东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (10): 1495-1498.DOI: -

• 资源与土木工程 • 上一篇    下一篇

生物降解下垃圾填埋场的边坡稳定性

邱纲1，梁力1，孙洪军2   

  1. (1.东北大学资源与土木工程学院，辽宁沈阳110819；2.辽宁工业大学土木建筑工程学院，辽宁锦州121001)
  • 收稿日期:2013-04-23 修回日期:2013-04-23 出版日期:2013-10-15 发布日期:2013-05-24
  • 通讯作者: 邱纲
  • 作者简介:邱纲(1972-)，男，辽宁抚顺人，东北大学博士研究生，辽宁工业大学副教授；梁力(1955-)，男，辽宁丹东人，东北大学教授，博士生导师.
  • 基金资助:
    辽宁省博士启动基金资助项目(20131046).

Slope Stability of Landfill Under Biodegradation

QIU Gang1， LIANG Li1， SUN Hongjun2   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. College of Civil Engineering & Architecture， Liaoning University of Technology， Jinzhou 121001， China.
  • Received:2013-04-23 Revised:2013-04-23 Online:2013-10-15 Published:2013-05-24
  • Contact: QIU Gang
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摘要： 为研究垃圾体生物降解对填埋场边坡稳定性的影响，考虑垃圾体的物理和机械特性随着时间和降解程度的变化，将填埋场分为5个不同的降解区域，每个区域存在不同的黏聚力和内摩擦角.通过建立有限差分法的数值模型，利用FLAC3D求解填埋场的安全系数，分析垃圾场边坡稳定的破坏机理.通过实例对填埋场的边坡稳定进行分析，得到该数值方法的计算结果低于极限平衡法的计算结果，该方法可以预测填埋场在复杂边界条件下的局部失稳破坏和边坡位移过大导致的破坏，同时更有利于边坡稳定的应力-应变破坏机理的分析.

关键词: 填埋场, 边坡稳定, 生物降解, FLAC3D, 有限元差分法

Abstract: In consideration of the change of physical and mechanical properties of waste body with the time and the degree of degradation， the landfill was divided into five different degradation areas， different cohesions and internal friction angles were specified in order to study the influence of the biodegradation of waste body on landfill slope stability. The safety factor of the landfill site was calculated using FLAC3D， and the failure mechanism of landfill slope stability was analyzed. The landfill slope stability was examined through a couple of instances， and the calculation result of the numerical method is lower than the result with the limit equilibrium method. This method can predict the local bucking failure of landfill under complex boundary conditions and the failure caused by extremely big displacement of slope. And it should be more useful for the analysis of the stressstrain failure mechanism.

Key words: landfill, slope stability, biodegradation, FLAC3D, finite difference method.

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