北京市某垃圾卫生填埋场堆山及覆盖工程实例

填埋场堆山及覆盖工程是指垃圾从地面向上填埋作业,至设计标高或填埋场停止使用高度的过程。为避免堆体沉降过大对堆体的稳定造成影响,根据勘察报告对垃圾填埋区进行的沉降分析,利用陈腐垃圾对沉降最大区域进行压实、垫高,保证垃圾堆体压实密度大于0.9;为减少渗沥液的产生保证渗沥液、沼气收集及导排系统安全有效的运行,采用基础构建的方式减少填埋作业面,从而减少雨季雨水的渗入;待堆体形成后,通过在堆体顶部及边坡铺设防渗及导排层对渗沥液和沼气进行疏导和收集,降低渗沥液和沼气对堆体稳定以及周边环境造成的影响,并铺设生态恢复层,美化环境。

A CASE OF ACCUMULATION AND COVER OF A SANITARY LANDFILL IN BEIJING

Accumulation and cover of a sanitary landfill is procedure for a landfill operation raising from ground up to the design elevation or the height of landfill to stop using.In order to avoid the impact on pile stability by the large pile settlement,according to the survey report on the landfill area for settlement analysis,aged refuse should be used in the settlement area for compaction and pad,ensuring that the garbage heap compaction density is greater than 0.9.In order to reduce leachate and ensure the safety running of collecting the leachate,and marsh gas and drainage systems based on the use of construction way of reducing landfill operation,thereby the rainwater infiltration was reduced.After forming the stack,impermeable layer was laid on the top and side slope of the pile to guide and collect leachate and methane,reducing the effect of leachate and methane on pile stability,and its environmental and ecological restoration layer was also laid to beautify the environment.