CN103215886B - Novel short segment steel box-concrete combined beam - Google Patents
Novel short segment steel box-concrete combined beam Download PDFInfo
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Abstract
The invention relates to a novel short segment steel box-concrete combined beam, which belongs to the technical field of bridge engineering. The novel short segment steel box-concrete combined beam comprises a steel box beam, anti-shearing connecting elements (4) and three-side outer covering reinforced concrete structures, wherein the steel box beam is formed by short segment steel boxes (1) through split joint via split joint plates (2), the anti-shearing connecting elements (4) are arranged on the two side surfaces and the top surface of the steel box beam, the three-side outer covering reinforced concrete structures consist of concrete (3), vertical steel bars and transverse steel bars and are arranged on the two side surfaces and the top surface of the steel box beam. The novel short segment steel box-concrete combined beam has the beneficial effects that the steel box-concrete combined beam is adopted, the tensile performance of the steel boxes and the pressing resistance performance of the concrete are sufficiently utilized, the steel materials are saved, the cost is reduced, and the obvious economic performance is realized. The steel box beam adopts the segment split joint, the short segment steel boxes and the split joint plates can realize the mass production, the construction progress is fast, and the construction period is short. The combined beam adopts the three-side outer covering reinforced concrete, and adapts to the characteristic of variation of the straddle type monorail traffic rail beam line change, i.e. the three-side stress and line type variation requirement is met.
Description
Technical field
The invention belongs to technical field of bridge engineering, relate to a kind of novel short segment steel box-concrete beam, be applied to the emergency first-aid repair of straddle-type monorail transportation system operation process middle orbit beam, specifically a kind of being used for when the rail beam in operation is damaged carries out the interim structure substituted.
Background technology
Rail beam in straddle-type monorail transportation system, is not only load-carrying members, and is the guide frame guiding train operation.Rail beam has three runnings surface of wheeltrack: running face, spigot surface and stabilising surface.Vehicle BOGEY WHEEL is walked on the running face of rail beam, and vehicle guidance wheel is walked on the spigot surface of rail beam, and vehicle stabilization wheel is walked on the stabilising surface of rail beam.Therefore, rail beam should on three faces bearing load, on three face, meet single-track vehicle again run the requirement linear to rail beam.In addition, in use, all likely meet with situations such as breaking, hang badly or blow up at any time, cause cross-saddle single-track traffic operation to be interrupted, its social influence caused will be very huge to rail beam.This is with regard to needing a kind of emergent beam that can carry out replacing fast the rail beam damaged in operation, to guarantee the fast quick-recovery operation of cross-saddle single-track traffic.
At present, the rail beam majority in straddle-type monorail transportation system is precast prestressed concrete rail beam, and in order to ensure that concrete shrinkage and creep arrives stable linear requirement, this rail beam is not less than 4 months from the prefabricated time requirement to the erection that appeared on the scene.Replacing the rail beam meeting with and damage with precast prestressed concrete rail beam, greatly extending making the time of line outage.For this reason, in the urgent need to developing a kind of novel rail beam, requiring that construction speed is fast, short construction period, bearing capacity are high and the linear requirement of rail beam can be met.
Steel-concrete composite beam is often referred to type steel-concrete folding, between the two with shear connector connection for overall flexural member.This compound beam have building height little, from heavy and light, bearing capacity is high, rigidity is large feature.The compound beam that the compound beam that steel-concrete composite beam is divided into girder steel built-in and girder steel expose two kinds.The built-in compound beam of girder steel is wrapped by girder steel with concrete after placing enough stirrups to girder steel again; The compound beam that girder steel exposes is then by the structure of the girder steel exposed by shear connector and reinforced concrete combination.For giving full play to the usefulness of girder steel, conventional girder steel cross section type has i-shape steel beam, truck welding bogie and steel box-girder, and girder steel cross section is then steel box-concrete beam according to steel box-girder.
Steel box-concrete beam meets requirement for bearing capacity by the mode of steel case tension, concrete compression.It does not need the concrete in tension zone shrinkage and creep stationary phase of 4 months, greatly can shorten rail beam from prefabricated to the time of the erection that appeared on the scene.In addition, in order to accelerate the spelling speed of steel box-girder, can design in advance and processing a collection of short segment steel case.By the spelling to multistage short segment steel case, realize the assembled of whole Pin steel box-girder fast.On this basis, three external surfaces of whole Pin steel box-girder arrange longitudinal reinforcement, transverse reinforcement, concreting, a kind of novel short segment steel box-concrete beam of final formation.This compound beam can meet the requirement will replacing the stressed and LFM signal of rail beam three.
In view of this, inventor, according to theory analysis and practical experience, studies, develops and through verification experimental verification, finally produce the present invention.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of novel short segment steel box-concrete beam, construction speed is fast, short construction period, bearing capacity is high, three runnings surface of wheeltrack can be met bear vehicular load and single-track vehicle and run the requirement linear to rail beam, thus the prestressed concrete track girder damaged in operation is replaced fast, guarantee the fast quick-recovery operation of cross-saddle single-track traffic.
The technical solution adopted for the present invention to solve the technical problems is:
A novel short segment steel box-concrete beam, comprises steel box-girder, shear connector (4) and three reinforced concrete enveloped structures; Steel box-girder is spliced by scab (2) by short segment steel case (1); On the end face that shear connector (4) is arranged on steel box-girder and two sides; Three reinforced concrete enveloped structures are made up of concrete (3), longitudinal reinforcement and transverse reinforcement, on the end face being arranged on steel box-girder and two sides.
Described steel box-girder carries out splicing by short segment steel case (1) by scab (2) and connects, and splicing connection can be welding, can be that bolt connects.
Described short segment steel case (1) has different length, height and sweep, the span of length is 0.5m ~ 60m, the span of height is 0.5m ~ 2.0m, and the span of sections sweep is 50m ~ ∞ m, and the span of sections number is 1 ~ 60;
Described scab (2) has different sweeps and the gap length of gap portion, and the span of sweep is 50m ~ ∞ m, and the span of the gap length of gap portion is 0m ~ 0.20m;
Described concrete (3) has different thickness, and the span of thickness is 0.01m ~ 0.85m;
Described shear connector (4) has different height and thickness, and the span of height is 0m ~ 0.20m, and the span of thickness is 0m ~ 0.02m.
According to span, the stressing conditions that will replace rail beam, to determine on this compound beam whether Shi Hanzhang, to meet the requirement of bearing capacity; The method of Shi Hanzhang has two kinds: be respectively pre-tensioning system and post stretching; Pre-tensioning system to build before external wrapping concrete (3) Shi Hanzhang on steel box-girder, and post stretching is Shi Hanzhang on compound beam again after external wrapping concrete (3) has been built and reached design strength.
This compound beam can adjust the shape of horizontal alignment and three runnings surface of wheeltrack: be spliced to form steel box-girder fast by the short segment steel case (1) and scab (2) of selecting design in advance, can realize the first adjustment of compound beam integral linear; Then cast-in-situ concrete (3) on the end face and two sides of steel box-girder, realizes the linear final adjustment of compound beam by the change of concrete thickness.
The invention has the beneficial effects as follows:
1. adopt steel box-concrete beam, make full use of the tensile property of steel case and concrete compressive property, saving steel, reduces costs, and has significant economy;
2. steel box-girder adopts section assembling, and short segment steel case and scab can be produced in batches, and construction speed is fast, short construction period, thus the time greatly shortening emergency first-aid repair;
3. compound beam adopts three reinforced concrete envelopeds, adapts to the linear diverse feature of straddle-seat type single traffic rail beam, i.e. three stressed and linear changeable requirements.
Accompanying drawing explanation
Fig. 1 straight line short segment steel case schematic diagram.
Fig. 2 curve short segment steel case schematic diagram.
Fig. 3 straight line scab overall schematic.
Fig. 4 end face curve matching slab integral schematic diagram.
Fig. 5 side curve scab overall schematic.
Fig. 6 tri-reinforced concrete enveloped structural representations.
Fig. 7 short segment steel case assembled front space position schematic perspective view.
Fig. 8 short segment steel case adopts the assembled schematic perspective view of scab.
The steel box-girder vertical section schematic diagram of the non-Shi Hanzhang of Fig. 9.
Figure 10 applies the steel box-girder vertical section schematic diagram of pretensioned prestressing.
Figure 11 short segment steel box-concrete beam overall schematic.
The vertical section schematic diagram of the short segment steel box-concrete beam of Figure 12 Shi Hanzhang, i.e. the C-C schematic cross-section of Figure 13.
The A-A schematic cross-section of Figure 13 Figure 12.
The B-B schematic cross-section of Figure 14 Figure 12.
The vertical section schematic diagram of Figure 15 not short segment steel box-concrete beam of Shi Hanzhang, i.e. the F-F schematic cross-section of Figure 16.
The D-D schematic cross-section of Figure 16 Figure 15.
The E-E schematic cross-section of Figure 17 Figure 15.
Number in the figure: 1 is short segment steel case, and 2 is scab, and 3 is concrete, and 4 is shear connector, and 5 is running face, and 6 is spigot surface, and 7 is stabilising surface, and 8 is presstressed reinforcing steel.
Detailed description of the invention
The present invention will be further described by reference to the accompanying drawings:
Embodiment one
A kind of implementation method adopting the short segment steel box-concrete beam of pre-tensioning system:
Step one according to replace rail beam length, highly, sweep, plane turning angle and running surface of wheeltrack be linear, chooses short segment steel case (1) and scab (2), as shown in Fig. 1 ~ Fig. 5.
Short segment steel case (1) has different length, height and sweep; Scab (2) has different sweeps.
The span of the length of short segment steel case (1) is 0.5m ~ 60m, and the span of height is 0.5m ~ 2.0m, and the span of sections sweep is 50m ~ ∞ m, and the span of sections number is 1 ~ 60; The span of the sweep of scab (2) is 50m ~ ∞ m, and the span of the gap length of gap portion is 0m ~ 0.20m; The span of the thickness of concrete (3) is 0.01m ~ 0.85m; The span of the height of shear connector (4) is 0m ~ 0.20m, and the span of thickness is 0m ~ 0.02m.
Short segment steel case (1) is fixed locus according to the linear layout of target by step 2 on platform for lining, be bolted by the scab (2) of correspondence between each short segment steel case (1) and splice, or welding manner splices, thus realize the quick-assembling of steel box-girder in compound beam, as shown in Fig. 7, Fig. 8, Fig. 9.
Step 3 wears presstressed reinforcing steel (8) in steel box-girder reserving hole channel, and stretch-draw anchor, as Figure 10.
Step 4 according to replace rail beam length, highly, sweep, plane turning angle and three runnings surface of wheeltrack linear, select the arrangement of reinforcement of steel concrete in pre-designed compound beam, compound beam arrangement of reinforcement is made up of non-prestressed longitudinal reinforcement, transverse reinforcement and presstressed reinforcing steel (8); The template making external wrapping concrete is put into by design size and the assembled good steel box-girder of shape above-mentioned, rely on the making profile of template and the adjustment of size, realize the adjustment of the linear and size of compound beam three runnings surface of wheeltrack, thus meet the single-track vehicle operation requirement linear to rail beam.
According to the arrangement of reinforcement of steel concrete in compound beam, at steel box-girder end face and two sides, non-prestressed longitudinal reinforcement and transverse reinforcement are installed, then concreting, form three reinforced concrete enveloped structures; Three reinforced concrete enveloped structures are combined into a stressed entirety, common bearing load by shear connector (4) and steel box-girder.In order to the requirement that satisfied opposing is curved, cut, turn round, can concrete perfusion in short segment steel case inside, compound beam end, as Figure 12, Figure 13, Figure 14.Final formation short segment steel box-concrete beam, as Figure 11.
Embodiment two
A kind of implementation method adopting the short segment steel box-concrete beam of post stretching:
Step one according to replace rail beam length, highly, sweep, plane turning angle and running surface of wheeltrack be linear, chooses short segment steel case (1) and scab (2), as shown in Fig. 1 ~ Fig. 5.
Short segment steel case (1) has different length, height and sweep; Scab (2) has different sweeps.
The span of the length of short segment steel case (1) is 0.5m ~ 60m, and the span of height is 0.5m ~ 2.0m, and the span of sections sweep is 50m ~ ∞ m, and the span of sections number is 1 ~ 60; The span of the sweep of scab (2) is 50m ~ ∞ m, and the span of the gap length of gap portion is 0m ~ 0.20m; The span of the thickness of concrete (3) is 0.01m ~ 0.85m; The span of the height of shear connector (4) is 0m ~ 0.20m, and the span of thickness is 0m ~ 0.02m.
Short segment steel case (1) is fixed locus according to the linear layout of target by step 2 on platform for lining, be bolted by the scab (2) of correspondence between each short segment steel case (1) and splice, or welding manner splices, thus realize the quick-assembling of steel box-girder in compound beam, as shown in Fig. 7, Fig. 8, Fig. 9.
Step 3 according to replace rail beam length, highly, sweep, plane turning angle and three runnings surface of wheeltrack linear, select the arrangement of reinforcement of steel concrete in pre-designed compound beam, compound beam arrangement of reinforcement is made up of non-prestressed longitudinal reinforcement, transverse reinforcement and presstressed reinforcing steel (8); The template making external wrapping concrete is put into by design size and the assembled good steel box-girder of shape above-mentioned, rely on the making profile of template and the adjustment of size, realize the adjustment of the linear and size of compound beam three runnings surface of wheeltrack, thus meet the single-track vehicle operation requirement linear to rail beam.
According to the arrangement of reinforcement of steel concrete in compound beam, at steel box-girder end face and two sides, non-prestressed longitudinal reinforcement and transverse reinforcement are installed, then concreting, form three reinforced concrete enveloped structures, as Fig. 6; Three reinforced concrete enveloped structures are combined into an entirety, common bearing load by shear connector (4) and steel box-girder.In order to the requirement that satisfied opposing is curved, cut, turn round, can concrete perfusion in short segment steel case inside, compound beam end, as Figure 15, Figure 16, Figure 17.
Step 4 wears presstressed reinforcing steel (8) in compound beam reserving hole channel, and stretch-draw anchor, as Figure 12, Figure 13, Figure 14.Final formation short segment steel box-concrete beam, as Figure 11.
Embodiment three
A kind of implementation method not adopting prestressed short segment steel box-concrete beam:
Step one according to replace rail beam length, highly, sweep, plane turning angle and running surface of wheeltrack be linear, chooses short segment steel case (1) and scab (2), as shown in Fig. 1 ~ Fig. 5.
Short segment steel case (1) has different length, height and sweep; Scab (2) has different sweeps.
The span of the length of short segment steel case (1) is 0.5m ~ 60m, and the span of height is 0.5m ~ 2.0m, and the span of sections sweep is 50m ~ ∞ m, and the span of sections number is 1 ~ 60; The span of the sweep of scab (2) is 50m ~ ∞ m, and the span of the gap length of gap portion is 0m ~ 0.20m; The span of the thickness of concrete (3) is 0.01m ~ 0.85m; The span of the height of shear connector (4) is 0m ~ 0.20m, and the span of thickness is 0m ~ 0.02m.
Short segment steel case (1) is fixed locus according to the linear layout of target by step 2 on platform for lining, be bolted by the scab (2) of correspondence between each short segment steel case (1) and splice, or riveted joint is spliced, or welding manner splices, thus realize the quick-assembling of steel box-girder in compound beam, as shown in Fig. 7, Fig. 8, Fig. 9.
Step 3 according to replace rail beam length, highly, sweep, plane turning angle and three runnings surface of wheeltrack linear, select the arrangement of reinforcement of steel concrete in pre-designed compound beam, compound beam arrangement of reinforcement is made up of non-prestressed longitudinal reinforcement, transverse reinforcement and presstressed reinforcing steel (8); The template making external wrapping concrete is put into by design size and the assembled good steel box-girder of shape above-mentioned, rely on the making profile of template and the adjustment of size, realize the adjustment of the linear and size of compound beam three runnings surface of wheeltrack, thus meet the single-track vehicle operation requirement linear to rail beam.
According to the arrangement of reinforcement of steel concrete in compound beam, at steel box-girder end face and two sides, non-prestressed longitudinal reinforcement and transverse reinforcement are installed, then concreting, form three reinforced concrete enveloped structures; Three reinforced concrete enveloped structures are combined into an entirety, common bearing load by shear connector (4) and steel box-girder.In order to the requirement that satisfied opposing is curved, cut, turn round, can concrete perfusion in short segment steel case inside, compound beam end, as Figure 15, Figure 16, Figure 17.Final formation short segment steel box-concrete beam, as Figure 11.
In sum, the present invention, under the prerequisite not changing monorail transit rail beam using function, by the spelling to multistage short segment steel case (1), realizes the assembled of whole Pin steel box-girder fast.On this basis, three external surfaces of whole Pin steel box-girder arrange longitudinal reinforcement, transverse reinforcement, concreting (3), a kind of novel short segment steel box-concrete beam of final formation.This compound beam can meet the requirement will replacing the stressed and LFM signal of rail beam three.Effect of the present invention has obvious lifting, has novelty, practicality, meets each important document of patent of invention, therefore proposes application for a patent for invention in accordance with the law.
Claims (5)
1. a novel short segment steel box-concrete beam, is characterized in that:
A novel short segment steel box-concrete beam, comprises steel box-girder, shear connector (4) and three reinforced concrete enveloped structures; Steel box-girder is spliced by scab (2) by short segment steel case (1); On the end face that shear connector (4) is arranged on steel box-girder and two sides; Three reinforced concrete enveloped structures are made up of concrete (3), longitudinal reinforcement and transverse reinforcement, on the end face being arranged on steel box-girder and two sides.
2. a kind of novel short segment steel box-concrete beam according to claim 1, is characterized in that:
Described steel box-girder carries out splicing by short segment steel case (1) by scab (2) and connects, and splicing connection can be welding, can be that bolt connects.
3. a kind of novel short segment steel box-concrete beam according to claim 1, is characterized in that:
Described short segment steel case (1) has different length, height and sweep, the span of length is 0.5m ~ 60m, the span of height is 0.5m ~ 2.0m, and the span of sections sweep is 50m ~ ∞ m, and the span of sections number is 1 ~ 60;
Described scab (2) has different sweeps and the gap length of gap portion, and the span of sweep is 50m ~ ∞ m, and the span of the gap length of gap portion is 0m ~ 0.20m;
Described concrete (3) has different thickness, and the span of thickness is 0.01m ~ 0.85m;
Described shear connector (4) has different height and thickness, and the span of height is 0m ~ 0.20m, and the span of thickness is 0m ~ 0.02m.
4. a kind of novel short segment steel box-concrete beam according to claim 1, is characterized in that:
According to span, the stressing conditions that will replace rail beam, to determine on this compound beam whether Shi Hanzhang, to meet the requirement of bearing capacity; The method of Shi Hanzhang has two kinds: be respectively pre-tensioning system and post stretching; Pre-tensioning system to build before external wrapping concrete (3) Shi Hanzhang on steel box-girder, and post stretching is Shi Hanzhang on compound beam again after external wrapping concrete (3) has been built and reached design strength.
5. a kind of novel short segment steel box-concrete beam according to claim 1, is characterized in that:
This compound beam can adjust the shape of horizontal alignment and three runnings surface of wheeltrack: be spliced to form steel box-girder fast by the short segment steel case (1) and scab (2) of selecting design in advance, can realize the first adjustment of compound beam integral linear; Then cast-in-situ concrete (3) on the end face and two sides of steel box-girder, realizes the linear final adjustment of compound beam by the change of concrete thickness.
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103711082B (en) * | 2013-12-30 | 2015-09-09 | 上海市隧道工程轨道交通设计研究院 | The cross-saddle single-track traffic construction method of overhead section |
| CN103790081A (en) * | 2014-01-23 | 2014-05-14 | 北京交通大学 | Steel rail beam anti-skidding surface layer for straddle type single-rail traffic |
| CN104213477A (en) * | 2014-09-22 | 2014-12-17 | 中铁工程设计咨询集团有限公司 | Straddle type single-track double-box rectangular steel-concrete composite track beam structure |
| CN104213503A (en) * | 2014-09-22 | 2014-12-17 | 中铁工程设计咨询集团有限公司 | Straddle type single-track single-box rectangular steel-concrete composite track beam structure |
| CN105986631A (en) * | 2015-01-29 | 2016-10-05 | 同济大学 | Combined beam connecting structure with orifice plates and application thereof |
| CN105178163B (en) * | 2015-09-10 | 2017-07-04 | 重庆市轨道交通设计研究院有限责任公司 | continuous beam type track |
| CN105568837A (en) * | 2015-11-10 | 2016-05-11 | 北京交通大学 | Technology for improving stress state of track beam with bottom opening |
| CN105888135B (en) * | 2016-06-02 | 2017-12-26 | 贵州大学 | A kind of Novel steel concrete combined hollow beam and preparation method thereof |
| CN106003392A (en) * | 2016-07-04 | 2016-10-12 | 北京交通大学 | Fixed-line-shaped track beam precasting formwork system for straddle type monorail transit |
| CN105970744A (en) * | 2016-07-05 | 2016-09-28 | 北京交通大学 | Base for suspension type monorail traffic track beam |
| CN108625271B (en) * | 2018-06-29 | 2020-02-07 | 李坤华 | Continuous beam bridge and incremental launching construction method thereof |
| CN115821655A (en) * | 2019-10-28 | 2023-03-21 | 江苏东南结构防灾工程有限公司 | Track beam line type control method for straddle type monorail train |
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| US4274336A (en) * | 1978-08-11 | 1981-06-23 | Hendrik Pater | Monorail guideway assembly |
| JP2000204503A (en) * | 1999-01-13 | 2000-07-25 | Hitachi Ltd | Travel girder for monorail vehicle |
| CN2336001Y (en) * | 1999-01-13 | 1999-09-01 | 中国铁道建筑总公司养马河桥梁厂 | Single track prestressed concrete bridge |
| CN1208521C (en) * | 2002-08-21 | 2005-06-29 | 中铁养马河工程股份有限公司 | Manufacturing technology of straddle type single rail prestressed reinforced concrete rail beam |
| JP4035027B2 (en) * | 2002-10-16 | 2008-01-16 | 大成建設株式会社 | Bridge girder structure and bridge girder construction method |
| CN1730818A (en) * | 2005-08-02 | 2006-02-08 | 上海市政工程设计研究院 | Preflex prestressed concrete track beam and its making method |
| JP4939302B2 (en) * | 2007-05-18 | 2012-05-23 | 東京モノレール株式会社 | Bridge superstructure and construction method of bridge superstructure |
| CN201144387Y (en) * | 2007-12-19 | 2008-11-05 | 中铁二院工程集团有限责任公司 | Track girder |
| CN101851882B (en) * | 2010-06-18 | 2011-11-30 | 北京交通大学 | Narrowing method of straddle-type monorail transit curved track beam |
| CN102877407B (en) * | 2012-10-30 | 2014-09-24 | 河南省交通规划勘察设计院有限责任公司 | Concrete continuous box girder of corrugated steel web for curved bridge |
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