CN110485314A - Highway T beam spells wide structure and method under a kind of operation state - Google Patents
Highway T beam spells wide structure and method under a kind of operation state Download PDFInfo
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- CN110485314A CN110485314A CN201910791190.6A CN201910791190A CN110485314A CN 110485314 A CN110485314 A CN 110485314A CN 201910791190 A CN201910791190 A CN 201910791190A CN 110485314 A CN110485314 A CN 110485314A
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses highway T beams under a kind of operation state to spell wide structure and method, it solves the problems, such as that the wide method of the spelling of prior art Bridge is relatively difficult to guarantee the globality of new and old bridge, with significantly improve old T-type beam and new T-type beam lateral ties, ensure construction quality beneficial effect, its scheme is as follows: highway T beam spells wide structure, the new T-type beam including being set to old T-type beam side under a kind of operation state；First connection member, the first connection member connect old T-type beam flange plate and new T-type beam flange plate；Second connection member connects the first reinforcing bar of prestressing force between old T-type web and new T-type web, and the second steel mesh between the first reinforcing bar including many places, has poured the second concrete between the third steel mesh that the first reinforcing bar and the second steel mesh are constituted.
Description
Technical field
The present invention relates to bridge structure design fields, spell wide knot more particularly to highway T beam under a kind of operation state
Structure and method.
Background technique
Recently as China's rapid development of economy, country has carried out greatly to by the infrastructure of representative of means of transportation
Amount investment, while achieving significant progress.But also swashing along with population and vehicle flowrate while rapid economic development
Increase, this proposes increasingly higher demands and challenge to the existing traffic infrastructure in China.In this context, to meet day
The demand for the volume of traffic that benefit increases, and land resource is saved, by carrying out reorganization and expansion rationally using existing to built highway
The method of the traffic capacity of highway and the existing transportation network of raising has been put on schedule.It is in highway reconstruction and expansion to pass that bridge, which spells width,
Important link is by former bridge deck widening or by increasing original driving in original bridge one or both sides newly building bridge
It is the emphasis of entire highway reconstruction and expansion engineering that road quantity, which improves traffic ability to meet traffic needs,.
It is spelled in wide work in existing bridge, there are problems that following aspect:
1) current construction is commonly spelled wide method and had: new and old bridge superstructure and substructure be not connected to, new and old bridge
Superstructure is all connected with substructure and connects with new and old bridge superstructure, and substructure is not connected to；Practice of construction generallys use
New and old bridge superstructure connection, the unconnected method of substructure, since new and old bridge only connects superstructure, substructure is complete
Complete independent, then the globality of new and old bridge is relatively difficult to guarantee, and the globality for how guaranteeing to widen rear structure is in reconstruction and extension project
Difficult point and emphasis.
2) old bridge is in normal operation state when constructing, and the unobstructed difficulty of traffic is larger, also will increase dramatically appearance safety
The hidden danger of accident, this proposes higher requirement to the working efficiency of construction technology, safety operation.
3) method for dismounting of existing beams of concrete affiliated facility mainly has control blasting procedure, chemical blasting procedure, artificial wind
Pick abolishes method；The method for mostly using artificial pneumatic pick to cut greatly the forcible entry of the old flange plate of anticollision barrier and part.Remove anticollision
Guardrail, the broken concrete cut abandon accumulation everywhere, can not utilize again, and are greatly to destroy for ecological environment；
The old flange plate in part is removed, is dismantled using artificial pneumatic pick, is more serious for concrete reinforcing steel destruction, and dismantle
Interface is irregular, this is enough to illustrate that traditional artificial pneumatic pick abolishes method, expends a large amount of manpower and material resources, and the repetition to guardrail
Utilization rate is lower.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides highway T beams under a kind of operation state to spell wide structure,
The lateral ties of old T-type beam and new T-type beam can be significantly improved, there is between two bridge blocks good globality after guarantee spelling is wide,
Ensure construction quality.
Under a kind of operation state highway T beam spell wide structure concrete scheme it is as follows:
Highway T beam spells wide structure under a kind of operation state, comprising:
New T-type beam set on old T-type beam side；
First connection member, the first connection member connect old T-type beam flange plate and new T-type beam flange plate；
Second connection member connects the first steel of prestressing force between old T-type web and new T-type web including many places
It is poured between the third steel mesh that muscle, and the second steel mesh between the first reinforcing bar, the first reinforcing bar and the second steel mesh are constituted
The second concrete is built.
Above-mentioned spelling width structure, the first connection member connect the first reinforcing bar and effectively connect the upper of old T-type Liang Yuxin T-type beam
Portion's structure is connected the substructure of old T-type beam and new T-type beam by the second connection member, and the first reinforcing bar is deformed bar,
The lateral ties between old T-type beam and new T-type beam can be significantly improved in this way, guarantee to spell after two wide bridge blocks complete by good
Globality improves the quality of construction.
Further, first connection member includes connecting old T-type beam flange plate (reinforcing bar in flange plate) and new T-type
First steel mesh of beam flange plate (reinforcing bar in flange plate), the first steel mesh have poured the first concrete, and the first concrete is to mend
Shrinkage concrete is repaid, the first steel mesh includes lateral, longitudinal and slanting reinforcing bar interconnected, and the first steel mesh effectively connects
Old T-type beam flange plate and new T-type beam flange plate guarantee the reliability that old T-type beam is connected with new T-type beam flange plate.
Further, first steel mesh includes lateral, longitudinal and slanting reinforcing bar interconnected.
Further, wide side is new, the distance between old T-type beam is variant due to spelling, in order to support and wedging is to prevent
The first reinforced bar stretching of transverse prestress generates beam body deformation, and the connection member further includes being set to old T-type web and new T
Channel steel between type web.
Further, the channel steel is equipped with many places between old T-type web and new T-type web, and many places channel steel is set to
Four sides of one cuboid, i.e. channel steel being symmetrical arranged up and down in the second connection member, to avoid new, old T-type
Beam deformation, length direction, that is, cuboid side direction of channel steel is along the level between old T-type web and new T-type web
Distance setting.
Further, the channel steel is telescopic channel steel, makes up the first reinforcing bar by the length of fine tuning channel steel in this way and exists
Apply the difference generated during prestressing force, removes channel steel, the both ends setting steel plate cushion block of channel steel and the old T-type for convenience
Web is contacted with new T-type web.
Further, for the prestressing force to the first reinforced bar stretching to setting, one end of first reinforcing bar passes through described
Old T-type web setting, the other end passes through the new T-type web setting, and the both ends of the first reinforcing bar are respectively provided with anchorage cushion block
And bolt, anchorage cushion block are set on the inside of bolt, are effectively anchored by anchorage cushion block and bolt to the both ends of the first reinforcing bar；
The two rows of settings of the first reinforcing bar of many places point, two, which ranked first reinforcing bar, is respectively arranged on the old T-type web and the new T-type soffit of girder
The upper side and lower side of plate.
Further, the material of second concrete is identical as the edge of a wing plate material of old T-type beam, new T-type beam, and second
Concrete is similarly expansive concrete.
For overcome the deficiencies in the prior art, the present invention also provides highway T beams under a kind of operation state to spell width side
Method, including following content:
New T-type beam is set up respectively in the two sides of old T-type beam, and the sedimentation period of setting time is given to new T-type beam；
The first reinforcing bar is set between old T-type web and new T-type web；
The web that channel steel is used to support simultaneously new, the old T-type beam of wedging is set between old T-type web and new T-type web；
It is implanted into the second steel mesh between the first reinforcing bar, forms third steel mesh；
Transverse prestress, the first reinforcing bar of stretch-draw anchor are applied to the first reinforcing bar；
The first steel mesh is set between old T-type beam flange plate and new T-type beam flange plate；
Concreting is carried out to the first steel mesh and third steel mesh respectively, after the completion of pouring, removes channel steel.
Further, in order to protect environment, social resources are reused, the two sides in old T-type beam set up new T respectively
Type beam, and after the completion of giving the sedimentation period of setting time to new T-type beam, the anticollision barrier of old T-type beam is cut, cement is cut into
Water horse is simultaneously lifted；And the concrete of the flange plate of old T-type beam is abolished.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention connects the top that the first reinforcing bar effectively connects old T-type Liang Yuxin T-type beam by the first connection member
Structure is connected the substructure of old T-type beam and new T-type beam by the second connection member, and the first reinforcing bar is deformed bar, this
Sample can significantly improve the lateral ties between old T-type beam and new T-type beam, guarantee to spell after two wide bridge blocks complete by good whole
Body improves the quality of construction.
2) present invention be cast between old T-type web and new T-type web by expansive concrete, and pour in
Between old T-type beam flange plate and new T-type beam flange plate, it is improved the early stage tensile strength of concrete, has prevented and mitigates significantly
The shrinkage cracking of concrete achievees the purpose that cracking resistance, antiseepage.
3) present invention can effectively support the web of simultaneously new, the old T-type beam of wedging by the setting of channel steel, new, old to prevent
The beam body deformation that T-type beam is generated in the first reinforced bar stretching of transverse prestress.
4) present invention assumes new T-type beam in the two sides of old T-type beam respectively, ensure that the geometry linear of original road, route
Center line does not adjust；The facilities such as median strip and its draining, communication pipe, inside anticollision barrier can make full use of, new old bridge
Cross section energy efficient combination, road camber rule；The adjustment of intercommunication Ramp Alignment is smaller, mutually cope with existing normal operational regime influence compared with
It is small, guarantee the unobstructed operation of traffic.
5) present invention providing by whole construction process, can simplify construction, construction quality is protected, construction speed
Fastly, construction cost is reduced, while reducing environmental pollution, is contributed to environmental protection.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is that high speed of embodiment of the present invention highway T beam spells old T-type Liang Yuxin T-type beam assembly cross-section diagram in wide structure；
Fig. 2 is that high speed of embodiment of the present invention highway T beam spells steel-bar arrangement schematic cross-sectional view in wide structure；
Fig. 3 is that high speed of embodiment of the present invention highway T beam spells wide structure section figure；
Fig. 4 is that high speed of embodiment of the present invention highway T beam spells wide structure schematic longitudinal section；
In figure: the old T-type beam of 1-, the new T-type beam of 2-, the high-strength fining twisted steel of 3-, the first steel mesh of 4-, the scalable U-steel of 5-
Plate, 6- anchorage cushion block, 7- high-strength bolt, the first concrete of 8-, 9- operation platform, 10- third steel mesh, the second concrete of 11-.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, the deficiencies in the prior art, in order to solve technical problem as above, this hair
It is bright propose highway T beam under a kind of operation state and spell wide structure the present invention is done further with reference to the accompanying drawings of the specification
Elaboration.
In a kind of typical embodiment of the invention, as shown in Figure 1-Figure 3, highway T beam under a kind of operation state
Wide structure is spelled, new T-type beam 2, the first connection member and the second connection member including being set to old 1 two sides of T-type beam, first connects
Binding component is set between old 1 flange plate of T-type beam and new 2 flange plate of T-type beam, and new T-type beam 2 is to widen bridge close to the wide side of spelling
Side bar is arranged the first steel mesh (regular reinforcement net) between old T-type beam 1 and the flange plate of new T-type beam 2, realizes connection, and pour
The first concrete eight is shunk in UEA compensation, forms the first connection member；It is laterally set between old T-type beam 1 and the web of new T-type beam 2
A plurality of the first reinforcing bar of prestressing force is set, the two rows of settings of the first reinforcing bar of many places point, the first reinforcing bar is high-strength finish rolling deformed bar 3, tensioning
Playing the role of enhancing lateral ties afterwards, high-strength bolt 7, anchorage cushion block 6 are used to anchor the high-strength finish rolling deformed bar 3 of tensioning,
There is fixed high-strength finish rolling deformed bar to keep prestressed effect, (regular reinforcement is constituted laterally longitudinal by the second steel mesh
Steel mesh) arrangement that carries out vertical direction, third steel mesh 10 is constituted with high-strength finish rolling deformed bar 3, in the second steel mesh
Reinforcing bar is connect with the first reinforcing bar, is poured UEA compensation to third steel mesh and is shunk the second concrete 11, forms the second connection knot in this way
Component.
Scalable groove profile steel plate 5 is between new, old T-type web, and channel steel is in old 1 web of T-type beam and new 2 abdomen of T-type beam
Many places are equipped between plate, many places channel steel is set to four sides of a cuboid, i.e., channel steel is above and below the second connection member
It is symmetrical set, to avoid new, old T-type beam deformation, length direction, that is, cuboid side direction of channel steel is along old T-type beam
Horizontal distance setting between web and new T-type web, channel steel are played a supporting role, and prevent beam body from deforming.
Wherein, it should be noted that old T-type beam 1 is the end bay girder of original bridging toughening guardrail and edge of a wing board concrete,
The high settings such as old T-type beam 1 and new T-type beam 2.
The first steel mesh in first connection member is set between old T-type beam 1 and the reinforcing bar of new 2 flange plate of T-type beam,
The reinforcing bar of first steel mesh and flange plate uses single-sided welding.
A plurality of and a plurality of arranged in parallel, high-strength finish rolling deformed bar is equipped in prestressed high-strength finish rolling deformed bar 3
3 length is greater than the distance between new, old T-type web, as shown in figure 4, both ends are carried out by anchorage cushion block 6 and high-strength bolt 7
Anchoring tensioning respectively.
High-strength 3 layout rules of finish rolling deformed bar: it is detected in old T-type beam 1 and new T-type beam 2 with lossless reinforcing bar Detection Techniques
The exact position of prestress wire in web, and prestress steel twist line position is marked with mark table, it is subject to and avoids steel strand wires,
In the present embodiment, high-strength finish rolling deformed bar 3 arranges that two rows, the spacing of the high-strength finish rolling deformed bar 3 of two rows keep most wide,
Upper row will be disposed adjacent to as far as possible at the top of new, old T-type web, and lower row sets close to lower edge, old T-type beam 1 with new T-type beam 2 respectively
Duct is set, is penetrated for high-strength finish rolling deformed bar 3.
In addition, scalable groove profile steel plate 5 is the channel steel that length can fine-tune 0.5cm.
High-strength bolt 7, anchorage cushion block 6 are the high-strength finish rolling deformed bar after anchoring tensioning, high-strength fining twisted steel
Muscle 3 is able to maintain the prestress value of setting.
Embodiment 2
Highway T beam spells wide method, including following content under a kind of operation state:
Step 1: widening after the completion of the whole erections of new T-type beam 2 of bridge, give the sedimentation period not less than 3 months, and implement
Sandbag piling prepressing makes to widen bridge foundation sedimentation acceleration, and tends towards stability；
Step 2: after the anticollision barrier corresponding position of old T-type beam 1 is punched, diamond-wire saw being installed, and be arranged
Directive wheel, wire rope handling saw；It is vertically cut, carries out horizontal resection after adjustment rope saw；Guardrail is cut into the specification cement of 1.2m
Water horse, lifts whole entrucking outward transport, and recycling has preferable economical, societal benefits；
Step 3: dismounting operation is carried out using flange plate of the high-pressure water jet technique to old T-type beam 1, in the construction process,
It can effectively, accurately abolish the concrete of flange plate, but not damage the reinforcing bar in flange plate, short construction period and abolish effect
Fruit is ideal；
Step 4: the essence of prestress wire in old T-type beam 1 and new 2 web of T-type beam is detected with lossless reinforcing bar Detection Techniques
True physical location, and prestress steel twist line position is marked with mark table.Wide construction is spelled in old 1 abdomen of T-type beam to each according to drawing
The corresponding position of plate and new 2 web of T-type beam carries out drilling operation；Corresponding duct penetrates high-strength finish rolling deformed bar 3；
Step 5: wide side is new, the distance between old T-type beam is variant due to spelling, in order to support and wedging is to prevent transverse direction
Prestressed stretch-draw generates beam body deformation, and scalable groove profile steel plate 5 is arranged between old 1 web of T-type beam and new 2 web of T-type beam, can
The scalable direction of telescopic chute shape steel plate 5 is arranged along the distance between new, old T-type web direction, and use is scalable
The length that groove profile steel plate 5 finely tunes channel steel makes up the difference of generation, and steel plate cushion block, per pass diaphragm plate two sides are arranged at channel steel both ends
Each setting twice channel steel, totally 4；
Step 6: in the vertical direction with high-strength finish rolling deformed bar 3, planting the second steel mesh (regular reinforcement net), form the
Three steel meshes after being drilled bar planting hole, brush the dust on hole wall, the dregs in hole are cleaned out；Bar planting is using modification
Epoxies structure glue carries out in strict accordance with operation instruction with glue, meets the anti-fatigue performance and high temperature resistance of phase；Bar planting hole reaches
To after requirement, slow injecting glue prevents from for excessive air being pressed in hole；After injecting glue, pressure is applied to reinforcing bar, reinforcing bar is allowed to plant to design
Depth overflows glue a little, to guarantee that injecting glue is full；The anchoring adhesive that cleaning is overflowed in time guarantees that the glue of reinforcing bar surrounding is uniformly satisfied
Full, the glue of spilling has to clean out, the Bonding quality of the interface between grain and liner being poured between the second concrete and former concrete after guarantee；
Step 7: after the completion of widening bridge piling prepressing, the first reinforcing bar of stretch-draw prestressing force, high-strength finish rolling deformed bar 3
It is anchored at the web of new T-type beam 1, it is high-strength using handheld-type intelligent digital display stretch-draw jack stretch-draw prestressing force in the other end
Finish rolling deformed bar is anchored when being stretched to setting prestressing force using anchorage cushion block 6 and high-strength bolt 7.It should be noted that
It is: while Multi-stage prestress, to ensure the whole stress of joggle beam；
The first reinforced bar stretching of prestressing force, which should be noted that, carries out " dual control " by stress and stretch value.Control when prestressed stretch-draw
Stress processed, actual elongation value when should be with tensioning are checked with theoretical calculation stretch value.Actual elongation value and theoretic elongation
Difference should control within 6%, otherwise should suspend tensioning, investigate thoroughly reason and take measures after being subject to adjustment, be further continued for being opened
It draws.
(1) show that control stress for prestressing calculation formula is as follows according to laboratory and live repetition test:
σcon=0.4fpk
σ in formulacon--- control stress for prestressing；
fpk--- the tensile strength standard value of selected high-strength finish rolling deformed bar；
(2) high-strength fining twisted steel is obtained according to " highway bridge and culvert construction technique normalizing " (JTG T F50-2011) following formula
3 theoretic elongation Δ L of muscleLFormula are as follows:
△LL=(Pp×L)/(Ap×Ep)
PpThe average stretching force (N) of presstressed reinforcing steel, straight line muscle press PP=P is calculated；
The length (mm) of L- presstressed reinforcing steel；
APPresstressed reinforcing steel area of section (mm2)；
EPPresstressed reinforcing steel elasticity modulus (N/mm2)；
The high-strength finish rolling deformed bar for the use of diameter being 25mm, according to " concise calculation on Construction handbook (fourth edition) " table 2-61
Obtaining fining twisted steel elasticity modulus is 2.0 × 105N/mm2, nominal area of section is 490.9mm2.The normal intensity of screw-thread steel is
fpk=540MPa.It is computed and meets the requirements.
Step 8: after the completion of tensioning, to old T-type beam 1 and injection chemical glue sealing of hole in new 2 web duct of T-type beam.
Regular reinforcement net arrangement of reinforcement is carried out according to construction is required between old T-type beam 1 and the flange plate of new T-type beam 2, using list
Face is welded to connect, and weld length is 10D (multiple that D is exactly steel area).
Step 9: after the completion of the first steel mesh and the binding of third steel mesh, starting template installation, use and draw between template
Bar connection, it is ensured that template is indeformable in casting process, while easy to disassemble.After template is installed, start concreting, mixes
Solidifying soil effectively prevent coagulation using with old T-type beam 1 or new 2 equal strength concrete of T-type beam for C40UEA expansive concrete 9
Soil cracking.Geotextiles sprinkling maintenance is covered after the completion of pouring in time, curing time is no less than 7 days.
Step 10: cast-in-place concrete intensity reaches the dismountable channel steel 5 in 80% rear, old T-type beam 1 and new 2 flange plate of T-type beam
After the completion of connection construction epoxy resin need to be coated in anchorage.To concrete strength reach design strength or more can form removal,
Entire width of spelling is completed to construct.
It in above-mentioned construction procedure, specifically constructs by operation platform 9, operation platform 9 is the operation platform built, tool
Body does not do particular determination.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. highway T beam spells wide structure under a kind of operation state characterized by comprising
New T-type beam set on old T-type beam side；
First connection member, the first connection member connect old T-type beam flange plate and new T-type beam flange plate；
Second connection member connects the first reinforcing bar of prestressing force between old T-type web and new T-type web including many places,
And the second steel mesh being set between the first reinforcing bar, it has been poured between the first reinforcing bar and the third steel mesh of the second steel mesh composition
Second concrete.
2. highway T beam spells wide structure under a kind of operation state according to claim 1, which is characterized in that described the
One connection member includes the first steel mesh for connecting old T-type beam flange plate and new T-type beam flange plate, and the first steel mesh has poured
First concrete.
3. highway T beam spells wide structure under a kind of operation state according to claim 2, which is characterized in that described the
One steel mesh includes lateral, longitudinal and slanting reinforcing bar interconnected.
4. highway T beam spells wide structure under a kind of operation state according to claim 1, which is characterized in that the company
Binding component further includes the channel steel being set between old T-type web and new T-type web.
5. highway T beam spells wide structure under a kind of operation state according to claim 4, which is characterized in that the slot
Steel is equipped with many places between old T-type web and new T-type web, and many places channel steel is set to four sides of a cuboid, slot
The length direction of steel is arranged along the horizontal distance between old T-type web and new T-type web.
6. highway T beam spells wide structure under a kind of operation state according to claim 4, which is characterized in that the slot
Steel is telescopic channel steel, and the both ends setting steel plate cushion block of channel steel is contacted with the old T-type web or with new T-type web.
7. highway T beam spells wide structure under a kind of operation state according to claim 1, which is characterized in that described the
One end of one reinforcing bar passes through the old T-type web setting, and the other end passes through the new T-type web setting, and the first reinforcing bar
Both ends be respectively provided with anchorage cushion block and bolt；
The two rows of settings of the first reinforcing bar of many places point, two, which ranked first reinforcing bar, is respectively arranged on the old T-type web and new T-type web
The upper side and lower side.
8. highway T beam spells wide structure under a kind of operation state according to claim 1, which is characterized in that described the
The material of two concrete is identical as the edge of a wing plate material of old T-type beam, new T-type beam.
9. highway T beam spells wide method under a kind of operation state, which is characterized in that including following content:
New T-type beam is set up respectively in the two sides of old T-type beam, and the sedimentation period of setting time is given to new T-type beam；
The first reinforcing bar is set between old T-type web and new T-type web；
The web that channel steel is used to support simultaneously new, the old T-type beam of wedging is set between old T-type web and new T-type web；
It is implanted into the second steel mesh between the first reinforcing bar, forms third steel mesh；
The first reinforcing bar of stretch-draw anchor；
The first steel mesh is set between old T-type beam flange plate and new T-type beam flange plate；
Concreting is carried out to the first steel mesh and third steel mesh respectively, after the completion of pouring, removes channel steel.
10. highway T beam spells wide structure under a kind of operation state according to claim 1, which is characterized in that it is described
The two sides of old T-type beam set up new T-type beam respectively, and after the completion of giving the sedimentation period of setting time to new T-type beam, to old T-type beam
Anticollision barrier cutting, be cut into cement water horse and lifted；And the concrete of the flange plate of old T-type beam is abolished.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965484A (en) * | 2019-12-17 | 2020-04-07 | 中交路桥建设有限公司 | New and old bridge widening reinforcing method |
| CN111042010A (en) * | 2019-12-27 | 2020-04-21 | 湖北建科国际工程有限公司 | T-beam bridge widening structure and construction method |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570960A (en) * | 2009-05-08 | 2009-11-04 | 北京市市政专业设计院有限责任公司 | Fastening method of T-shaped beam bridge |
| CN102286921A (en) * | 2011-05-25 | 2011-12-21 | 河南省九建工程有限公司 | bridge widening splicing structure and construction method thereof |
| KR101134537B1 (en) * | 2011-06-10 | 2012-04-13 | (주)연우지앤비 | Crack prevention structure of bridge slab |
| CN204491425U (en) * | 2014-12-23 | 2015-07-22 | 衡水橡胶股份有限公司 | A kind of external prestressing strengthening structure of T-shaped bridge diaphragm |
| CN105821777A (en) * | 2016-05-13 | 2016-08-03 | 安徽省交通规划设计研究总院股份有限公司 | Prestressed concrete diaphragm for connection of old bridge and new bridge and construction method of prestressed concrete diaphragm |
| CN205636524U (en) * | 2016-05-13 | 2016-10-12 | 安徽省交通规划设计研究总院股份有限公司 | A prestressed concrete cross slab for new and old bridge is connected |
| CN107227694A (en) * | 2017-07-27 | 2017-10-03 | 长安大学 | A kind of concrete-bridge transversely strengthening construction |
| CN207672411U (en) * | 2017-12-25 | 2018-07-31 | 山西省交通规划勘察设计院 | A kind of widening structure of width cantilever boxgirder |
-
2019
- 2019-08-26 CN CN201910791190.6A patent/CN110485314A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570960A (en) * | 2009-05-08 | 2009-11-04 | 北京市市政专业设计院有限责任公司 | Fastening method of T-shaped beam bridge |
| CN102286921A (en) * | 2011-05-25 | 2011-12-21 | 河南省九建工程有限公司 | bridge widening splicing structure and construction method thereof |
| KR101134537B1 (en) * | 2011-06-10 | 2012-04-13 | (주)연우지앤비 | Crack prevention structure of bridge slab |
| CN204491425U (en) * | 2014-12-23 | 2015-07-22 | 衡水橡胶股份有限公司 | A kind of external prestressing strengthening structure of T-shaped bridge diaphragm |
| CN105821777A (en) * | 2016-05-13 | 2016-08-03 | 安徽省交通规划设计研究总院股份有限公司 | Prestressed concrete diaphragm for connection of old bridge and new bridge and construction method of prestressed concrete diaphragm |
| CN205636524U (en) * | 2016-05-13 | 2016-10-12 | 安徽省交通规划设计研究总院股份有限公司 | A prestressed concrete cross slab for new and old bridge is connected |
| CN107227694A (en) * | 2017-07-27 | 2017-10-03 | 长安大学 | A kind of concrete-bridge transversely strengthening construction |
| CN207672411U (en) * | 2017-12-25 | 2018-07-31 | 山西省交通规划勘察设计院 | A kind of widening structure of width cantilever boxgirder |
Non-Patent Citations (2)
| Title |
|---|
| 杨兴华等: "既有T梁桥拓宽改造设计", 《科技信息》 * |
| 林进坤: "福泉高速公路扩建工程T梁拼接施工", 《山西建筑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965484A (en) * | 2019-12-17 | 2020-04-07 | 中交路桥建设有限公司 | New and old bridge widening reinforcing method |
| CN111042010A (en) * | 2019-12-27 | 2020-04-21 | 湖北建科国际工程有限公司 | T-beam bridge widening structure and construction method |
| 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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