干污泥高维填埋的堆体边坡稳定性模拟与分析

污泥高维填埋可以解决污泥产量剧增与填埋用地紧张的矛盾，但污泥混合高维填埋的边坡稳定性需进一步考证.本文以抗压强度和抗剪强度均较强的含水率60%左右的干污泥为研究对象，采用GEO-SLOPE软件对污泥高维填埋堆体稳定性进行模拟分析，发现填埋放坡坡度越缓，堆体稳定性越强，所允许的最大填埋高度相应越高，库容增加量越大；填埋高度越高，堆体稳定性越差；以上海老港填埋场为例，填埋单元的最佳放坡坡度为1：3.5，相应的最大允许填埋高度为28m，库容增加量为447.2万m³.

Slope stability simulation of dry sludge pile in high-dimensional landfill operation

High-dimensional landfill can resolve the conflict between increased amounts of sewage sludge and landfill land demand. However, slope stability of the sludge pile by high-dimensional landfill operation remains unclear. Dry sludge, which has a relatively low moisture content (60%), high compressive strengths and hear strength, was landfilled and simulated with the GEO-SLOPE software in our research. Results showed that a smaller landfill slope gradient enhanced the stability of sludge pile, and correspondingly led to a higher allowable landfill height and a larger increase of the capacity. The optimal slope gradient of Laogang simulated landfill unit may be 1:3.5, correspondingly the maximum allowable landfill height evaluated to be 28 m with an increase of the capacity of 4.472 million m³.