Experimental Study of Railway Trackbed Pressure Distribution Under Dynamic Loading

IF 0.6 4区 工程技术 Q4 ENGINEERING, CIVIL Baltic Journal of Road and Bridge Engineering Pub Date : 2019-12-27 DOI:10.7250/bjrbe.2019-14.455
M. Sysyn, V. Kovalchuk, O. Nabochenko, Y. Kovalchuk, O. Voznyak
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引用次数: 12

Abstract

Reliable and durable operation of the railway track under the dynamic load of the rolling stock depends considerably on the ability of the ballast layer to get the load from the sleepers and distribute it to the subgrade. In this paper, the experimental study of the distribution properties of the ballast layer under the impact of dynamic loading depending on the density of the ballast layer is carried out. The ballast behaviour during load cycles is estimated by pressure measurements at the ballast prism base along the axis of a sleeper with simultaneous video observation of the ballast particles movement through transparent sidewalls of the box with crushed stone. Measurements of pressure distribution are carried out with the developed microcontroller system of measurements and developed load cells. The system allows performing multi-point measurements of stress in combination with measurements of acceleration and photogrammetry. The results of measurements showed a significant effect of the ballast layer consolidation on the distribution of stresses under the sleeper. The performed research opens up opportunities for practical improvement of the existing types of track structures and the technology of the ballast layer tamping in terms to provide the optimal conditions for the ballast layer operation.
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动载作用下铁路道床压力分布的试验研究
铁路轨道在机车车辆动态载荷下的可靠和持久运行在很大程度上取决于道碴层从枕木获得载荷并将其分配到路基的能力。本文对动态载荷作用下压载层的分布特性进行了试验研究。负载循环期间的压载行为是通过沿轨枕轴线在压载棱镜底座处进行的压力测量来估计的,同时通过视频观察压载颗粒穿过装有碎石的箱子的透明侧壁的运动。压力分布的测量是用开发的微控制器测量系统和开发的测压元件进行的。该系统允许结合加速度和摄影测量进行应力的多点测量。测量结果表明,道碴层固结对轨枕下应力分布有显著影响。所进行的研究为实际改进现有类型的轨道结构和道碴层夯实技术提供了机会,为道碴层运营提供了最佳条件。
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来源期刊
Baltic Journal of Road and Bridge Engineering
Baltic Journal of Road and Bridge Engineering 工程技术-工程:土木
CiteScore
2.10
自引率
9.10%
发文量
25
审稿时长
>12 weeks
期刊介绍: THE JOURNAL IS DESIGNED FOR PUBLISHING PAPERS CONCERNING THE FOLLOWING AREAS OF RESEARCH: road and bridge research and design, road construction materials and technologies, bridge construction materials and technologies, road and bridge repair, road and bridge maintenance, traffic safety, road and bridge information technologies, environmental issues, road climatology, low-volume roads, normative documentation, quality management and assurance, road infrastructure and its assessment, asset management, road and bridge construction financing, specialist pre-service and in-service training;
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