【摘要】 对于山谷型垃圾填埋场,若填埋场内渗滤液水位过高,失稳以后的破坏形式表现为液相(渗滤液)携带固相(垃圾)的远程流动,其形式类似于泥石流。以固液结构二相流理论为基础,根据质量守恒和Naiver-Stokes方程,建立了垃圾流的远程流动分析模型,并给出垃圾流的初始条件、边界条件和停积条件。该模型可采用有限差分法进行离散求解。同时,采用该模型对某高渗滤液水头下山谷型垃圾填埋场失稳后的远程流动现象进行模拟,模拟结果显示该垃圾流持续时间为22s,下游最大流动距离为315m。更多还原

【Abstract】 If the leachate level is excessively high in valley-type landfill,the failure mode is long range flow with liquid phase(leachate) carrying solid phase(waste body) after landfill loses stability,which is similar to mud flow.Based on two-phase flow theory,conservation of mass and Naiver-Stokes equations,the mathematical model of waste mass flow has been established,and the initial conditions,the boundary conditions and the storage condition of waste body flow have been given.The discretization model can be established by finite difference.Finally,the long range flow of one valley-type landfill after it lost stability with high leachate level has been simulated by this model.The results show the lasting time of waste flow is twenty-two seconds,and the maxium distance of the flow downstream is three hundred and fifteen meters.更多还原