王艳明1,
熊建英1,
林伟岸2
1.上海市政工程设计研究总院集团有限公司,上海 200092
2.浙江大学软弱土与环境土工教育部重点实验室,杭州 310058
Practice of in-situ remediation of sludge pits in landfill
LUO Xiaoyong1,,WANG Yanming1,
XIONG Jianying1,
LIN Weian2
1.Shanghai Municipal Engineering Design Institute Group Co.Ltd.,Shanghai 200092, China
2.Key Laboratory of Soft Soils and Geo-Environmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310058, China
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摘要:垃圾填埋场内污泥坑的存在严重影响填埋场竖向扩建和填埋堆高。对某垃圾填埋场内污泥坑进行现场勘察取样、原位测试与室内实验,获得污泥的分层及沿深度变化的物理、力学特性,并针对不同分层的污泥,提出表层垃圾清除、污水抽排、泥水混合污泥土工管袋脱水、流塑、软塑污泥原位固化综合处理方法。对污泥坑抽排污水过程中垃圾堆体边坡进行渗流稳定分析,发现渗滤液水位快速下降将导致污泥坑垃圾边坡滑移失稳,在污泥坑治理过程中应采取相应措施。根据污泥坑上覆80~120 m垃圾堆体沿原位固化污泥滑移稳定分析,获得污泥坑原位固化处理强度指标,不排水抗剪强度Cu为40 kPa。
关键词: 垃圾填埋场/
污泥坑/
土工管袋脱水/
原位固化/
边坡稳定
Abstract:Sludge pit in landfills significantly affects vertical expansion and height of landfills. Field sampling, in-situ testing and laboratory testing were performed for sludge pits in a landfill to obtain physical and mechanical characteristics of the stratification and depth change of the sludge. Surface waste removal, sewage pumping, sludge-water mixed sludge tube dewatering, in-situ solidification were proposed for this site. Seepage stability analysis was carried out for the sludge pits during sludge pumping. It was found that rapid decline of leachate level would cause sludge pit slope instability and measures should been taken during the sludge pit treatment. According to the stability analysis of in-situ solidified sludge overlain by 80 to 120 m wastes, the in-situ solidification strength of the sludge pit was obtained, the undrained shear strength should not be less than 40 kPa.
Key words:landfill/
sludge pit/
geotextile bag dehydration/
in situ solidification/
slope stability.
[1] | 李滨丹,孙明宇. 探析城市污泥填埋处置的发展趋势研究[J].环境科学与管理,2014,39(4):89-91 |
[2] | 曹永华.市政污泥的固化填埋处理研究[D].天津:天津大学,2005 |
[3] | 詹良通,罗小勇,管仁秋,等. 某垃圾填埋场污泥坑外涌及其引发下游堆体失稳机理[J]. 岩土工程学报, 2013, 35(7):1189-1196 |
[4] | 朱伟,吉顺健,李磊,等.污泥固化/稳定化技术现场试验研究[J]. 环境科学与技术,2009,32(5):131-137 |
[5] | 郑修军,朱伟,李磊,等.污泥固化材料优选试验研究[J]. 岩土力学,2008,29(s1):571-574 |
[6] | 张会文,朱伟,包建平,等.污泥原位固化-稳定化处理中试研究[J].环境工程,2014,31(8):101-104 |
[7] | 罗小勇.处置库污泥工程特性测试及其对垃圾堆体稳定性影响评估[D].杭州:浙江大学, 2011 |
[8] | 冯源,罗小勇,詹良通,等.处置库污泥工程特性测试研究[J].岩石力学,2013,34(1):115-122 |
[9] | 中华人民共和国建设部.岩土工程勘察规范:GB 50021-2001[S]. 北京:中国建筑工业出版社,2009 |
[10] | 董晶,费义昆,梁佳斌.土工管袋污泥脱水工程的设计注意事项[J].环境科技,2014,27(1):38-41 |
[11] | 毛华臻.市政污泥水分分布特性和物理化学调理脱水的机理研究[D].杭州:浙江大学,2016 |
[12] | 王鑫.调理剂对生活污泥脱水性能影响的研究[M].长沙:中南大学,2012 |
[13] | 甑胜利,刘博,陈三林,等.一种污泥原位固化和稳定化的固化剂及其制备方法和应用: CN105217925A[P]. 2016-01-06 |
[14] | 中华人民共和国住房和城乡建设部.生活垃圾卫生填埋场岩土工程技术规范:CJJ 176-2012[S]. 北京:中国建筑工业出版社,2012 |
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垃圾填埋场污泥坑原位修复工程实践
罗小勇1,,王艳明1,
熊建英1,
林伟岸2
1.上海市政工程设计研究总院集团有限公司,上海 200092
2.浙江大学软弱土与环境土工教育部重点实验室,杭州 310058
基金项目:
关键词: 垃圾填埋场/
污泥坑/
土工管袋脱水/
原位固化/
边坡稳定
摘要:垃圾填埋场内污泥坑的存在严重影响填埋场竖向扩建和填埋堆高。对某垃圾填埋场内污泥坑进行现场勘察取样、原位测试与室内实验,获得污泥的分层及沿深度变化的物理、力学特性,并针对不同分层的污泥,提出表层垃圾清除、污水抽排、泥水混合污泥土工管袋脱水、流塑、软塑污泥原位固化综合处理方法。对污泥坑抽排污水过程中垃圾堆体边坡进行渗流稳定分析,发现渗滤液水位快速下降将导致污泥坑垃圾边坡滑移失稳,在污泥坑治理过程中应采取相应措施。根据污泥坑上覆80~120 m垃圾堆体沿原位固化污泥滑移稳定分析,获得污泥坑原位固化处理强度指标,不排水抗剪强度Cu为40 kPa。
English Abstract
Practice of in-situ remediation of sludge pits in landfill
LUO Xiaoyong1,,WANG Yanming1,
XIONG Jianying1,
LIN Weian2
1.Shanghai Municipal Engineering Design Institute Group Co.Ltd.,Shanghai 200092, China
2.Key Laboratory of Soft Soils and Geo-Environmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310058, China
Keywords: landfill/
sludge pit/
geotextile bag dehydration/
in situ solidification/
slope stability
Abstract:Sludge pit in landfills significantly affects vertical expansion and height of landfills. Field sampling, in-situ testing and laboratory testing were performed for sludge pits in a landfill to obtain physical and mechanical characteristics of the stratification and depth change of the sludge. Surface waste removal, sewage pumping, sludge-water mixed sludge tube dewatering, in-situ solidification were proposed for this site. Seepage stability analysis was carried out for the sludge pits during sludge pumping. It was found that rapid decline of leachate level would cause sludge pit slope instability and measures should been taken during the sludge pit treatment. According to the stability analysis of in-situ solidified sludge overlain by 80 to 120 m wastes, the in-situ solidification strength of the sludge pit was obtained, the undrained shear strength should not be less than 40 kPa.