2023·10·BuildingConstruction2088老城区复杂环境条件下大口径排水顶管施工技术高阔上海建工五建集团有限公司上海200063摘要：结合我国北方某老城区排水防涝管线建设工程，介绍了城市更新背景下老城区复杂环境下大口径排水顶管施工关键技术。针对复杂施工环境，通过建立力学模型分析计算安全距离，优化交通组织方案；施工中采用触变泥浆和智能化纠偏等技术，减少了顶管施工对周边环境和地层的影响，提高了施工精度。施工前、中、后对地面和建筑物进行监测，监测结果符合设计要求，验证了采取的关键技术的可靠性。关键词：复杂环境；大口径；排水顶管；关键技术中图分类号：TU992文献标志码：A文章编号：1004-1001(2023)10-2088-04DOI：10.14144/j.cnki.jzsg.2023.10.042ConstructionTechnologyofLarge-diameterDrainagePipeJackingUnderComplexEnvironmentalConditionsinOldUrbanAreasGAOKuoShanghaiConstructionNo.5(Group)Co.,Ltd.,Shanghai200063,ChinaAbstract:BasedontheconstructionprojectofadrainageandwaterloggingpreventionpipelineinanoldurbanareainnorthernChina,thekeytechnologyoflarge-diameterdrainagepipejackingconstructioninthecomplexenvironmentoftheoldurbanareaunderthebackgroundofurbanrenewalisintroduced.Forcomplexconstructionenvironments,themechanicalanalysismodelsareestablishedtocalculatesafetydistancesandoptimizetrafficorganizationplans;theuseofthixotropicslurryandintelligentdeviationcorrectiontechniquesduringconstructioncanreducetheimpactofpipejackingconstructiononthesurroundingenvironmentandstrata,andimproveconstructionaccuracy.Thegroundandbuildingsaremonitoredbefore,during,andafterconstruction,andthemonitoringresultsareanalyzedtomeetthedesignrequirementwhichverifiesthereliabilityofthekeytechnologiesadopted.Thesummarizedexperiencecanbeusedasareferenceforsimilarprojectsinthefuture.Keywords:complexenvironment;largediameter;drainagepipejacking;keytechnology38个单体工程，即36个管渠工程和2个泵站工程。新建排水管北起精勤泵站出口，南至浑河，采用顶管施工工艺，管材为DN2800Ⅲ级钢筋混凝土，全长904.84m，其中5号始发井和4号接收井穿越二环快速路，区段长度94m，设计地面标高为40.89～48.99m，管内底埋深为4.40～10.44m。目前，管道壅水严重，排...
