CN106351128B - The construction method of cable-stayed bridge end bay girder - Google Patents
The construction method of cable-stayed bridge end bay girder Download PDFInfo
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- CN106351128B CN106351128B CN201611070272.4A CN201611070272A CN106351128B CN 106351128 B CN106351128 B CN 106351128B CN 201611070272 A CN201611070272 A CN 201611070272A CN 106351128 B CN106351128 B CN 106351128B
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- construction
- girder
- pier
- end bay
- bridge
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of construction methods of cable-stayed bridge end bay girder, and this method comprises the following steps, carry out the construction of cable-stayed bridge main-beam support pier stud, and the support pier stud includes at least king-tower and auxiliary pier；Pier top beam section is poured in the support pier top end；Hanging Basket is installed in the pier top beam section；Using the Hanging Basket and centered on the auxiliary pier along bridge to extending end bay girder；The end bay girder and mounted transition beam section preparatory on the king-tower are joined the two sections of a bridge, etc, to complete the construction of end bay girder.Disclosed technical solution of the invention constructs to bridge end bay using Hanging Basket after the completion of pier stud construction, the end bay of bridge is made to construct not by topographic constraints, save the installation of a large amount of brackets, and working procedure is simple, convenient, can accelerate speed of application, saves the duration of a project.
Description
[technical field]
The present invention relates to field of bridge construction, the in particular to working procedure of cable-stayed bridge end bay girder and construction method neck
Domain.
[background technique]
The end bay of bridge is in the spanning between abutment and bridge pier, and the construction of bridge end bay girder is frequently with full hall at present
Support Method carries out.Raft support method is to take at regular intervals, gathers and sets up, the construction method of the scaffold to play a supportive role；
Construction with brackets is that bracket is set up at bridge location, and pontic concrete is poured on bracket, removes mould after concrete reaches intensity
Plate and bracket.Construction with brackets has shortcomings, and it is big, long in time limit to show as working rack template consumption, to mountain area
Bridge and Gao Dun have significant limitation；These disadvantages use it should not in the higher bridge construction of pier stud, also be not suitable for
In the end bay work progress of relatively large cable-stayed bridge.Cradle construction is applied to cable-stayed bridge by arrangement and method for construction provided by the present invention
The construction of end bay girder so that the construction of end bay girder be made to be no longer influenced by the limitation of landform, and can be realized and accelerate end bay girder
Construction speed, the purpose shortened the construction period.
For support pier stud of the support edge across girder compared to main pier, diameter or width is generally smaller, this is also just meaned
, the ability that the support pier stud of the end bay girder resists end bay girder generation unbalanced load in casting process is lower, and by
During cradle construction, the unbalanced load generated during end bay girder pouring construction is required to the branch of the end bay girder
Support pier stud is come when carrying, therefore being constructed using Hanging Basket to end bay girder, this is also increased in work progress due to described
Unbalanced load on end bay girder and end bay girder beam body capsizing case hair risk occurs.Therefore end bay girder beam body uses extension
Basket method applies the design that man-hour requirement carries out additional structure to the support pier stud of end bay girder, resists end bay girder beam body to improve it
The ability toppled.
[summary of the invention]
The purpose of the present invention is to provide do not limited by landform when cable-stayed bridge end bay main girder construction, the construction party of quick construction
Method.
To realize the purpose, the present invention adopts the following technical scheme:
The construction method of cable-stayed bridge end bay girder comprising following steps:
The construction of cable-stayed bridge main-beam support pier stud is carried out, the support pier stud includes at least king-tower and auxiliary pier；
Pier top beam section is poured in the support pier top end；
Hanging Basket is installed in the pier top beam section；
Using the Hanging Basket and centered on the auxiliary pier along bridge to extending end bay girder；
The end bay girder and mounted transition beam section preparatory on the king-tower are joined the two sections of a bridge, etc, to complete end bay master
The construction of beam.
Further, the support pier stud is equipped with the temporary anchoring structure for preventing girder from toppling comprising is set to institute
It states the support construction for being used to resist the vertical pressure from the continuous beam between support pier and the pier top beam section and is used for
The antidumping structure of the unbalanced moments generated in girder casting process is resisted, the antidumping structure includes being set to the support
The fastening reinforcing bar of steel-pipe pile and the connection steel-pipe pile and the pier top beam section around pier.
Specifically, setting up the bracket or bracket for pouring the pier top beam section on its periphery after the completion of support pier construction
And formwork for placing；
Preferably, the Hanging Basket is equipped with the anchor being anchored on girder and anchors simultaneously with Hanging Basket and the girder
Flexible protective rope, with for preventing the Hanging Basket from toppling.
Further, by the end bay girder and preparatory mounted transition beam section is joined the two sections of a bridge, etc on the king-tower step
Suddenly, comprising the following steps:
The hanger for installing closure section is set up using the Hanging Basket；Closure section concreting is set up using the hanger
Template；Pour closure section girder；After concrete strength reaches construction requirement, tensioning closure section girder along bridge to prestressed strand,
Complete closure section construction.
Specifically, the construction requirement is that concrete strength reaches 90% design strength and the age of concrete was not less than 7 days.
Preferably, the position for carrying out closure step further includes pair of the end bay girder with the access bridge that bank is arranged in
Connect position.
Further, the position for carrying out closure step further includes based on two adjacent extended end bay masters of auxiliary pier institute
The docking location of beam.
Optionally, after the hanger for installing closure section is set up using the Hanging Basket, the Hanging Basket is removed.
Compared with prior art, the present invention has following advantage:
The technical solution adopted in the present invention, by installing Hanging Basket in pier top beam section, and based on the Hanging Basket to end bay
Girder section construction, be based on cradle construction the advantages of, influence the construction of end bay girder by landform, relative to full hall
Support Method can also accelerate speed of application, save the construction period.
In addition, technical solution provided by the present invention, is provided with temporary anchoring structure on the support pier stud of end bay girder,
The temporary anchoring structure can increase the ability that the support pier stud resists unbalanced load, can make the side using construction cradle
There is higher working security in the construction process across girder, to reduce the risk of construction safety accident.Further, this hair
Hanging Basket used by technical solution provided by bright is also equipped with the anchor structure for enhancing its resistance to capsizing, is further ensured that and applies
Work safety.
[Detailed description of the invention]
Fig. 1 is the distribution schematic diagram of the construction method bridge pier of cable-stayed bridge end bay girder of the present invention.
Fig. 2 is the structural schematic diagram of the construction method pier top beam section of cable-stayed bridge end bay girder of the present invention.
Fig. 3 is the structural schematic diagram before the construction method end bay continuous beam beam body closure of cable-stayed bridge end bay girder of the present invention.
Fig. 4 is the construction method of cable-stayed bridge end bay girder of the present invention with the structural representation of the auxiliary pier of temporary anchoring structure
Figure.
[specific embodiment]
The present invention is further described with exemplary embodiment with reference to the accompanying drawing, wherein identical label in attached drawing
All refer to identical component.In addition, if the detailed description of known technology is for showing the invention is characterized in that unnecessary
, then it omits it.
Embodiment one
Fig. 1-Fig. 3 is please referred to, it illustrates the construction procedures of cable-stayed bridge end bay girder provided by the present invention, specific to wrap
It includes:
S1, carries out the construction of cable-stayed bridge main-beam support pier stud, and the support pier stud includes at least king-tower and auxiliary pier；
Such as Fig. 1, the support pier stud of cable-stayed bridge end bay girder includes king-tower 5, auxiliary pier 1 and abutment 6, and wherein auxiliary pier uses
Thin-wall Hollow Pier, half range bridge pier is as box-shaped cross-section.It further include each before the construction of the king-tower 5, auxiliary pier 1 and abutment 6
The bearing platform construction step of pier stud is supportted, the mode that the cushion cap and support pier stud of each support pier stud are all made of cast-in-place construction is completed.
S2 pours pier top beam section in the support pier top end；
As shown in Fig. 2, the mode that the support pier top end is all made of concrete cast-in-situ has pier top beam section.Wherein, bridge
Platform 6 and king-tower 5 are constructed using raft support method, main pylon pier side stand 52, abutment pier side stand 61, the specific steps are as follows:
Bracket is set up, sets up scaffold stand in the pier side of abutment and king-tower respectively；
Installation template sets up the formwork for placing of pier top beam section using the scaffold stand；
It pours, using concrete cast-in-situ construction casting concrete in the formwork for placing；
Maintenance, to the concrete poured carry out maintenance up to concrete strength reach 90% design strength grade point and
When the age of concrete is not less than 7 days, the tensioning beam section direction across bridge and along bridge to prestressed strand, complete pier top beam section and apply
Work.
Wherein, the pier top beam section that abutment pier side is poured is access bridge 62, and the pier top beam section that main pylon pier side is poured is transition
Bridge section 53.
The construction of auxiliary pier pier top beam section is constructed using bracket, the specific steps are as follows:
Set up bracket, along bridge to utilize auxiliary pier pier shaft and pier shaft accessory structure (steel-pipe pile of such as temporary anchoring structure)
Bracket is set up, construction bracket uses the form of shelf bracket on the outside of direction across bridge, and inside diaphragm plate uses the form of bearing support, top
Plate uses the form of full framing；
Installation template sets up the formwork for placing of pier top beam section using the bracket；
It pours, using concrete cast-in-situ construction casting concrete in the formwork for placing；
Maintenance, to the concrete poured carry out maintenance up to concrete strength reach 90% design strength grade point and
When the age of concrete is not less than 7 days, the tensioning beam section direction across bridge and along bridge to prestressed strand, complete pier top beam section and apply
Work.
S3 installs Hanging Basket in the pier top beam section；
Hanging Basket 3 is mounted in auxiliary pier pier top beam section, the primary structure of the Hanging Basket include: upper front beam, upper middle cross beam,
Bottom basket system, suspension system, main truss, rear anchor system, running gear, template system etc..Hanging Basket is applied to applying for end bay girder
Working hour needs the anchor measure enhanced it, prevents Hanging Basket from capsizing case occurring in the construction process.The anchoring of enhancing is arranged
Applying, which may is that increase in the rear anchor system of the Hanging Basket, promotes anchor, described to promote erecting in anchor and girder
It is anchored to presstressed reinforcing steel to provide the prestressing force of enhancing Hanging Basket resistance to capsizing；Or to be connected to main truss cradle two sides another for one end
Hold the flexible protective rope being connected in girder beam body；And the or combination for both the above structure.The assembled step of the Hanging Basket are as follows:
Surveying and locating-laying track bearing beam and track-installation main truss-installation harness system-installation bottom basket system.
S4, using the Hanging Basket and centered on the auxiliary pier along bridge to extending end bay girder；
Using the Hanging Basket, segmentation pours girder beam body, and the concrete strength that each section of beam body is poured reaches 90% design
When strength grade value and the age of concrete are not less than 7 days, the prestressed strand of the tensioning beam section repeats above-mentioned operational procedure, directly
It constructs and completes to the beam section adjacent with closure section beam section.
S5 joins the two sections of a bridge, etc the end bay girder and mounted transition beam section preparatory on the king-tower, to complete side
Construction across girder.
The closure of closure section can be used Hanging Basket method and construct, and also can set up hanger above closure section by Hanging Basket, adopt
It is carried out with hanger method.When using hanging frame method construction, needing to carry out setting up for hanger using Hanging Basket, hanging the specific steps of frame method construction
Are as follows:
Hanger is set up, sets up the hanger for installing closure section using the Hanging Basket；
Template is set up, sets up closure section concrete-pouring template using the hanger；
It pours, pours closure section girder；
Curing concrete and stretch-draw prestressing force steel beam, after concrete strength reaches construction requirement, tensioning closure section girder is suitable
Bridge completes closure section construction to the prestressed strand with direction across bridge.
Wherein, using hanger method carry out closing construction before, for convenient for construction, can be after setting up foot prop, by the extension
Basket is removed.The hanger method closing construction can be used for the closing construction of end bay girder between auxiliary pier, also can be used for auxiliary pier and bridge
Girder closing construction between platform also can be used for the girder closing construction between auxiliary pier and king-tower.
Embodiment two
Fig. 4 is that part A has additional the auxiliary pier of temporary anchoring structure and the enlarged drawing of pier top beam section in Fig. 2.Such as Fig. 4 institute
Show, the step of one auxiliary pier pier construction of embodiment in, further include that setting prevents main girder construction process middle girder from toppling
The step of temporary anchoring structure 12, wherein the temporary anchoring structure 12 includes: set on the support pier and the pier top beam section
Between for resist the vertical pressure from the continuous beam support construction and generated for resisting in girder casting process
Unbalanced moments antidumping structure, the antidumping structure includes the steel-pipe pile and connection institute around the support pier
State the fastening reinforcing bar of steel-pipe pile and the pier top beam section.
The temporary anchoring structure is to prevent from generating imbalance to box beam center by continuous beam unbalanced load in construction
Moment of flexure makes the risk that beam body is toppled.Temporary anchoring structure is made of steel-pipe pile, fastening reinforcing bar and temporary support, form and principle
Are as follows: auxiliary pier and the anchoring temporarily of beam body are to anchor the form combined in vitro in vivo using " soft outside but hard inside ", " soft outside " mainly
Refer to " pier side steel pipe+fastening reinforcing bar ", " interior rigid " refers mainly to the temporary support of auxiliary pier pier top；The pier top temporary support master of " interior rigid "
It is used to resist the pressure of continuous beam vertical direction；" the pier side steel pipe+fastening reinforcing bar " of " outer soft " is mainly used for resisting continuous beam
The unbalanced moment that casting process generates.When continuous beam beam body is by unbalanced load, it may appear that corresponding unbalanced moment,
The steel-pipe pile for being now in toppling direction is pressurized and generates counter-force, to form the moment of flexure for stopping beam body to be toppled, the steel of opposite side
Tubular pole also can produce the moment of flexure for stopping beam body to be toppled, the two is antidumping moment of flexure, can be used for resisting the continuous beam by pulling force
The unbalanced moment generated in beam body casting process.To prevent auxiliary pier master when cable-stayed bridge end bay girder is using cradle construction
Beam topples.
Although having been illustrated with some exemplary embodiments of the invention above, those skilled in the art will be managed
Solution, in the case where not departing from the principle of the present invention or spirit, can make a change these exemplary embodiments, of the invention
Range is defined by the claims and their equivalents.
Claims (9)
1. the construction method of cable-stayed bridge end bay girder, which is characterized in that itself the following steps are included:
The construction of cable-stayed bridge main-beam support pier stud is carried out, the support pier stud includes at least king-tower and auxiliary pier；
Pier top beam section is poured on the top of the king-tower and the top of auxiliary pier；
Hanging Basket is installed in the pier top beam section；
Using the Hanging Basket and centered on the auxiliary pier along bridge to extending end bay girder；
The end bay girder and mounted transition beam section preparatory on the king-tower are joined the two sections of a bridge, etc, to complete end bay girder
Construction.
2. construction method according to claim 1, which is characterized in that the support pier stud is equipped with for preventing girder from inclining
The temporary anchoring structure covered comprising come from the company for resisting between the support pier stud and the pier top beam section
Continue the support construction of the vertical pressure of beam and the antidumping structure for resisting the unbalanced moments generated in girder casting process,
The antidumping structure includes the steel-pipe pile and the connection steel-pipe pile and the pier top beam section around the support pier stud
Fastening reinforcing bar.
3. construction method according to claim 1, which is characterized in that after the completion of support pier stud construction, set up on its periphery
For pouring the bracket or bracket and formwork for placing of the pier top beam section.
4. construction method according to claim 1, which is characterized in that the Hanging Basket is equipped with the anchoring dress being anchored on girder
The flexible protective rope set and anchored simultaneously with Hanging Basket and the girder, for preventing the Hanging Basket from toppling.
5. construction method according to claim 1, which is characterized in that by the end bay girder on the king-tower in advance
The step of mounted transition beam section is joined the two sections of a bridge, etc, comprising the following steps:
The hanger for installing closure section is set up using the Hanging Basket；Closure section concreting mould is set up using the hanger
Plate；Pour closure section girder；After concrete strength reaches construction requirement, tensioning closure section girder along bridge to prestressed strand, it is complete
At closure section construction.
6. construction method according to claim 5, which is characterized in that the construction requirement is that concrete strength reaches 90%
Design strength and the age of concrete are not less than 7 days.
7. construction method according to claim 5, which is characterized in that it further includes described for carrying out the position of closure step
The docking location of end bay girder and the access bridge that bank is set.
8. construction method according to claim 5, which is characterized in that the position for carrying out closure step further includes being based on
Two adjacent auxiliary piers extended end bay girder docking location.
9. construction method according to claim 5, which is characterized in that set up using the Hanging Basket for installing closure section
After hanger, the Hanging Basket is removed.
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| CN201611070272.4A CN106351128B (en) | 2016-11-28 | 2016-11-28 | The construction method of cable-stayed bridge end bay girder |
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| CN201611070272.4A CN106351128B (en) | 2016-11-28 | 2016-11-28 | The construction method of cable-stayed bridge end bay girder |
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| CN106351128B true CN106351128B (en) | 2019-04-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207452739U (en) * | 2017-10-01 | 2018-06-05 | 中国路桥工程有限责任公司 | A kind of cable-stayed bridge beams of concrete mid-span closure segment pre-stress system |
| CN114293414A (en) * | 2021-12-03 | 2022-04-08 | 中铁第四勘察设计院集团有限公司 | Viaduct transition section structure and construction method thereof |
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