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首页> 外文会议>World conference on earthquake engineering;WCEE >IMPACT OF LARGE VOIDS ON SEISMIC PERFORMANCE OF LANDFILLLINER SYSTEMS
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IMPACT OF LARGE VOIDS ON SEISMIC PERFORMANCE OF LANDFILLLINER SYSTEMS

机译：大气泡对填土系统的抗震性能的影响

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This paper describes ground response analyses carried out for a major landfill in WashingtonState, USA, to assess the behavior of 'refrigerator size' voids, their potential for propagationwithin the landfill, and the resulting forces that could develop in the geomembrane liner. Theanalyses considered the interaction of the liner with its bedding materials and the surroundinglandfill materials. Although the problem is three-dimensional in nature, the analyses presentedhere were carried out assuming two-dimensional conditions. Parametric studies were undertakento assess the liner forces as a function of (a) the depth between the top of the void and the landfillliner and (b) the type of material surrounding the cavity (i.e., cohesionless or cohesive). The2,475-year seismic loading (10% probability in 250 years) was used for the design of the landfillliner system.The results of the numerical simulations indicate that the risk of propagation of the voids underseismic loading conditions is low, and that static loading conditions control the forces thatdevelop in the liner. The forces in the liner were very sensitive to the assumed properties of thematerial surrounding the cavity, increasing by a factor of almost 10 if the waste material had nocohesion.
机译：本文介绍了对美国华盛顿州的一个主要垃圾填埋场进行的地面响应分析，以评估“制冷剂尺寸”空隙的行为，其在填埋场内传播的潜力以及在土工膜衬层中可能产生的合力。分析考虑了衬垫与衬垫材料和周围垃圾填埋材料的相互作用。尽管问题本质上是三维的，但这里介绍的分析是在二维条件下进行的。进行了参数研究以评估衬里力与（a）空隙顶部和垃圾填埋层之间的深度以及（b）空腔周围材料的类型（即无内聚力或内聚力）的关系。 2475年的地震荷载（250年内概率为10％）用于垃圾填埋系统的设计。数值模拟结果表明，在地震荷载条件下孔隙的传播风险较低，而静态荷载条件控制着衬管中产生的力。衬里中的力对腔体周围材料的假定特性非常敏感，如果废料不具有内聚力，则力将增加近10倍。

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