摘要
为了研究生物反应器填埋场中气体压力对沉降的影响,把生物反应器填埋场简化为单向气体渗流场,结合Darcy定律、气体状态方程、有效应力原理和多孔介质流体动力学理论,并假定生物反应器填埋场渗滤液完全回灌,在气体质量守恒的基础上,根据气体消散期间垃圾场内和大气之间的气体压力与填埋场沉降之间的变化关系,建立生物反应器填埋场在气体压力作用下沉降的数值模型.运用有限差分法进行求解.实例分析表明:该模型能够较好地预测生物反应器填埋场的沉降.
To study the influence of gas pressure on the bioreactor landfill settlement, the bioreactor landfill is simplified as a one-dimensional gas seepage field. Incorporating Darcy＇s law, ideal gas law, the principle of effective stress and the theory of fluid dynamics in porous media, it is assumed that the bioreactor landfill leachate can fully infuse circularly into the wastes. Then, based on the conservation of gas mass, a mathematical model is developed for the settlement under the action of gas pressure in a bioreactor landfill according to the relationship between the air pressure difference between atmosphere and piled wastes in landfill and landfill settlement during gas dissipation. A finite difference method is used to solve the model. With an exemplification, the model is verified available to predict well the bioreactor landfill settlement.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第2期277-280,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50709013)
关键词
生物反应器填埋场
气体压力
沉降
生物降解
有限差分法
bioreactor landfill
gas pressure
settlement
biodegradation
finite difference method
