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强度折减弹塑性有限元法经常被用于边坡稳定分析中,而用于固废填埋场稳定性分析中的目前并不多见。本文对考虑衬垫系统的固废填埋场稳定性进行数值模拟,所得结果与极限分析上限法的分析结果基本一致,验证了本文分析方法的有效性。分析表明,当固废填埋场堆体长度小于一定值时,安全系数随着堆体长度的增大而增大,当填埋体长度超过一定值后,填埋场的安全系数不再变化;随着填埋体长度的增大,填埋体的破坏模式从开始的平动-平动组合破坏模式,变为最后的转动-平动组合破坏模式。
Strength reduction elasto-plastic finite element method is often used in slope stability analysis, and used in solid waste landfill stability analysis is not uncommon at present. In this paper, the stability of solid waste landfill considering the liner system is numerically simulated. The results are basically the same as those of the upper limit analysis method, which proves the effectiveness of the method proposed in this paper. The analysis shows that when the length of the solid waste landfill body is less than a certain value, the safety factor increases with the length of the pile body. When the landfill length exceeds a certain value, the safety factor of the landfill land will no longer change With the increase of landfill length, the failure mode of landfill body changes from the initial translational-translational failure mode to the final rotation-translational failure mode.