CN203295977U - Distribution structure for jointless tracks of open bridge floor - Google Patents
Distribution structure for jointless tracks of open bridge floor Download PDFInfo
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- CN203295977U CN203295977U CN201320289619XU CN201320289619U CN203295977U CN 203295977 U CN203295977 U CN 203295977U CN 201320289619X U CN201320289619X U CN 201320289619XU CN 201320289619 U CN201320289619 U CN 201320289619U CN 203295977 U CN203295977 U CN 203295977U
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- rail
- resistance
- open bridge
- gapless track
- bridge
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Abstract
The utility model particularly relates to a distribution structure for jointless tracks of an open bridge floor. One-way rail telescopic adjusting devices are arranged at expansion joint positions between all continuous beams of the open bridge floor, large-resistance buckles are laid at the two ends of each one-way rail telescopic adjusting device to form fixed areas of the jointless tracks, small-resistance buckles and ultrasmall-resistance buckles are combined and laid at the beam ends of the continuous beams close to concrete approach bridges to form telescopic areas of the jointless tracks, and normal-resistance buckles are arranged on the concrete approach bridges at the two ends of the continuous beams of the open bridge floor. The distribution structure has the advantages that a plurality of groups of the rail telescopic adjusting devices arranged on the open bridge floor can effectively reduce longitudinal force of the jointless tracks on long rails of the open bridge floor, the large-resistance buckles are laid at the two ends of each one-way rail telescopic adjusting device to form the fixed areas of the jointless tracks so as to reinforce rail locking, and meanwhile the small-resistance buckles are laid close to the concrete approach bridges to form the telescopic areas of the jointless tracks so as to reduce mutual action force of the beams and the rails.
Description
Technical field
The utility model relates to gapless track, is specifically related to a kind of arrangement of open bridge floors gapless track.
Background technology
On bridge, gapless track is a kind of special shape of gapless track, specifically refers to be laid on the gapless track on bridge.China was since 1963, successively at the upper gapless track of laying of the polytype bridge of some medium and small spans (simply supported beam, continuous beam, trusses, quarrel is arranged without the quarrel bridge), and the interactional principle of gapless track beam rail on bridge is carried out a large amount of experimental studies, related to gapless track longitudinal force action rule on the polytype bridge, and the impact of the many factors such as bridge pier top displacement (high pier), and set up Computing Principle and the computational methods of the flexible additional force of gapless track, deflection additional force on the bridge, lay gapless track for China and lay a good foundation on bridge.
On bridge, gapless track except the effect that is subject to DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES, TEMPERATURE FORCE, brake force etc., also is subject to the beam rail interaction force due to the flexible of bridge or deflection deformation generation---vertical additional force.Additional longitudinal force has increased rail stress, and reacts on bridge, and by function served as bridge in pier.In addition, seamless track steel rail on bridge, in case fracture not only jeopardizes traffic safety, also will produce disconnected rail additional force, and by bridge span structure, act on pier.Therefore, during gapless track, be to guarantee safety on the design bridge, must consider under the synergy of above-mentioned various power, guarantee that rail, bridge span structure and pier meet strength condition, stable condition and rail section seam condition separately.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, a kind of arrangement of open bridge floors gapless track is provided, this arrangement arranges rail overlapping device by place, the shrinkage joint between each continuous beam of bridge, to reduce the longitudinal force of the long rail of open bridge floors gapless track, simultaneously by be used in combination the resistance fastener of Four types on gapless track, to reach in the locking of fixed area reinforcing rail and to reduce the purpose of beam rail interaction force at breathing zone.
The utility model purpose realizes being completed by following technical scheme:
a kind of arrangement of open bridge floors gapless track, relate to temperature span greater than the open bridge floors continuous beam of 100 meters, be layed in the long rail gapless track on described open bridge floors continuous beam, and the concrete access bridge that is arranged at described open bridge floors continuous beam two ends, it is characterized in that the place, shrinkage joint between each described continuous beam is provided with unidirectional rail overlapping device, lay large resistance fastener to form the fixed area of described gapless track at the two ends of described rail overlapping device, and make up laying small-resistant fastener and extra small resistance fastener at the continuous beam beam-ends place near described concrete access bridge to form the breathing zone of described gapless track, lay simultaneously normal resistance fastener on the concrete access bridge of the two ends of described open bridge floors continuous beam.
Described rail overlapping device consists of stock rail and the tongue that is arranged at described stock rail inboard, and described tongue is arranged along current of traffic.
The Resistance Value of described large resistance fastener adopts 11.8-12.5 kN/cm/ rails.
The Resistance Value of described small-resistant fastener adopts 5.4-6.8 kN/cm/ rails.
The Resistance Value of described extra small resistance fastener adopts 1.8-2.2 kN/cm/ rails.
Described normal resistance fastener is the elasticity separated rail fastening, and its Resistance Value adopts 10.2-10.8 kN/cm/ rails.
The utility model has the advantages that, 1. by place, the shrinkage joint between each continuous beam of bridge, rail overlapping device is set, can effectively reduce the longitudinal force of long rail gapless track on bridge, and after rail overlapping device is set, long rail on bridge shortens, beam rail interaction force weakens, simultaneously gapless track acts on TEMPERATURE FORCE on the part bridge pier of continuous beam close to zero, is conducive to protect the bridge pier under continuous beam; 2. lay large resistance fastener by the rail overlapping device two ends on open bridge floors and form fixed area,, with the locking of reinforcing rail, form breathing zone by in close concrete access bridge section, laying small-resistant fastener simultaneously, to reduce beam rail interaction force.
Description of drawings
Fig. 1 is the layout schematic diagram of rail overlapping device, fixed area and breathing zone in the utility model;
Fig. 2 is the elevational schematic view of open bridge floors continuous beam bridge in the utility model;
Fig. 3 is that the rail temperature of contrast scheme is tried hard to;
Fig. 4 is the beam rail displacement diagram of contrast scheme;
Fig. 5 is that rail temperature of the present utility model is tried hard to;
Fig. 6 is beam rail displacement diagram of the present utility model;
Fig. 7 is that the utility model scheme is examined the calculation table with the orbit strength of contrast scheme.
The specific embodiment
Feature of the present utility model and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1-7, in figure, mark 1-8 is respectively: breathing zone 1, fixed area 2, rail overlapping device 3, concrete access bridge 4, the first continuous beam 5, the second continuous beam 6, the 3rd continuous beam 7, bridge pier 8.
Embodiment: as shown in Figure 1, 2, the present embodiment is specifically related to the arrangement of gapless track on a kind of open bridge floors, specifically take certain Bridge Project as example, bridge is positioned at straight line location, its main bridge adopts (84+84) m+ (84+84) m+ (108+198+336+336+198+108) m continuous steel girder arranged in form, main bridge is open bridge floors, lay long rail gapless track thereon, the sleeper laying standard is 1680/km, Lay interval 430mm～560mm, the rail that is layed in simultaneously on sleeper adopts 60kg/m, U75V rail; The access bridge track structure of this main bridge is rest pad formula track.The train that moves on gapless track adopts the Type B vehicle, the heavy 140KN of design axle, and the design speed desired value is 100km/h.(namely 2. number freely movable bearing place) arranges one group of unidirectional rail overlapping device 3, place, the shrinkage joint between the second continuous beam 6 and the 3rd continuous beam 7 (namely 4. number freely movable bearing place) and one group of unidirectional rail overlapping device 3 is set and at the beam-ends of the 3rd continuous beam 7 close concrete access bridges 4, one group of unidirectional rail overlapping device 4 is set at the shrinkage joint between the first continuous beam 5 and the second continuous beam 6 place; On open bridge floors, the two ends of rail overlapping device 3 are fixed area 2, be equipped with large resistance fastener in fixed area 2, lock with reinforcing rail, beam-ends at the first continuous beam 5 close concrete access bridges 4 arranges breathing zone 1 simultaneously, lay small-resistant fastener and extra small resistance fastener in the interior combination of breathing zone 1, to reduce beam rail interaction force, and lay normal resistance fastener on the concrete access bridge 4 at pontic two ends.
Rail overlapping device 3 consists of stock rail and the tongue that is arranged at the stock rail inboard, tongue is arranged along current of traffic, the flexible range of the unidirectional rail overlapping device that state's iron and urban track traffic at present adopted is ± 500mm, and the shrinkage joint between the continuous beam on this bridge is ± 560mm, traditional rail overlapping device can not meet this requirement of engineering, therefore this bridge adopts the rail overlapping device 3 of 600mm stroke, the long 13.415m of the stock rail of this rail overlapping device 3, the long 8.8m of tongue, total length 15m.
Adopt altogether the resistance fastener of 4 types on the gapless track of this bridge, wherein the Resistance Value of extra small resistance fastener is 2 kN/cm/ rails; The small-resistant fastener Resistance Value is 6.8 kN/cm/ rails; Normal resistance fastener resistance value is 10.2 kN/cm/ rails; Large resistance fastener resistance value is 12.5 kN/cm/ rails.Above-mentioned extra small resistance fastener is subdivided into " pine " and reaches " tightly " state when work, cross over location, large shrinkage joint fastener and take " pine " state, moment of torsion 150 ~ 200N.m, break in this zone to prevent rail, the point of switch reaches 2.4m scope thereafter and takes " tightly " state, moment of torsion 400 ~ 500N.m, to guarantee rail fastening down.
For in outstanding the present embodiment scheme by rail overlapping device 3 being set and in conjunction with the beneficial effect of Four types resistance fastener, special employing is a pair of does Contrast on effect than scheme, this contrast scheme is specially: do not adopt rail overlapping device, full-bridge adopts small-resistant fastener, and the longitudinal resistance value of fastener is 6.8 kN/cm/ rails.
The rail temperature that is illustrated in figure 3 as this contrast scheme is tried hard to, and rail maximal dilation power is 1053.5kN(136.02 MPa), 6. number and 10. the two ends that appear at the 3rd continuous beam 7 are near number movable pier.6. number and 10. be illustrated in figure 4 as the beam rail displacement diagram of this contrast scheme, rail and bridge length travel relative shift jump value all appear at each bridge pier 8 places, and the two ends that maximum value appears at the 3rd continuous beam 7 are number movable pier place, are respectively 81.2mm and 121.5mm.
The rail temperature that is respectively as shown in Figure 5,6 the present embodiment scheme is tried hard to and beam rail displacement diagram, the rail stroke power at each place, shrinkage joint is reduced to 0, rail maximal dilation power also reduces to 295.3kN from the 1053.5kN of scheme one, combined stress 38.08MP, beam rail interaction force weakens greatly, beam rail relative displacement value also respectively from 81.2mm be down to 12mm, 121.5mm is down to 21.2mm.
Be illustrated in figure 7 as the present embodiment scheme and examine the calculation table with the orbit strength of contrast scheme, examine calculation by the orbit strength in the contrast scheme, intensity is resentful to designing requirement, simultaneously with reference to " railway bridges and culverts design fundamental norms " regulation (TB10002.1-2005), temperature span〉girder steel of 100 m, should rail overlapping device be set at the freely movable bearing beam-ends, therefore the contrast scheme does not meet the regulation requirement.
In the present embodiment scheme; place arranges 3 groups of rail overlapping devices 3 at main Surveillance of Continuous Beam movable end; can effectively reduce the longitudinal force of the long rail of gapless track on bridge; and after rail overlapping device 3 is set; on bridge, long rail shortening, beam rail interaction force weaken; on bridge gapless track 3. number act on continuous beam and 7. contractility, flexural force and the disconnected rail power of number bridge pier, close to zero, be conducive to protect bridge pier 8.Fixed area is arranged at open bridge floors rail overlapping device 3 two ends,, with the reinforcing rail locking, near concrete access bridge section 4, breathing zone is set, and lays small-resistant fastener, to reduce beam rail interaction force.After rail overlapping device 3 is set, by intensity, examine calculation, scheme meets design requirement.
Claims (6)
1. the arrangement of an open bridge floors gapless track, relate to temperature span greater than the open bridge floors continuous beam of 100 meters, be layed in the long rail gapless track on described open bridge floors continuous beam, and the concrete access bridge that is arranged at described open bridge floors continuous beam two ends, it is characterized in that the place, shrinkage joint between each described continuous beam is provided with unidirectional rail overlapping device, lay large resistance fastener to form the fixed area of described gapless track at the two ends of described rail overlapping device, and make up laying small-resistant fastener and extra small resistance fastener at the continuous beam beam-ends place near described concrete access bridge to form the breathing zone of described gapless track, lay simultaneously normal resistance fastener on the concrete access bridge of the two ends of described open bridge floors continuous beam.
2. the arrangement of a kind of open bridge floors gapless track according to claim 1, is characterized in that described rail overlapping device consists of stock rail and the tongue that is arranged at described stock rail inboard, and described tongue is arranged along current of traffic.
3. the arrangement of a kind of open bridge floors gapless track according to claim 1, is characterized in that the Resistance Value of described large resistance fastener adopts 11.8-12.5 kN/cm/ rails.
4. the arrangement of a kind of open bridge floors gapless track according to claim 1, is characterized in that the Resistance Value of described small-resistant fastener adopts 5.4-6.8 kN/cm/ rails.
5. the arrangement of a kind of open bridge floors gapless track according to claim 1, is characterized in that the Resistance Value of described extra small resistance fastener adopts 1.8-2.2 kN/cm/ rails.
6. the arrangement of a kind of open bridge floors gapless track according to claim 1, is characterized in that described normal resistance fastener is the elasticity separated rail fastening, and its Resistance Value adopts 10.2-10.8 kN/cm/ rails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320289619XU CN203295977U (en) | 2013-05-24 | 2013-05-24 | Distribution structure for jointless tracks of open bridge floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320289619XU CN203295977U (en) | 2013-05-24 | 2013-05-24 | Distribution structure for jointless tracks of open bridge floor |
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| CN203295977U true CN203295977U (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320289619XU Expired - Lifetime CN203295977U (en) | 2013-05-24 | 2013-05-24 | Distribution structure for jointless tracks of open bridge floor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236059A (en) * | 2020-01-15 | 2020-06-05 | 中铁十五局集团路桥建设有限公司 | Telescopic track mounting structure at beam seam of horizontal and vertical curve superposed section and adjusting method |
| CN111733694A (en) * | 2020-07-03 | 2020-10-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Beam-rail integrated telescopic device of long-span railway steel bridge and design method thereof |
-
2013
- 2013-05-24 CN CN201320289619XU patent/CN203295977U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236059A (en) * | 2020-01-15 | 2020-06-05 | 中铁十五局集团路桥建设有限公司 | Telescopic track mounting structure at beam seam of horizontal and vertical curve superposed section and adjusting method |
| CN111236059B (en) * | 2020-01-15 | 2021-06-01 | 中铁十五局集团路桥建设有限公司 | Telescopic track mounting structure at beam seam of horizontal and vertical curve superposed section and adjusting method |
| CN111733694A (en) * | 2020-07-03 | 2020-10-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Beam-rail integrated telescopic device of long-span railway steel bridge and design method thereof |
| CN111733694B (en) * | 2020-07-03 | 2022-04-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Beam-rail integrated telescopic device of long-span railway steel bridge and design method thereof |
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| 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: 20131120 |