Limit states of buried polymer environmental structures

地埋式聚合物结构是缓解我们日益增长的城市地区面临的两个环境挑战所必需的，我们将对此进行研究。第一种涉及土工合成衬垫(薄塑料和粘土/织物衬垫)，以将污染物保留在大型垃圾填埋场数百年，以防止不可接受的环境影响(例如，对地表水和地下水的污染)。第二个方案使用聚合物雨水蓄水结构(地下塑料水箱)来管理因城市发展引起的景观变化而导致的降雨和融雪径流量的增加和质量的下降，以限制环境破坏(如侵蚀、非点源污染)。为了提供环境保护，必须防止土工合成衬里在掩埋在大量废物下时破裂，以及聚合物雨水蓄水结构在受到大型车辆压力时坍塌。了解聚合物结构的物理要求和聚合物结构的极限状态(穿孔、坍塌)对于防止不可接受的性能至关重要。

Buried polymer structures that are necessary to alleviate two environmental challenges faced by our growing urban areas will be studied. The first involves geosynthetic liners (thin plastic and clay/fabric liners) to retain contaminants in large landfills for hundreds of years to prevent unacceptable environmental impact (e.g., pollution of surface and ground water). The second uses polymer stormwater retention structures (underground plastic tanks) to manage the increased quantity and decreased quality of runoff from rain and melting snow caused by landscape changes from urban development to limit environmental damage (e.g., erosion, nonpoint source pollution). To provide environmental protection, rupture of geosynthetic liners when buried beneath enormous amounts of waste and collapse of polymer stormwater retention structures when subjected to large vehicle forces must be prevented. Knowledge of the physical demand on the polymer structure and the limit states of the polymer structure (puncture, collapse) are essential to prevent unacceptable performance.