现代卫生垃圾填埋场组合破坏的研究

Study on the Combined Destruction of Modern Landfills

为了提高垃圾填埋场的稳定性,减小安全事故的发生,建立了垃圾填埋场组合破坏模型,使用等弧长条分法建立安全系数解析式,并采用matlab程序语言编制程序Comslope进行求解,研究了不同参数情况下,组合破坏的安全系数与平移破坏长度的关系,以及垃圾坝几何参数和垃圾土力学参数对组合破坏的最小安全系数的影响,结果表明,当安全系数FS取得最小值时,组合破坏平移部分水平距离M>0,此时组合破坏先于圆弧破坏发生,证明有发生组合破坏的可能性。研究证明,组合破坏的安全系数与平移破坏长度、垃圾坝几何参数、垃圾土力学参数密切相关。基于各参数对安全系数FS的影响,提出了关于填埋场设计、填埋场施工衬垫选用以及垃圾填埋过程中垃圾土的处理措施和建议。

In order to improve the stability of the landill site and reduce the occurrence of safety accidents,the combined destruction model of the landfll site was established.The analytic formula of the safety factor was established by the method of equal arc length,and the program Comslope was developed by MATLAB programming language to solve the problem.Under different parameter condition,the relationship between the safety factor of the combined destruction and the translational destruction length,and the influence of the geometrical parameters of refuse dam and the mechanical parameters of refuse soil on the minimum safety factor of combined destruction were studied.The results showed that when the safety factor FS reached the minimum value,the horizontal distance of the translation part of the combined destruction M>O,and the combined destruction occurred before the arc destruction occurred,which proves that the combined destruction is possible.Studies have shown that the safety factor of combined destruction is closely related to the translational destruction length,the geometric parameters of the landfill dam,and the mechanical parameters of the MSW.Based on the influence of each parameter on the safety factor FS,the paper puts forward some suggestions on the design of the landfill site,the selection of the construction liner of the landfill site and the treatment of the waste soil in the process of the landfill.