陡峭边坡条件下生活垃圾卫生填埋场高密度聚乙烯（HDPE）膜拉伸稳定分析

我国西部地区的卫生垃圾填埋场多处于陡峭冲沟之内,难以应用现行《城市生活垃圾卫生填埋技术规范》(CJJ 17—2004)进行HDPE膜锚固工程设计与施工。以甘肃陇南地区某县城陡峭边坡条件下生活垃圾卫生填埋场HDPE膜为研究对象,采用有限元软件MIDAS/GTS数值模拟分析。随着垃圾堆体填筑高度的增加,地基变形与边坡HDPE膜拉伸稳定性变化。计算结果表明:随着垃圾填埋高度的增加,地基变形量较小,最大竖向位移仅为0.4 mm;HDPE膜的应力随着垃圾填埋物填埋高度的增加而增加,最大拉应力发生在底层锚固沟处,为0.62 MPa。

Analysis on Stability of HDPE Geomembrane on Steep Slope in Landfill

The region's sanitary landfills, situated in the west of china, are always set in mountainous gully, so that the Municipal Solid Waste Sanitary Landfill Specification (CJJ17-2004) cannot be used for the design and construction in anchorage engineering of HDPE geomembrane. Based on finite element software, MIDAS/GTS, simulation analysis method, Stability of HDPE geomembrane on Steep Slope in Landfill in a place of Gansu is taken as research object. As landfill content increased in altitude the foundation of deformation and the tensile slope stability of HDOE membrane is investigated. Results show that: As landfill content increased in altitude, the stress of HDPE sheet increased, Maximum settlement is only 0.4 mm. As landfill content increased in altitude, the tensile stress of HDPE sheet increased, Maximum tensile stress occurs at the bottom of anchorage ditch, 0.62 MPa.