城市垃圾卫生填埋场垂直防渗技术陈永贵

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陈永贵1,2, 邹银生1, 张可能3, 邓飞跃4(1.湖南大学土木工程学院,湖南长沙410082;2.长沙理工大学岩土工程研究所,湖南长沙410076;3.中南大学地学与环境工程学院,湖南长沙410083;4.中南大学化学化工学院,湖南长沙410083)   : 针对城市垃圾卫生填埋场渗滤液成分复杂、浓度高、污染性强的特点,分析了在卫生填埋场构筑防渗系统的功能要求,根据粘土固化浆液的组成特征和固化机理,研究了粘土固化注浆帷幕对渗滤液的抗渗性能和对污染物质的吸附特性,结合粘土固化注浆帷幕在卫生填埋场防渗工程中的应用实例,从施工质量检测、防渗效果监测和技术经济角度,证明了这种垂直防渗技术应用在垃圾填埋场的可靠性和经济性。  : 填埋场; 渗滤液; 垂直防渗; 粘土固化注浆帷幕:X703.1  :C  :1000-4602(2007)06-0095-04VerticalAnti-seepageTechnologyforMunicipalSanitaryLandfillSiteCHENYong-gui1,2, ZOUYin-sheng1, ZHANGKe-neng3, DENGFei-yue4(1.SchoolofCivilEngineering,HunanUniversity,Changsha410082,China;2.InstituteofGeotechnicalEngineering,ChangshaUniversityofScienceandTechnology,Changsha410076,China;3.SchoolofGeoscienceandEnvironmentalEngineering,CentralSouthUniversity,Changsha410083,China;4.SchoolofChemistryandChemicalEngineering,CentralSouthUniversity,Changsha410083,China)  Abstract: Aimedatthecomplicacyofcontaminants,highconcentration,andstrongpollutionoftheleachateinmunicipalsanitarylandfillsite,thefunctionofanti-seepagesystemwasanalyzed.Basedonthecomponentanditssolidifyingmechanismofclay-solidifiedgrouts,thepenetrationcapacityandtheadsorptioncharacteristicsofclay-solidifiedgroutingcurtainonleachateorcontaminantswerestudied.Theclay-solidifiedgroutingcurtainwasadoptedinanactuallandfil.lThereliabilityandeconomyoftheverti-calanti-seepagetechnologyusedinmunicipalsanitarylandfillsitewereprovedfromconstructionquality,anti-seepageefficiencyandtechno-economy.  Keywords: landfillsite; leachate; verticalanti-seepage; clay-solidifiedgroutingcurtain  :(2000[65]); (06C093)  ,,。、,,,95第23卷 第6期2007年3月            中国给水排水CHINAWATERWASTEWATER             Vo.l23No.6Mar.2007。。,、,,,。,、,。,[1][2],。1 填埋场防渗要求1.1 、,,,,1[3]。1 Tab.1 Typicallandfillleachatequality-pH3.8~8.5/(mgL-1)2360~35700COD/(mgL-1)40~89500Pb/(mgL-1)0.1~2.0As/(mgL-1)0.1~0.5Cr/(mgL-1)0.01~2.6BOD5/(mgL-1)80~336NH3-N/(mgL-1)20~740NO-2-N/(mgL-1)0.6~19/(mgL-1)50~250Cu/(mgL-1)0.10~1.0Cd/(mgL-1)0.03~1.0Hg/(mgL-1)0~0.031.2 ,[4]:① ,,、;② ,,;③ ,,;④ ,,;⑤ ,;⑥ ,。2 粘土固化注浆帷幕的防渗阻滞特性2.1 、、。,80μm;425;,3.2,40Be。(1∶3)~(1∶2),60%~80%(),1%~2%()。,,,。,。[5]:、、。、,,,。2.2 ,,。[6],:① ,,。② 。,。③ 。。④ 96第23卷 第6期              中国给水排水            。⑤ pH,,。2.3 ,(),,。,(SBET)(CEC),(2)。2 SBETCECTab.2 SBETandCECofclay-solidifiedgroutingcurtainX34X24X14X23X22SBET/(m2g-1)85.428.735.848.738.934.8CEC/(mmolkg-1)39.6526.9520.6366.3503.5453.2  [7],。Pb2+Cd2+,pH5.02∶4。Pb2+Cd2+,Pb2+Cd2+,Pb2+Cd2+,Pb2+Cd2+。,Freundlich,0.93。[6],,,pH=6.080%,∶=2∶1,,,。3 粘土固化注浆帷幕的应用3.1 [6~8],(),2.09km2,1790m3,、、、、。31。3.2 ,18m,,、。、,。,、,,—。,,10-6~10-3cm/s。3.3 ,,80m。,,,,。100m,,。3.00m,,2.50m,23~30m,ω=0.01L/(minmm)。,5~10m。0.4~0.6MPa,,0.4~0.7MPa;,,,。3.4 ,,,。。27,,ω0.01L/(minmm),50~100。,,。20036397陈永贵,等:城市垃圾卫生填埋场垂直防渗技术第23卷 第6期,,,。3。3 Tab.3 MonitoringresultsmgL-1NH3-NCODBOD5CdPb358.038001910.180.790.37713.500.050.020.06595.800.050.020.11397.500.050.023.5 ,,5174.1~7855.4,297.62(1995),,1/20。1.68700,7000,4.49/m3,。,、,(HDPE),。,,、、。,,,、。4 结论① ,,,,。② ,,。③ ,Freundlich。④ ,,,。⑤ ,,,,。:[1] ,,,.[J].,2003,(1):41-43.[2] ,,.[J].,1999,26(5):76-80.[3] ,.[J].,1998,17(2):28-29.[4] .[D].:,2004.[5] .[D].:,1994.[6] .[D].:,2004.[7]CHENYong-gui,ZHANGKe-neng,ZOUYin-sheng,etal.RemovalofPb2+andCd2+byadsorptiononclay-solidi-fiedgroutingcurtainforwastelandfills[J].JournalofCentralSouthUniversityofTechnology,2006,13(2):166-170.[8] .[D].:,1999.:13755129922E-mail:yg-chen@163.com:2006-10-2598第23卷 第6期              中国给水排水            

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