山谷型垃圾填埋场失稳后的远程流动模型
|
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。
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.
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.
引文
[1]何晟,兰吉武,詹良通.南方山谷型填埋场渗滤液产量及水位控制措施[J].中国给水排水,2010,26(8):1-5(He Sheng,Lan Jiwu,Zhan Liangtong.Control measurefor leachate generation rate and leachate level at valley-typelandfills in south China[J].China Water&Wastewater,2010,26(8):1-5(in Chinese))
[2]杭州市第二填埋场水文地质工程地质勘测报告[R].浙江:浙江省工程物探勘察院,2002
[3]Koerner R M,Soong T Y.Stability assessment of ten largelandfill failures[C]//Advances in Transportation andGeoenvironmental Systems Using Geosynthetics,ASCEGeotechnical Special Publication,2000:1-38
[4]Merry S M,Kavazanjian E,Fritz W U.Reconnaissance ofthe July 10,2000,Payatas landfill failure[J].Journal ofPerformance of Constructed Facilities,2005,19(2):100-107
[5]Hendron D M.Large landslide risks in solid waste facilitiesgeotechnical fundamentals count[J].Geo-Strata,2006,6(2):32-34
[6]陈云敏,高登,朱斌,等.垃圾填埋场沿衬垫界面的地震稳定性及永久位移分析[J].中国科学E辑,2008,38(1):79-94(Chen Yunmin,Gao Deng,Zhu Bin,et al.Stability and permanent displacements analysis of wastelandfills along the underlying liner surface duringEarthquake[J].Science in China E,2008,38(1):79-94(in Chinese))
[7]冯世进,陈云敏,高广运.垃圾填埋场沿底部衬垫系统破坏的稳定性分析[J].岩土工程学报,2007,29(1):20-25(Feng Shijin,Chen Yunmin,Gao Guangyun.Analysis on translational failure of landfill along theunderlying liner system[J].Chinese Journal of GeotechnicalEngineering,2007,29(1):20-25(in Chinese))
[8]王光谦,邵颂东,费祥俊.泥石流模拟:I——模型[J].泥沙研究,1998(3):7-13(Wang Guangqian,Shao Songdong,Fei Xiangjun.Simulation of debris flow:I—model[J].Journal of Sediment Research,1998(3):7-13(inChinese))
[9]O’brien J S,Julien P Y,Fullerton W T.Two-dimensionalwater flood and mudflow simulation[J].Journal ofHydraulic Engineering,1993,119(2):244-261
[10]胡健,匡尚富,徐永年.二维非恒定粘性泥石流运动堆积的数值模拟[J].泥沙研究,2006(6):60-64(HuJian,Kuang Shangfu,Xu Yongnian.2-D numericalsimulation of viscous debris flows[J].Journal of SedimentResearch,2006(6):60-64(in Chinese))
[2]杭州市第二填埋场水文地质工程地质勘测报告[R].浙江:浙江省工程物探勘察院,2002
[3]Koerner R M,Soong T Y.Stability assessment of ten largelandfill failures[C]//Advances in Transportation andGeoenvironmental Systems Using Geosynthetics,ASCEGeotechnical Special Publication,2000:1-38
[4]Merry S M,Kavazanjian E,Fritz W U.Reconnaissance ofthe July 10,2000,Payatas landfill failure[J].Journal ofPerformance of Constructed Facilities,2005,19(2):100-107
[5]Hendron D M.Large landslide risks in solid waste facilitiesgeotechnical fundamentals count[J].Geo-Strata,2006,6(2):32-34
[6]陈云敏,高登,朱斌,等.垃圾填埋场沿衬垫界面的地震稳定性及永久位移分析[J].中国科学E辑,2008,38(1):79-94(Chen Yunmin,Gao Deng,Zhu Bin,et al.Stability and permanent displacements analysis of wastelandfills along the underlying liner surface duringEarthquake[J].Science in China E,2008,38(1):79-94(in Chinese))
[7]冯世进,陈云敏,高广运.垃圾填埋场沿底部衬垫系统破坏的稳定性分析[J].岩土工程学报,2007,29(1):20-25(Feng Shijin,Chen Yunmin,Gao Guangyun.Analysis on translational failure of landfill along theunderlying liner system[J].Chinese Journal of GeotechnicalEngineering,2007,29(1):20-25(in Chinese))
[8]王光谦,邵颂东,费祥俊.泥石流模拟:I——模型[J].泥沙研究,1998(3):7-13(Wang Guangqian,Shao Songdong,Fei Xiangjun.Simulation of debris flow:I—model[J].Journal of Sediment Research,1998(3):7-13(inChinese))
[9]O’brien J S,Julien P Y,Fullerton W T.Two-dimensionalwater flood and mudflow simulation[J].Journal ofHydraulic Engineering,1993,119(2):244-261
[10]胡健,匡尚富,徐永年.二维非恒定粘性泥石流运动堆积的数值模拟[J].泥沙研究,2006(6):60-64(HuJian,Kuang Shangfu,Xu Yongnian.2-D numericalsimulation of viscous debris flows[J].Journal of SedimentResearch,2006(6):60-64(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心