(a) Earthquake response of natural silts; (b) response of buried pipelines to ground movements; and (c) mechanical response of mine waste

(a) 天然淤泥的地震反应；

• 批准号: 249603-2007
• 负责人: Wijewickreme, Dharmapriya
• 金额: $ 1.42万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=362253
• 关键词: Earthquake; response; natural; silts; buried

Geotechnical engineering research on three topics that are of global significance, with particular applicability to seismic design, mining, and pipeline engineering is proposed.  The focus is to undertake novel and leading-edge research that would advance the fundamental knowledge while addressing real-life needs.  EARTHQUAKE RESPONSE OF SILTS: There is significant controversy regarding the current approaches to assess the earthquake response of fine-grained soils.  Evidence from recent earthquakes has also emphasized the need for understanding the response of natural silts.  With this background, laboratory research is proposed to study the mechanical response of silts.  The research will directly contribute to advancing the knowledge and improving design methods/guidelines in earthquake geotechnical engineering.RESPONSE OF BURIED PIPELINES TO GROUND MOVEMENT: Polyethylene (PE) pipes are becoming increasingly popular in buried natural gas distribution systems, and the performance of these systems in areas subjected to ground deformations is an important engineering consideration.  Due to lack of fundamental knowledge, in the evaluation of PE piping, the current practice mainly relies on the methods developed for steel pipes, and this approach has significant limitations.  Research is proposed to understand the performance of buried PE pipelines under ground movements using full-scale model testing and numerical modeling.  The findings will provide input to developing guidelines for safe operation of PE gas pipeline systems.MECHANICAL RESPONSE OF MINE WASTE:  Mixing mine waste rock and tailings for disposal is a relatively new concept in mine waste management to prevent problems such as acid rock drainage and liquefaction.  Current understanding of the mechanical response of mine waste mixtures is very limited.  It is proposed to study the mechanical response of this complex material using advanced laboratory element testing.  The work will support the development of new technology and material science required for blended disposal of mine waste.

岩土工程研究的三个主题具有全球意义，特别适用于地震设计，采矿和管道工程。重点是进行新颖和前沿的研究，以提高基础知识，同时满足现实生活的需求。地震反应的淤泥：关于目前评估精细结构地震反应的方法存在重大争议，粒状土。最近地震的证据也强调了理解天然淤泥反应的必要性。在此背景下，建议进行粉土力学响应的实验室研究。该研究将直接有助于提高认识和改进地震岩土工程的设计方法/指南。埋地管道对地震运动的响应：聚乙烯（PE）管道在埋地天然气输配系统中越来越受欢迎，这些系统在遭受地面变形的地区的性能是一个重要的工程考虑因素。由于缺乏基础知识，在评价PE管道时，目前的实践主要依赖于为钢管开发的方法，本文提出了一种利用全过程模拟的方法来研究埋地PE管道在地面运动下的性能，缩尺模型试验和数值模拟。研究结果将为制定聚乙烯燃气管道系统的安全操作指南提供输入。矿山废物的机械响应：混合矿山废石和尾矿进行处置是矿山废物管理中相对较新的概念，以防止诸如酸性岩石排水和液化的问题。目前对矿山废弃物混合物力学响应的认识还很有限，建议采用先进的实验室元件测试方法研究这种复杂材料的力学响应，这一工作将为矿山废弃物混合处置所需的新技术和材料科学的发展提供支持。