Workshop on Seismic Design of Solid Waste Landfills

9317931马丁新的联邦城市固体废物填埋场设施（MSWLF）最低设计标准于1993年10月9日生效。 这些标准，如EPA（环境保护署）标准中规定的城市固体废物填埋场，包括抗震的最低设计标准。 对于希望评估城市固体废物填埋场设施地震响应的工程师来说，关于城市固体废物容纳系统的动态材料特性或固体废物填埋场在地震荷载作用下的性能的信息很少。 此外，很少有指导可用于建立固体废物密封设施的抗震性能标准。 新的联邦城市固体废物填埋场设施设计标准，称为资源保护和回收法的副标题D，从两个方面影响填埋场的抗震设计。 首先，这些标准要求垃圾填埋场的设计应考虑到在250年内发生10%的水平峰值地面加速度。 这一规定导致设计加速度在加州部分地区超过0.6 g，在美国许多地区超过0.2 g，包括东海岸和美国中部的大片地区。 第二，标准要求垃圾填埋场在底部衬有复合衬垫，该复合衬垫包括土工膜和2英尺厚的土壤层，其渗透率小于10-7厘米/秒。 这一规定实际上保证了填埋场底部的低剪切强度。 在美国西部、中部和东部的许多地区，填埋场底部的高地震激励和低剪切阻力的组合使得地震响应成为填埋场设计的一个重要方面。 一个研讨会正在洛杉矶的南加州地震中心举行，以检查这些新的联邦法规的影响。 讲习班的主要成果将是确定和优先考虑改进固体废物填埋场的地震分析和设计所需的研究。 预计讲习班的成果将通过讲习班参与者之间的信息交流和互动，大大增加关于垃圾填埋场抗震设计和性能的现有知识基础。 研讨会的会议记录将提供一个简明扼要的总结，最先进的，国家的做法，和研究的需要。 ***

9317931 Martin New Federal minimum design standards for Municipal Solid Waste Landfill Facilities (MSWLF) take effect on October 9, 1993. These standards, as specified in the EPA (Environmental Protection Agency) criteria for municipal solid waste landfills, include minimum design standards for seismic resistance. Little information on the dynamic material properties of municipal solid waste containment systems, or on the performance of solid waste landfills subjected to earthquake loading, is available to the engineer wishing to evaluate the seismic response of Municipal Solid Waste Landfill Facilities. Furthermore, little guidance is available for establishing seismic performance criteria for solid waste containment facilities. The new Federal Municipal Solid Waste Landfill Facilities design standards, know as Subtitle D of the Resource Conservation and Recovery Act, impact the seismic design of landfills in two ways. First, the standards require that landfills be designed for a horizontal peak ground acceleration in lithified rock with a probability of exceedance of 10 percent in 250 years. This provision results in design accelerations in excess of 0.6g in parts of California and 0.2g in many areas of the United States, including large areas on the East Coast and in the Central United States. Second, the standards require that landfills be lined at the base with a composite liner that includes a geomembrane and a 2 foot thick layer of soil with a permeability of less that 10-7 centimeters per second. This provision virtually guarantees a low shear strength at the bottom of the landfill. This combination of a high seismic excitation and a low shear resistance at the base of the landfill make consideration of seismic response an important facet of landfill design in many areas of the Western, Central and Eastern United States. A workshop is being held at the Southern California Earthquake Center in Los Angeles to examine the impact of these new Federa l regulations. The primary results of the workshop will be identification and prioritization of research needed to improve seismic analyses and design of solid waste landfills. The results of the workshop are expected to significantly increase the existing knowledge base on seismic design and performance of landfills through the exchange of information and interaction between workshop participants. The proceedings of the workshop will provide a succinct summary of the state of the art, the state of practice, and the research needs. ***