Response of Vertical Drains in Soft Subgrade under Cyclic Rail Loading
Response of Vertical Drains in Soft Subgrade under Cyclic Rail Loading
批准号:
DP230101769
负责人:
Prof Buddhima Indraratna
金额:
$40.18万
依托单位国家:
澳大利亚
项目类别:
Discovery Projects
财政年份:
2023
资助国家:
澳大利亚
项目状态:
未结题
起止时间:
2023-01-01 至 2025-12-31
中文摘要
在重载和重复(循环)列车荷载作用下,软地层(路基)可能会变得不稳定。本项目旨在研究铁路路基下软土不排水失稳的原因和机理,并评估预制垂直排水沟(PVD)对这类土的稳定效果。PVD在提高轨道性能方面的作用将通过严格的数学技术与基于计算机的数值模型相补充来量化,该模型可以通过实验室和现场数据进行验证。它将为准确预测长期列车荷载下软土地基的长期沉降,同时延长现代铁路基础设施的使用寿命带来切实的成果。
英文摘要
Soft formations (subgrade) can become unstable when subjected to heavy and repeated (cyclic) train loading. This project aims to investigate the cause and mechanisms of undrained instability of soft subgrade soil beneath rail embankments, and to assess the effectiveness of prefabricated vertical drains (PVDs) in stabilising such soils. The role of PVDs to enhance track performance will be quantified via rigorous mathematical techniques complementing a computer-based numerical model, which can be validated by laboratory and field data. It will deliver tangible outcomes for accurately predicting the long-term settlements in soft foundations over prolonged train loading while extending the life span of modern railroad infrastructure.
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