35EngineeringConstruction2023年6月建第55卷设程第6期大口径供水管道定向钻穿越河道施工技术时振兴,丁永海(1.佛山水务环保股份有限公司,广东佛山528000;2.海洋石油工程股份有限公司,广东深圳518054)摘要:基于过北江DN1200供水管道定向钻穿越工程,本文较为系统地介绍了大口径管道定向钻穿越河道的关键技术。首先对穿越施工每道主要工序的关键技术进行介绍,其次提出本项目的施工难点及对应措施,最后说明了在项目最为关键的回拖阶段突遇拖头断裂以及最终管线成功拖出采取的措施。本文内容可为类似工程提供参考。关键词:大口径管道;定向钻;关键技术;施工难点;拖出措施中图分类号:TU990.3文献标识码:A文章编号:1673-8993(2023)06-0035-09doi:10.13402/j.gcjs.2023.06.074ConstructiontechnologyoflargecaliberwatersupplyingpipelineacrossingtheriverwaybydirectionaldrillingSHIZhenxing',DINGYonghai?2(1.FoshanWaterEnvironmentalProtectionCo.,Ltd.,Foshan528000,Guangdong,China;2.OffshoreOilEngineeringCo.,Ltd.,Shenzhen518054,Guangdong,China)Abstract:BasedonDN1200watersupplypipelinecrossingbeijiangriverprojectwithdirectionaldrilling,thekeytechnologiesoflargecaliberpipelineacrossingtheriverwaywithdirectionaldrillingareintroducedelaboratelyandsystematically.Firstly,thekeytechnologyofthecrossingconstruction'severymajorprocessisintroduced.Secondly,itputforwardconstructiondifficultiesandcorrespondingmeasuresofthisproject.Finally,itillustratestheincidentthatthedrawingheadabruptfailuredatthemostcriticaldragbackstageoftheprojectandmeasuresthatthepipelinewasdraggedoutatlastisillustrated.Thisprojectisrepresentativeanditcanprovidereferenceforsimilarprojects.Keywords:largecaliberpipeline;directionaldrilling;keytechnology;constructiondifficulties;measuresofdraggingout管线定向钻穿越施工不影响被穿越区域地面或河道的交通、航线,对建构筑物、管线和周边环境影响小,同时又具备施工速度快、造价低、灵活性高等优势,在周边环境复杂的特定条件下相比于传统的沿线开挖施工的方式具有极其显著的优势。定向钻穿越技术对于地层的适应性较强,除了卵砾石层、砾石质量分数超过50%砂砾石层、含有大量孤石、漂石或障碍物的地层以及单轴抗压强度大于60MPa的硬质岩层,广泛适...