Comparison of ballast index tests for railway trackbeds

IF 0.3 Q4 ENGINEERING, GEOLOGICAL
G. McDowell, W. Lim, A. Collop, R. Armitage, N. Thom
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引用次数: 37

Abstract

It is important to have consistent ballast testing methods that provide results reflecting the performance of different ballast materials in the railway trackbed. Extensive laboratory tests have been conducted to investigate the correlation between simple ballast index tests and box tests simulating ballast field loading conditions in a simplified and controlled manner. Ballast is tamped using a vibratory poker, which causes particles to rearrange as the level of the sleeper is raised. The index tests used include single particle crushing tests, oedometer tests, and attrition tests in a revolving drum (WAV, MDA and LAA tests), in addition to water absorption and particle shape characteristics and petrographic analysis. The attrition tests performed in a revolving drum (WAV, LAA and MDA) have been found to give the best correlations with the performance of ballast in the box tests. It is considered that this may be due to the rearrangement of particles in the box test caused by the simulated tamping.
铁道路基压载指标试验比较
具有一致的碴道试验方法,以提供反映铁路轨道上不同碴道材料性能的结果是很重要的。进行了大量的实验室试验,以研究简单的压载指标试验与以简化和可控的方式模拟压载现场加载条件的箱试验之间的相关性。压载物是用振动拨棍夯实的,当轨枕的水平升高时,粒子会重新排列。所使用的指标测试包括单颗粒破碎测试、粘度计测试和旋转滚筒磨损测试(WAV、MDA和LAA测试),以及吸水率和颗粒形状特征以及岩石学分析。在旋转鼓中进行的磨损试验(WAV、LAA和MDA)与箱试验中镇流器性能的相关性最好。认为这可能是由于模拟夯实引起的箱形试验中颗粒重排所致。
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来源期刊
Geotechnical Engineering
Geotechnical Engineering ENGINEERING, GEOLOGICAL-
CiteScore
0.50
自引率
0.00%
发文量
0
期刊介绍: The objectives of the Association shall be the promotion of co-operation among geotechnical societies in SE Asia; and the assistance to member societies who have limited number of members. Now there is only one combined web titled: AGSSEA-SEAGS. SEAGS & AGSSEA encourage the submission of scholarly and practice-oriented articles to its journal. The journal is published quarterly. Both sponsors of the journal, the Southeast Asian Geotechnical Society and the Association of Geotechnical Societies in Southeast Asia, promote the ideals and goals of the International Society of Soil Mechanics and Geotechhnical Engineering in fostering communications, developing insights and enabling the advancement of the geotechnical engineering discipline.
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