CN202688857U - Steel-concrete combined trussed beam - Google Patents
Steel-concrete combined trussed beam Download PDFInfo
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- CN202688857U CN202688857U CN 201220242986 CN201220242986U CN202688857U CN 202688857 U CN202688857 U CN 202688857U CN 201220242986 CN201220242986 CN 201220242986 CN 201220242986 U CN201220242986 U CN 201220242986U CN 202688857 U CN202688857 U CN 202688857U
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Abstract
The utility model relates to a steel-concrete combined trussed beam. Buildings including highways, railways and like are often required to be spanned in railway projects. Due to the control of factors including overpass clearance, tunnel geology, station elevation and the like, the building height of a bridge directly influences the length of the bridge and safety and economical efficiency of relevant projects, and an overpass bridge need adopt a structure with large span and low building height. The steel-concrete combined trussed beam is provided with two parallel concrete upper chords which are connected through a cross arm. A concrete lower chord with two upward-folded ends is arranged under the concrete upper chords, and a plurality of obliquely-arranged steel web rods are arranged between folded bosses at two ends of the concrete lower chord and the two corresponding concrete upper chords. The steel-concrete combined trussed beam is low in building height, large in rigidity, good in driving power performance, low in construction cost, small in maintenance work amount, superior in system durability and capable of conveniently meeting the requirements of ballastless tracks.
Description
Technical field
The utility model belongs to the bridge construction technical field of buildings, is specifically related to a kind of steel-concrete combination trusses.
Background technology
New railway project often need to be crossed over the structure such as existing highway, railway, owing to be subjected to the control of the factors such as grade separation headroom, tunnel geology, station absolute altitude, the building height of bridge directly affects the length of access bridge and safety and the economy of correlation engineering, so the grade separation bridge must adopt the form of structure that span is large, building height is low.And simultaneously from the Bridge Landscape angle, lower building height can increase the penetrating sense of bridge, significantly improves the landscape effect of bridge.
Summary of the invention
The purpose of this utility model provides and a kind ofly is applicable to the bridge construction that span is large, building height is low and has the preferably steel-concrete combination trusses of structural static and dynamic characteristics.
The technical scheme that the utility model adopts is:
A kind of steel-concrete combination trusses is characterized in that:
Described combination trusses is provided with two parallel concrete and winds up, and is connected by stull between two concrete wind up;
The below that described concrete winds up is provided with the concrete lower edge of upwards turning up at two ends, is provided with some tilting steel web members between two concrete that the boss that turn up at concrete lower edge two ends is corresponding with the top wind up.
Stull between described two concrete wind up is winded up vertical with two concrete.
In the stull between described two concrete wind up, the stull sectional area that is positioned at the end is larger.
Described steel web member concrete wind up and the concrete lower edge between the end adjacent, form a plurality of herringbone beam's structures.
The utlity model has following advantage:
1) building height is low:
Compare with bowstring arch bridge, steel truss girder bridge, building height can reduce 1.5-2.0m, has fairly obvious advantage.
2) rigidity is large, and the driving power performance is good:
Compare with steel truss girder, because upper and lower chord member adopts concrete structure, the rigidity of structure obviously strengthens than steel truss girder.
3) construction costs is low, and the maintenance workload is little, the system superior durability:
Because only web member adopts the steel member, thus steel using amount and the maintenance workload significantly reduces, construction costs obviously reduces, compare with bowstring arch bridge simultaneously, owing to there is not flexible suspension rod, the Synthesis durability of structure strengthens greatly.
4) can adapt to easily the non-fragment orbit requirement:
This structure lower chord is concrete structure, can adapt to easily ballastless track structure, all technical problems of having avoided steel bridge to lay non-fragment orbit.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model cross section structure schematic diagram.
Among the figure, the 1-concrete winds up, 2-steel web member, and 3-concrete lower edge, 4-holds stull, 5-stull.
The specific embodiment
Below in conjunction with the specific embodiment the utility model is described in detail.
A kind of steel-concrete combination trusses that the utility model relates to is provided with two parallel concrete, 1, two concrete that winds up and winds up and connected by stull 5 between 1, and it is 1 vertical that stull 5 and two concrete wind up, and stull 5 sectional areas that are positioned at the end are larger.Wind up 1 below of concrete is provided with the concrete lower edge 3 of upwards turning up at two ends, two concrete that the boss that turn up at concrete lower edge 3 two ends is corresponding with the top wind up and are provided with some tilting steel web members 2 between 1, steel web member 2 concrete wind up 1 and concrete lower edge 3 between the end adjacent, form a plurality of herringbone beam's structures.Wherein, it 1 is compressed member that concrete winds up, and adopts reinforced concrete structure; Concrete lower edge 3 is tensional element, adopts Pre-stress Concrete, directly bears live load of train; Steel web member 2 adopts the steel rod member for drawing-Strut Part.
The specific embodiment is: set up falsework → laying bed die → mounting tool → assembly unit web member 2 → installation end stull 4 and stull 5 → adjustment web member 2 positions → first prestressed strand → cast of fluid concrete lower edge 3 → stretch-draw wind up 1 concrete → stretch-draw second batch prestressed strand → dismounting soffit formwork and support → finish paint application.
Member all is welded at produce in factory, after completing, tries to piece together in factory, after precision meets the demands, is transported to the scene.Steel web member 2 first two spellings is dressed up " people " font, winches to the relevant position with crane, and two ends are drawn and established cable wind rope cooperation contraposition, regulate laterally with jack and vertically regulate, and control point, member center and axial location control point are coincided.For guaranteeing the stability of truss, fixedly behind lineup's word beam, should carry out successively cross binding and be connected connection with longitudinal bracing.At last truss is carried out accurate adjustment.
After girder truss checked, adjusts, just twist first high-strength bolt, just twist the hammering method inspection of complete high-strength bolt, and draw linear mark at bolt, nut, packing ring and member, be convenient to check have or not when twisting eventually to leak and twist and whether packing ring or bolt rotate.Twist eventually and adopt calibrated wrench method, torque wrench must be demarcated before using, its moment of torsion error must not greater than use torque value ± 5%.The first of high-strength bolt twists and twists eventually and should finish within same working day.
Structure master's muscle joint adopts flash welding or electroslag pressure welding to connect, and adopts tied silk to carry out colligation between main muscle and the stirrup.If having with bellows in process of binding, reinforcing bar collides, can suitable mobile reinforcing bar or bending, and should guarantee the requirement of Minimal Protective layer.
Concrete adopts the transportation of concrete transportation tank car, is pumped into mould, and placement layer by layer carries out continuously, and poker vibrator vibrates.The lower chord concrete is totally built order and is carried out to span centre from striding the two ends, footpath.Because the node connecting portion is chamfering, therefore in the gusset plate position, temporarily seal gusset plate one end, pump line directly adopts the conduit spreading, and horizontal access node plate below pumping of concrete is from inside to outside routed up concrete, fills full to guarantee the gusset plate inner concrete.
Concrete after the form removal uses the non-woven geotextile of heat and moisture preserving to cover immediately, and outer subsides water proof plastic sheeting uses automatic water sprinkler systme and sprayer maintenance, after curing time is no less than 7d, remove health preserving blanket, closely cover with plastic sheeting again, more than the moisture-keeping maintaining 14d.
Prestressed strand stretch-draw must reach 90% by concrete strength, and concrete curing is not less than 10 days and can carries out the length of time.Tension sequence is pressed sequence of construction from outside to inside, and bilateral symmetry is carried out.After stretch-draw is finished, at 24 hours with the interior pipeline pneumatic mortar that carries out.
Claims (4)
1. a steel-concrete makes up trusses, it is characterized in that:
Described combination trusses is provided with two parallel concrete and winds up (1), and two concrete wind up and connected by stull (5) between (1);
The wind up below of (1) of described concrete is provided with the concrete lower edge (3) of upwards turning up at two ends, and boss two concrete corresponding with the top that turn up at concrete lower edge (3) two ends wind up and are provided with some tilting steel web members (2) between (1).
2. a kind of steel-concrete according to claim 1 makes up trusses, it is characterized in that:
Described two concrete wind up stull (5) and two concrete between (1) wind up (1) vertical.
3. a kind of steel-concrete according to claim 1 and 2 makes up trusses, it is characterized in that:
Described two concrete wind up in the stull (5) between (1), and stull (5) sectional area that is positioned at the end is larger.
4. a kind of steel-concrete according to claim 3 makes up trusses, it is characterized in that:
Described steel web member (2) wind up at concrete (1) and concrete lower edge (3) between the end adjacent, form a plurality of herringbone beam's structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242986 CN202688857U (en) | 2012-05-28 | 2012-05-28 | Steel-concrete combined trussed beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242986 CN202688857U (en) | 2012-05-28 | 2012-05-28 | Steel-concrete combined trussed beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202688857U true CN202688857U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220242986 Expired - Lifetime CN202688857U (en) | 2012-05-28 | 2012-05-28 | Steel-concrete combined trussed beam |
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| CN (1) | CN202688857U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452038A (en) * | 2013-08-15 | 2013-12-18 | 龙口丛林中德车体系统工程有限公司 | Transition connection device for aluminum alloy pedestrian bridge |
| CN109537473A (en) * | 2018-12-11 | 2019-03-29 | 佛山科学技术学院 | A kind of large span truss bridge cantilever dress temporary reinforcing device |
| CN113503040A (en) * | 2021-08-16 | 2021-10-15 | 上海城建建设实业集团新型建筑材料嘉兴有限公司 | Embedded type lower chord herringbone frame rib plate assembling type double T plate construction method |
| CN113550427A (en) * | 2021-08-16 | 2021-10-26 | 上海城建建设实业集团新型建筑材料丽水有限公司 | Web member assembly type truss of outer wrapping type lower chord member propeller strut |
| CN113668356A (en) * | 2021-08-30 | 2021-11-19 | 广东省铁路规划设计研究院有限公司 | Tank-box mixed beam and application thereof |
| CN114108493A (en) * | 2021-12-23 | 2022-03-01 | 中铁六局集团天津铁路建设有限公司 | Quick construction method for steel-concrete combined truss girder |
-
2012
- 2012-05-28 CN CN 201220242986 patent/CN202688857U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452038A (en) * | 2013-08-15 | 2013-12-18 | 龙口丛林中德车体系统工程有限公司 | Transition connection device for aluminum alloy pedestrian bridge |
| CN103452038B (en) * | 2013-08-15 | 2016-02-10 | 龙口丛林中德车体系统工程有限公司 | A kind of transition connection device for aluminum alloy pedestrian bridge |
| CN109537473A (en) * | 2018-12-11 | 2019-03-29 | 佛山科学技术学院 | A kind of large span truss bridge cantilever dress temporary reinforcing device |
| CN113503040A (en) * | 2021-08-16 | 2021-10-15 | 上海城建建设实业集团新型建筑材料嘉兴有限公司 | Embedded type lower chord herringbone frame rib plate assembling type double T plate construction method |
| CN113550427A (en) * | 2021-08-16 | 2021-10-26 | 上海城建建设实业集团新型建筑材料丽水有限公司 | Web member assembly type truss of outer wrapping type lower chord member propeller strut |
| CN113503040B (en) * | 2021-08-16 | 2023-09-29 | 上海城建建设实业集团新型建筑材料嘉兴有限公司 | Embedded lower chord herringbone frame rib plate assembly type double-T plate construction method |
| CN113668356A (en) * | 2021-08-30 | 2021-11-19 | 广东省铁路规划设计研究院有限公司 | Tank-box mixed beam and application thereof |
| CN114108493A (en) * | 2021-12-23 | 2022-03-01 | 中铁六局集团天津铁路建设有限公司 | Quick construction method for steel-concrete combined truss girder |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |