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<p>A series of large-scale cyclic triaxial tests were conducted to study the accumulated deformation characteristics of coarse-grained soil under heavy-haul train loads. The tests aimed to analyze the influences of confining pressure and cyclic stress ratio on the accumulated deformation of coarse-grained soil. The results indicate that the accumulated strain of coarse-grained soil increases with an increase in the number of cycles, but the rate of increase gradually diminishes. When the cyclic stress ratio is 0.2 and 0.3, the accumulated strain develops slowly after a certain number of cycles. When the cyclic stress ratio is 0.4, even after the test is completed, the rate of increase in accumulated strain remains significant. Based on the test results, the paper adopts a hyperbolic model to predict the accumulated deformation of coarse-grained soil under long-term cyclic load and provides empirical formulas for the model parameters.</p>

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Accumulated Deformation Behavior of Coarse-Grained Soil Under Cyclic Loading

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • Yu Ding,
  • Ni Gao,
  • Jiading Li,
  • Tingpei Liao,
  • Weibo Wang

摘要

A series of large-scale cyclic triaxial tests were conducted to study the accumulated deformation characteristics of coarse-grained soil under heavy-haul train loads. The tests aimed to analyze the influences of confining pressure and cyclic stress ratio on the accumulated deformation of coarse-grained soil. The results indicate that the accumulated strain of coarse-grained soil increases with an increase in the number of cycles, but the rate of increase gradually diminishes. When the cyclic stress ratio is 0.2 and 0.3, the accumulated strain develops slowly after a certain number of cycles. When the cyclic stress ratio is 0.4, even after the test is completed, the rate of increase in accumulated strain remains significant. Based on the test results, the paper adopts a hyperbolic model to predict the accumulated deformation of coarse-grained soil under long-term cyclic load and provides empirical formulas for the model parameters.