Limiting local tensions in landfill geomembranes

限制垃圾填埋场土工膜的局部张力

• 批准号: 217430-2013
• 负责人: Brachman, Richard
• 金额: $ 2.55万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523788
• 关键词: Limiting; local; tensions; landfill; geomembranes

Around 30 million tonnes of solid waste is generated each year in Canada (StatsCan 2005). Despite tangible results from efforts to reduce, reuse and recycle waste, Canadians will continue to require landfills for the safe disposal of municipal and industrial solid waste for the foreseeable future. Barrier systems comprised of a geomembrane (a thin plastic sheet) overlying low permeability clay are used to line the bottom of landfills. The purpose of the barrier system is to prevent groundwater contamination by minimizing the escape of toxic chemicals (like heavy metals and hydrocarbons) into the surrounding environment. A long-lasting geomembrane is key to ensuring adequate long-term environmental protection. The physical response of the geomembrane when buried beneath large amounts of waste directly impacts how long it will last, especially the local tensions that can develop in the geomembrane from overlying gravel particles. Physical experiments will be devised and conducted, and numerical analyses will be developed and applied to prevent geomembrane rupture from local tensions in landfill geomembranes. As local tensions depend on the plastic membrane, the surrounding soil, the amount of waste, temperature and time, the proposed studies combine necessary elements from geotechnical engineering, geosynthetics engineering and engineering mechanics. This research builds on the applicant's strong track record of solving problems involving buried polymer structures for use in environmental applications. Four Doctoral and five Masters students will receive advanced training over five years. As premature failure of landfill barrier systems may result in substantial long-term social, environmental and possible health impacts as a result of groundwater contamination, the proposed research will improve the long-term physical performance of geomembrane liners, and will benefit Canadians with landfills that provide greater long-term environmental protection.

每年在加拿大产生约3000万吨的固体废物（Statscan 2005）。 尽管努力减少，再利用和回收浪费的努力有形，但加拿大人仍将继续需要垃圾填埋场才能在可预见的未来安全处理市政和工业固体废物。 屏障系统由大地上（薄塑料板）组成，上面覆盖低渗透率的粘土来衬砌垃圾填埋场的底部。 屏障系统的目的是通过最大程度地减少有毒化学物质（例如重金属和碳氢化合物）进入周围环境来防止地下水污染。 持久的地膜是确保足够长期环境保护的关键。 埋在大量废物以下时，地膜的物理反应直接影响它的持续时间，尤其是在土工膜上可以在覆盖砾石颗粒的局部紧张局势。 将设计和进行物理实验，并将开发数值分析，并应用以防止垃圾填埋地土工膜的局部紧张局势破裂。 由于局部紧张局势取决于塑料膜，周围的土壤，废物，温度和时间的量，拟议的研究结合了岩土工程，地质工程工程和工程机制的必要元素。 这项研究基于申请人的强大记录，以解决涉及埋入聚合物结构的问题，以用于环境应用。 四个博士和五名硕士学生将在五年内接受高级培训。 由于垃圾填埋场屏障系统的过早失败可能会导致大量的长期社会，环境和可能由于地下水污染而产生的健康影响，因此拟议的研究将改善地膜衬里的长期物理性能，并将使加拿大人受益于加拿大人的垃圾填埋场，以提供更大的长期环境保护。