Performance of shallow foundations on municipal waste landfills

城市垃圾填埋场浅基础的性能

• 批准号: 249733-2012
• 负责人: Fleming, Ian
• 金额: $ 1.38万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570704
• 关键词: Performance; shallow; foundations; municipal; waste

There are tens of thousands of closed municipal landfills in Canada, primarily in and near urban communities, and these lands, for the most part, remain unused or used only for very low-value purposes. There is an opportunity to explore the use of these lands for industrial or municipal infrastructure, thus freeing up other land for high value activities. It is therefore necessary to consider the properties of landfilled waste when evaluating the possibility that infrastructure may be constructed on closed landfills. At present, technical and regulatory barriers to higher-value uses of closed landfill sites are associated with two categories of risk, which may be termed: i) "Environmental Risk"; and ii) "Geotechnical Risk". There is evident environmental risk associated with explosion hazard as well as contaminants in landfill gas. Without dismissing concerns regarding Environmental Risks, the intent of this proposal is to consider that -assuming modern engineered barriers can be used to mitigate environmental risk - the limitations to higher-value after-uses would increasingly switch toward the risk associated with the geotechnical or mechanical properties of the waste fill material and the consequent performance of facilities constructed on waste. There are several examples of significant infrastructure supported by shallow foundations on waste. For example, 3 wind turbines supported by large ring footings on a landfill in Karlsruhe Germany have undergone significant vertical settlement with only minimal problems with differential settlement or tilting, although the degree to which the designs might have been made more efficient is not known. A number of researchers have studied the overall settlement of landfills, however studies to date have not addressed the scale and patterns of differential settlement and the consequent effect on shallow foundations. The research will incorporate field and laboratory tests intended to provide engineering designers with an enhanced basis upon which to design facilities on landfilled waste, with the view to reducing the level of uncertainty and associated overdesign.

加拿大有数万个封闭的市政垃圾填埋场，主要在城市社区内和附近，这些土地大多未被使用或仅用于价值很低的目的。 有机会探索将这些土地用于工业或市政基础设施，从而腾出其他土地用于高价值活动。 因此，在评估在已关闭的填埋场上建造基础设施的可能性时，有必要考虑填埋废物的特性。 目前，封闭式垃圾填埋场高价值用途的技术和监管障碍与两类风险有关，这两类风险可称为：一）“环境风险”;和二）“地质风险”。 堆填区气体中的爆炸危险和污染物具有明显的环境风险。 在不排除对环境风险的担忧的情况下，本提案的目的是考虑-假设现代工程屏障可用于减轻环境风险-对高价值后使用的限制将越来越多地转向与废物填充材料的岩土工程或机械特性以及在废物上建造的设施的后续性能相关的风险。 有几个例子表明，废物上的浅基础支撑着重要的基础设施。 例如，德国卡尔斯鲁厄垃圾填埋场上由大型环形基脚支撑的3台风力涡轮机经历了显著的垂直沉降，只有最小的不均匀沉降或倾斜问题，尽管设计可能更有效的程度尚不清楚。 许多研究人员已经研究了垃圾填埋场的整体沉降，但迄今为止的研究还没有解决差异沉降的规模和模式以及对浅地基的影响。 该研究将包括实地和实验室测试，旨在为工程设计人员提供一个更好的基础，以设计填埋废物的设施，以减少不确定性和相关的过度设计。