CN105088932B - Novel prefabricated hollow slab and hollow slab bridge construction method using same - Google Patents
Novel prefabricated hollow slab and hollow slab bridge construction method using same Download PDFInfo
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- CN105088932B CN105088932B CN201410186712.7A CN201410186712A CN105088932B CN 105088932 B CN105088932 B CN 105088932B CN 201410186712 A CN201410186712 A CN 201410186712A CN 105088932 B CN105088932 B CN 105088932B
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- hollow slab
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Abstract
The invention relates to a novel prefabricated hollow slab and a hollow slab bridge construction method using same, and belongs to the bridge engineering field; the novel hollow slab is an improvement of a normal hollow slab, and a bottom flange is added; a pretensioning method can be used for prefabrication of the hollow slab having a cross slab; the hollow slabs are arranged side by side on a spanning, and adjacent hollow slabs are connected through the bottom flanges; in construction of a lower connecting portion f the adjacent hollow slabs, a worker can stand on the bottom for working, thus ensuring connecting quality; the top of a hollow slab side web is an upper connecting portion, and top board concrete can be casted between adjacent upper connecting portions so as to form a novel cavity; the hollow slab is provided with the prefabricated cross slab, and transverse pre-stress can be tensioned in the full bridge cross slab; the novel prefabricated hollow slab can prevent cracking problems of a normal hollow slab bridge hinge joint.
Description
Technical field
The present invention relates to a kind of new precast hollow slab and the method for building hollow slab bridge with it, belong to science of bridge building neck
Domain.
Background technology
Prefabricated assembled hollow slab bridge because its simple structure, stress clearly, easy construction, be the first-selection of Short/Medium Span Bridge
One of bridge type.At present, the bridge type has become use on highway, arterial highway most bridge types, is also that mileage number is most long
Bridge type.
Although this kind of bridge type has excellent performance, because Bridges in Our Country design specification is to hinge seam concrete strength
In the disappearance of checking computations, construction to hinge seam concrete pour attention not enough, hinge seam New-old concrete joint surface adhesion strength not
, easily there are the longitudinal cracks along hinge seam in the combined influence of the aspect factors such as foot, the load action of overloaded vehicle, and this is by domestic each
The bridge defect inquiry agency on ground confirms.The infiltration of rainwater can aggravate crack to the globality of beam body and the impact of rigidity.In overload
Under the repeated action of vehicle, hinge seam easily fails, and then " single slab bearing " phenomenon occurs.Only just there were 5 skies the country in 2011
There is collapse accident in core bridge.
By studying and thinking deeply, people gradually recognize, the stress of cored slab hinge seam mainly includes between plate shearing and laterally
Ftracture in advance in the presence of transverse bending moment moment of flexure, cracking usually hinge seam bottom.Increase the horizontal resistance to tension of hinge seam bottom
The problem that almost all hollow slab bridges are reinforced or precast hollow slab needs are solved, people gradually start to ensure horizontal from structure
The reliability of connection, the horizontal globality of bridge is increased in design usually through diaphragm plate and applying transverse prestress is increased.
Increase diaphragm plate and bring inconvenience to construction, apply transverse prestress in addition to construction operation amount is increased, also affect
The sight and under-clearance of bridge.Narrow and small seam bottom, can hardly be to take other reliable lateral connections to provide space.
The hinge seam problem of hollow slab bridge annoyings always engineers and technicians and the research worker in bridge field.
The content of the invention
The present invention is to overcome the defect of prior art, there is provided a kind of new precast hollow slab and build hollow slab bridge with it
Method, the cored slab profile increased lower flange for conventional hollow plate, during using the cored slab assembly hollow slab bridge, adjacent hollow
The lower flange end of plate is lower connecting portion, and the top of hollow slab edge web is upper connecting portion, is poured between adjacent upper connecting portion
New cavity is formed after note concrete roof.Hinge seam, the seam position of adjacent vacant core are eliminated using its assembled hollow slab bridge
Put different from conventional cored slab.The seam of adjacent panels is divided into staggering not entirely in web position, also no longer upper and lower insertion
Top board seam and base plate seam, in web near top, base plate seam is in lower flange end for top board seam.Adjacent vacant core hangs
Dress spelling is placed on behind assigned position, workman can the operation on lower flange, connect lower flange, the top board poured into a mould between the seam of top is cast-in-place mixed
After solidifying soil, a new cavity is formed.
The lower flange connection of described precast hollow slab can pour high-tensile concrete or mortar connection, also can adopt
It is connected with or welds.In the top corner of cored slab lower flange cross section, can pre-buried angle steel, during assembled hollow slab bridge,
The relative angle steel side welding of adjacent lower flanges, another side is added a cover and connected with fillet welding after a junction steel plate, also can weld on the side
The steel plate in strap bolt hole, is connected with.
The upper connecting portion Construction Joint of described precast hollow slab is tilted towards place cored slab, so that cast-in-place top board is mixed
Solidifying soil end is pressed in thereon, and the extended side web outside face of upper connecting portion, upper connecting portion has the level connection joint for crossing out
Muscle.
The cored slab bottom wing listrium connection built-in fitting used of described precast hollow slab is longitudinally arranged, the closer to span centre,
Spacing is less, and there is the level connection joint muscle for crossing out lower flange.
The cored slab cavity of described precast hollow slab can be rectangle, and the one side of connecting bolt adopts double nut.
The casting top slab and deck paving of described precast hollow slab can once-cast.
Described precast hollow slab can be prefabricated using pre-tensioning system, can precast hollow slab have a diaphragm plate, it is assembled simultaneously to connect phase
The after-applied transverse prestress of diaphragm plate answered.
Described precast hollow slab lower flange end is embedded with prestressed pore passage, anchors tooth block near cored slab end, under
After the connection of connecting portion casting concrete, apply longitudinal prestressing.
The invention has the beneficial effects as follows：As a result of new precast hollow slab and the side with its construction hollow slab bridge
Method, the connection of adjacent panels is divided into the upper connection and lower connection staggered, and eliminates hinge seam.Workman can stand in bottom wing during lower connection construction
On listrium, construction quality is guaranteed.Using the assembled hollow slab bridge of hollow sheet, it is ensured that make in horizontal flexural tensile stress
Will not ftracture with, solve the hinge seam problem for perplexing hollow slab bridge always.The making of new precast beam can utilize existing template,
Do not increase investment, increased the durability of connection, the maintenance of bridge can be reduced, save social resources.
Description of the drawings
Fig. 1 hollow sheet schematic diagrams；
Fig. 2 is using the assembled hollow slab bridge schematic cross-sectional view of hollow sheet；
Fig. 3 solder design local section schematic diagrams；
Fig. 4 circular cavity cored slab schematic cross-sectional views；
The double nose circle rectangular enclosure cored slab schematic cross-sectional views of Fig. 5；
Fig. 6 door shape cavity cored slab schematic cross-sectional views；
Cored slab schematic diagram of the top end on the inside of outer web at connecting portion on Fig. 7；
The cored slab schematic diagram of prestressed pore passage is reserved in Fig. 8 lower flanges.
Mark in figure：1. top board, 2. web, 3. base plate, 4. lower flange, 5. outer lower chamfering, 6. outside upper
Chamfering, 7. cavity, 8. in lower chamfering, 9. in upper chamfering, 10. angle steel, 11. junction steel plates, 12. top board dowels,
15. asphalt surface courses, pour top board after 16., 17. deck pavings, 18. butt welds, 19. angle weldings, 23. tooth blocks, and 24.
Prestressed pore passage, 25. lower flange lateral connection muscle.
Specific embodiment
One embodiment of the present invention is precast hollow slab as shown in Figure 1, and cored slab of the shape as conventional increased down
The edge of a wing（4）, other compositions are also including top board（1）, web（2）, base plate（3）, outer lower chamfering（5）, outside upper chamfering（6）, cavity
（7）, interior lower chamfering（8）, interior upper chamfering（9）, pre-buried angle steel（10）With top board dowel（12）.Using this precast hollow slab
During assembled hollow slab bridge, after each cored slab is lifted in spanning side by side, adjacent vacant core is in lower flange（4）Using being connected using weld seam
Connect：First use butt weld（18）Connect the relative angle steel side on the adjacent edge of a wing, then junction steel plate is placed on two adjacent angle steel
（11）, and use angle welding（19）Welding.Hollow slab edge web（2）Top be upper connecting portion, the construction of upper connecting portion connects
Seam is tilted towards place cored slab, after placing permanent roof plate template, adjusts top board dowel（12）, colligation top board longitudinal direction steel
Muscle, cast concrete roof forms a new cavity.After concrete roof intensity reaches 90%, deck paving is poured into a mould（17）,
After concrete strength reaches 90%, constructing anti-collision wall and asphalt surface course（15）.
Second embodiment of the present invention improves one embodiment, and lower flange lateral surface is pre- in the same area along longitudinal direction
Bury angle steel, the steel plate of angle steel upper surface welded bands bolt hole, during assembled hollow slab bridge, the relative angle steel side weldering of adjacent lower flanges
Connect, then the steel plate being connected with angle steel.
3rd embodiment of the present invention improves one embodiment, cored slab lower flange（4）There is the bottom wing for crossing out
Edge lateral connection muscle（25）, the cast-in-place fiber concrete or mortar for being connected by high tensile energy of lower flange.
4th embodiment of the present invention improves one embodiment, and casting top slab and deck paving can once-casts.
5th embodiment of the present invention improves one embodiment, the upper connecting portion such as Fig. 5 for the cored slab for being adopted
And Fig. 6, stretch out side web outside face.
6th embodiment of the present invention improves one embodiment, and hollow board prefabrication has diaphragm plate, in assembled cored slab
During bridge, colligation diaphragm plate connection reinforcing bar, casting concrete connects each diaphragm plate, forms the diaphragm plate of hollow slab bridge（Or be referred to as horizontal
Every beam）, tensioning transverse prestress in diaphragm plate.
7th embodiment of the present invention improves one embodiment, and precast hollow slab is as shown in fig. 7, upper connecting portion top
Plate end on the inside of outer web, leaving certain gaps uncovered by the economic plan on cored slab inner chamber, be easy to remove inside template.Prefabricated top plate portion compared with
Thickness, no longer needs to pour into a mould bridge deck pavement after erection.Stayed barbed portion is interior upper chamfering（9）, lay before cast-in-site top board
Permanent template.
8th embodiment of the present invention improves the 3rd embodiment, and precast hollow slab is as shown in figure 8, lower connecting portion
There is lower flange lateral connection muscle position（25）, lower flange（4）It is reserved with longitudinal prestressed pore passage（24）, the tooth block of anchoring（23）
Near the longitudinal end of cored slab, anchorage adopts flat anchor, lower connecting portion casting concrete connection to treat that concrete strength reaches it
After intensity 90%, in prestressed pore passage（24）Interior steel strand, tension steel strand and anchor, mud jacking.What the measure was poured after can increasing
The crack resistance of concrete connect band.
Claims (8)
1. a kind of precast hollow slab, it is characterised in that：The cored slab profile increased lower flange for conventional hollow plate, lower flange
End has lateral connection to construct, lower connecting part position when being assembly between adjacent vacant core, the top horizontal of hollow slab edge web
Dowel is extended with, to facilitate top connection during assembly between adjacent vacant core, lower flange is sufficiently wide, assembled with the cored slab
During hollow slab bridge, workman may stand in the construction that bottom connection is completed on two lower flanges drawn close, and connect top is subsequently completed
After the pouring of the place's of connecing concrete, new cavity can be formed between two neighboring cored slab.
2. precast hollow slab as claimed in claim 1, it is characterised in that：In the top corner of cored slab lower flange cross section
Place, is embedded with angle steel, during assembled hollow slab bridge, the relative angle steel side welding of adjacent lower flanges, and a junction steel plate is added a cover in another side
Connected with fillet welding afterwards.
3. precast hollow slab as claimed in claim 1, it is characterised in that：The reserved Construction Joint of the upper connecting portion of cored slab
Place cored slab is tilted towards, so that cast-in-place concrete roof end can be pressed in thereon.
4. precast hollow slab as claimed in claim 1, it is characterised in that：In the top corner of cored slab lower flange cross section
Place, is embedded with angle steel, the steel plate of angle steel upper surface welded bands bolt hole, during assembled hollow slab bridge, the relative angle of adjacent lower flanges
Steel side is welded, the steel plate being connected with angle steel.
5. precast hollow slab as claimed in claim 2, is mainly included the following steps that with its method for building hollow slab bridge：
The prefabricated cored slab of step one；
The cored slab of bridge construction site has been transported in step 2 lifting, is closely put on side by side on the corresponding bearing on pier；
Step 3 operator stands on lower flange, welds the relative angle steel side of adjacent lower flanges, then in the another of adjacent angle steel
While adding a cover a junction steel plate, connected with fillet welding；
Step 4 adjacent vacant core it is adjacent between connecting portion, lay permanent ripple steel form, adjustment top board connection
Muscle, and other roof steel bars are supplemented, concrete roof is poured into a mould, form new cavity；
After step 5 concrete roof intensity reaches 90%, the reinforcing bar in colligation bridge deck pavement pours into a mould deck paving of concrete；
After step 6 deck paving of concrete intensity reaches 90%, constructing anti-collision wall and asphalt surface course.
6. the method for building hollow slab bridge as claimed in claim 5, it is characterised in that：Lower flange end is embedded with prestress hole
Road, anchoring tooth block after lower connecting portion casting concrete connection, applies longitudinal prestressing near cored slab end.
7. the method for building hollow slab bridge as claimed in claim 5, it is characterised in that：The top board and deck paving of new cavity can
One-time cast-forming.
8. the method for building hollow slab bridge as claimed in claim 5, it is characterised in that：It is empty using pre-tensioned concrete hollow plate
There is diaphragm plate in core, connect during assembled hollow slab bridge and apply in corresponding diaphragm plate, diaphragm plate transverse prestress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186712.7A CN105088932B (en) | 2014-05-06 | 2014-05-06 | Novel prefabricated hollow slab and hollow slab bridge construction method using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186712.7A CN105088932B (en) | 2014-05-06 | 2014-05-06 | Novel prefabricated hollow slab and hollow slab bridge construction method using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105088932A CN105088932A (en) | 2015-11-25 |
| CN105088932B true CN105088932B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410186712.7A Expired - Fee Related CN105088932B (en) | 2014-05-06 | 2014-05-06 | Novel prefabricated hollow slab and hollow slab bridge construction method using same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905106A (en) * | 2017-11-10 | 2018-04-13 | 广东泰坤建设工程有限公司 | Method for bridge construction |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101024369B1 (en) * | 2008-04-11 | 2011-03-23 | 주식회사 아이비엘이앤씨 | Construction method of hollow slab bridge |
| CN201526005U (en) * | 2009-09-28 | 2010-07-14 | 江苏省交通科学研究院股份有限公司 | Prestress hollow plate girder |
| CN102330408A (en) * | 2011-08-05 | 2012-01-25 | 中国神华能源股份有限公司 | Bridge |
| CN203065951U (en) * | 2012-12-19 | 2013-07-17 | 上海市城市建设设计研究总院 | Joint structure of precast hollow slab girders |
| CN203383142U (en) * | 2013-02-04 | 2014-01-08 | 郑州长发电子科技有限公司 | Semi-rigid butt seam suitable for widening of hollow slab bridge |
| CN103556563B (en) * | 2013-11-11 | 2015-10-07 | 中铁第一勘察设计院集团有限公司 | Steel-RPC combined bridge |
| CN103741583B (en) * | 2013-12-31 | 2016-05-18 | 郑州大学 | The prefabricated case beam transverse prestress twisted wire mounting structure of plate girder bridge |
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| CN105088932A (en) | 2015-11-25 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wei Jiandong Inventor after: Luo Chuangdan Inventor after: Zeng Ziheng Inventor after: Zheng Yuanxun Inventor after: Li Xiaolong Inventor before: Wei Jiandong Inventor before: Zheng Yuanxun Inventor before: Li Xiaolong |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20210506 |