污泥-生活垃圾混合填埋体抗剪强度特性研究
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摘要
污泥送入生活垃圾填埋场进行混合填埋是国内外常用的处置途径之一。混合填埋体强度参数对填埋场稳定性有重要影响,为此在实验室开展了不同击实功、不同污泥添加量以及不同生化降解时间条件下污泥-生活垃圾混合试样的强度试验,对其强度特性进行研究。结果表明:①随着击实功的增加,混合试样的抗剪强度整体上逐渐增大,当其密度超过1 050 kg/m~3时,混合试样的内摩擦角和凝聚力增加不明显甚至有减小现象,其抗剪强度增加幅度很小甚至减小。②随着污泥添加量的增加,混合试样的内摩擦角逐渐减小,凝聚力逐渐增加,但是当污泥添加量超过40%时,其凝聚力反而减小。③随着生化降解的进行,混合试样抗剪强度整体趋势在增加,凝聚力和内摩擦角的整体趋势也在增加。
At present, sludge is transported to landfill site for disposal. The strength parameters of mixed landfill body of sludge and house refuse have important influence on the stability of landfills. Strength tests of mixed landfills with different compaction work, different sludge additions and different bio-degradation duration were conducted. The results are as follow:(1) With the increase of compaction work, the shear strength of the landfill sample gradually increased. The internal friction angle(φ) and the cohesion force(c) of the mixed landfill body increased slowly and even decreased when the density of landfill exceeded 1050 kg/m~3.(2) With the increasing of sludge addition, the cohesion force(c) increased, and the internal friction angle(φ) decreased gradually, however, the cohesive force(c) showed contrary trend when the sludge addition exceeded 40%.(3)With the action of bio-degradation, the shear strength of landfill increased in general.
At present, sludge is transported to landfill site for disposal. The strength parameters of mixed landfill body of sludge and house refuse have important influence on the stability of landfills. Strength tests of mixed landfills with different compaction work, different sludge additions and different bio-degradation duration were conducted. The results are as follow:(1) With the increase of compaction work, the shear strength of the landfill sample gradually increased. The internal friction angle(φ) and the cohesion force(c) of the mixed landfill body increased slowly and even decreased when the density of landfill exceeded 1050 kg/m~3.(2) With the increasing of sludge addition, the cohesion force(c) increased, and the internal friction angle(φ) decreased gradually, however, the cohesive force(c) showed contrary trend when the sludge addition exceeded 40%.(3)With the action of bio-degradation, the shear strength of landfill increased in general.
引文
[1] 张灿,陈虹,余忆玄,等.我国沿海地区城镇污水处理厂污泥重金属污染状况及其处置分析[J].环境科学,2013,34(4):1345-1350.
[2] 薛飞,王佩,李磊,等.污泥固化土强度特性研究[J].人民长江,2018,49(17) :81-86.
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[13] Li X L,Shi J Y.Stress-strain behaviour and shear strength of Municipal Solid Waste (MSW)[J].Journal of Civil Engineering,2016,20(5):1747-1758.
[14] O’Kelly B C.Geotechnical properties of municipal sewage sludge[J].Geotechnical and Geological Engineering,2006,24(4):833.
[15] 胡亚东.有机质降解规律及对垃圾土变形影响的研究[D].南京:河海大学,2006.
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[17] O’Kelly B C.Effect of biodegradation on the consolidation properties of a dewatered municipal sewage sludge[J].Waste Management,2008,28(8):1395-1405.
[18] 张振营,严立俊,吴大志.城市新鲜垃圾抗剪强度参数模型研究[J].岩石力学与工程学报,2015,34(9):1938-1944.
[19] 刘松玉,韩文君,章定文,等.劈裂真空法加固软土地基试验研究[J].岩土工程学报,2012,34(4):591-599.
[20] 鲍树峰,娄炎,董志良,等.新近吹填淤泥地基真空固结失效原因分析及对策[J].岩土工程学报,2014,36(7):591-599.
[21] 钱学德,郭志平,施建勇,等,现代卫生填埋场的设计与施工[M].北京:中国建筑工业出版社,2001.
[22] Yuan P B,Kavazanjian E J,Chen W W,et al.Compositional effects on the dynamic properties of municipal solid waste[J].Waste Management,2011,31(12):2380-2390.
[23] Fei X C,Zekkos,D Raskin L.An experimental setup for simultaneous physical,geotechnical,and biochemical characterization of municipal solid waste undergoing biodegradation in the laboratory[J].ASTM Geotechnical Testing Journal,2014,37(1):1-12.
[24] 中华人民共和国住房和城乡建设部.城镇污水处理厂污泥处置混合填埋用泥质:GB/T23485-2009[S].北京:中国标准出版社,2009.
[25] 张振营,严立俊.城市新鲜生活垃圾变形与强度的关联特性[J].浙江大学学报(工学版),2014,48(11):1962-1967.
[26] 刘晓东,施建勇,高海.降解对垃圾土压缩回弹特性的影响[J].深圳大学学报(理工版),2011,28(6):535-540.
[27] 旦增顿珠,介玉新,魏弋峰,等.垃圾土的强度特性试验研究[J].清华大学学报(自然科学版),2006(9):1538-1541.
[2] 薛飞,王佩,李磊,等.污泥固化土强度特性研究[J].人民长江,2018,49(17) :81-86.
[3] 易进翔.污泥-生活垃圾混合填埋体生化降解下的强度演化及填埋场的稳定性研究[D].南京:河海大学,2017.
[4] 赵乐军,戴树桂,辜显华.污泥填埋技术应用进展[J].中国给水排水,2004,20(4) :27-30.
[5] 李磊,徐菲,周灵君,等.固化污泥压缩特性研究[J].岩土工程学报,2015(1):171-176.
[6] 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.
[7] 杨春宝.填埋场变形与稳定离心模型试验研究[D].杭州:浙江大学,2013.
[8] 赵由才,张华,黄仁华,等.不同改性剂改善污泥土工性质的比较研究[J].环境污染与防治,2010,32(1):35-39.
[9] 施建勇,王娟.污泥掺入生活垃圾后的力学特性试验研究[J].岩土力学,2012,33(11):13-17.
[10] 于小娟.污泥与城市生活垃圾混填的力学特性及稳定性[J].土木建筑与环境工程,2016,38(3):80-89.
[11] Reddy K R,Gangathulasi J,Parakalla N S,el al.Compressibility and shear strength of municipal solid waste under short-term leachate recirculation operations[J].Waste Management & Research,2009,27(6):578-587.
[12] 陈云敏,林伟岸,詹良通,等.城市生活垃圾抗剪强度与填埋龄期关系的试验研究[J].土木工程学报,2009,42(3):111-117.
[13] Li X L,Shi J Y.Stress-strain behaviour and shear strength of Municipal Solid Waste (MSW)[J].Journal of Civil Engineering,2016,20(5):1747-1758.
[14] O’Kelly B C.Geotechnical properties of municipal sewage sludge[J].Geotechnical and Geological Engineering,2006,24(4):833.
[15] 胡亚东.有机质降解规律及对垃圾土变形影响的研究[D].南京:河海大学,2006.
[16] 李磊,朱伟,吉顺健,等.微生物对固化/稳定化污泥长期强度的影响研究[J].岩土工程学报,2008,30(12):1778-1782.
[17] O’Kelly B C.Effect of biodegradation on the consolidation properties of a dewatered municipal sewage sludge[J].Waste Management,2008,28(8):1395-1405.
[18] 张振营,严立俊,吴大志.城市新鲜垃圾抗剪强度参数模型研究[J].岩石力学与工程学报,2015,34(9):1938-1944.
[19] 刘松玉,韩文君,章定文,等.劈裂真空法加固软土地基试验研究[J].岩土工程学报,2012,34(4):591-599.
[20] 鲍树峰,娄炎,董志良,等.新近吹填淤泥地基真空固结失效原因分析及对策[J].岩土工程学报,2014,36(7):591-599.
[21] 钱学德,郭志平,施建勇,等,现代卫生填埋场的设计与施工[M].北京:中国建筑工业出版社,2001.
[22] Yuan P B,Kavazanjian E J,Chen W W,et al.Compositional effects on the dynamic properties of municipal solid waste[J].Waste Management,2011,31(12):2380-2390.
[23] Fei X C,Zekkos,D Raskin L.An experimental setup for simultaneous physical,geotechnical,and biochemical characterization of municipal solid waste undergoing biodegradation in the laboratory[J].ASTM Geotechnical Testing Journal,2014,37(1):1-12.
[24] 中华人民共和国住房和城乡建设部.城镇污水处理厂污泥处置混合填埋用泥质:GB/T23485-2009[S].北京:中国标准出版社,2009.
[25] 张振营,严立俊.城市新鲜生活垃圾变形与强度的关联特性[J].浙江大学学报(工学版),2014,48(11):1962-1967.
[26] 刘晓东,施建勇,高海.降解对垃圾土压缩回弹特性的影响[J].深圳大学学报(理工版),2011,28(6):535-540.
[27] 旦增顿珠,介玉新,魏弋峰,等.垃圾土的强度特性试验研究[J].清华大学学报(自然科学版),2006(9):1538-1541.
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