Response of Vertical Drains in Soft Subgrade under Cyclic Rail Loading

循环轨道荷载作用下软基竖向排水的响应

• 批准号: DP230101769
• 负责人: Prof Buddhima Indraratna
• 金额: $ 40.18万
• 依托单位: University of Technology Sydney
• 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
• 起止时间: 2023-01-01 至 2025-12-31
• 项目状态: 未结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP230101769
• 关键词: Response; Vertical; Drains; Soft; Subgrade

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.

软地层（路基）在承受重且重复（循环）的列车载荷时可能会变得不稳定。该项目旨在研究铁路路堤下软基土不排水失稳的原因和机制，并评估预制垂直排水沟（PVD）稳定此类土壤的有效性。 PVD 在提高赛道性能方面的作用将通过严格的数学技术来量化，并补充基于计算机的数值模型，该模型可以通过实验室和现场数据进行验证。它将带来切实的成果，准确预测火车长时间装载时软地基的长期沉降，同时延长现代铁路基础设施的使用寿命。