CN207672411U - A kind of widening structure of width cantilever boxgirder - Google Patents
A kind of widening structure of width cantilever boxgirder Download PDFInfo
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- CN207672411U CN207672411U CN201721828860.XU CN201721828860U CN207672411U CN 207672411 U CN207672411 U CN 207672411U CN 201721828860 U CN201721828860 U CN 201721828860U CN 207672411 U CN207672411 U CN 207672411U
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Abstract
The utility model is specially a kind of widening structure of wide cantilever boxgirder, solves the problems, such as that there are complex process, cost height, and coupling stiffness differences big to original structure damage to cause later period maintenance inconvenient when existing wide cantilever boxgirder is widened.Beam bottom steel plate upper surface is provided with longitudinal stiffened steel plates and connection reinforcing bar, vertical anchor bolt is provided at left and right sides of longitudinal stiffened steel plates, former box beam and the adjacent web inside for widening box beam are both provided with lateral anchor bolt, former box beam side adjacent with box beam is widened is provided with bottom plate implantation reinforcing bar and bottom plate reserved steel bar, and concrete floor in-situ layer is provided on beam bottom steel plate；Former box beam top plate is provided with roof steel bar and top reinforcement recklessly and top plate reserved steel bar and top plate bottom reserved steel bar, former box beam and widens construction of cast-in-place box girders layer and is provided with in-situ layer reinforcing bar and in-situ layer reserved steel bar.The utility model improves the security performance of structure, while ensure that the durability of original structure, has the advantages that construction cost is low, short construction period.
Description
Technical field
The utility model is related to highway bridge and culvert engineerings with technology is widened, specially a kind of widening structure of wide cantilever boxgirder.
Background technology
Current China new highway has reached unprecedented scale, and reconstruction and extension project will be increasingly becoming run in the future in
One big emphasis of highway construction.And in highway reconstruction and expansion engineering, one of crucial technical problem is changed to having widening for bridge
It makes.Different from general bridge design, bridge widening improvement and design must take into consideration construction stage and service stage new and old contignation
Influence each other, need use rational construction measure and suitable construction method, minimize the damage to original structure, to
Safety, durability and the applicability of axle casing are widened in guarantee.
It is more prominent to widen transform measure for wide cantilever boxgirder structure, it is general only by girder in conventional design method
Flange plate has carried out lateral connection, new and old structure lateral connection poor rigidity, and structure can not overcome the amount of deflection between new and old box beam poor,
Unavoidably there is cracking of mating formation in seam crossing in long-term operation, security risk is brought for later period maintenance.And other are used
In the lateral connection design for planting reinforcing bar technology, construction technology is complicated, and step is various, and project cost is high, and is damaged to original structure
It is larger.
Invention content
The utility model in order to solve when existing wide cantilever boxgirder is widened there are complex process, cost is high, is damaged to original structure
Hinder the problem that big and coupling stiffness difference causes later period maintenance inconvenience, provides a kind of widening structure of wide cantilever boxgirder.
The utility model adopts the following technical scheme that realization：A kind of widening structure of width cantilever boxgirder, including setting
Former box beam with widen box beam between and both be close to the beam bottom steel plate of bottom plate lower face, beam bottom steel plate upper surface is provided with several
Longitudinal stiffened steel plates of distribution are controlled, the connection reinforcing bar being distributed before and after several, steel of longitudinally putting more energy into are installed in longitudinal stiffened steel plates
Be provided at left and right sides of plate and former box beam and widen the fixed vertical anchor bolt of box beam bottom plate, former box beam with widen the adjacent of box beam
Be both provided on the inside of web with the fixed lateral anchor bolt of left and right ends longitudinal direction stiffened steel plates, be provided on the right side of the bottom plate of former box beam with
It connects the fixed bottom plate of reinforcing bar and is implanted into reinforcing bar, widen on the left of the bottom plate of box beam and be provided with and connect the reserved steel of the fixed bottom plate of reinforcing bar
Muscle is provided with concrete floor in-situ layer on beam bottom steel plate；Roof steel bar and top plate bottom steel are provided on the right side of former box beam top plate
Muscle is widened and is provided with the top plate reserved steel bar being connect with roof steel bar and the top with top plate bottom bar connecting on the left of box beam top plate
Board bottom reserved steel bar is provided with in-situ layer reinforcing bar on the left of former construction of cast-in-place box girders layer, widen on the left of construction of cast-in-place box girders layer be provided with
The in-situ layer reserved steel bar of in-situ layer bar connecting.
The structure design is strong using concrete anti-compression and steel plate bending resistance, deforms the good feature of adaptability, using beam bottom
Steel plate makes to form new steel reinforced concrete combined box beam between new and old box beam, improves overall stiffness and torsional property between new and old box beam,
So that disease at operation stage new and old briage joint seam is greatly reduced, and increase the bending resistance of widening structure, simultaneously because not adopting
With large area tendon-planted craft, therefore the damage to original structure is minimized, has overcome existing wide cantilever boxgirder and widen
When there is a problem of that complex process, cost be high, and coupling stiffness difference big to original structure damage causes later period maintenance inconvenient.
It is reliable that the structure design of the utility model is reasonable, and the overall stiffness and resistance to torsion between new and old box beam greatly improved
Can, so that the disease of operation stage is greatly reduced, increase the comfort of driving, and increase the bending bearing capacity of structure, carries
The high security performance of structure, while the damage to original structure is reduced, it ensure that the durability of original structure, have and build
The advantages of expense is low, short construction period.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
In figure：1- original box beams, 2- widen box beam, 3- beam bottom steel plates, the longitudinal directions 4- stiffened steel plates, 5- connection reinforcing bars, and 6- is vertical
Anchor bolt, 7- transverse direction anchor bolts, 8- bottom plates implantation reinforcing bar, 9- concrete floor in-situ layers, 10- roof steel bars, 11- push up reinforcement,
12- in-situ layer reinforcing bars, 13- bottom plate reserved steel bars, 14- top plate reserved steel bars, 15- top plates bottom reserved steel bar, 16- in-situ layers are reserved
Reinforcing bar.
Specific implementation mode
A kind of widening structure of width cantilever boxgirder, including setting former box beam 1 with widen box beam 2 between and both be close to bottom
The beam bottom steel plate 3 of plate lower face, 3 upper surface of beam bottom steel plate are provided with longitudinal stiffened steel plates 4 of several left and right distributions, longitudinally put more energy into
Be installed with the connection reinforcing bar 5 being distributed before and after several in steel plate 4, the left and right sides of longitudinal stiffened steel plates 4 be provided with former box beam 1 and
Widen the fixed vertical anchor bolt 6 of 2 bottom plate of box beam, former box beam 1 and the adjacent web inside for widening box beam 2 are both provided with and left and right two
The fixed lateral anchor bolt 7 of the longitudinal stiffened steel plates 4 in end, the bottom plate right side of former box beam 1 are provided with and connect 5 fixed bottom plate of reinforcing bar and plant
Enter reinforcing bar 8, widens on the left of the bottom plate of box beam 2 and be provided with and connect 5 fixed bottom plate reserved steel bar 13 of reinforcing bar, on beam bottom steel plate 3
It is provided with concrete floor in-situ layer 9；It is provided with roof steel bar 10 and top reinforcement 11 on the right side of 1 top plate of former box beam, widens
The top for being provided with the top plate reserved steel bar 14 being connect with roof steel bar 10 on the left of 2 top plate of box beam and being connect with top reinforcement 11
Board bottom reserved steel bar 15 is provided with in-situ layer reinforcing bar 12 on the left of 1 in-situ layer of former box beam, widens on the left of 2 in-situ layer of box beam and set
It is equipped with the in-situ layer reserved steel bar 16 being connect with in-situ layer reinforcing bar 12.
When carrying out bridge widening operation, former box beam 1 bottom plate and widen and be implanted into lateral anchor bolt 7, vertical anchor on coxostermum
Bolt 6 and bottom plate are implanted into reinforcing bar 8, then by beam bottom steel plate 3 and be through after the lifting in place of connection reinforcing bar 5 thereon with former box beam 1 into
Beam bottom steel plate 3 and the connection reinforcing bar 5 being through thereon are then carried out anchor connection after-pouring by row anchor connection with box beam 2 is widened
Concrete forms entirety；B, it is extremely identical as the top flange thickness of 2 top plate of cast-in-situ box girder that 1 top plate flange portions of former box beam are cut
When, by former box beam 1 and the roof steel bar 10 widened in 2 top plate of box beam and top plate reserved steel bar 14 and push up reinforcement and top plate bottom
Reserved steel bar 15 is welded to connect, and concrete roof is then poured；C, the in-situ layer at 1 cantilever of former box beam is cut, and is utilized
After in-situ layer reinforcing bar 12 and in-situ layer reserved steel bar 16 are welded, former box beam Bridge 1 face in-situ layer is poured, completes wide cantilever boxgirder
Widen operation.
Claims (1)
1. a kind of widening structure of width cantilever boxgirder, it is characterised in that：Including being arranged in former box beam（1）With widen box beam（2）It
Between and both be close to the beam bottom steel plate of bottom plate lower face（3）, beam bottom steel plate（3）Upper surface is provided with the longitudinal direction of several left and right distributions
Stiffened steel plates（4）, longitudinal stiffened steel plates（4）Inside it is installed with the connection reinforcing bar being distributed before and after several（5）, longitudinal stiffened steel plates（4）
The left and right sides be provided with and former box beam（1）With widen box beam（2）The fixed vertical anchor bolt of bottom plate（6）, former box beam（1）With widen
Box beam（2）Adjacent web on the inside of be both provided with and left and right ends longitudinal direction stiffened steel plates（4）Fixed transverse direction anchor bolt（7）, former case
Beam（1）Bottom plate on the right side of be provided with and connect reinforcing bar（5）Fixed bottom plate is implanted into reinforcing bar（8）, widen box beam（2）Bottom plate on the left of
It is provided with and connect reinforcing bar（5）Fixed bottom plate reserved steel bar（13）, beam bottom steel plate（3）On be provided with concrete floor in-situ layer
（9）；Former box beam（1）Roof steel bar is provided on the right side of top plate（10）With top reinforcement（11）, widen box beam（2）A left side for top plate
Side is provided with and roof steel bar（10）The top plate reserved steel bar of connection（14）With with top reinforcement（11）The top plate bottom of connection is pre-
Stay reinforcing bar（15）, former box beam（1）In-situ layer reinforcing bar is provided on the left of in-situ layer（12）, widen box beam（2）The left side of in-situ layer
It is provided with and in-situ layer reinforcing bar（12）The in-situ layer reserved steel bar of connection（16）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721828860.XU CN207672411U (en) | 2017-12-25 | 2017-12-25 | A kind of widening structure of width cantilever boxgirder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721828860.XU CN207672411U (en) | 2017-12-25 | 2017-12-25 | A kind of widening structure of width cantilever boxgirder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207672411U true CN207672411U (en) | 2018-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721828860.XU Active CN207672411U (en) | 2017-12-25 | 2017-12-25 | A kind of widening structure of width cantilever boxgirder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916625A (en) * | 2017-12-25 | 2018-04-17 | 山西省交通规划勘察设计院 | A kind of widening structure and its method of width cantilever boxgirder |
| CN110485314A (en) * | 2019-08-26 | 2019-11-22 | 山东交通学院 | Highway T beam spells wide structure and method under a kind of operation state |
| CN111441263A (en) * | 2020-04-10 | 2020-07-24 | 广东精特建设工程有限公司 | Construction method for widening rigid connection of new and old bridges for keeping traffic passing |
-
2017
- 2017-12-25 CN CN201721828860.XU patent/CN207672411U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916625A (en) * | 2017-12-25 | 2018-04-17 | 山西省交通规划勘察设计院 | A kind of widening structure and its method of width cantilever boxgirder |
| CN110485314A (en) * | 2019-08-26 | 2019-11-22 | 山东交通学院 | Highway T beam spells wide structure and method under a kind of operation state |
| CN111441263A (en) * | 2020-04-10 | 2020-07-24 | 广东精特建设工程有限公司 | Construction method for widening rigid connection of new and old bridges for keeping traffic passing |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 030032 Shanxi Transportation Science and Technology Park, 27 Wuluo Street, Xiaodian District, Taiyuan City, Shanxi Province Patentee after: Shanxi Transportation Planning Survey and Design Institute Co., Ltd. Address before: 030012 No. 69 Bianzhou South Road, Taiyuan City, Shanxi Province Patentee before: Shanxi Traffic Planning Survey Design Institute |