CN108374316A - Medium-and low-speed maglev traffic combination beam element, medium-and low-speed maglev traffic combination beam, rail system and construction method - Google Patents
Medium-and low-speed maglev traffic combination beam element, medium-and low-speed maglev traffic combination beam, rail system and construction method Download PDFInfo
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- CN108374316A CN108374316A CN201810123042.2A CN201810123042A CN108374316A CN 108374316 A CN108374316 A CN 108374316A CN 201810123042 A CN201810123042 A CN 201810123042A CN 108374316 A CN108374316 A CN 108374316A
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
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Abstract
The invention discloses a kind of medium-and low-speed maglev traffic combination beam elements, the composite beams are U-shaped structure, it includes the lower wing plate and two pieces of upper flanges of reinforced concrete structure, it is the Wavelike steel webplate for curving setback shape that web described in web is installed between the lower wing plate and two pieces of upper flanges, the Wavelike steel webplate includes the straight panel section and tilted plate section that polylith is connected with each other, and the straight panel section is along vertical bridge to arrangement.The present invention also provides a kind of combination beams and rail system that said combination beam element obtains, in addition, the present invention also provides a kind of construction methods of said combination beam element.It is good that the present invention takes full advantage of concrete anti-compression performance, the high advantage of Wavelike steel webplate shearing resistance yield strength, improve the service efficiency of material, and structure stress is clear, dead load can be significantly reduced, so that dead load is mitigated about 20% 30%, while having saved the quantities of bridge superstructure and substructure, is widely portable to the medium and small span bridge of 20 ~ 35m of medium-and low-speed maglev traffic or so.
Description
Technical field
The invention belongs to civil engineering bridge technology field more particularly to a kind of composite beams, combination beam, rail systems
And construction method.
Background technology
Medium-and low-speed maglev traffic is after traditional railway technology develops more than 100 years, and optimization on its basis creates
Novel rail mode.Medium-and low-speed maglev traffic has that low noise, low vibration, Low emissivity, low cost, climbing capacity are strong, turn
The advantages such as curved radius is small, have not only saved a large amount of land resource, but also provide safety for the development of urban track traffic
Reliable and energy-saving and environment-friendly new selection, is field of urban rail new development direction.In recent years, both at home and abroad in medium-and low-speed maglev
Traffic theory is studied and achieves huge achievement in engineer application, to push the application of medium-and low-speed maglev traffic to provide important skill
Art supports.
Existing medium-and low-speed maglev traffic elevated bridge mostly uses deck type concrete box-beam bridge structure, and sectional space utilizes
Rate is not high, and ride height is big, cannot provide secondary protection for derailment of magnetic levitation train.In addition it is also necessary in box beam upper flange
Between the holder of steel construction is additionally set as evacuation platform.
Although traditional city track traffic U type beam can pass through certain improvement（Inside wing plate height higher than outside or
Increase deck-molding）And remove additional evacuation platform setting from, but this U-shaped beam is generally concrete material, the disadvantage is that from great,
Stock utilization is low.Well known U-shaped beam patent, such as Publication No. CN100585081C, entitled " city track traffic U type beam "
Chinese patent, disclose a kind of city track traffic U type beam, it is curved arc shape that beam body, which uses asymmetric U-shaped construction, side,
Equal wall thickness web, side are curved arc shape not uniform thickness web, and member section changes greatly, so that web regular reinforcement need to be pre-bent to arc
Shape, and reinforcing bar need to use some additional location measures, complicated construction technique, construction quality to be relatively difficult to guarantee.In addition, web area
Account for about the 20%-30% of total cross-section, and web is smaller to the contribution of longitudinal rigidity, material use is less efficient.In addition, Publication No.
The Chinese patent of CN104963275A, entitled " the compound U-shaped beam of PSC corrugated steels of steel ", disclose a kind of compound PSC ripples of steel
The U-shaped beam of steel plate, the web form for using upside to be inclined outwardly, when being such as applied to medium-and low-speed maglev traffic, laterally using double U beams
It is arranged in juxtaposition, when lower wing plate meets medium-and low-speed maglev track arrangement, driving limit, left and right sides wing plate can be increased
Spacing, so that web is had the tendency that the deformation of lateral flare, be unfavorable for structure stress.In addition, upper limb board size is smaller, can not adapt to
The needs of medium-and low-speed maglev traffic.
Invention content
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, one kind is provided
Suitable for the composite beams of medium-and low-speed maglev traffic, combination beam, rail system and construction method.Said combination beam can solve
Hold that formula concrete box-beam bridge scetion utilization is low, the U-shaped beam material utilization amount of conventional concrete is big and existing Wavelike steel webplate is U-shaped
The problems such as beam stress is unreasonable.In order to solve the above technical problems, technical solution proposed by the present invention is：
A kind of medium-and low-speed maglev traffic combination beam element, the composite beams are U-shaped structure comprising reinforced concrete structure
Lower wing plate and two pieces of upper flanges, be installed with web between the lower wing plate and two pieces of upper flanges（Preferably, web is vertically fixed
Between lower wing plate and two pieces of upper flanges）, the web is the Wavelike steel webplate for curving setback shape, the Wavelike steel webplate packet
The straight panel section and tilted plate section of polylith interconnection are included, the straight panel section is along vertical bridge to arrangement.Curve the formation after setback shape
Straight panel section and tilted plate section are put more energy into mutually, and steel plate shearing buckling strength can be improved, and can save the setting of stiffener.
In above-mentioned medium-and low-speed maglev traffic combination beam element, it is preferred that the length of the length a and tilted plate section of the straight panel section
B is equal, and the wavelength X of the Wavelike steel webplate is 1000mm, 1200mm or 1600mm, and the thickness of the Wavelike steel webplate is
12-28mm。
In above-mentioned medium-and low-speed maglev traffic combination beam element, it is preferred that the Wavelike steel webplate is set at the bearing of bridge Dun
It is equipped with inner lining concrete, weldering nail connector, and the inner lining concrete are equipped between the inner lining concrete and Wavelike steel webplate
Length d be not less than the medium-and low-speed maglev traffic combination beam element height h.Liner coagulation is set at composite beams fulcrum
Soil, which forms compound web plate, can improve structure partial stress and stability.The weldering being equipped between inner lining concrete and Wavelike steel webplate
Nail connector can guarantee the compactness connected between inner lining concrete and Wavelike steel webplate.It is mixed that liner is set on Wavelike steel webplate
When solidifying soil, one layer can be poured in several weldering nail connectors of Wavelike steel webplate surface soldered, then on Wavelike steel webplate surface first
Concrete.
In above-mentioned medium-and low-speed maglev traffic combination beam element, it is preferred that the two sides and bottom of the upper flange are respectively provided with
Have by one piece of steel plate punched form or three blocks of steel plates be welded to each other made of upper encased steel plate, the upper end of the Wavelike steel webplate is solid
It is connected on the upper encased steel plate；The root edge both sides of the lower wing plate are also equipped with lower encased steel plate, the Wavelike steel webplate
Lower end is fixed on the lower encased steel plate.Upper flange is combined with Wavelike steel webplate and can be increased by encased steel plate with lower wing plate
The contact area of Wavelike steel webplate and upper flange, lower wing plate, can fully resist cutting between Wavelike steel webplate and upper and lower wing plate
Power, while can play the role of preventing upper and lower wing plate from vertically detaching between Wavelike steel webplate.In addition, the outsourcing at upper and lower wing plate
Steel plate is alternatively arranged as the template of upper and lower wing plate construction, facilitates the construction of upper and lower wing plate.
In above-mentioned medium-and low-speed maglev traffic combination beam element, it is preferred that be equipped with bellows, the ripple in the lower wing plate
Longitudinal prestressing steel beam is equipped in pipe, the longitudinal prestressing steel beam is to be open to the parabola shaped of the composite beams center
Shape.It is made after fully considering medium-and low-speed maglev traffic combination girder construction stress equipped with longitudinal prestressing steel beam in lower wing plate
Selection, longitudinal prestressing steel beam in the especially U-shaped lower flange of girder plate parabolically shape in lower wing plate, can make full use of pre- answer
The compressive pre-stress that power beam puts down curved offer offsets the parts transversely tensile stress that load generates, and optimizes structure tension performance.
The technical concept total as one, the present invention also provides a kind of medium-and low-speed maglev traffic combination beams, including on two
The medium-and low-speed maglev traffic combination beam element stated, two medium-and low-speed maglev traffic combination beam elements are along bridge width direction
Laid out in parallel（In double U parallel fashions）, and the height of the upper flange positioned inside is higher than the height of the upper flange positioned at outside
300-400mm。
The technical concept total as one, the present invention also provides a kind of medium-and low-speed maglev traffic combination beams, including on two
The medium-and low-speed maglev traffic combination beam element stated, two medium-and low-speed maglev traffic combination beam elements are along bridge width direction
Laid out in parallel, and the adjacent medium-and low-speed maglev traffic combination beam element shares the same Wavelike steel webplate and same upper flange
（In " mountain " font）, be located inside upper flange height it is higher 300-400mm than the height of the upper flange positioned at outside.
The technical concept total as one, the present invention also provides a kind of medium-and low-speed maglev traffic combination beam orbit system, packets
Include multiple above-mentioned medium-and low-speed maglev traffic combination beam elements or at least one above-mentioned medium-and low-speed maglev traffic combination beam（Combination beam
Can be double U parallel fashions or " mountain " font）, the medium-and low-speed maglev traffic combination beam element or medium-and low-speed maglev combination beam
Track, the section of track are equipped in U-shaped channel, for electric installation and communication device, the track is back-off in the U on the lower wing plate
Shaped steel tendon concrete structure, the section of track are fixedly arranged on the track, described to be fixedly arranged on institute for electric installation and communication device
State the inner surface of Wavelike steel webplate.
In above-mentioned rail system, it is preferred that be equipped with strong concrete block, the section of track between the track and the section of track
The billet and electro-insulating rubber pad for finely tuning section of track elevation are equipped between strong concrete block.
In above-mentioned rail system, it is preferred that the medium-and low-speed maglev composite beams and track be pour at twice and
At.Medium-and low-speed maglev traffic combination beam element of the present invention is to pour at twice with track, and track is not involved in middle low speed
Magnetic floating traffic composite beams structure entirety stress.
In above-mentioned rail system, the longitudinal platform that 2cm wide is arranged every 12-13m of track stitches, longitudinally disposed between the adjacent section of track
The rail gap of 15-30mm is deformed with adapting to section of track longitudinal extension caused by temperature.
In above-mentioned rail system, it is preferred that the structure centre line of the medium-and low-speed maglev traffic combination beam element is floating with magnetic
Train center line should coincide with same vertical plane as far as possible.
In above-mentioned rail system, it is preferred that foundation bolt can be embedded on the upper flange positioned inside, be used for affixed shield
Column.
Above-mentioned rail system is uplink and downlink two teams, magnetic-levitation train one-way traffic in combination beam.Using the rail of " mountain " font
Road system can reduce the engineering quantity of Wavelike steel webplate, cost-effective, in addition, can also mitigate the dead weight of structure to a certain extent.
When needing maintenance or emergency evacuation, maintenance personal or passenger can walk on the upper flange positioned inside, and setting guardrail can
Improve security performance.
The technical concept total as one, the present invention also provides a kind of construction parties of medium-and low-speed maglev traffic combination beam element
Method includes the following steps：
（1）Tie with reinforcing bar is carried out on pedestal, and arranges bellows in the framework of steel reinforcement of lower wing plate；
（2）Wavelike steel webplate, the installation of upper encased steel plate and lower encased steel plate is in place, the Side Template of composite beams and interior is installed
Serve as a contrast the side template of concrete；
（3）The concrete and inner lining concrete of upper flange and lower wing plate are poured, scene maintenance to concrete strength reaches design
90% or more value；
（4）Side Template is removed, tensioning longitudinal prestressing steel beam completes low speed among the above using C50 non-shrinkage concrete sealing off and covering anchorages
The construction of magnetic floating traffic composite beams.
After completing the construction of said combination beam element, then follows the steps below and complete applying for entire combination beam and rail system
Work：
（5）Track internal model and external mold are installed, bind regular reinforcement, and pour track concrete, maintenance to concrete strength
Reach the rear form removal of 80% or more design value；
（6）It lifts on U beams to the bearing of bridge pier；
（7）The section of track is installed, after the section of track is accurately positioned, cast-in-place strong concrete block completes entire combination beam and rail system
Construction.
Medium-and low-speed maglev traffic combination beam element in the present invention is as a kind of base-supporting beam bridge unit, sectional space profit
With rate height, lower wing plate can reduce support rail countertop absolute altitude as the support member of track.Web, which removes, is used as primary structure member
Outside, noise barrier can be doubled as simultaneously（When more demanding to ambient noise, noise barrier is added on upper flange that can be on the outside）,
Its inner surface can also be laid for electric installation and communication device.What the structure in the present invention was used with existing medium-and low-speed maglev traffic
Deck type box bridge structure（It demonstrates without edge of a wing small box girder, Beijing medium-and low-speed maglev traffic as Changsha magnetic floats cable release engineering separate type
Line S1 line monoblock types have edge of a wing box beam）It is compared with traditional track traffic U type beam, it is with the obvious advantage.
Compared with the prior art, the advantages of the present invention are as follows：
1, the invention belongs to the U-shaped combination beam of Wavelike steel webplate, it is good to take full advantage of concrete anti-compression performance, Wavelike steel webplate shearing resistance
Two kinds of materials of steel and concrete are effectively combined, improve the service efficiency of material by the high advantage of yield strength, and
Structure stress is clear, the problem of avoiding cracking in webs.
2, compared to traditional concrete U-type beam, web is replaced with corrugated sheet steel by the present invention by armored concrete, can be shown
Writing reduces dead load, so that dead load is mitigated about 20%-30%, while having saved the engineering of bridge superstructure and substructure
Amount the problems such as can also improving prestressing force efficiency, avoid cracking in webs, improves bridge overall durability.Meanwhile Wavelike steel webplate
After substituting concrete web, web templates are eliminated, Wavelike steel webplate is alternatively arranged as lower wing plate side form, reduces project cost.This
Outside, mitigate dead load and be conducive to prefabricated assembled construction, reduce the requirement to transport, further speed up speed of application.
3, present invention eliminates the stretching processes of the processing of web regular reinforcement, binding and prestressing tendon, so as to shorten work
Phase reduces construction cost.
4, upper flange is set as not contour form in the present invention, using upper flange on the inside of combination beam as access path or evacuation
Platform can save steel structure support.
5, the main material of rail system of the invention is corrugated sheet steel, prestressed concrete and armored concrete, is incited somebody to action
Structure stress, economic performance, sound insulation and noise reduction, beauty, operation maintenance etc. organically combine, and are a kind of environmentally friendly and money
The structure type of source economizing type can achieve the effect that reduce structure height and reduce vision, noise pollution simultaneously.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the cross-sectional configuration schematic diagram of embodiment middle orbit system.
Fig. 2 is the cross-sectional configuration schematic diagram of another rail system in embodiment.
Fig. 3 is side structure schematic diagram in Fig. 1（It is not shown in figure noise barrier and magnetic-levitation train）.
Fig. 4 is the cross-section diagram in the faces B-B in Fig. 3.
Fig. 5 is the partial enlarged view of B in Fig. 1.
Fig. 6 is the partial enlarged view of C in Fig. 1.
Fig. 7 is the partial enlarged view of A in Fig. 1.
Fig. 8 is the partial enlarged view of D in Fig. 1.
Fig. 9 is the cross-section diagram in the faces C-C in Fig. 8.
Figure 10 is the dimensional structure diagram of embodiment middle orbit system.
Marginal data：
1, noise barrier；2, upper flange；201, outside upper flange；202, inside upper flange；3, Wavelike steel webplate；31, straight panel section；
32, tilted plate section；4, inner lining concrete；5, lower wing plate；6, longitudinal prestressing steel beam；61, bellows；7, for electric installation；71, it powers
Electric wire；72, power supply wire rack；8, communication device；81, communication cable；82, communication cable holder；9, bearing；10, bridge pier；
11, weldering nail connector；12, the section of track；121, tablet；122, F steel rail；123, H-type sleeper；124, high-strength bolt；16, high-strength
Spend concrete block；18, track；20, guardrail；21, magnetic-levitation train；N26, girder construction center line；N27, magnetic-levitation train center line；
29, upper encased steel plate；N30, reference line；33, lower encased steel plate；40, billet；41, electro-insulating rubber pad.
Specific implementation mode
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection domain.
Unless otherwise specified, the various raw material etc. used in the present invention can be commercially available by market or can
It is prepared by existing method.
Embodiment：
As shown in Figure 1, Figure 2, shown in Figure 10, the medium-and low-speed maglev traffic combination beam element of the present embodiment, composite beams are U-shaped knot
Structure comprising the lower wing plate 5 of reinforced concrete structure and two pieces of upper flanges 2 are installed between lower wing plate 5 and two pieces of upper flanges 2
Web, web are the Wavelike steel webplate 3 for curving setback shape, and Wavelike steel webplate 3 includes 31 He of straight panel section that polylith is connected with each other
Tilted plate section 32, straight panel section 31 is along vertical bridge to arrangement.In the present embodiment, Wavelike steel webplate 3 is thin-walled steel plate, it is preferred that waveform steel
Web 3 is vertical with upper flange 2, lower wing plate 5.
As shown in Figure 3, Figure 4, in the present embodiment, the length a of straight panel section 31 and the length b of tilted plate section 32 are equal, and waveform
The wavelength X of steel web 3 is 1000mm, 1200mm or 1600mm, and the thickness of Wavelike steel webplate 3 is 12-28mm.
As shown in figure 4, in the present embodiment, Wavelike steel webplate 3 is arranged at medium-and low-speed maglev traffic combination beam element bearing 9
There is inner lining concrete 4, weldering nail connector 11, and the length of inner lining concrete 4 are equipped between inner lining concrete 4 and Wavelike steel webplate 3
It spends d and is not less than medium-and low-speed maglev traffic combination beam element height h.The formation of inner lining concrete 4 is set at composite beams fulcrum
Compound web plate can improve structure partial stress and stability.Weldering nail connector 11 can guarantee inner lining concrete 4 and waveform steel abdomen
The compactness connected between plate 3.It, first can be on 3 surface of Wavelike steel webplate when inner lining concrete 4 is arranged on Wavelike steel webplate 3
Several weldering nail connectors 11 are welded, then a layer concrete is cast on 3 surface of Wavelike steel webplate.
As shown in Figure 5, Figure 6, in the present embodiment, the two sides and bottom of upper flange 2 are both provided with by one piece of steel plate punched
Form or three blocks of steel plates be welded to each other made of upper encased steel plate 29, the upper end of Wavelike steel webplate 3 is welded in encased steel plate 29
On；The root edge both sides of lower wing plate 5 are also equipped with lower encased steel plate 33, and the lower end of Wavelike steel webplate 3 is welded in lower encased steel plate 33
On.Upper flange 2 and lower wing plate 5 by upper encased steel plate 29, lower encased steel plate 33 is combined with Wavelike steel webplate 3 can increase waveform
The contact area of steel web 3 and upper flange 2, lower wing plate 5, can fully resist Wavelike steel webplate 3 and upper flange 2, lower wing plate 5 it
Between shearing, while can play the role of preventing from vertically detaching between upper flange 2, lower wing plate 5 and Wavelike steel webplate 3.In addition, upper limb
The template that encased steel plate at plate 2, lower wing plate 5 is alternatively arranged as upper flange 2, lower wing plate 5 is constructed, facilitates upper flange 2, lower wing plate 5
Construction.
As shown in Figure 8, Figure 9, in the present embodiment, bellows 61 is equipped in lower wing plate 5, be equipped with longitudinal direction in bellows 61 answers in advance
Power steel beam 6, longitudinal prestressing steel beam 6 are parabolic shape of the opening to composite beams center.Longitudinal prestressing steel beam 6 is compared
In reference line N30 parabolically shapes, the compressive pre-stress that prestressing force puts down curved offer can be made full use of to offset the portion that load generates
Divide horizontal tensile stress, optimizes structure tension performance.
As shown in Figure 1, also provide a kind of medium-and low-speed maglev traffic combination beam in the present embodiment, including two it is above-mentioned in it is low
Fast magnetic floating traffic composite beams, two medium-and low-speed maglev traffic combination beam elements laid out in parallel along bridge width direction, and
Upper flange 2 positioned inside（Inside upper flange 202）Height than the upper flange 2 positioned at outside（Outside upper flange 201）Height
Spend high 300-400mm.
As shown in Fig. 2, also provide another medium-and low-speed maglev traffic combination beam in the present embodiment, including during two above-mentioned
Low speed magnetic floating traffic combination beam element, two medium-and low-speed maglev traffic combination beam elements laid out in parallel along bridge width direction,
And adjacent medium-and low-speed maglev traffic combination beam element shares same Wavelike steel webplate 3 and same upper flange 2（Inside upper flange
202）, be located inside upper flange 2 height it is higher 300-400mm than the height of the upper flange 2 positioned at outside.
A kind of medium-and low-speed maglev traffic combination beam orbit system, including multiple above-mentioned middle low speed are also provided in the present embodiment
Magnetic floating traffic composite beams or multiple above-mentioned medium-and low-speed maglev traffic combination beams, medium-and low-speed maglev traffic combination beam element or
Track 18, the section of track 12 are equipped in the U-shaped channel of medium-and low-speed maglev traffic combination beam, for electric installation 7（Including power supply electric wire 71 with
Power supply wire rack 72）With communication device 8（Including communication cable 81 and communication cable holder 82）, track 18 is back-off under
U-shaped steel tendon concrete structure on wing plate 5, the section of track 12 are fixedly arranged on track 18, fixed with communication device 8 for electric installation 7
In the inner surface of Wavelike steel webplate 3.
As shown in fig. 7, in the rail system of the present embodiment, strong concrete block is equipped between track 18 and the section of track 12
16, the billet 40 and electro-insulating rubber pad for finely tuning 12 elevation of the section of track are equipped between the section of track 12 and strong concrete block 16
41。
In the rail system of the present embodiment, the section of track 12 is by tablet 121, F shaped steel rails 122, H-type sleeper 123 and high-strength spiral shell
Bolt 124 forms, and 123 spacing of H-type sleeper is 1.0-1.2m, and 12 long 12.5m of the section of track is installed using monoblock type.Track 18 and rail
Row 12 between be equipped with strong concrete block 16, the section of track 12 be connected to by high-strength bolt 124 be embedded in it is high-strength on track platform
It spends on concrete block 16.
In the rail system of the present embodiment, medium-and low-speed maglev traffic combination beam element and track 18 be pour at twice and
At.Medium-and low-speed maglev traffic combination beam element is to pour at twice with track 18, and track 18 is not involved in middle low speed magnetic
Floating traffic combination beam element structure entirety stress.
In the rail system of the present embodiment, the girder construction center line N26 and magnetic of medium-and low-speed maglev traffic combination beam element are floating
The magnetic-levitation train center line N27 of train 21 should coincide with same vertical plane as far as possible.
In the rail system of the present embodiment, the longitudinal platform seam that 2cm wide is set every 12-13m of track 18.The adjacent section of track 12
Between longitudinally disposed 15-30mm rail gap, with adapt to the section of track caused by temperature longitudinal extension deform.
In the rail system of the present embodiment, when more demanding to noise circumstance, sound insulation can be set on outside upper flange 201
Barrier 1.
As shown in Figure 1 and Figure 2, in the rail system of the present embodiment, it is embedded with ground on the inside upper flange 202 of rail system
Foot bolt, for being connected with guardrail 20.When needing maintenance or emergency evacuation, maintenance personal or passenger can be in inside upper flanges
It walks on 202, setting guardrail 20 can improve safety.
The construction method of the medium-and low-speed maglev traffic combination beam element of the present embodiment, includes the following steps：
（1）Tie with reinforcing bar is carried out on pedestal, and bellows 61 is arranged in the framework of steel reinforcement of lower wing plate 5；
（2）Wavelike steel webplate 3, upper encased steel plate 29 and lower encased steel plate 33 are installed in place, the end mould of composite beams is installed
The side template of plate and inner lining concrete 4；
（3）The concrete and inner lining concrete 4 of upper flange 2 and lower wing plate 5 are poured, scene maintenance reaches to concrete strength to be set
90% or more evaluation；
（4）Side Template is removed, tensioning longitudinal prestressing steel beam 6 completes low speed among the above using C50 non-shrinkage concrete sealing off and covering anchorages
The construction of magnetic floating traffic composite beams.
After completing the construction of said combination beam element, then follows the steps below and complete applying for entire combination beam and rail system
Work：
（5）18 internal model of track and external mold are installed, bind regular reinforcement, and pour 18 concrete of track, maintenance to concrete
Intensity reaches form removal after 80% or more design value；
（6）It lifts on U beams to the bearing 9 of bridge pier 10；
（7）The section of track 12 is installed, after the section of track 12 is accurately positioned, cast-in-place strong concrete block 16 completes entire combination beam and rail
The construction of road system.
Medium-and low-speed maglev traffic combination beam element in the present embodiment is as a kind of base-supporting beam bridge unit, sectional space profit
With rate height, lower wing plate 5 can reduce the absolute altitude of 18 top surface of track, medium-and low-speed maglev as the support member of track 18
Traffic combination beam element can double as noise barrier simultaneously（Noise barrier 1 can be increased on upper flange 201 on the outside）.The present embodiment is
A kind of environmentally friendly and resource-conserving structure type, can reach simultaneously reduces structure height and reduction vision, noise
The effect of pollution.Medium-and low-speed maglev traffic combination beam element in the present embodiment belongs to reinforced concrete U-shaped combination beam, beam body
Main material is Wavelike steel webplate 3, prestressed concrete, armored concrete and shear connector, takes full advantage of coagulation
Native resistance to compression, the high advantage of 3 shearing resistance yield strength of Wavelike steel webplate effectively combine two kinds of materials of steel and concrete, by U
Type combined beam structure stress, economic performance, sound insulation and noise reduction, beauty, operation maintenance etc. organically combine, and improve material
Service efficiency, and structure stress is clear.Compared to traditional U-shaped beam, web is replaced with into waveform steel abdomen by armored concrete
Plate 3 can significantly reduce dead load, reduce dead load about 20%-30%, can save the engineering of superstructure and substructure
Amount, is widely portable to the medium and small span bridge of medium-and low-speed maglev traffic 20-35m or so.Prestressing force efficiency can also be improved, is kept away
Exempt from cracking in webs problem, improves bridge overall durability.Upper flange is set as not contour form, by upper flange on the inside of combination beam
As access path or evacuation platform, steel structure support can be saved.
In addition, reducing dead load is conducive to prefabricated assembled construction, speed of application is further speeded up.In addition, this implementation
Example eliminates the stretching process of the processing of web regular reinforcement, binding and prestressing tendon, can significantly shorten the construction period, reduction is constructed into
This.
Claims (10)
1. a kind of medium-and low-speed maglev traffic combination beam element, the composite beams are U-shaped structure comprising armored concrete knot
The lower wing plate of structure（5）With two pieces of upper flanges（2）, the lower wing plate（5）With two pieces of upper flanges（2）Between be installed with web, it is special
Sign is that the web is the Wavelike steel webplate for curving setback shape（3）, the Wavelike steel webplate（3）It is mutually interconnected including polylith
The straight panel section connect（31）And tilted plate section（32）, the straight panel section（31）Bridge is indulged to arrangement in edge.
2. medium-and low-speed maglev traffic combination beam element according to claim 1, which is characterized in that the straight panel section（31）'s
Length a and tilted plate section（32）Length b it is equal, and the Wavelike steel webplate（3）Wavelength X be 1000mm, 1200mm or
1600mm, the Wavelike steel webplate（3）Thickness be 12-28mm.
3. medium-and low-speed maglev traffic combination beam element according to claim 1, which is characterized in that the Wavelike steel webplate
（3）In bridge Dun（10）Bearing（9）Place is provided with inner lining concrete（4）, the inner lining concrete（4）With Wavelike steel webplate（3）
Between be equipped with weldering nail connector（11）, and the inner lining concrete（4）Length d be not less than the medium-and low-speed maglev traffic combination
Beam element height h.
4. medium-and low-speed maglev traffic combination beam element according to any one of claim 1-3, which is characterized in that on described
Wing plate（2）Two sides and bottom be both provided with by one piece of steel plate punched form or three blocks of steel plates be welded to each other made of upper outsourcing
Steel plate（29）, the Wavelike steel webplate（3）Upper end be fixed in the upper encased steel plate（29）On；The lower wing plate（5）Bottom
Edge both sides are also equipped with lower encased steel plate（33）, the Wavelike steel webplate（3）Lower end be fixed in the lower encased steel plate（33）
On.
5. medium-and low-speed maglev traffic combination beam element according to any one of claim 1-3, which is characterized in that under described
Wing plate（5）It is interior to be equipped with bellows（61）, the bellows（61）It is interior to be equipped with longitudinal prestressing steel beam（6）, the longitudinal prestressing
Steel beam（6）For the parabolic shape to the composite beams center that is open.
6. a kind of medium-and low-speed maglev traffic combination beam, which is characterized in that including two as described in any one of claim 1-5
Medium-and low-speed maglev traffic combination beam element, two medium-and low-speed maglev traffic combination beam elements are arranged side by side along bridge width direction
Arrangement, and positioned at the upper flange of inside（2）Height than the upper flange positioned at outside（2）The high 300-400mm of height.
7. a kind of medium-and low-speed maglev traffic combination beam, which is characterized in that including two as described in any one of claim 1-5
Medium-and low-speed maglev traffic combination beam element, two medium-and low-speed maglev traffic combination beam elements are arranged side by side along bridge width direction
Arrangement, and the adjacent medium-and low-speed maglev traffic combination beam element shares the same Wavelike steel webplate（3）With same upper flange
（2）, it is located at the upper flange of inside（2）Height than the upper flange positioned at outside（2）The high 300-400mm of height.
8. a kind of medium-and low-speed maglev traffic combination beam orbit system, which is characterized in that including any one of multiple claim 1-5
Medium-and low-speed maglev traffic combination beam described in the medium-and low-speed maglev traffic combination beam element or at least one claim 6
Or the medium-and low-speed maglev traffic combination beam described at least one claim 7, the medium-and low-speed maglev traffic combination beam element
Or track is equipped in the U-shaped channel of medium-and low-speed maglev combination beam（18）, the section of track（12）, for electric installation（7）With communication device
（8）, the track（18）To be buckled in the lower wing plate（5）On U-shaped steel tendon concrete structure, the section of track（12）It is fixed
In the track（18）On, it is described for electric installation（7）With communication device（8）It is fixedly arranged on the Wavelike steel webplate（3）It is interior
Surface.
9. medium-and low-speed maglev traffic combination beam orbit system according to claim 8, which is characterized in that the track
（18）With the section of track（12）Between be equipped with strong concrete block（16）, the section of track（12）With strong concrete block（16）Between
Equipped with for finely tuning the section of track（12）The billet of elevation（40）With electro-insulating rubber pad（41）.
10. a kind of construction method of medium-and low-speed maglev traffic combination beam element, which is characterized in that include the following steps：
（1）Tie with reinforcing bar is carried out on pedestal, and in lower wing plate（5）Framework of steel reinforcement in arrange bellows（61）；
（2）By Wavelike steel webplate（3）, upper encased steel plate（29）With lower encased steel plate（33）Installation is in place, installs composite beams
Side Template and inner lining concrete（4）Side template；
（3）Pour upper flange（2）With lower wing plate（5）Concrete and inner lining concrete（4）, scene maintenance to concrete strength
Reach 90% or more design value；
（4）Remove Side Template, tensioning longitudinal prestressing steel beam（6）, completed using C50 non-shrinkage concrete sealing off and covering anchorages low among the above
The construction of fast magnetic floating traffic composite beams.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810123042.2A CN108374316A (en) | 2018-02-07 | 2018-02-07 | Medium-and low-speed maglev traffic combination beam element, medium-and low-speed maglev traffic combination beam, rail system and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810123042.2A CN108374316A (en) | 2018-02-07 | 2018-02-07 | Medium-and low-speed maglev traffic combination beam element, medium-and low-speed maglev traffic combination beam, rail system and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108374316A true CN108374316A (en) | 2018-08-07 |
Family
ID=63017632
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810123042.2A Pending CN108374316A (en) | 2018-02-07 | 2018-02-07 | Medium-and low-speed maglev traffic combination beam element, medium-and low-speed maglev traffic combination beam, rail system and construction method |
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| CN109024109A (en) * | 2018-09-28 | 2018-12-18 | 中铁磁浮交通投资建设有限公司 | The multiple degrees of freedom support of medium-and low-speed maglev bridge big displacement modularization telescopic device |
| CN110029540A (en) * | 2019-03-26 | 2019-07-19 | 中铁磁浮交通投资建设有限公司 | A kind of high speed Maglev double line box girder and track structure |
| CN112792438A (en) * | 2020-12-29 | 2021-05-14 | 上海科轻起重机有限公司 | Automatic welding machine for magnetic suspension installation angle steel of heavy equipment box type beam web |
| CN113957755A (en) * | 2021-09-24 | 2022-01-21 | 中铁二院工程集团有限责任公司 | Medium-low speed magnetic levitation traffic combined U-shaped beam structure |
| CN114232462A (en) * | 2021-12-29 | 2022-03-25 | 哈尔滨工业大学 | Urban rail transit corrugated steel-concrete U-shaped combination beam and construction method thereof |
| CN114856082A (en) * | 2022-06-14 | 2022-08-05 | 江苏华江祥瑞现代建筑发展有限公司 | Assembled prestressed composite web composite beam |
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| CN114856082A (en) * | 2022-06-14 | 2022-08-05 | 江苏华江祥瑞现代建筑发展有限公司 | Assembled prestressed composite web composite beam |
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Effective date of registration: 20190123 Address after: 410008 No. 158, Second Section of Furong North Road, Changsha City, Hunan Province Applicant after: Hunan Traffic Planning Survey and Design Institute Co Ltd Applicant after: Hunan Maglev Technology Research Center Co., Ltd. Address before: 410008 No. 158, Second Section of Furong North Road, Changsha City, Hunan Province Applicant before: Hunan Traffic Planning Survey and Design Institute Co Ltd |