum segment prefabricated first, fulcrum segment lower part are stretched out, and fulcrum interconnecting piece, the top surface shape of the fulcrum interconnecting piece are formed
At horizontal Mosaic face, the end face of the fulcrum interconnecting piece forms lower vertical Mosaic face, and fulcrum segment upper end is then formed
The vertical Mosaic face in portion is additionally provided with several shear connectors on lower vertical Mosaic face and upper vertical Mosaic face；
After the completion of fulcrum precast segment, brushed on its horizontal Mosaic face, lower vertical Mosaic face and upper vertical Mosaic face
Interleaving agent；
Using the end of the fulcrum segment as template, prefabricated boom segments so that boom segments and fulcrum segment form strict
Cooperation；
Boom segments and fulcrum segment are detached, and wash away its end face, the interleaving agent of end face is washed away totally.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810707303.5A CN108774948A (en) | 2018-07-02 | 2018-07-02 | A kind of segment free cantilever erection pier cap beam and its assembling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810707303.5A CN108774948A (en) | 2018-07-02 | 2018-07-02 | A kind of segment free cantilever erection pier cap beam and its assembling method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853362A (en) * | 2019-03-29 | 2019-06-07 | 上海应用技术大学 | A kind of interim prestress anchoraging prefabricated bent cap of segmentation and interim method for applying prestressing force |
| CN110258303A (en) * | 2019-06-04 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | The design method of Straddle type monorail bridge and its T pier with big line spacing T pier |
| CN110409304A (en) * | 2019-07-12 | 2019-11-05 | 上海城建市政工程（集团）有限公司 | A kind of precast segment bent cap free cantilever erection construction method |
| CN110565506A (en) * | 2019-09-23 | 2019-12-13 | 上海市城市建设设计研究总院（集团）有限公司 | Segmental prefabricated assembled bent cap and construction method thereof |
| CN111608084A (en) * | 2020-05-29 | 2020-09-01 | 中国铁建大桥工程局集团有限公司 | Integral prefabrication and assembly construction method for reinforced concrete arch bridge arch ring segments |
| CN111648247A (en) * | 2020-05-29 | 2020-09-11 | 中铁建大桥工程局集团第二工程有限公司 | Multi-stage assembled capping beam and construction process thereof |
| CN112431138A (en) * | 2020-11-17 | 2021-03-02 | 上海市基础工程集团有限公司 | Accurate positioning and rapid assembling method for dry-joint cantilever bent cap |
| CN112695648A (en) * | 2020-12-07 | 2021-04-23 | 上海建工集团股份有限公司 | Bent cap suspension splicing construction system and construction method thereof |
| CN113638304A (en) * | 2021-07-13 | 2021-11-12 | 宁波市政工程建设集团股份有限公司 | Concrete beam type bridge hidden cover beam structure system and construction method thereof |
| CN114457702A (en) * | 2022-02-21 | 2022-05-10 | 中建七局交通建设有限公司 | Large cantilever sectional type prefabricated bent cap support-free suspension splicing construction method |
| CN114673077A (en) * | 2022-03-21 | 2022-06-28 | 中铁第四勘察设计院集团有限公司 | Ultra-high performance concrete gate-type pier structure and construction method |
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| CN109853362A (en) * | 2019-03-29 | 2019-06-07 | 上海应用技术大学 | A kind of interim prestress anchoraging prefabricated bent cap of segmentation and interim method for applying prestressing force |
| CN109853362B (en) * | 2019-03-29 | 2021-02-26 | 上海应用技术大学 | Temporary prestressed anchoring segmented prefabricated capping beam and temporary prestress applying method |
| CN110258303A (en) * | 2019-06-04 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | The design method of Straddle type monorail bridge and its T pier with big line spacing T pier |
| CN110409304B (en) * | 2019-07-12 | 2021-04-02 | 上海城建市政工程（集团）有限公司 | Cantilever assembling construction method for segment prefabricated bent cap |
| CN110409304A (en) * | 2019-07-12 | 2019-11-05 | 上海城建市政工程（集团）有限公司 | A kind of precast segment bent cap free cantilever erection construction method |
| CN110565506A (en) * | 2019-09-23 | 2019-12-13 | 上海市城市建设设计研究总院（集团）有限公司 | Segmental prefabricated assembled bent cap and construction method thereof |
| CN110565506B (en) * | 2019-09-23 | 2024-04-09 | 上海市城市建设设计研究总院（集团）有限公司 | Segmental prefabricated assembled bent cap and construction method thereof |
| CN111608084A (en) * | 2020-05-29 | 2020-09-01 | 中国铁建大桥工程局集团有限公司 | Integral prefabrication and assembly construction method for reinforced concrete arch bridge arch ring segments |
| CN111608084B (en) * | 2020-05-29 | 2022-03-29 | 中国铁建大桥工程局集团有限公司 | Integral prefabrication and assembly construction method for reinforced concrete arch bridge arch ring segments |
| CN111648247A (en) * | 2020-05-29 | 2020-09-11 | 中铁建大桥工程局集团第二工程有限公司 | Multi-stage assembled capping beam and construction process thereof |
| CN112431138A (en) * | 2020-11-17 | 2021-03-02 | 上海市基础工程集团有限公司 | Accurate positioning and rapid assembling method for dry-joint cantilever bent cap |
| CN112695648A (en) * | 2020-12-07 | 2021-04-23 | 上海建工集团股份有限公司 | Bent cap suspension splicing construction system and construction method thereof |
| CN113638304A (en) * | 2021-07-13 | 2021-11-12 | 宁波市政工程建设集团股份有限公司 | Concrete beam type bridge hidden cover beam structure system and construction method thereof |
| CN113638304B (en) * | 2021-07-13 | 2022-10-25 | 宁波市政工程建设集团股份有限公司 | Concrete beam type bridge hidden cover beam structure system and construction method thereof |
| CN114457702A (en) * | 2022-02-21 | 2022-05-10 | 中建七局交通建设有限公司 | Large cantilever sectional type prefabricated bent cap support-free suspension splicing construction method |
| CN114673077A (en) * | 2022-03-21 | 2022-06-28 | 中铁第四勘察设计院集团有限公司 | Ultra-high performance concrete gate-type pier structure and construction method |
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