Old railway embankment clay fill - laboratory experiments, numerical modelling and field behaviour
Old railway embankment clay fill - laboratory experiments, numerical modelling and field behaviour
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旧铁路路基粘土填充 - 实验室实验、数值模拟和现场行为
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
D. Russell
中科院分区：
文献类型：
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作者：
R. Jardine;D. Potts;K. Higgins;A. O'brien;E. Ellis;D. Russell
英国铁路路基通常有100多年的历史，在英格兰南部，通常由高塑性粘土填料组成。它们是在没有压实的情况下建造的，末端松散地倾斜到位。植被大量生长，根据植被的类型和范围，植被很容易倒塌或出现严重的使用问题。本文总结了粘土填料块体试样的室内试验结果。还对再造土壤进行了试验。本文考虑了“结构”对强度、刚度和渗透特性的不同影响。进行了数值分析，利用非线性应力-应变模型，峰前和峰后应变软化对剩余强度。一个具有挑战性的领域是了解植被的影响;与草相比，树木的行为被认为是。数值模型的预测进行了比较的情况下，跟踪位移的季节性变化的历史。有关覆盖摘要，请参见ITRDE 128041。
UK railway embankments are typically more than 100 years old, and, in southern England, are generally composed of high plasticity clay fills. They were built without compaction by end-tipping loosely into place. Significant vegetation growth has developed and, depending on the vegetation type and extent, the embankments are prone to collapse or to severe serviceability problems. The paper summarises laboratory test results on block samples of clay fill. Tests were also carried out on reconstituted soils. The paper considers the varying influences of 'structure' on strength, stiffness and permeability characteristics. Numerical analyses were carried out which utilised a non-linear stress-strain model, both pre-peak and post-peak with strain softening towards residual strength. A challenging area is understanding the influence of vegetation; the behaviour of trees compared with grass is considered. The numerical model predictions are compared with a case history where seasonal variations in track displacement were monitored. For the covering abstract see ITRDE128041.