城市垃圾填埋场沉降的力学模型研究

STUDY ON MECHANICAL MODEL OF SETTLEMENT IN MUNICIPAL SOLID WASTE LANDFILL

  • 摘要: 从城市垃圾填埋场沉降的机理出发,以经典力学中应力-应变之间的关系为基础,建立起城市垃圾填埋场在载荷、蠕变和生物降解耦合作用下沉降的力学模型,并分别确定在载荷、蠕变和生物降解作用下屈服表面应力增量的表达式. 通过填埋场沉降的实例计算,该模型得到了较为满意的预测结果.

     

    Abstract: Landfill is a cost-effective method for urban wastedisposal. Prediction of landfill settlement is the most essential issuein order to increase the municipal solid waste landfill capacity and improvethe utilization of landfill. In this paper, a mechanical model of thesettlement under the combined action of load, creep and biodegradationis proposed based on the settlement mechanism of municipal solid wastelandfill and the relationship between stress and strain in classical mechanics.The expression of yield surface stress increment is obtained under load,creep and biodegradation. The example computed oflandfill settlement shows that the model is satisfactory in forecasting.

     

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