CN105178164B - Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam and its construction method - Google Patents
Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam and its construction method Download PDFInfo
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- CN105178164B CN105178164B CN201510524209.2A CN201510524209A CN105178164B CN 105178164 B CN105178164 B CN 105178164B CN 201510524209 A CN201510524209 A CN 201510524209A CN 105178164 B CN105178164 B CN 105178164B
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Abstract
The invention discloses a kind of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam, the span centre position of box beam uses fish belly beam section, fish belly beam section lower flange is the concrete edge of a wing, the web of span centre fish belly beam section uses Wavelike steel webplate, bearing beam section uses contour concrete box girder, the elongated prestressing with bond beam of tensioning in the pedestal beam section concrete box girder web of span centre fish belly sill section concrete lower flange.Accordingly, inventor has also set up corresponding construction method, using the method construction safety, convenient, fast.In a word, the rigidity of beam body greatly improved in the present invention, it is to avoid the air exposure of the prestressed cable of Wavelike steel webplate combination beam, and the durability and reliability of combined beam structure greatly improved, the big obstacle that Wavelike steel webplate combination beam is promoted on a large scale is removed.
Description
Technical field
The invention belongs in communications and transportation bridge engineeting field, more particularly to a kind of prefabrication and lifting fish belly Wavelike steel webplate body
Prestressing combined box beam and its construction method.
Background technology
Compared with normal concrete box beam, Wavelike steel webplate combination beam employs Wavelike steel webplate and replaces concrete web,
Deadweight can be greatly reduced.But, Wavelike steel webplate combination beam needs prestressing force to ensure the rigidity of span centre and prevent span centre bottom wing
The concrete slab cracking of edge, mainly uses external pre-stress bundle in current engineering, can external pre-stress bundle durability it is low, and appearance
Easily occurs fatigue, after certain time limit (20-30) use, in fact it could happen that burn into is broken, and has buried the peace of this kind of structure
Full hidden danger, therefore, constrains the extensive use of the structure.
The content of the invention
The technical problem to be solved in the present invention is to propose that a kind of simple in construction, prefabrication and lifting process simplicity, economic performance are good
Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam and its construction method.
In order to solve the above technical problems, the present invention uses following technical scheme：In prefabrication and lifting fish belly Wavelike steel webplate body
Prestressing combined box beam, the span centre position of combined box beam uses fish belly beam section, and fish belly beam section lower flange is the concrete edge of a wing, span centre
The web of fish belly beam section uses Wavelike steel webplate, and bearing beam section uses contour concrete box girder, in span centre fish belly beam section coagulation
The elongated prestressing with bond beam of tensioning in native lower flange-pedestal beam section concrete box girder web.
The lower flange curve of span centre fish belly beam section uses circular curve, parabola or catenary.
The ratio between span centre deck-molding and girder span footpath L are controlled between 1/13-1/25.
Combined box beam bearing beam section section uses contour box section, and contour box section uprises section with fish belly beam section
Intersection section is more than the 1/20 of girder span footpath with starting setting up the cross-sectional distance of Wavelike steel webplate.
Arrangement length of the span centre Wavelike steel webplate along beam longitudinal direction is controlled between the 1/2-3/4 in girder span footpath.
The contour box beam height of bearing beam section and the ratio of span centre fish belly beam section maximum height are controlled between 1/2-2/3.
The construction method of above-mentioned prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam, comprises the following steps：
<1>Prefabricated Wavelike steel webplate, the prefabricated processing Wavelike steel webplate of the shape as needed for fish belly web and its upper and lower steel edge of a wing
And shear connector；
<2>Set up box beam concrete template, assembling reinforcement, and by prefabricated Wavelike steel webplate location and installation in concrete blinding
On, bellows is set in span centre fish belly sill section concrete lower flange-pedestal beam section concrete web, corrugated tube end is arranged on
Web plate and top plate juncture area；
<3>Casting concrete, curing concrete post-stretching span centre fish belly sill section concrete lower flange-pedestal beam section concrete
Elongated presstressed reinforcing steel in web, forms fish belly Wavelike steel webplate prestressing with bond combined box beam.
There is the changeover portion of smooth-going starting setting up the web near Wavelike steel webplate section, transition section length is L/20-L/
Between 30.
The intersection section that section is uprised in the contour section of standoff region and fish belly beam section sets concrete diaphragm plate.
Concrete diaphragm plate is set in span centre fish belly beam section, WELDING STUDS is welded on Wavelike steel webplate to connect；Tabula
Plate uses concrete porosity diaphragm plate, and WELDING STUDS is arranged on Wavelike steel webplate in row vertical distribution 2-3.
For the low technical barrier of Wavelike steel webplate beam external pre-stress bundle durability, inventor designs a kind of prefabrication and lifting
Fish belly Wavelike steel webplate prestressing with bond combined box beam, the span centre position of box beam uses fish belly beam section, and fish belly beam section lower flange is
The concrete edge of a wing, the web of span centre fish belly beam section uses Wavelike steel webplate, and bearing beam section uses contour concrete box girder, across
The elongated prestressing with bond beam of tensioning in middle fish belly sill section concrete lower flange-pedestal beam section concrete box girder web.Prestressing force
Muscle is anchored in the web of beam end with top plate boundary position, and span centre fish belly beam section web, which adopts Wavelike steel webplate, can be greatly reduced bridge
Beam is conducted oneself with dignity, and beneficial to prefabricated, lifting, reduces the cost of beam body；Meanwhile, span centre fish belly sill section concrete lower flange-bearing beam section
The elongated prestressing with bond beam of tensioning in concrete box web, solves Wavelike steel webplate composite beam bridge external prestressing durable
The problem of property is low.Accordingly, inventor has also set up corresponding construction method, using the method construction safety, convenient, fast.In a word,
The rigidity of beam body greatly improved in the present invention, it is to avoid the air exposure of the prestressed cable of Wavelike steel webplate combination beam, significantly carries
The high durability and reliability of combined beam structure, removes the big obstacle that Wavelike steel webplate combination beam is promoted on a large scale.
Brief description of the drawings
Fig. 1 is the facade arrangement schematic diagram of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam of the present invention.
Fig. 2 is the schematic perspective view of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam of the present invention.
Fig. 3 is to apply the highway engineering combination beam facade layout drawing in 1.
Fig. 4 is the span centre cross sectional arrangement figure in Fig. 3.
Fig. 5 is the bearing uiform section cross sectional arrangement figure in Fig. 3.
Fig. 6 is to apply the railway engineering combination beam facade layout drawing in 2.
Fig. 7 is the span centre cross sectional arrangement figure in Fig. 6.
Fig. 8 is the bearing uiform section cross sectional arrangement figure in Fig. 6.
In figure：1 box beam top flange plate, 2 bearing uiform section beam section webs, 3 Wavelike steel webplates combine the bottom wing listrium of beam section,
4 bearing uiform section beam sections are with combining the changeover portion of beam section close to top flange concrete web, 5 bearing uiform section beam sections and combination beam
The changeover portion of section close to lower flange concrete web, 6 close to the high section such as bearing bottom wing listrium, 7 span centre fish belly beam section bottom wings
Elongated prestressing tendon in edge-bearing beam section web, 8 span centre Wavelike steel webplates, 9 Wavelike steel webplate top flange steel plates, 10 waveforms
Steel web bottom wing listrium, 11 diaphragm plates, the wet seam of 12 top flange plates, the wet seam of 13 diaphragm plates, 14 without tiny fragments of stone, coal, etc. guidance tape, 15 high ferro iron
Rail, 16 bearing beam sections, 17 span centre fish belly beam sections, 18 WELDING STUDSs.
Embodiment
First, the basic structure (Fig. 1 to 2) of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam
The span centre position of box beam uses fish belly beam section, and fish belly beam section lower flange is the concrete edge of a wing, span centre fish belly beam section
Web uses Wavelike steel webplate, and bearing beam section uses contour concrete box girder, span centre fish belly sill section concrete lower flange-
The elongated prestressing with bond beam of tensioning in seat beam section concrete box girder web.
By the Mechanics Calculation to a variety of curves, the lower flange curve of span centre fish belly beam section using circular curve, parabola or
This 3 kinds of linear forces of catenary the most reasonable and configuration is graceful.
Based on Mechanics Calculation and statistical analysis, the ratio between the span centre deck-molding and girder span footpath can select larger when across footpath is larger
Value, because span centre fish belly section uses steel web, girder can't be dramatically increased using the ratio between larger span centre deck-molding and girder span footpath
Deadweight, and the increase of span centre position deck-molding can be substantially improved the rigidity of girder, and load lifting effect is notable；In addition, railway bridge
Should be using the ratio between larger span centre deck-molding and girder span footpath, to bear larger train load, 1/13 span centre deck-molding and girder span footpath
The ratio between can meet the use of 10,000 tons of heavy trains.Further accordance with Mechanics Calculation, if span-depth radio is less than 1/25, bearing beam section is cut
Height needed for face can be more than spaning middle section height, beam body non-fish belly beam section form.Therefore the ratio between span centre deck-molding and girder span footpath L control
System is between 1/13-1/25.
Combined box beam bearing beam section section uses contour box section, and contour box section uprises section with fish belly beam section
Intersection section should be greater than the 1/20 of girder span footpath with starting setting up the cross-sectional distance of Wavelike steel webplate.Because bearing beam section etc.
When with the intersection section that span centre fish belly beam section uprises beam section larger rigidity mutation occurs for high section, waveform steel abdomen is started setting up
Larger rigidity mutation can also occur for the section of plate, so the distance between the two abrupt-change cross sections should be controlled, to prevent two
The rigidity mutation appearance in individual section is superimposed and causes tension at structural mutation excessive.Pass through FEM calculation, the two rigidity
Abrupt-change cross section spacing is more than the 1/20 of girder span footpath, you can make the concrete pulling of Wavelike steel webplate and concrete web connecting portion should
Power meets the requirement of concrete tension design load.
Understood according to quantities calculation statistics, arrangement length of the span centre Wavelike steel webplate along beam longitudinal direction is controlled in girder span footpath
Between 1/2-3/4, it can about mitigate girder 20%-30% deadweight, the uniform beam segment length (L/8-L/ of the close bearing left
4) demand of arrangement space of the prestressing with bond in bearing beam section web can just be met.
The contour box beam height of bearing beam section and the ratio of span centre fish belly beam section maximum height are controlled between 1/2-2/3.Lean on
Length control of the nearly standoff region web along girder determines that the design shear near bearing should expire according to the design shear of girder
Foot：
V≤tfhffvWith 0.75AgfgTan θ and Asfstanθ
In formula, V is design shear, and tf is web thickness, hfFor web height, fv is web shearing strength design load, Ag
For the steel strand wires gross area, fg is steel strand wires tensile strength design load, and θ is that steel strand wires or the ladle concrete edge of a wing are pressed from both sides with horizontal direction
Angle, As is ladle edge of a wing steel area, and fs is ladle edge of a wing steel tensile strength design load.
2nd, the construction method of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam
<1>Prefabricated Wavelike steel webplate, the prefabricated processing Wavelike steel webplate of the shape as needed for fish belly web and its upper and lower steel edge of a wing
And shear connector；
<2>Set up box beam concrete template, assembling reinforcement, and by prefabricated Wavelike steel webplate location and installation in concrete blinding
On, bellows is set in span centre fish belly sill section concrete lower flange-pedestal beam section concrete web, corrugated tube end is arranged on
Web plate and top plate juncture area；
<3>Casting concrete, curing concrete post-stretching span centre fish belly sill section concrete lower flange-pedestal beam section concrete
Elongated presstressed reinforcing steel in web, forms fish belly Wavelike steel webplate prestressing with bond combined box beam.
Wherein, there should be the changeover portion of smooth-going starting setting up the web near Wavelike steel webplate section, transition section length is
Between L/20-L/30.By FEM calculation, arrangement length can will concentrate tension drop for L/30-L/20 web changeover portion
It is low to not setting less than the 1/3 of changeover portion, concrete tensile strength design requirement can be met.
The intersection section for uprising section in the contour section of standoff region and fish belly beam section should set concrete diaphragm plate,
To increase the torsional rigidity at the section, reduce the influence of torsional rigidity mutation.
If concrete diaphragm plate need to be set in span centre fish belly beam section, WELDING STUDS can be welded on Wavelike steel webplate to even
Connect.Diaphragm plate typically uses concrete porosity diaphragm plate to mitigate deadweight, and WELDING STUDS is in row vertical distribution on Wavelike steel webplate
2-3 is arranged.3rd, the application of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam
Application examples 1 (Fig. 3 to 5)
Certain highway Viaduct Design across footpath be 40m, the ooze section low bearing capacity of project site, thus require top tie
The weight of structure girder reduces 20%-30%, at the same require reduction cost and girder can prefabrication and lifting, therefore use proposed by the present invention
Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam as superstructure scheme.
Main span is 40m, and the ratio between span centre deck-molding and across footpath elect 1/14 as, and span centre deck-molding is 2.8m, pedestal beam a height of 1.8m, double
To 6 tracks, Bridge Design width is 21.5m.Using 4 box beams.The wide 5m of top surface of every box beam, top plate thickness is 20cm, abdomen
Plate thickness is 18cm, and base plate thickness is 25cm.Along beam in concrete web near span centre fish belly type lower flange concrete slab-bearing
Elongated prestressing with bond steel strand wires are set.The facade layout drawing of beam is shown in Fig. 3, and span centre cross sectional arrangement figure is shown in Fig. 4, bearing uiform section
Section cross sectional arrangement figure is shown in Fig. 5.After the completion of fish belly Wavelike steel webplate prestressing with bond combined box beam is prefabricated, using loop wheel machine by beam
Body is lifted, and pours the wet seam of bridge floor, diaphragm plate, forms bridge superstructure.
Application examples 2 (Fig. 6 to 8)
Certain high speed railway box girder design across footpath is 30m, and owner's unit is required using box beam (no tiny fragments of stone, coal, etc. guidance tape), the weight of box beam
Mitigation 30% is needed, external pre-stress bundle is prohibitted the use of, girder need to be constructed using prefabrication and lifting mode, therefore uses present invention proposition
Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam as superstructure scheme.
Main span is 30m, and the ratio between span centre deck-molding and across footpath elect 1/13.5 as, and span centre deck-molding is 2.2m, a height of 1.5m of pedestal beam,
Double rails, a width of 9m of bridge floor are set.Using 2 box beams, the wide 4.35m of every top surface of the beam, top plate thickness is 20cm, and web thickness is
20cm, base plate thickness is 25cm.The facade layout drawing of beam is shown in Fig. 6, and span centre cross sectional arrangement figure is shown in Fig. 7, bearing uiform section Duan Heng
Section layout drawing is shown in Fig. 8.After the completion of fish belly Wavelike steel webplate prestressing with bond combined box beam is prefabricated, beam body is hung using loop wheel machine
Dress, and the wet seam of bridge floor, diaphragm plate is poured, form bridge superstructure.
Practice have shown that, the present invention is contrasted with conventional concrete box beam, and deadweight reduces 20%-30%, comprehensive cost reduction
10% or so, use elongated prestressing with bond beam on Wavelike steel webplate combination beam, it is to avoid Wavelike steel webplate externally cable
Atmospheric exposure, improve the durability of bridge, and can be easily prefabricated with lifting girder, situ wet operation amount is small, and lifting is fast
Speed, safety, no airborne dust operation, economic and social profit are good, with very strong competitive advantage.Table 1 lists waveform of the present invention
The important technological parameters of steel web pre-stressed box and normal concrete box beam, common Wavelike steel webplate beam, steel box-girder are contrasted.
The Wavelike steel webplate pre-stressed box of the present invention of table 1 and normal concrete box beam, common Wavelike steel webplate beam, steel box-girder
Important technological parameters
Claims (10)
1. a kind of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam, it is characterised in that：The combined box beam
Span centre position uses fish belly beam section, and fish belly beam section lower flange is the concrete edge of a wing, and the web of span centre fish belly beam section uses waveform steel
Web, bearing beam section uses contour concrete box girder, in span centre fish belly sill section concrete lower flange-pedestal beam section concrete case
The elongated prestressing with bond beam of tensioning in web.
2. prestressing with bond combined box beam according to claim 1, it is characterised in that：The bottom wing of the span centre fish belly beam section
Edge curve uses circular curve, parabola or catenary.
3. prestressing with bond combined box beam according to claim 2, it is characterised in that：The span centre deck-molding and girder span footpath L
The ratio between control between 1/13-1/25.
4. prestressing with bond combined box beam according to claim 1, it is characterised in that：The combined box beam bearing beam section is cut
Face uses contour box section, and contour box section uprises the intersection section in section with fish belly beam section and starts setting up waveform steel
The cross-sectional distance of web is more than the 1/20 of girder span footpath.
5. prestressing with bond combined box beam according to claim 1, it is characterised in that：The span centre Wavelike steel webplate is along beam
The arrangement length of longitudinal direction is controlled between the 1/2-3/4 in girder span footpath.
6. prestressing with bond combined box beam according to claim 1, it is characterised in that：The contour box beam of the bearing beam section
The ratio of height and span centre fish belly beam section maximum height is controlled between 1/2-2/3.
7. the construction method of prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam, its feature described in claim 1
It is to comprise the following steps：
<1>Prefabricated Wavelike steel webplate, the shape as needed for fish belly web is prefabricated to process Wavelike steel webplate and its upper and lower steel edge of a wing and cuts
Power connector；
<2>Set up box beam concrete template, assembling reinforcement, and by prefabricated Wavelike steel webplate location and installation on concrete blinding,
Bellows is set in span centre fish belly sill section concrete lower flange-pedestal beam section concrete web, corrugated tube end is arranged on beam
End web and top plate juncture area；
<3>Casting concrete, curing concrete post-stretching span centre fish belly sill section concrete lower flange-pedestal beam section concrete web
In elongated presstressed reinforcing steel, formed fish belly Wavelike steel webplate prestressing with bond combined box beam.
8. construction method according to claim 7, it is characterised in that：Starting setting up the abdomen near Wavelike steel webplate section
Plate has the changeover portion of smooth-going, and transition section length is between L/20-L/30.
9. construction method according to claim 7, it is characterised in that：Become in the contour section of standoff region and fish belly beam section
The intersection section in high section sets concrete diaphragm plate.
10. construction method according to claim 7, it is characterised in that：In span centre fish belly beam section, concrete diaphragm plate is set,
WELDING STUDS is welded on Wavelike steel webplate to connect；The diaphragm plate uses concrete porosity diaphragm plate, and the WELDING STUDS exists
Arranged on Wavelike steel webplate in row vertical distribution 2-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510524209.2A CN105178164B (en) | 2015-08-25 | 2015-08-25 | Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510524209.2A CN105178164B (en) | 2015-08-25 | 2015-08-25 | Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam and its construction method |
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| CN105178164A CN105178164A (en) | 2015-12-23 |
| CN105178164B true CN105178164B (en) | 2017-07-21 |
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| CN201510524209.2A Expired - Fee Related CN105178164B (en) | 2015-08-25 | 2015-08-25 | Prefabrication and lifting fish belly Wavelike steel webplate prestressing with bond combined box beam and its construction method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107386090A (en) * | 2017-06-09 | 2017-11-24 | 中铁二院工程集团有限责任公司 | The more chamber box girder with corrugated steel webs constructions of combined type |
| CN108560564A (en) * | 2018-05-24 | 2018-09-21 | 东南大学 | A kind of band tilts the deep foundation pit support prestressing force fish belly sill of strut |
| CN108560562A (en) * | 2018-05-24 | 2018-09-21 | 东南大学 | A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill |
| CN108677678B (en) * | 2018-06-21 | 2024-03-01 | 中设科欣设计集团有限公司 | Single-box concrete-multi-box steel space structure hybrid beam bridge |
| CN112343343B (en) * | 2020-11-27 | 2022-04-22 | 东南大学 | 3D printing method for concrete special-shaped web-free reinforced beam |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2186913C1 (en) * | 2001-08-14 | 2002-08-10 | Петербургский государственный университет путей сообщения | Prestressed trussed beam |
| CN101881060B (en) * | 2010-07-30 | 2011-12-07 | 白福波 | Prestressed concrete mansard rigid-frame beam |
| CN201952724U (en) * | 2011-03-25 | 2011-08-31 | 中铁二院工程集团有限责任公司 | Prestressed-concrete simply-supported whole-hole box beam |
| KR101483173B1 (en) * | 2012-07-31 | 2015-01-16 | 권예지 | Corrugated steel plate web-PSC composite beam and Construction method of corrugated steel plate web-PSC composite beam |
| CN103541548B (en) * | 2013-08-23 | 2016-09-07 | 中国建筑第八工程局有限公司 | Fish belly sill construction method |
| CN203807928U (en) * | 2014-04-08 | 2014-09-03 | 西安公路研究院 | Corrugated-steel-web combined box girder |
| CN104074141A (en) * | 2014-07-10 | 2014-10-01 | 新疆维泰开发建设（集团）股份有限公司 | Construction method for small-radius curve fish belly type continuous box girder |
| CN104533017A (en) * | 2014-12-12 | 2015-04-22 | 苏州工业园区设计研究院股份有限公司 | Fish belly type longspan vierendeel truss structure |
| CN204491390U (en) * | 2015-01-07 | 2015-07-22 | 安徽湖滨建设集团有限公司 | A kind of big cross section fish-belly box beam structure |
| CN205035729U (en) * | 2015-08-25 | 2016-02-17 | 广西交通科学研究院 | Internal prestressing force of prefabricated hoist and mount fish belly wave form steel web combination case roof beam |
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