污泥填埋库区竖向堆高增容中试试验研究

Pilot Test Study on Vertical Expansion in Sludge Landfill Area

针对上海市60%含水率污泥的填埋容量不足的问题,探索老港综合填埋场污泥填埋库区竖向堆高增容的关键技术问题。实施了中试试验,通过原位加固、土工格栅“蜂窝状”加固,提升已填埋污泥的强度和承载力;通过高强土工布分层加筋,提升竖向堆高污泥堆体的强度和稳定性,成功实现了竖向堆高10m作业。基于中试试验结果给出了稳定评估验算时各类污泥土体强度的建议取值,并提出了竖向堆高增容的设计思路。

Aiming at the problem of insufficient landfill capacity of sludge with 60%moisture content in Shanghai,the key technical problems of increasing the capacity of sludge landfill in Laogang comprehensive landfill were explored.The pilot test study was carried out to improve the strength and bearing capacity of the buried sludge through in-situ reinforcement and honeycomb reinforcement of the geo-grid.The strength and stability of the vertical expanded pile body was improved through layered reinforcement of high-strength geo-textiles,which successfully achieved the vertical expanded height of 10 m.Based on the results of the pilot test,the values of soil strength of various kinds of sludge during the stability calculation were suggested,and some advices of vertical expansion for sludge in landfill were given.