CN106869012B - Using the prefabricated thin-wall bent cap of prestressing with bond system - Google Patents
Using the prefabricated thin-wall bent cap of prestressing with bond system Download PDFInfo
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- CN106869012B CN106869012B CN201710190445.4A CN201710190445A CN106869012B CN 106869012 B CN106869012 B CN 106869012B CN 201710190445 A CN201710190445 A CN 201710190445A CN 106869012 B CN106869012 B CN 106869012B
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- Prior art keywords
- bent cap
- bridge
- regular reinforcement
- wall
- top plate
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a kind of prefabricated thin-wall bent caps using prestressing with bond system, and including outer concrete construction and its internal hollow area, hollow area is embedded with bent cap liner；Outer concrete construction includes bent cap top plate, bent cap bottom plate and bent cap web, and two blocks of bent cap webs are respectively perpendicular between two sides for being set to bent cap top plate and bent cap bottom plate, and the both ends of outer concrete construction are equipped with beam-ends wall；Deformed bar anchorage is equipped in the beam-ends wall of both ends, there is the deformed bar of direction across bridge in bent cap top plate with tensioning equal in bent cap web, the deformed bar anchorage of deformed bar from one end beam-ends wall extends to the deformed bar anchorage of other end beam-ends wall.The present invention effectively reduces the overall weight of bent cap, thus at the scene assembling construction when reduce the use of heavy construction equipment, the difficulty for reducing on-site consolidation construction, save site operation measure cost；Transhipment bent cap is reduced simultaneously to damage caused by bent cap preponderance is pavement of road in the process.
Description
Technical field
The present invention relates to bridge technology field, more particularly to a kind of prefabricated thin-wall bent cap using prestressing with bond system.
Background technology
Prefabricated bridge technique is had been widely used in bridge construction engineering at present, existing precast bridge is common
There is " concrete prefabricated bent cap+concrete column " structure based on " embedded sleeve barrel connection " or based on " grouting bellows " connection
System.
But above structure system there is concrete bent cap weight it is bigger than normal the problem of.Especially for bridge single span across footpath
For the bridge of wide more than the 24m of more than 30m, bridge, no matter bridge is using which kind of superstructure, the weight of one of precast concrete bent cap
At least up to 150 tons of amount.For 150 tons of the precast concrete bent cap of at least weighing, heavy construction machine must be configured in site operation
Tool, working measure take higher, and difficulty of construction is larger；Meanwhile transport precast concrete bent cap to construction site from pre-fabricated factory,
No matter using which kind of means of transport, transport by way of road can't bear the heavy load, road may be broken by destructiveness under weight
It is bad.
Invention content
In view of the drawbacks described above of the prior art, technical purpose of the invention is to provide a kind of using prestressing with bond system
The prefabricated thin-wall bent cap of system, transfer track path loss evil caused by improving prior art bent cap preponderance is big, difficulty of construction is big, construction
The defects of measure expense is high.
To achieve the above object, the present invention provides a kind of prefabricated thin-wall bent cap using prestressing with bond system, including
Outer concrete, which is constructed, to be embedded with the hollow area inside outer concrete construction, the hollow area in bent cap
Courage；The outer concrete construction includes bent cap top plate, bent cap bottom plate and bent cap web, and two blocks of bent cap webs are respectively perpendicular
It is set between the bent cap top plate and two sides of the bent cap bottom plate, the both ends of the outer concrete construction are equipped with beam
End wall；It is equipped with deformed bar anchorage described in both ends in beam-ends wall, is opened in the bent cap top plate and in the bent cap web
Drawing has the deformed bar of direction across bridge, and the deformed bar anchorage of the deformed bar from beam-ends wall described in one end extends to separately
The deformed bar anchorage of beam-ends wall described in one end.
Further, the tabula that the confluence setting twice of the outer concrete construction and bridge column pier are vertically arranged
Plate, the top of the diaphragm plate are fixedly connected with the bent cap top plate, and the bottom end of the diaphragm plate is fixed with the bent cap bottom plate
Connection；Equipped with the anchor bar that embedded sleeve barrel and the embedded sleeve barrel are subsidiary, the embedded sleeve barrel interface court in the diaphragm plate
Under, for being attached with the bridge column pier.
Further, the bent cap top plate, the bent cap bottom plate, the bent cap web and the diaphragm plate by grade not
Strong concrete less than C70 grades pours.
Further, it is configured in the bent cap top plate, the bent cap web, the bent cap bottom plate and the diaphragm plate general
Logical reinforcing bar；Direction across bridge regular reinforcement and vertical bridge are respectively configured in the bent cap top plate to regular reinforcement, interior point of the bent cap web
Not Pei Zhi direction across bridge regular reinforcement and vertical regular reinforcement, direction across bridge regular reinforcement and vertical bridge is respectively configured in the bent cap bottom plate
To regular reinforcement, vertical bridge is respectively configured in the diaphragm plate to regular reinforcement and vertical regular reinforcement.
Further, the direction across bridge regular reinforcement being configured in the bent cap top plate is steel bar stress, for cooperateing with
State the direction across bridge stress that deformed bar participates in bent cap, the vertical bridge being configured in the bent cap top plate to regular reinforcement be face layer
Anticracking reinforcing bar；The direction across bridge regular reinforcement being configured in the bent cap web is face layer anticracking reinforcing bar, in the bent cap web
The vertical regular reinforcement of configuration is steel bar stress, for participating in the vertical applied force of the bent cap；Match in the bent cap bottom plate
The vertical bridge put to regular reinforcement and the direction across bridge regular reinforcement be face layer anticracking reinforcing bar；It is configured in the diaphragm plate
The vertical bridge to regular reinforcement and the vertical regular reinforcement be steel bar stress, for participating in the bent cap and bridge column pier
The pressure-bearing stress of junction part.
Further, the cross-sectional outling of the hollow area is rectangle, and the beam overall of the hollow area is 1.8-2.2m,
Total a height of 1.5-2.1m of the hollow area, the bent cap top plate thickness are 20-30cm, and the bent cap web thickness is 20-
30cm, the bent cap base plate thickness are 20-50cm, and the tabula plate thickness is 30cm.
Further, the bent cap liner be light-weight high-polymer polymer liner, the light-weight high-polymer polymer liner
Equivalent density be not higher than 5kN/m3。
Further, the deformed bar is high strength low relaxed steel strand wires, and the deformed bar anchorage is intermediate plate
Anchor.
Further, the top surface of the bent cap top plate is equipped with pinner, and the pinner is used to install top structural bearings.
Further, the bottom of the pinner be equipped with concealed beam, the dark depth of beam not less than the pinner height and
Not less than 15cm, the width of the concealed beam is not less than the width of the pinner, and regular reinforcement is configured in the concealed beam.
Beneficial effects of the present invention：
The present invention has the advantages that as a result of said structure design：Bent cap is designed as hollow by the present invention
Thin-wall configuration, hollow area setting lightweight liner, on the one hand can the inside template of self-assembling formation bent cap make prefabricated construction simpler
Easily, on the other hand effectively reduce the overall weight of bent cap, thus at the scene assembling construction when reduce heavy construction equipment
Using, reduce on-site consolidation construct difficulty, save site operation measure cost；It reduces and is transported during bent cap simultaneously
It is damaged caused by bent cap preponderance is pavement of road.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
Fig. 1 is the main view semi-section structure diagram of the preferred embodiment of the present invention.
Fig. 2 is along line A-A sectional view in Fig. 1.
Fig. 3 is along line B-B sectional view in Fig. 1.
Fig. 4 is that main view section top plate deformed bar arranges schematic diagram in a preferred embodiment of the invention.
Fig. 5 is along line A-A sectional view in Fig. 4.
Fig. 6 is that main view has an X-rayed web deformed bar arrangement schematic diagram in a preferred embodiment of the invention.
In figure, 1 bent cap top plate；11 top plate deformed bars；2 bent cap webs；21 web deformed bars；3 bent cap bottom plates；
4 diaphragm plates；41 embedded sleeve barrels；42 anchor bars；5 beam-ends walls；51 intermediate plate anchors；6 bent cap liners；7 pinners；8 concealed beams；9 bridges are stood
Stub；91 reserved steel bar stresses
Specific embodiment
As shown in Figs. 1-3, a specific embodiment of the invention, the superstructure across footpath of the present embodiment Bridge for 30m~
Wide 23m~the 26m of 35m, bridge.The present embodiment structure includes the hollow section inside outer concrete construction and outer concrete construction
Domain, the cross-sectional outling of hollow area is rectangle, and the beam overall of hollow area is 1.8-2.2m, total a height of 1.5- of hollow area
2.1m, hollow area are embedded with bent cap liner 6, and bent cap liner 6 is light-weight high-polymer polymer liner, what the present embodiment was selected
Bent cap liner is vinyon PE liners, and the equivalent density of light-weight high-polymer polymer liner is not higher than 5kN/m3。
Outer concrete construction includes bent cap top plate 1, bent cap bottom plate 2 and bent cap web 3, and two blocks of bent cap webs 2 hang down respectively
It is directly set between bent cap top plate 1 and two sides of bent cap bottom plate 3, the both ends of outer concrete construction are equipped with beam-ends wall 5；Outside
Layer concrete constructs the diaphragm plate 4 being vertically arranged with the confluence of bridge column pier 9 setting twice, the top of diaphragm plate 4 and lid
Back plate 1 is fixedly connected, and the bottom end of diaphragm plate 4 is fixedly connected with bent cap bottom plate 3；Equipped with embedded sleeve barrel 41 and in advance in diaphragm plate 4
Bury the subsidiary anchor bar 42 of sleeve, embedded sleeve barrel interface downward, for being attached with bridge column pier 9.
Bent cap top plate 1, bent cap bottom plate 3, bent cap web 2 and diaphragm plate 4 are not less than C70 grades of high intensity coagulation by grade
Soil pours.
It is configured regular reinforcement in bent cap top plate 1, bent cap web 2, bent cap bottom plate 3 and diaphragm plate 4, it is general in the present embodiment
The strength grade of logical reinforcing bar is not less than HRB400；Direction across bridge regular reinforcement and vertical bridge are respectively configured in bent cap top plate 1 to ordinary steel
Muscle is respectively configured direction across bridge regular reinforcement and vertical regular reinforcement in bent cap web 2, direction across bridge is respectively configured in bent cap bottom plate 3
Vertical bridge is respectively configured to regular reinforcement and vertical regular reinforcement in diaphragm plate 4 to regular reinforcement in regular reinforcement and vertical bridge.
The direction across bridge regular reinforcement being configured in bent cap top plate 1 is steel bar stress, for deformed bar to be cooperateed with to participate in bent cap
Direction across bridge stress, the vertical bridge being configured in bent cap top plate to regular reinforcement be face layer anticracking reinforcing bar；The horizontal stroke being configured in bent cap web 2
Bridge is face layer anticracking reinforcing bar to regular reinforcement, and the vertical regular reinforcement being configured in bent cap web 2 is steel bar stress, for participating in covering
The vertical applied force of beam；The vertical bridge being configured in bent cap bottom plate 3 to regular reinforcement and direction across bridge regular reinforcement be face layer anticracking reinforcing bar；
The vertical bridge being configured in diaphragm plate 4 is steel bar stress to regular reinforcement and vertical regular reinforcement, is stood for participating in bent cap and bridge
The pressure-bearing stress of stub junction part.
1 thickness of bent cap top plate is 20-30cm, and 2 thickness of bent cap web is 20-30cm, and 3 thickness of bent cap bottom plate is 20-50cm,
4 thickness of diaphragm plate is 30cm.
The top surface of bent cap top plate 1 is equipped with pinner 7, and pinner 7 transmits superstructure and pass for installing bridge superstructure bearing
The load come.
The bottom of pinner 7 is equipped with concealed beam 8, and the height of concealed beam 8 is not less than the height of pinner 7 and is not less than 15cm, concealed beam 8
Width is not less than the width of pinner 7, and regular reinforcement is configured in concealed beam 8.Setting concealed beam 8 can effectively spread bearing pad stone 7 and pass
The vertical force come reduces the local stress suffered by bent cap top plate 1.
As Figure 4-Figure 6, it is equipped with deformed bar anchorage 51 in both ends beam-ends wall 5, in the present embodiment, deformed bar
Anchorage is intermediate plate anchor 51, in bent cap top plate 1 tensioning have a top plate deformed bar 11 of direction across bridge, in bent cap web 2 tensioning have horizontal stroke
Bridge to web deformed bar 21, top plate deformed bar 11 and web deformed bar 21 are from the pre- of one end beam-ends wall 5
Stress anchorage of reinforcement 51 extends to the deformed bar anchorage 51 of other end beam-ends wall 5.In the present embodiment, deformed bar is height
Intensity underrelaxation steel strand wires.The control stress for prestressing of above-mentioned deformed bar is taken according to current specifications.In addition, art technology
Personnel it is to be understood that the present invention as prestressed concrete member, should be by " permanent condition does not occur tensile stress (load action mark
Accurate value combines) " technical standard be designed.
Prefabricated thin-wall bent cap of the present invention is prefabricated in factory, and bent cap liner is positioned over design position first, then carries out
Assembling reinforcement is constructed, and assembling reinforcement construction includes regular reinforcement binding, the installation of deformed bar pipeline location and embedded sleeve barrel
Installation；Wherein, the arrangement of embedded sleeve barrel in the horizontal plane should be according to the reserved steel bar stress of bridge column pier in the horizontal plane
Arrangement and corresponds, the prefabricated connector of embedded sleeve barrel after the completion should expose from bent cap bottom plate root edge, for bridge column
Pier is attached.Embedded sleeve barrel and its subsidiary anchor bar are the prior art, and details are not described herein for structure.
Assembling reinforcement construction completes that bent cap liner is made reliably to be fixed among bar-mat reinforcement, and last casting concrete is formed
Outer concrete construction including bent cap top plate, bent cap web and bent cap bottom plate.Bent cap liner can be hollow body or solid
Body controls its equivalent density to be not higher than 5kN/m3.The impact force and concrete that bent cap liner is generated in casting concrete generate
Static pressure effect under, should have enough rigidity, excessive deformation must not occur, stiffness index should be by existing national highway work
The rigidity requirement of plank sheathing is performed in journey job specfication.
In addition, those skilled in the art are it is to be understood that important primary structure member of the prefabricated thin-wall bent cap of the present invention as bridge,
It should consider in design calculates by the method for automobile track lateral arrangement toward side unbalance loading, and carried out in automobile track load action
Lateral reduction coefficient must not be considered during combination.
As shown in Figure 1, the present invention is as follows with the connection method of bridge column pier：The top of bridge column pier 9 is using reserved
Steel bar stress 91 is stretched out as connector, after column pier 9 and the closely connected split of bent cap of the present invention, the reserved stress at 9 top of column pier
Reinforcing bar 91 is inserted into the embedded sleeve barrel 41 of bent cap of the present invention, reserved steel bar stress 91 and the present invention at the top for the stub that then opposes
Closely knit, to be perfused inorganic ungauged regions grouting is perfused using inorganic contraction-free grouting concrete for gap between the embedded sleeve barrel 41 of bent cap
After material reaches the predetermined time and reaches design strength, it is believed that bridge column pier connect with bent cap of the present invention and finishes.Wherein, it is inorganic
Contraction-free grouting concrete is the prior art, and performance should meet Shanghai City specifications of engineering construction《Precast assembly bridge pier technical regulation》
The related request of (DG/TJ 08-2160-2015).
Reserved steel bar stress 91 should be main steel bar stress of the bridge column pier 9 in a certain Impact direction, answer reliable earth anchor
It is fixed in column pier 9.After column pier is connect with bent cap of the present invention, reserve what steel bar stress 91 was formed with embedded sleeve barrel 41
Jointing should have I grades of connectors mechanical property (according to《Highway bridge and culvert construction technique normalizing》(JTG/T F50-2011) is attached
The related request for recording A2 performs).
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Creative work is needed according to the present invention can to conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of prefabricated thin-wall bent cap using prestressing with bond system, which is characterized in that including outer concrete construction and institute
The hollow area inside outer concrete construction is stated, the hollow area is embedded with bent cap liner；The outer concrete structure
It makes including bent cap top plate, bent cap bottom plate and bent cap web, two blocks of bent cap webs, which are respectively perpendicular, is set to the bent cap top plate
Between two sides of the bent cap bottom plate, the both ends of the outer concrete construction are equipped with beam-ends wall；Beam-ends described in both ends
Deformed bar anchorage is equipped in wall, there is the prestressing force of direction across bridge in the bent cap top plate with tensioning equal in the bent cap web
Reinforcing bar, the deformed bar anchorage of the deformed bar from beam-ends wall described in one end extend to the pre- of beam-ends wall described in the other end
Stress anchorage of reinforcement.
2. the prefabricated thin-wall bent cap according to claim 1 using prestressing with bond system, which is characterized in that the outer layer
The diaphragm plate that the confluence setting twice of concrete construction and bridge column pier are vertically arranged, the top of the diaphragm plate with it is described
Bent cap top plate is fixedly connected, and the bottom end of the diaphragm plate is fixedly connected with the bent cap bottom plate；It is equipped in the diaphragm plate pre-buried
Sleeve and the subsidiary anchor bar of the embedded sleeve barrel, the embedded sleeve barrel interface downward, for the bridge column pier into
Row connection.
3. the prefabricated thin-wall bent cap according to claim 2 using prestressing with bond system, which is characterized in that the bent cap
Top plate, the bent cap bottom plate, the bent cap web and the diaphragm plate are poured by strong concrete of the grade not less than C70 grades
It builds.
4. the prefabricated thin-wall bent cap according to claim 3 using prestressing with bond system, which is characterized in that the bent cap
Regular reinforcement is configured in top plate, the bent cap web, the bent cap bottom plate and the diaphragm plate；In the bent cap top plate respectively
Direction across bridge regular reinforcement and vertical bridge is configured to regular reinforcement, direction across bridge regular reinforcement and vertical is respectively configured in the bent cap web
Direction across bridge regular reinforcement and vertical bridge are respectively configured in the bent cap bottom plate to regular reinforcement for regular reinforcement, in the diaphragm plate point
Bridge Pei Zhi not indulged to regular reinforcement and vertical regular reinforcement.
5. the prefabricated thin-wall bent cap according to claim 4 using prestressing with bond system, which is characterized in that the bent cap
The direction across bridge regular reinforcement being configured in top plate is steel bar stress, for the deformed bar to be cooperateed with to participate in the cross-bridges of bent cap
To stress, the vertical bridge that is configured in the bent cap top plate to regular reinforcement be face layer anticracking reinforcing bar；Match in the bent cap web
The direction across bridge regular reinforcement put for face layer anticracking reinforcing bar, the vertical regular reinforcement being configured in the bent cap web be by
Power reinforcing bar, for participating in the vertical applied force of the bent cap；The vertical bridge being configured in the bent cap bottom plate is to regular reinforcement and institute
It is face layer anticracking reinforcing bar to state direction across bridge regular reinforcement；The vertical bridge being configured in the diaphragm plate is to regular reinforcement and described perpendicular
It is steel bar stress to regular reinforcement, for participating in the pressure-bearing stress of the bent cap and bridge column pier junction part.
6. the prefabricated thin-wall bent cap according to claim 5 using prestressing with bond system, which is characterized in that described hollow
The cross-sectional outling in region is rectangle, and the beam overall of the hollow area is 1.8-2.2m, total a height of 1.5- of the hollow area
2.1m, the bent cap top plate thickness are 20-30cm, and the bent cap web thickness is 20-30cm, and the bent cap base plate thickness is
20-50cm, the tabula plate thickness are 30cm.
7. according to any prefabricated thin-wall bent caps using prestressing with bond system of claim 1-6, which is characterized in that institute
Bent cap liner is stated as light-weight high-polymer polymer liner, the equivalent density of the light-weight high-polymer polymer liner is not higher than 5kN/
m3。
8. according to any prefabricated thin-wall bent caps using prestressing with bond system of claim 1-6, which is characterized in that institute
Deformed bar is stated as high strength low relaxed steel strand wires, the deformed bar anchorage is intermediate plate anchor.
9. according to any prefabricated thin-wall bent caps using prestressing with bond system of claim 1-6, which is characterized in that institute
The top surface for stating bent cap top plate is equipped with pinner, and the pinner is used to install top structural bearings.
10. the prefabricated thin-wall bent cap according to claim 9 using prestressing with bond system, which is characterized in that the pad
The bottom of stone is equipped with concealed beam, and the dark depth of beam is not less than the height of the pinner and not less than 15cm, the width of the concealed beam
Degree is not less than the width of the pinner, and regular reinforcement is configured in the concealed beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710190445.4A CN106869012B (en) | 2017-03-28 | 2017-03-28 | Using the prefabricated thin-wall bent cap of prestressing with bond system |
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| CN201710190445.4A CN106869012B (en) | 2017-03-28 | 2017-03-28 | Using the prefabricated thin-wall bent cap of prestressing with bond system |
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| CN106869012A CN106869012A (en) | 2017-06-20 |
| CN106869012B true CN106869012B (en) | 2018-06-26 |
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| CN108677685B (en) * | 2018-05-31 | 2024-01-16 | 湖南大学 | Ultra-high-performance concrete-part steel beam combined bent cap and construction method thereof |
| CN109440634B (en) * | 2018-12-11 | 2024-02-06 | 上海市城市建设设计研究总院（集团）有限公司 | Prefabricated high-strength concrete hollow bent cap structure with removable internal mold |
| CN109881574B (en) * | 2019-04-18 | 2024-04-09 | 上海市城市建设设计研究总院（集团）有限公司 | Pi-shaped cross section prefabricated bent cap adopting external prestressed tendons and prefabricating method thereof |
| CN109881575B (en) * | 2019-04-18 | 2024-03-12 | 上海市城市建设设计研究总院（集团）有限公司 | Pi-shaped cross section prefabricated bent cap adopting internal prestressed tendons and prefabricating method thereof |
| CN110396915A (en) * | 2019-07-11 | 2019-11-01 | 重庆大学 | U-shaped Steel Thin-Wall-prestress reinforcement Combined concrete bent cap and thin wall steel tube concrete pier stud joint structure and construction technology |
| CN110847044B (en) * | 2019-11-15 | 2021-09-14 | 中交二航局第一工程有限公司 | Semi-prefabricated assembled bent cap construction method |
| CN114892505A (en) * | 2022-05-11 | 2022-08-12 | 中铁第四勘察设计院集团有限公司 | Combined gate-type pier structure and construction method |
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| CN106869012A (en) | 2017-06-20 |
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