CN105160186A - Quality evaluation method for ballast track bed of high-speed rail - Google Patents
Quality evaluation method for ballast track bed of high-speed rail Download PDFInfo
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- CN105160186A CN105160186A CN201510586134.0A CN201510586134A CN105160186A CN 105160186 A CN105160186 A CN 105160186A CN 201510586134 A CN201510586134 A CN 201510586134A CN 105160186 A CN105160186 A CN 105160186A
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Abstract
The invention relates to a quality evaluation method for a ballast track bed of a high-speed rail. According to the evaluation method, track bed lateral resistance, underbed bearing stiffness and vertical resilient displacement percentage of the ballast track bed are taken as quality evaluation indexes of the ballast track bed, when the ballast track bed is initially stabilized, the track bed lateral resistance is more than or equal to 12kN/pillow, the underbed bearing stiffness is more than or equal to 120kN/pillow, and the vertical resilient displacement percentage of the ballast track bed is more than or equal to 60%. By the evaluation method, the research deficiency of the quality evaluation method for the ballast track bed of the high-speed rail can be made up, the evaluation index having representativeness and comprehensiveness and a reasonable quantity value thereof are sought through systematic and deep research, and the evaluation technical system for the ballast track bed of the high-speed rail in China is improved.
Description
Technical field
The present invention relates to the quality evaluating method of railway construction design field, particularly relating to a kind of high-speed railway has tiny fragments of stone, coal, etc. railway roadbed quality evaluating method.
Background technology
Railway is a kind of public transport mode of applicable China's actual conditions, it promotes China's economic, society and cultural development.High-speed railway refers to that newly built railway passenger train design the highest train speed reaches 250km/h and above railway, or the highest overall trip speed of existing line transformation train reaches 200km/h and above railway.From track structure pattern, high-speed railway is mainly divided into Ballast track structure and ballastless track structure two profiles formula.Ballast track because of its have that construction cost is low, noise transmission scope is little, the construction period is short, destroy time repair the outstanding advantages such as fast, mechanized maintenance efficiency is high, track geometry status adjustment is simple and be widely used on the high-speed railway of countries in the world.Along with the Large scale construction of China Express Railway, the employing of Ballast track structure will be inevitable.Beijing-Shanghai High-Speed Railway to put into operation: although Beijing-Shanghai High-Speed Railway non-fragment orbit ratio is more than 90%, at some Special zone, as Yellow River Bridge, Jinan and Nanjing Foundations of Dashengguan Changjiang River Bridge etc., will Ballast track be adopted.Therefore, further investigation must be launched for high-speed railway Ballast track structure.
High-speed railway requires that track structure must possess high ride and high stability, and has tiny fragments of stone, coal, etc. railway roadbed to be a kind of prose style free from parallelism structure, and railway ballast particle has the feature such as uncertainty and discreteness greatly.Therefore, open and the requirement of runing to meet high-speed railway, be necessary the feature such as strict, quick and easy for construction of railways and maintenance, inquire into reasonable, the thin sight of railway roadbed and the evaluation index of macro-mechanical property and function can be reflected again, with realize tiny fragments of stone, coal, etc. railway roadbed quality quick, rationally pass judgment on.
Summary of the invention
What the object of the invention is to optimize applicable China Express Railway feature has tiny fragments of stone, coal, etc. railway roadbed quality evaluation index, and the validity etc. of ease, the testing result of the mutual independence between the ballast-bed state reflected according to each evaluation index, each index, each index detection method, proposing a kind of high-speed railway has tiny fragments of stone, coal, etc. railway roadbed quality evaluating method.
For achieving the above object, the invention provides a kind of high-speed railway has tiny fragments of stone, coal, etc. railway roadbed quality evaluating method, and described evaluation method adopts ballast lateral resistance, pillow lower support rigidity and has the vertical resilience displacement percentage of tiny fragments of stone, coal, etc. railway roadbed as the evaluation index having tiny fragments of stone, coal, etc. railway roadbed quality,
When have tiny fragments of stone, coal, etc. railway roadbed reach the initial stage stablize time, described ballast lateral resistance >=12kN/ pillow, described pillow lower support rigidity >=120kN/mm, described in have vertical resilience displacement percentage >=60% of tiny fragments of stone, coal, etc. railway roadbed.
Based on technique scheme, advantage of the present invention is:
The present invention can make up the deficiency that high-speed railway has tiny fragments of stone, coal, etc. railway roadbed quality evaluating method to study, in depth studied by system and seek representative, comprehensive evaluation index and reasonable magnitude thereof, perfect China Express Railway Ballast track assessment technique system, achievement in research will directly serve new line construction and the maintenance of China Express Railway Ballast track, have important theory and realistic meaning.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structured flowchart that high-speed railway has tiny fragments of stone, coal, etc. railway roadbed quality evaluating method;
Tu2Wei road bed density is to the affecting laws figure of pillow lower support rigidity.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The present invention is according to the construction of high-speed railway Ballast track and maintenance strict, fast, the features such as convenience, to road bed density, longitudinal resistance, lateral resistance, pillow lower support rigidity four evaluation indexes are in the mutual relationship of Micromechanics mechanism aspect, ballast lateral resistance, sleeper support stiffness and road speed change are furtherd investigate the affecting laws of track structural dynamic response, according to different sub rail foundation, different construction stage ballast longitudinal resistance, lateral resistance, road bed density, the statistical study of pillow lower support rigidity measured data, to the mutual relationship of each evaluation index in macroscopic aspect, relation between the value of each evaluation index and high-speed railway Ballast track quality state enters analysis and summary, propose a kind of high-speed railway and have tiny fragments of stone, coal, etc. railway roadbed quality evaluating method.
Particularly, structured flowchart of the present invention as shown in Figure 1.The invention provides a kind of high-speed railway and have tiny fragments of stone, coal, etc. railway roadbed quality evaluating method, described evaluation method adopts ballast lateral resistance, pillow lower support rigidity and has the vertical resilience displacement percentage of tiny fragments of stone, coal, etc. railway roadbed as the evaluation index having tiny fragments of stone, coal, etc. railway roadbed quality.When have tiny fragments of stone, coal, etc. railway roadbed reach the initial stage stablize time, described ballast lateral resistance >=12kN/ pillow, described pillow lower support rigidity >=120kN/mm, described in have vertical resilience displacement percentage >=60% of tiny fragments of stone, coal, etc. railway roadbed.
Further, the present invention has the method for building up of tiny fragments of stone, coal, etc. railway roadbed quality evaluating method as follows:
(1) adopt PFC3D grain flow software, based on PFC3D built-in FISH language self-compiling program, and take into full account the physico-mechanical properties of granular ballast bed, set up III type sleeper-railway roadbed 3 d-dem element analysis model.This model has taken into full account the composition of the thin portion such as Contact, railway roadbed cross dimensions, sleeper pattern structure and the impact on overall mechanical characteristic thereof of high-speed railway railway ballast profile, grating, railway ballast particle, and is verified the accuracy of three-dimensional railway roadbed discrete element analysis and validity by the measured result of on-the-spot test.By the affecting laws that this model calculates friction factor between bed density, railway ballast particle, railway ballast level pairing railway roadbed indulges lateral resistance, correlativity calculation result under different railway roadbed railway ballast performance parameter between each evaluation index is summarized analysis, analyzes the mutual relationship between each evaluation index of railway roadbed quality.
(2) ABAQUS software is adopted to set up high-speed railway Ballast track vehicle-track-III type sleeper Space Coupling finite element analysis of dynamics model, in the process of Modling model, taken into full account one of vehicle, secondary suspension system, horizontal stop, the impacts such as the effect of anti-side rolling torsion rod and anti-hunting damper holder, and according to field measurement data, reliability demonstration is carried out to this model.The affecting laws of ballast lateral resistance, sleeper support stiffness and road speed change to values of lateral, car body vertical acceleration, wheel-rail lateral force, fastener support reaction, derailment coefficients and rate of wheel load reduction is calculated by this model, from aerodynamic point on the mutual relationship between each evaluation index and the controlling indicator affecting track quality, and by analyzing, obtain the reasonable magnitude of ballast lateral resistance and sleeper support stiffness when railway roadbed reaches steady state (SS).
(3) with many circuits for background, indulge on the basis of the field datas such as lateral resistance, packing, pillow lower support rigidity at different sub rail foundation, different construction stage railway roadbed, mutual relationship between research railway roadbed evaluation index, the change of railway roadbed evaluation index value are on the impact of track quality state, and mutually verify with theoretical analysis result, obtaining high-speed railway has tiny fragments of stone, coal, etc. railway roadbed quality evaluation index and value thereof.
The present invention is on the basis of a large amount of Field Research, measured data and theoretical analysis, respectively from the mutual relationship thin seen, macroscopic aspect analyzes each index of existing ballast-bed state, ballast-bed state to the affecting laws of track dynamic response, propose a set of high-speed railway based on analysis result and have tiny fragments of stone, coal, etc. railway roadbed quality evaluation index, and the feature of tiny fragments of stone, coal, etc. railway roadbed is had on this basis for China Express Railway, propose a set of optimization railway roadbed quality evaluating method being applicable to China Express Railway.
High-speed railway of the present invention have the principle of tiny fragments of stone, coal, etc. railway roadbed quality evaluating method and concrete analysis process as follows:
Described evaluation method calculates ballast longitudinal resistance, lateral resistance, packing, pillow lower support rigidity under different railway ballast and railway roadbed parameter, according to the Changing Pattern of four indices under different operating mode, and the mutual relationship between each index of analysis and summary.
1, sleeper-railway roadbed 3 d-dem element analysis model that the present invention sets up is applied, the relation of layer viewpoint between road bed density and railway roadbed vertical, horizontal resistance is seen from thin, table 1 is railway roadbed longitudinal direction, lateral resistance result under different operating mode, and table 2 is the correlation analysis results under different operating mode between railway roadbed quality index.
Table 1: railway roadbed vertical, horizontal drag consequence under different operating mode
Table 2: the correlation analysis between each evaluation index
By analyzing above and can drawing: as shown in Figure 2, changing under bed density, railway ballast friction factor, railway ballast grating working condition respectively, ballast longitudinal resistance, lateral resistance Changing Pattern are consistent substantially, both related coefficients reach 0.95,0.99,0.86 at different conditions respectively, and correlativity is larger.So ballast lateral resistance can replace vertical lateral resistance as the evaluation index of railway roadbed plane mechanical characteristic to a certain extent; Railway roadbed indulges lateral resistance correlativity comparatively greatly, and from variation tendency, and road bed density also has good corresponding relation; Pillow lower support rigidity increases along with the increase of road bed density, and density is greater than 1.7g/cm
3time, both are approximate is linearly correlated with, and related coefficient is greater than 0.97, good relationship, and pillow lower support rigidity can reflect the density of railway roadbed to a certain extent.
From theoretical analysis, railway roadbed indulges lateral resistance correlativity very greatly, and road bed density is larger with pillow lower support rigidity correlativity.So, ballast lateral resistance can be chosen and rest the head on the evaluation index of lower support rigidity as railway roadbed quality.
2, apply high-speed railway Ballast track vehicle-track-III type sleeper Space Coupling finite element analysis of dynamics model that the present invention sets up, analyze the affecting laws of ballast lateral resistance, sleeper support stiffness and road speed change to each mechanical response index of track structure.Wherein, table 3 is each response index maximal values of different ballast lateral resistance lower railway; Table 4 is each response index maximal values of different pillow lower support rigidity lower railway; Table 5 is each response index maximal values of different rows vehicle speed lower railway.
Table 3: each response index maximal value of different ballast lateral resistance lower railway
Note: in table, all operating modes get 120kN/mm at railway roadbed support stiffness, road speed calculates under getting 250km/h situation.
Table 4: each response index maximal value of different pillow lower support rigidity lower railway
Note: in table, all operating modes get 12kN/ pillow in ballast lateral resistance, 14kN/ pillow is got in longitudinal resistance, road speed calculates under getting 250km/h situation.
Table 5: each response index maximal value of different rows vehicle speed lower railway
Note: in table, all operating modes get 120kN/mm at railway roadbed support stiffness, 14kN/ pillow is got in longitudinal resistance, lateral resistance calculates under getting 12kN/ pillow situation.
Can draw the following conclusions from above result of calculation:
(1) when ballast lateral resistance value changes within the specific limits, values of lateral is increase tendency, but maximal value is only 0.044g, less on passenger comfort impact, derailment coefficients and rate of wheel load reduction change very micro-, can not affect greatly travel safety and stability.Therefore, when railway roadbed reaches steady state (SS), regulation ballast lateral resistance in " high speed railway track engineering construction quality acceptance criteria " (TB10754-2010) >=12kN/ pillow, meet high-speed railway roadability and security requirement, and value leaves certain safe clearance.
(2) when railway roadbed support stiffness changes within the specific limits, less on the impact of values of lateral, wheel-rail lateral force, fastener support reaction, derailment coefficients and rate of wheel load reduction, rail vertical acceleration shows a rising trend, when railway roadbed support stiffness is 160kN/mm, increase 17.4%, because Ballast rigidity increases gradually, rail vertical deviation is on a declining curve, when railway roadbed support stiffness is 120kN/mm, rail vertical deviation is 1.33mm, reduces 23.1%, the reasonable raising of Ballast rigidity is described, the vertical deviation amount of rail can be reduced, improve wheel rail relation.When resting the head on lower support rigidity >=120kN/mm, the dynamic response of track all in the reasonable scope.Therefore, when railway roadbed reaches steady state (SS), in " high speed railway track engineering construction quality acceptance criteria " (TB10754-2010), regulation pillow lower support rigidity >=120kN/mm, meets high-speed railway roadability and security requirement.
(3) road speed reaches 350km/h, the dynamic response of track is all within normal range, ballast-bed state is good, therefore, when railway roadbed reaches steady state (SS), the pillow lower support rigidity >=120kN/mm of regulation in " high speed railway track engineering construction quality acceptance criteria " (TB10754-2010), ballast lateral resistance >=12kN/ pillow, can meet high-speed railway roadability and security requirement.
3, in order to study the mutual relationship of existing each index in macroscopic aspect further, the reliability of theoretical analysis result is verified simultaneously, statistical study has been carried out to the different construction stage ballast-bed state index measured data of many circuits.Table 6 is contrasts of ballast-bed state several index on the different infrastructure in different time different location; Table 7 is the correlation analysis results on the different infrastructure of different time between railway roadbed quality index.
Table 6: the contrast of ballast-bed state several index on the different infrastructure in different time different location
Table 7: the correlation analysis on different infrastructure between railway roadbed quality index
Can be drawn by above data statistic analysis:
(1) longitudinal resistance and lateral resistance have good corresponding relation (two indices is not independent) in variation tendency, because longitudinal resistance measuring accuracy difficulty is unified, discreteness is larger, and lateral resistance measuring accuracy compared with high, discreteness is little, interference from human factor is few, do not destroy railway roadbed, therefore, lateral resistance can be adopted evaluate when evaluating the mechanical property of railway roadbed plane.
(2) difference of indulging lateral resistance during different construction stage railway roadbed 2mm is inconsistent, and pile high relevant with the turgor of railway roadbed, shoulder in pillow box, and it is different to affect proportion to longitudinal direction, lateral resistance, therefore can not go instead to push away longitudinal resistance value by lateral resistance value.
(3) vertical index and horizontal index have certain correlativity, and therefore ballast lateral resistance as the rough a kind of method controlling ballast-bed state, but can not reflect the mechanical characteristic that railway roadbed is vertical well.
(4) the lower rigidity reflection of pillow is railway roadbed and the global stiffness on basis under its line, and the dense state that this and density only react railway roadbed is slightly different, is therefore therebetween relevant, but nothing corresponding relation preferably.
(5) the resilience displacement percentage evaluation index of rigidity, itself and road bed density have larger correlativity, can reflect the elastic performance of railway roadbed.
Because the method for testing disunity of road bed density, method of testing also exist larger error and dispute, some methods also destroy railway roadbed, therefore can adopt resilience number percent, rigidity two indices carrys out the evaluation that alternative density carries out ballast-bed state.
(6) in newly-built circuit operation initial stage, the train number of times passed through more multiple tracks bed more tends towards stability, and by (about 100,000 tons) before train 25 times, resilience displacement percentage numerical value is less, and some stage can diminish, become afterwards large (having individual process repeatedly).Freight volume reaches 100,000 ton hours, and resilience number percent is more than 60%, and now ballast-bed state tends towards stability just gradually.After operation 40 times (about 160,000 tons) train, resilience displacement percentage floats and diminishes, and remains on more than 60%.This illustrates when just starting operation, and for still unstabilized railway roadbed, because train is to the disturbance of railway roadbed, causes the flexible reduction of railway roadbed, and after operation certain hour, railway roadbed elasticity is recovered gradually, improved, and tends towards stability.When the bright ballast-bed state of above analytical table tends towards stability, resilience number percent value should be not less than 60%.
Comprehensive discrete element, theoretical analysis of finite element result and field test data statistic analysis result can draw:
(1) what high-speed railway had a tiny fragments of stone, coal, etc. railway roadbed quality evaluation index chooses aspect: have the actual-structure measurement analysis of tiny fragments of stone, coal, etc. ballast-bed state and shop experiment checking all to show based on sleeper-railway roadbed discrete element analysis analysis, many circuits: ballast lateral resistance, pillow lower support rigidity and resilience displacement percentage thereof completely can as the indexs evaluating railway roadbed quality.
(2) high-speed railway has the value aspect of tiny fragments of stone, coal, etc. railway roadbed quality evaluation index: the newly-built line work progress actual-structure measurement based on vehicle-track-III type sleeper Space Coupling dynamics model analysis, many circuits is analyzed, suggestion is on " high speed railway track engineering construction quality acceptance criteria " (TB10754-2010) basis, the newly-increased vertical resilience displacement percentage of railway roadbed is as railway roadbed quality evaluation index, and advise that railway roadbed reaches the initial stage when stablizing, the vertical resilience displacement percentage of railway roadbed is not less than 60%.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (1)
1. high-speed railway has a tiny fragments of stone, coal, etc. railway roadbed quality evaluating method, it is characterized in that: described evaluation method adopts ballast lateral resistance, pillow lower support rigidity and has the vertical resilience displacement percentage of tiny fragments of stone, coal, etc. railway roadbed as the evaluation index having tiny fragments of stone, coal, etc. railway roadbed quality,
When have tiny fragments of stone, coal, etc. railway roadbed reach the initial stage stablize time, described ballast lateral resistance >=12kN/ pillow, described pillow lower support rigidity >=120kN/mm, described in have vertical resilience displacement percentage >=60% of tiny fragments of stone, coal, etc. railway roadbed.
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| CN108622130A (en) * | 2017-03-17 | 2018-10-09 | 襄阳爱默思智能检测装备有限公司 | A kind of novel track component detection system |
| CN109029881A (en) * | 2018-06-21 | 2018-12-18 | 中国铁道科学研究院铁道建筑研究所 | A kind of ballast-bed state appraisal procedure detected based on orbit rigidity and Ground Penetrating Radar |
| CN109712270A (en) * | 2018-12-28 | 2019-05-03 | 西南交通大学 | A kind of railway freight car operational safety appraisal procedure and system |
| CN111523243A (en) * | 2020-04-29 | 2020-08-11 | 中国国家铁路集团有限公司 | Intelligent maintenance analysis system for ballast track bed |
| CN112668087A (en) * | 2021-01-11 | 2021-04-16 | 武汉理工大学 | Ballasted track modeling analysis method and system based on finite element and discrete element coupling |
| CN115214728A (en) * | 2022-07-15 | 2022-10-21 | 北京交通大学 | Intelligent stabilizing vehicle for detecting quality state of ballast track after tamping stabilizing operation |
| CN115791456A (en) * | 2023-02-06 | 2023-03-14 | 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 rigidity of railway ballast track |
| CN111797459B (en) * | 2020-07-21 | 2023-10-24 | 北京交通大学 | Construction method of ballasted track-bridge dynamic coupling model |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108622130A (en) * | 2017-03-17 | 2018-10-09 | 襄阳爱默思智能检测装备有限公司 | A kind of novel track component detection system |
| CN109029881A (en) * | 2018-06-21 | 2018-12-18 | 中国铁道科学研究院铁道建筑研究所 | A kind of ballast-bed state appraisal procedure detected based on orbit rigidity and Ground Penetrating Radar |
| CN109029881B (en) * | 2018-06-21 | 2020-12-04 | 中国铁道科学研究院铁道建筑研究所 | Track bed state evaluation method based on track rigidity and ground penetrating radar detection |
| CN109712270A (en) * | 2018-12-28 | 2019-05-03 | 西南交通大学 | A kind of railway freight car operational safety appraisal procedure and system |
| CN109712270B (en) * | 2018-12-28 | 2020-07-24 | 西南交通大学 | Railway freight vehicle operation safety assessment method and system |
| CN111523243A (en) * | 2020-04-29 | 2020-08-11 | 中国国家铁路集团有限公司 | Intelligent maintenance analysis system for ballast track bed |
| CN111523243B (en) * | 2020-04-29 | 2023-08-25 | 中国国家铁路集团有限公司 | Intelligent maintenance analysis system for ballast bed |
| CN111797459B (en) * | 2020-07-21 | 2023-10-24 | 北京交通大学 | Construction method of ballasted track-bridge dynamic coupling model |
| CN112668087A (en) * | 2021-01-11 | 2021-04-16 | 武汉理工大学 | Ballasted track modeling analysis method and system based on finite element and discrete element coupling |
| CN115214728A (en) * | 2022-07-15 | 2022-10-21 | 北京交通大学 | Intelligent stabilizing vehicle for detecting quality state of ballast track after tamping stabilizing operation |
| CN115214728B (en) * | 2022-07-15 | 2024-05-10 | 北京交通大学 | Intelligent stabilizing vehicle for detecting quality state of ballasted track after tamping stabilizing operation |
| CN115791456A (en) * | 2023-02-06 | 2023-03-14 | 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 rigidity of railway ballast track |
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Application publication date: 20151216 |