Abstract:

At the present, it is the main disposal method in China that municipal solid waste incineration fly ash was first solidified and stabilized, and then sent to a municipal solid waste sanitary landfill for compartmentalized landfill. However, in engineering practice, the stacking slope ratio of fly ash often follows the ratio of 1:3 that is more suitable for municipal solid waste, and the landfill storage capacity has not been maximally utilized. The stability of fly ash slope and final cover under different slope ratio was analyzed, and the influence of length-width ratio and area of landfill reservoir on the storage capacity. The research results show that based on the  geotechnical properties of fly ash itself, the designed value of the stacking slope ratio of fly ash can be adjusted from 1:3 to 1:2, or even to 1:1, thus significantly increasing the storage capacity of the fly ash landfill. Considering the stability of the final cover layer of the fly ash landfill after its closure, the recommended stacking slope ratio of fly ash is 1:2. The storage capacity of the fly ash landfill decreases as the length-width ratio of the landfill area increases, and the smaller the area of the landfill area, the greater the decrease in the storage capacity.

Key words: domestic waste incineration fly ash')">

domestic waste incineration fly ash, compartmentalized landfill, stability, slope ratio, length-width ratio, storage capacity