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Integrated risk of rail buckling in ballasted tracks at transition zones and its countermeasures

机译：过渡带道ball道轨屈曲的综合风险及对策

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摘要

Railway ballasted tracks at transition zones from embankment sections to bridge sections (or the reverse) suffer not only from seismic motions, but also from differential settlements during seismic motions. Therefore, an attempt is made in this study to evaluate the combined effects of hanging sleepers and seismic inertia force on the lateral resistance of ballast in the tracks at transition zones. A series of laboratory tests was conducted on 1/5 scale models to evaluate the lateral resistance characteristics under situations of hanging sleepers or under pseudostatic conditions. The results of the pullout tests revealed that the rail-buckling potential can be underestimated without the consideration of combined effects of hanging sleepers and the seismic inertia force on the lateral resistance. Based on the model test results, the combination of anti-buckling plates and ballast retaining walls is proposed as a new earthquake countermeasure. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：从路堤段到桥梁段（或反面）的过渡区的铁路压载轨道不仅遭受地震运动，而且遭受地震运动期间的差异沉降。因此，本研究试图评估悬垂轨枕和地震惯性力对过渡区轨道中道ball侧向阻力的综合影响。在1/5比例模型上进行了一系列实验室测试，以评估在卧铺的床或假静态条件下的侧向阻力特性。拉拔试验的结果表明，如果不考虑悬挂轨枕和地震惯性力对侧向阻力的综合影响，可以低估钢轨的屈曲潜力。根据模型试验结果，提出了抗弯板与压载挡土墙的组合作为一种新的地震对策。 （C）2019年由Elsevier B.V.代表日本岩土工程学会制作和主持。

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