CN106758824A - Long span Curved Beam Bridge tension of prestressed tendon method - Google Patents
Long span Curved Beam Bridge tension of prestressed tendon method Download PDFInfo
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- CN106758824A CN106758824A CN201611042456.XA CN201611042456A CN106758824A CN 106758824 A CN106758824 A CN 106758824A CN 201611042456 A CN201611042456 A CN 201611042456A CN 106758824 A CN106758824 A CN 106758824A
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- tensioning
- prestressed
- prestressed strand
- box beam
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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
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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
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of Long span Curved Beam Bridge tension of prestressed tendon method, balanced, symmetrical tensioning is made centered on box beam beam axis；Its box beam side prestressed strand tension sequence is：The crossbeam transverse direction steel beam of pretensioning box beam, in then intersecting tensioning box beam, the web prestressed strand of side, then intersects outside prestressed strand in tensioning box beam bottom, top board, last tensioning box beam top board transverse direction steel beam.Tension of prestressed tendon is carried out using the method, beam body amount of deflection and STRESS VARIATION are more steady, and stretching process beam body will not produce crack, improve construction quality.
Description
Technical field
The present invention relates to a kind of construction method, and in particular to a kind of Long span Curved Beam Bridge tension of prestressed tendon method.
Background technology
Curved prestressing force Continuous Concrete Box Girders can be well adapted for high-grade highway, urban three-dimensional crossroad engineering and answer
Miscellaneous linear needs, while in turn ensure that the smooth-going of curvilinear structures lines, smooth, lucid and lively aesthetic, economic indicator is high, into
Important bridge type in for Modern Traffic engineering.With developing rapidly for highway and urban road, it applies increasing, span
It is increasing.
Long span curved prestressing force Continuous Concrete Box Girders, complicated with stress performance, difficulty of design and construction is larger
The features such as.Especially Curved Beam Bridge superstructure uses curve variable cross-section pre-stress concrete skew web plate continuous box-beam structure, prestressing force
Muscle arrangement arranges that the positioning in work progress is also more complicated according to bridge force-bearing form in wave.Pre-stress construction work in construction
The complexity of skill easily causes occur bad engineering problem during prestressed stretch-draw, the outside excessive shape of difference in torque such as in beam body
Toppled into box beam, stress distribution is uneven to cause concrete cracking etc., therefore the tension sequence of presstressed reinforcing steel must strictly to press
Design requirement is carried out.Lack the correlation technique optimized for Curved Beam Bridge tension of prestressed tendon order at present.
The content of the invention
It is an object of the invention to provide a kind of Long span Curved Beam Bridge tension of prestressed tendon method, carried out using the method
Tension of prestressed tendon, beam body amount of deflection and STRESS VARIATION are more steady, and stretching process beam body will not produce crack, improve construction matter
Amount.
The technical solution adopted in the present invention is：
A kind of Long span Curved Beam Bridge tension of prestressed tendon method, balanced, symmetrical tensioning is made centered on box beam beam axis；Its case
Beam side prestressed strand tension sequence is：The crossbeam transverse direction steel beam of pretensioning box beam, in then intersecting tensioning box beam, the web of side
Prestressed strand, then intersect outside prestressed strand in tensioning box beam bottom, top board, last tensioning box beam top board transverse direction steel beam.
Intersect tensioning box beam in, side web prestressed strand the step of be：First to the prestress steel of median ventral plate 1/2nd
Shu Jinhang tensioning, from the bottom up to steel interfascicular every tensioning during tensioning；Then the prestressed strand of opposite side web 1/2nd is carried out
Tensioning, is similarly interval tensioning；The prestressed strand to median ventral plate residue 1/2nd carries out tensioning again, during tensioning from the bottom up
To steel interfascicular every tensioning；The last prestressed strand of tensioning side web residue 1/2nd, during tensioning from the bottom up to steel interfascicular every
Tensioning.
It is the step of the prestressed strand of outside in intersection tensioning box beam bottom, top board：First to base plate inner side and outside two/
One presstressed reinforcing steel carries out tensioning；Then tensioning is carried out to the presstressed reinforcing steel of top board medial and lateral 1/2nd；Again to two points in the middle part of base plate
One of prestressed strand carry out tensioning；Tensioning finally is carried out to 1/2nd prestressed strands of top board middle part；Above-mentioned tensioning is
Interval tensioning；After completing above-mentioned steps, repeat same step and base plate, the prestressed strand of top board residue 1/2nd are opened
Draw（I.e.：Tensioning first is carried out to base plate inner side and the presstressed reinforcing steel of outside residue 1/2nd；Then to top board medial and lateral residue two
/ mono- presstressed reinforcing steel carries out tensioning；Tensioning is carried out to remaining 1/2nd prestressed strands in base plate middle part again；Finally to top board
The prestressed strand of middle part residue 1/2nd carries out tensioning；Above-mentioned tensioning is also interval tensioning.）.
Present invention combination finite element method, simulation curve beam bridge prestressed strand tension sequence, and according to it to song
Line beam bridge structure stressing influence, it is determined that tension of prestressed tendon order.Tensioning operation to control based on stretching force, while using tensioning
Stretch value should exceed with the deviation of theoretical calculation stretch value as foundation, actual measurement stretch value is checked within the scope of -6% to+6%
When should immediately stop tensioning, ascertain the reason and take appropriate measures after be further continued for operation.
In the present invention, before concreting, and before Long span Curved Beam Bridge tension of prestressed tendon, box beam girder across
In, the keypoint part such as bearing ess-strain monitoring section is set, pre-buried JMZX -215 high accuracy string wire strain gauge uses JMZX-
3003 strain testing instrument are tested, beam body stressing conditions during monitoring prestressed stretch-draw.
The beneficial effects of the present invention are：
Using tensioning is intersected in the middle of web steel beam with both sides, top, Bottom Board Steel beam top-bottom cross tensioning can effectively reduce Curved Beam Bridge
Support reaction is poor elevationally outward in each bridge pier, the vertical moment of torsion of reduction bridge, can prevent common rollover in existing line beam bridge,
The bad engineering accident such as topple；
This method can reduce box beam internal stress, and stretching process beam body STRESS VARIATION is more steady, can improve construction quality；
This method can also deform box beam more to smooth out, it is to avoid local distortion, improve bridge quality；
This method construction is simple, is easy to implement.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is Long span Curved Beam Bridge tension of prestressed tendon flow chart；
Fig. 2 is curved box girder web prestressed strand distribution map；
Fig. 3 is curved box girder roof and floor prestressed strand distribution map.
In figure：1st, inner edge web prestressed strand, 2, interior median ventral plate prestressed strand, 3, outer median ventral plate prestressed strand,
4th, outside web prestressed strand, 5, inside ceiling panel prestressed strand, 6, middle top board prestressed strand, 7, roof sheet prestress steel
Beam, 8, inner bottom plating prestressed strand, 9, middle baseboard prestress steel beam, 10, Outer Bottom Plating prestressed strand.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.
Referring to Fig. 1-Fig. 3, a kind of Long span Curved Beam Bridge tension of prestressed tendon method, the method combination finite element analysis side
Method, simulation curve beam bridge prestressed strand tension sequence, and Curved Beam Bridge structure stress is influenceed according to it, it is determined that prestressing force
Muscle tension sequence；It is comprised the following steps that：
Prestressed stretch-draw is carried out after the compression strength and elastic mould value of box beam concrete reach the 90% of design strength；
Cast-in-Situ Continuous Beam is two dimension prestressing system, and uses and make balanced, symmetrical tensioning centered on beam axis；Its box beam
Side prestressed strand tension sequence is：
1）, horizontal steel beam in stretch-drawing beam；
2）, median ventral plate prestressed strand 2, outer median ventral plate prestressed strand 3 in tensioning 1/2nd successively；Successively tensioning two/
One inner edge web prestressed strand 1, outside web prestressed strand 4；During tensioning from it is interior outward, be spaced tensioning from the bottom up；
3）, the median ventral plate prestressed strand 2 of tensioning residue 1/2nd, outer median ventral plate prestressed strand 3 successively；Then tensioning successively
Remaining 1/2nd inner edge web prestressed strands 1, outside web prestressed strand 4；During tensioning from it is interior outward, from the bottom up between
Every tensioning；
4）, the inner bottom plating prestressed strand 8 of tensioning 1/2nd, Outer Bottom Plating prestressed strand 10 successively, during tensioning from outward inside between
Every tensioning；The inside ceiling panel prestressed strand 5 of tensioning 1/2nd, roof sheet prestressed strand 7, are spaced inside during tensioning from outward successively
Tensioning；Baseboard prestress steel beam 9 in tensioning 1/2nd, from being spaced tensioning inside outward during tensioning；Top board in tensioning 1/2nd
Prestressed strand 6, from being spaced tensioning inside outward during tensioning；
5）, the inner bottom plating prestressed strand 8 of tensioning residue 1/2nd, Outer Bottom Plating prestressed strand 10 successively, from outer past during tensioning
Interior interval tensioning；The inside ceiling panel prestressed strand 5 of tensioning residue 1/2nd, roof sheet prestressed strand 7 successively, from outer during tensioning
Tensioning is spaced inside；Baseboard prestress steel beam 9 in tensioning residue 1/2nd, from being spaced tensioning inside outward during tensioning；Tensioning is remained
Top board prestressed strand 6 in 1/2nd is remaininged, from being spaced tensioning inside outward during tensioning；
6）, tensioning box beam top board transverse direction steel beam.
Prestressed strand is anchored after control stress for prestressing reaches stabilization, its anchorage end-blocking concrete protective, after anchoring
Prestressed strand protruded length cannot be less than 30mm, unnecessary prestressed strand is cut off with disc cutter.
In the present invention, prestressed strand stressing sequence is：0 → initial stress（10%σcon）→（20%σcon）→σcon
（Anchored after holding lotus 2min）；σ con are maximum prestress.
In the present invention, prestressed strand tensioning using stretching force and elongation dual control, to control based on stretching force, to work as tensioning
When power reaches control stretching force, actual elongation should be in the range of-the 6% of theoretic explication~+6%.During prestressed strand tensioning
Stripped thread, fracture of wire phenomenon should be avoided the occurrence of, it is ensured that the wire broken rate on same section cannot be greater than 1%, and limit per beam steel strand
Line fracture of wire, stripped thread must not exceed one, forbid whole stock steel strand wires to break.Anchor circle mouth is counted during all prestressed strand tensioning to rub
Resistance loss.
Present invention is particularly suitable for the complexity of safety factor present in city expressway, stereo urban traffic, line style requirement
Prestressed concrete curved box girder bridge higher.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (3)
1. a kind of Long span Curved Beam Bridge tension of prestressed tendon method, it is characterised in that：Balanced centered on box beam beam axis
Symmetrical tensioning；Its box beam side prestressed strand tension sequence is：The crossbeam transverse direction steel beam of pretensioning box beam, then intersects tensioning
In box beam, side web prestressed strand, then intersect outside prestressed strand, last tensioning box beam top in tensioning box beam bottom, top board
Plate transverse direction steel beam.
2. Long span Curved Beam Bridge tension of prestressed tendon method according to claim 1, it is characterised in that：Intersect tensioning case
The step of Liang Zhong, side web prestressed strand is：First the prestressed strand to median ventral plate 1/2nd carries out tensioning, during tensioning from
Under up to steel interfascicular every tensioning；Then the prestressed strand of opposite side web 1/2nd carries out tensioning, is similarly interval tensioning；
The prestressed strand to median ventral plate residue 1/2nd carries out tensioning again, from the bottom up to steel interfascicular every tensioning during tensioning；Finally
The prestressed strand of tensioning side web residue 1/2nd, from the bottom up to steel interfascicular every tensioning during tensioning.
3. Long span Curved Beam Bridge tension of prestressed tendon method according to claim 1 and 2, it is characterised in that：Intersect and open
It is the step of the prestressed strand of outside in drawing box beam bottom, top board：First base plate inner side and the presstressed reinforcing steel of outside 1/2nd are carried out
Tensioning；Then tensioning is carried out to the presstressed reinforcing steel of top board medial and lateral 1/2nd；Again to 1/2nd prestressed strands of base plate middle part
Carry out tensioning；Tensioning finally is carried out to 1/2nd prestressed strands of top board middle part；Above-mentioned tensioning is interval tensioning；In completion
After stating step, repeat same step carries out tensioning to base plate, the prestressed strand of top board residue 1/2nd.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611042456.XA CN106758824B (en) | 2016-11-21 | 2016-11-21 | Long span Curved Beam Bridge tension of prestressed tendon method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611042456.XA CN106758824B (en) | 2016-11-21 | 2016-11-21 | Long span Curved Beam Bridge tension of prestressed tendon method |
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| CN106758824A true CN106758824A (en) | 2017-05-31 |
| CN106758824B CN106758824B (en) | 2018-08-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542272A (en) * | 2017-09-25 | 2018-01-05 | 沈阳工业大学 | Novel portable prestressed draw-bar tensioning equipment |
| CN109537429A (en) * | 2018-11-16 | 2019-03-29 | 中铁大桥勘测设计院集团有限公司 | A kind of design method of Curved Beam Bridge skew web plate prestressed strand |
| CN110206143A (en) * | 2019-05-10 | 2019-09-06 | 中建八局第二建设有限公司 | A kind of construction method of post-stressed assembly concrete frame structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264533A (en) * | 2004-03-18 | 2005-09-29 | Taisei Corp | Prestressed concrete box girder incremental launching erection method |
| CN102011366A (en) * | 2009-12-29 | 2011-04-13 | 中交第一航务工程局有限公司 | Construction method for mud jacking of post-tensioning pre-stressed concrete box girder pipe |
| CN102086701A (en) * | 2010-12-23 | 2011-06-08 | 葛洲坝集团第一工程有限公司 | Prestressed tensioning construction method |
| CN103437285A (en) * | 2013-07-05 | 2013-12-11 | 中交二公局第一工程有限公司 | Full framing cast-in-situ box girder construction process |
| CN105421235A (en) * | 2015-10-22 | 2016-03-23 | 王壹帆 | Lateral prestress application method for paving reinforcing bar concrete on bridge floor of assembled type bridge |
-
2016
- 2016-11-21 CN CN201611042456.XA patent/CN106758824B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264533A (en) * | 2004-03-18 | 2005-09-29 | Taisei Corp | Prestressed concrete box girder incremental launching erection method |
| CN102011366A (en) * | 2009-12-29 | 2011-04-13 | 中交第一航务工程局有限公司 | Construction method for mud jacking of post-tensioning pre-stressed concrete box girder pipe |
| CN102086701A (en) * | 2010-12-23 | 2011-06-08 | 葛洲坝集团第一工程有限公司 | Prestressed tensioning construction method |
| CN103437285A (en) * | 2013-07-05 | 2013-12-11 | 中交二公局第一工程有限公司 | Full framing cast-in-situ box girder construction process |
| CN105421235A (en) * | 2015-10-22 | 2016-03-23 | 王壹帆 | Lateral prestress application method for paving reinforcing bar concrete on bridge floor of assembled type bridge |
Non-Patent Citations (1)
| Title |
|---|
| 痴男1678: "《百度文库》", 13 April 2011 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542272A (en) * | 2017-09-25 | 2018-01-05 | 沈阳工业大学 | Novel portable prestressed draw-bar tensioning equipment |
| CN107542272B (en) * | 2017-09-25 | 2023-09-22 | 沈阳工业大学 | Novel portable prestressed pull rod tensioning device |
| CN109537429A (en) * | 2018-11-16 | 2019-03-29 | 中铁大桥勘测设计院集团有限公司 | A kind of design method of Curved Beam Bridge skew web plate prestressed strand |
| CN110206143A (en) * | 2019-05-10 | 2019-09-06 | 中建八局第二建设有限公司 | A kind of construction method of post-stressed assembly concrete frame structure |
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| CN106758824B (en) | 2018-08-07 |
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Granted publication date: 20180807 Termination date: 20181121 |