Method and Practice of 100-meter Landfill Vertical Expansion:A Case Study of a Landfill in Chengdu
As land resources are scarce,there is no available space to construct new landfills,landfill expansion has become an important means of solving the shortage of storage capacity.A design concept for landfill expansion was proposed in this study.It determined the feasibility of expansion based on on-site monitoring and pile stability analysis.Different technical selection schemes for different capacity increments were presented.Stability calculations of increased capacity piles for each scheme were conducted.These calculations were combined with requirements for stability control measures,investment factors,and others to finalize the expansion plan.Taking a landfill in Chengdu as an example,the current pile had a general stability safety factor of 1.794 to 1.881,indicating the feasibility of expansion.Technical selection scheme one achieved an increase of 1.2 million cubic meters,with the general stability safety factor of the increased capacity pile ranging from 1.481 to 1.713 after the expansion.Technical selection scheme two achieved an increase of 0.8 million cubic meters,with the general stability safety factor of the increased capacity pile after the expansion being 1.696 to 1.784.After adopting appropriate stability control measures,scheme one was selected for implementation.
extension to increase capacitystability analysisfield monitoringstability control measures
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