某生活垃圾填埋场堆体稳定性分析及工程治理措施研究

Study on stability analysis and engineering treatment measures of a domestic waste landfill

以南方某生活垃圾填埋场为例,通过工程勘察堆体的水位、位移、局部气压等,验算垃圾堆体的稳定系数和分析局部失稳的原因。经研究表明垃圾堆体整体处于稳定状态,但填埋场长年超负荷运行导致堆体主水位壅高、滞水位偏高和局部高气压,局部边坡区域处于滑移的临界状态。对此建议设置大口径降水竖井、小口径应急井、水平导排盲沟和修整加固边坡等工程措施,提高填埋堆体的稳定性。

Taking a domestic garbage landfill site in the south as an example,the water level,displacement and local air pressure of the pile body were surveyed by the project,and the stability coefficient of the garbage pile body was checked and the reasons for local instability were analyzed.The study showed that the overall garbage dump is in a stable state,but the overload operation of the landfill site for many years leads to the high main water level,high stagnant water level and local high air pressure,and the local slope area is in a critical state of slippage.For this reason,it is suggested to set up engineering measures such as large-caliber precipitation shaft,small-caliber emergency shaft,horizontal guide and drainage blind ditch,and repair and reinforcement of slope to improve the stability of landfill.