CN207300716U - One kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast - Google Patents
One kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast Download PDFInfo
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- CN207300716U CN207300716U CN201721165784.9U CN201721165784U CN207300716U CN 207300716 U CN207300716 U CN 207300716U CN 201721165784 U CN201721165784 U CN 201721165784U CN 207300716 U CN207300716 U CN 207300716U
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Abstract
The utility model is related to one kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, including test structure, loading system and test system；The test structure includes cross bridge floor board part prototype, pave-load layer, 5 sleepers, fastener, railway ballast, 2 rail and 2 load-sharing girders；2 load-sharing girders are respectively symmetrically positioned on 2 rail；Loading system is acted on 2 load-sharing girders；Several foil gauges and several displacement meters are arranged symmetrically along the center line of the cross bridge floor board part prototype, test system carries out data acquisition and processing (DAP) to the measurement data of the foil gauge and displacement meter.The utility model is directed to the distinctive construction features of railway ballast deck paving, with regard to railway ballast to the vertical puncture fatigue effect mated formation, devises effective testing program and is verified.
Description
Technical field
The utility model is related to one kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast.
Background technology
By analyzing domestic main paving steel bridge deck achievement in research, from the material angle of selection, China railways bridge
Face protection system of mating formation is mainly the following：Concrete protection system, it is combined big that its application is represented as the emerging continent of Wuhan Tian
Bridge and Nanjing Foundations of Dashengguan Changjiang River Bridge；Epoxy asphalt concrete railway deck protection system, its application are represented as the new Gan Jiangte in east
Bridge；Pouring asphalt concrete railway deck protection body, its application are represented as Tongling non-major P.E.subject.Business closes Hang Tielu
Wuhu the Changjiang river rail-road bridge is intended using " cold mixing retinasphal concrete (RA)+retinasphal tack coat through investigation and theory analysis
The railway deck of+epoxy bonds metalling (EBCL)+Steel Bridge Deck " is mated formation form, and abbreviation ER mats formation.ER mats formation main raw material(s) ring
Oxygen tree fat etc. is macromolecule chemical material, its EBCL epoxy bonds metalling can effectively solve the problems, such as pavement layer shear；Using cold
Retinasphal mixture is mixed, high temperature resistant, water-fast damage, fatigue performance are good, but due to being subject to severe natural environment and operation bar
The influence of part, often cracking in actual operation, phenomena such as heaving, coming off.The highway that compares is mated formation, and railway is mated formation by railway ballast
Protection, radiation, rain erosion from sunlight etc., and railway deck due to stress suffered by the diffusion of railway ballast it is smaller, iron
Road deck paving service life should be higher than that highway bridge is mated formation.
Though having the application that railway deck is mated formation both at home and abroad, verified without effective test method or device
The fatigue behaviour of the resistance to railway ballast fatigue of tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving, is applied to have on tiny fragments of stone, coal, etc. railway for steel bridge flexibility deck paving
Theory support is provided.
Utility model content
To solve the above problems, there is the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving resistance to the purpose of this utility model is to provide one kind
Railway ballast fatigue experimental device, has tiny fragments of stone, coal, etc. railway deck to mat formation to carry out material and mechanical property test and structural verification test to new
Provide effective way.
The purpose of this utility model is achieved through the following technical solutions：
One kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, including test structure, loading system
With test system；
The test structure includes cross bridge floor board part prototype, pave-load layer, 5 sleepers, fastener, railway ballast, 2
Bar rail and 2 load-sharing girders；
Pave-load layer is equipped with above the cross bridge floor board part prototype；2 rail and fastener are by phase
Adjacent 5 sleepers connection is integral, and is arranged above pave-load layer；It is filled between the sleeper and pave-load layer, between sleeper
Railway ballast；2 load-sharing girders are respectively symmetrically positioned on 2 rail；
Loading system is acted on 2 load-sharing girders；
Several foil gauges and several have been arranged symmetrically along the center line of the cross bridge floor board part prototype
Displacement meter, test system carry out data acquisition and processing (DAP) to the measurement data of the foil gauge and displacement meter.
Further, the railway ballast thickness is 35cm, and the railway ballast both sides are closed using railway ballast baffle.
Further, the pave-load layer is mated formation form for ER, and thickness 3.3cm, mat formation area 3.5m × 2.8m.
Further, the rail and fastener use specification for the heavy haul railway rail of 75kg/m and with hitch
Part.
Further, the sleeper is high-speed railway heavy track type III concrete sleeper, and sleeper spacing is 0.6m.
Further, the loading system uses 50t loading testers, and loading frequency is between 2~4Hz.
The beneficial effects of the utility model are：
The utility model is directed to the distinctive construction features of railway ballast deck paving, tired to the vertically puncture mated formation with regard to railway ballast
Work is used, and design experiment scheme is verified.The central inventive point of the utility model is specimen Design and loading device design
On.By using cross bridge floor board prototype, effectively simulate under the vertical ringing of bullet train wheel shaft, verify
Whether bridge deck pavement there is local crowning, depression, abrasion, puncture and crushes.And experiment is found：Used in bullet train axis recast
Under, ER mats formation with preferable being folded without breaking fatigue properties.
Brief description of the drawings
Fig. 1 is the structure diagram of Sample devices described in the utility model；
Fig. 2 is the sectional view of cross bridge floor board part prototype described in the utility model；
Fig. 3 is the side view of cross bridge floor board part prototype described in the utility model；
Fig. 4 is the plan of cross bridge floor board part prototype described in the utility model；
Fig. 5 is cross bridge floor board part prototype upper stress point layout figure described in the utility model；
Fig. 6 cross bridge floor board part prototype top offset point layout figures described in the utility model；
Wherein, 1- cross bridge floor boards part prototype, 2- sleepers, 3- load-sharing girders, 4- rail, 5- load tests
Machine, 6- railway ballasts.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, is not used to limit the utility model.
As shown in Figure 1, the utility model, which provides one kind, the resistance to railway ballast fatigue test dress of tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving
Put, including test structure, loading system and test system.
The test structure includes cross bridge floor board part prototype 1, pave-load layer, 5 sleepers 2, fastener, railway ballast
6th, 2 rail 4 and 2 load-sharing girders 3.
The top of cross bridge floor board part prototype 1 is equipped with pave-load layer；2 rail 4 and fastener will
Adjacent 5 sleepers 2 connect integral, and are arranged above pave-load layer；Filled out between the sleeper 2 and pave-load layer, between sleeper 2
Filled with railway ballast 6；2 load-sharing girders 3 are respectively symmetrically positioned on 2 rail 4.
Loading system is acted on 2 load-sharing girders 3, i.e., train axis heavy load is acted on load-sharing girder 3.
As shown in Figure 5,6, being arranged symmetrically several along the center line of the cross bridge floor board part prototype 1 should
Become piece and several displacement meters, test system carries out data acquisition and processing (DAP) to the measurement data of the foil gauge and displacement meter.
6 thickness of railway ballast is 35cm, and 6 both sides of railway ballast are closed using railway ballast baffle.The setting of railway ballast baffle avoids
Beam-ends and the generation of railway ballast relative displacement, thus greatly reduce railway ballast to the attrition mated formation.
The pave-load layer is mated formation form for ER, i.e., using " 30mm cold mixing retinasphal concrete (RA)+retinasphal bonds
Layer (0.4-0.6kg/m3)+epoxy bonds metalling (EBCL) (0.9-1.1kg/m3The railway deck of)+Steel Bridge Deck " is mated formation form,
Wherein described Steel Bridge Deck uses derusting by sandblasting (Sa2.5, roughness reach Rz80~100 μm).The ER pavement thicknesses are
3.3cm, mat formation area 3.5m × 2.8m.
The rail 4 and fastener use heavy haul railway rail and supporting fastener of the specification for 75kg/m.
The sleeper 2 is high-speed railway heavy track type III concrete sleeper, and sleeper spacing is 0.6m.5 sleepers are along two
The longitudinally asymmetric distribution of crossbeam span centre.
The loading system uses 50t loading testers 5, and loading frequency is between 2~4Hz.
In the present embodiment, segment steel box-girder finite element model and experiment test specimen finite element model are established respectively, are added identical
Position is carried, under conditions of identical load value, analyzes its stress：Relative displacement and local stress distribution.Adjustment Tests try
Part finite element model, makes the stress of experiment test specimen finite element model and the stress base of segment steel box-girder finite element model
This is consistent.
In the cross bridge floor board part prototype：Bridge floor plate thickness is 16mm；Closed U-shaped rib size 300mm
× 300mm × 8mm, U-shaped rib spacing 600mm.Two inverted T shaped big longerons, web high 722mm, thick 16mm, the wide 300mm of bottom wing are thick
16mm.Cross bridge floor board part prototype the overall height 1.032m, length 3.658m, width 3.000m.
Deck paving fatigue loading scheme is as follows：According to bullet train axis weight 170kN, consider impact coefficient 1.5, add
Testing machine output load lower limit 10kN, load upper limit 255kN are carried, removing railway ballast after loading 2,000,000 times checks pave-load layer appearance shape
State.Railway ballast is loaded again, and assembling sleeper, rail and fastener and load-sharing girder, keep identical load to export, continue loading 300
Ten thousand times.Load 5,000,000 times altogether.
In order to grasp the accuracy of the stress of test specimen and loading, static test is carried out first, using multistage loadings
Mode, every grade of load 5t, adds to 30t.Due to being loaded in span centre, two crossbeam span centre position stress and vertical displacement are maximum, to across
The stress of middle position and vertical displacement measure.Data are carried out using Japanese republicanism UCAM-60B static data acquisition systems to adopt
Collection and processing.Foil gauge and displacement meter are arranged symmetrically along the center line of cross bridge floor board part prototype, and load is pair
Claim load, test the stress for obtaining symmetric position and displacement is basically identical, therefore loading device and loading method are effectively reliable
's.
Fatigue test, before being loaded into 2,000,000 times, carries out a static test every 500,000 times, grasps mould during experiment
The mechanical state situation of change of type.Additionally due to railway ballast is discrete bodies, with the increase of loading number, railway ballast state may be sent out
Changing, causes the displacement of sleeper to change, therefore the vertical displacement during experiment to sleeper comes card numeral by new
Spirit level measures, equally every 500,000 measurements once.Do not load, load 1,000,000 times, load 2,000,000 times, loading 350
Ten thousand times, after loading 5,000,000 times, carry out stress and displacement that static test measures each measuring point respectively.Test result indicates that in load
Under effect, test the stress for obtaining symmetric position and displacement is basically identical.After different fatigue loading number, the stress of each measuring point
Linearly increased with displacement with the increase of load；Under identical load, the stress of each measuring point and displacement are held essentially constant, paving
Fill layer and track structure stability is preferable.Known according to measurement result, with the increase of loading number, both sides displacement of sleepers does not have substantially
Change, illustrate that railway ballast state change is little.
After loading 5,000,000 times, the effect of railway ballast produces pave-load layer obvious destruction, does not occur apparent office
Portion is raised, is recessed, wears, pierces through and crushes.
The utility model determines orthotropic deck according to Wuhu Er Qiao railway decks design drawing and finite element analysis
The stress of plate prototype, experimental result and finite element model is basically identical.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (6)
1. one kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, it is characterised in that including test structure,
Loading system and test system；
The test structure includes cross bridge floor board part prototype (1), pave-load layer, 5 sleepers (2), fastener, railway ballast
(6), 2 rail (4) and 2 load-sharing girders (3)；
Pave-load layer is equipped with above the cross bridge floor board part prototype (1)；2 rail (4) and fastener will
Adjacent 5 sleepers (2) connection is integral, and is arranged above pave-load layer；The sleeper (2) is between pave-load layer, sleeper (2) it
Between be filled with railway ballast (6)；2 load-sharing girders (3) are respectively symmetrically positioned on 2 rail (4)；
Loading system is acted on 2 load-sharing girders (3)；
Several foil gauges and several positions have been arranged symmetrically along the center line of the cross bridge floor board part prototype (1)
Meter is moved, test system carries out data acquisition and processing (DAP) to the measurement data of the foil gauge and displacement meter.
2. according to claim 1 have the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, its feature exists
In railway ballast (6) thickness is 35cm, and railway ballast (6) both sides are closed using railway ballast baffle.
3. according to claim 1 have the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, its feature exists
Mat formation form for ER in, the pave-load layer, thickness 3.3cm, mat formation area 3.5m × 2.8m.
4. according to claim 1 have the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, its feature exists
Heavy haul railway rail and supporting fastener of the specification for 75kg/m are used in, the rail (4) and fastener.
5. according to claim 1 have the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, its feature exists
In the sleeper (2) is high-speed railway heavy track type III concrete sleeper, and sleeper spacing is 0.6m.
6. according to claim 1 have the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast, its feature exists
In the loading system uses 50t loading testers (5), and loading frequency is between 2~4Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721165784.9U CN207300716U (en) | 2017-09-12 | 2017-09-12 | One kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721165784.9U CN207300716U (en) | 2017-09-12 | 2017-09-12 | One kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast |
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| Publication Number | Publication Date |
|---|---|
| CN207300716U true CN207300716U (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721165784.9U Active CN207300716U (en) | 2017-09-12 | 2017-09-12 | One kind has the tiny fragments of stone, coal, etc. railway steel bridge flexibility deck paving fatigue experimental device of resistance to railway ballast |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295508A (en) * | 2021-12-30 | 2022-04-08 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for evaluating wear performance of railway fastener base plate material and structure on sleeper |
-
2017
- 2017-09-12 CN CN201721165784.9U patent/CN207300716U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295508A (en) * | 2021-12-30 | 2022-04-08 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for evaluating wear performance of railway fastener base plate material and structure on sleeper |
| CN114295508B (en) * | 2021-12-30 | 2023-07-18 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for evaluating abrasion performance of railway fastener backing plate material and structure on sleeper respectively |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee after: CARS RAILWAY ENGINEERING Research Institute Patentee after: CHINA ACADEMY OF RAILWAY SCIENCES Corp.,Ltd. Address before: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee before: CHINA ACADEMY OF RAILWAY SCIENCES RAILWAY ENGINEERING Research Institute Patentee before: CHINA ACADEMY OF RAILWAY SCIENCES |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210713 Address after: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee after: CARS RAILWAY ENGINEERING Research Institute Patentee after: CHINA ACADEMY OF RAILWAY SCIENCES Corp.,Ltd. Patentee after: Beijing Fuzhou passenger dedicated line Anhui Co.,Ltd. Address before: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee before: CARS RAILWAY ENGINEERING Research Institute Patentee before: CHINA ACADEMY OF RAILWAY SCIENCES Corp.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211210 Address after: 230000 Fangda Ying complex building, No. 525 Qianshan Road, Shushan District, Hefei City, Anhui Province Patentee after: Beijing Fuzhou passenger dedicated line Anhui Co.,Ltd. Address before: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee before: CARS RAILWAY ENGINEERING Research Institute Patentee before: CHINA ACADEMY OF RAILWAY SCIENCES Corp.,Ltd. Patentee before: Beijing Fuzhou passenger dedicated line Anhui Co.,Ltd. |
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| TR01 | Transfer of patent right |