垃圾填埋场边坡动力响应时程分析

Time History Analysis for the Seismic Response of Landfill Slope

随着城市化建设和新农村建设进程的提速,对环境的要求也更高。目前,设置垃圾填埋场仍是处置城市生活垃圾的一种行之有效且最常用的方法。填埋场边坡与其它自然边坡和人工边坡一样,也存在边坡稳定问题,针对锡塘垃圾填埋场边坡工程实际,基于时程分析法对填埋场边坡的动力响应进行了分析,采用等效线性化方法考虑垃圾填埋体的非线性动力响应特性。为充分反映地震动特性对填埋场动力响应的影响,地震动输入采用三条实测波和一条人工地震波。分析结果表明,不同地震波对填埋场地震响应有显著差异,在对实际填埋场抗震设计时,至少应选择两条实测波加一条人工合成地震波作为输入地震波,这样才能较好反映填埋场动力响应特性。

With the acceleration of urbanization and new rural construction process ,environmental requirements are also raised .At present ,building landfills to dispose of municipal solid waste is still an effective and most commonly used method .Landfill slopes have the same stability problems with other natural and manmade slopes .According to the engi-neering practice of municipal solid waste landfills ,based on the analysis of time history for dynamic response of landfills slope ,the equivalent linearization method was used to study the non-linear dynamic response characteristics of the waste in the landfill .In order to fully reflect the impact of the seismic motion characteristics on the dynamic response of the landfill ,three actual recorded waves and an synthetic wave were input as seismic motions .The result indicates that there are significant differences on the seimic response of landfills according to the input of different seismic waves .When con-ducting seismic design of the actual landfill sites ,there should be at least 2 actual waves and one synthetic wave as input waves to better reflect the landfill dynamic response characteristics .