综合技术袁泽浩等：高水位软弱地质条件下长输管道顶管发送沟形式探究油气田地面工程https://yqtd.cbpt.cnki.net高水位软弱地质条件下长输管道顶管发送沟形式探究袁泽浩1魏聪2王俊2杜哲浩1胡兴乔31北京兴油工程项目管理有限公司2中国石油天然气管道工程有限公司3北京市燃气集团有限责任公司摘要：在长输管道施工过程中不可避免需要进行顶管穿越。穿越深度较大时，顶管工作井和管道发送沟的制作受地质条件影响较大，如施工区域地下水位高、土质软弱，采用常规开挖加钢板桩（横撑）支护的发送沟模式存在土体侧压力过大导致支护体系变形垮塌的风险。通过某项目铁路顶管穿越工程的设计及施工情况，对比分析多种管道发送方式，提出了一种灌注桩加高压旋喷桩止水帷幕支护，内部冠梁、腰梁加内支撑的基坑结构体系作为管道发送及接收井，并成功完成了管道发送，同时可为类似高水位、软弱地质条件中顶管管道发送方式的选择、设计及施工提供参考。关键词：长输天然气管道；顶管穿越；软弱地质；深基坑；管道发送ResearchontheSendingDitchFormofLong-distancePipelineJackinginHighWaterLevelandWeakGeologicalConditionsYUANZehao1，WEICong2，WANGJun2，DUZhehao1，HUXingqiao31BeijingXingyouEngineeringProjectManagementCo.，Ltd.2ChinaPetroleumPipelineEngineeringCorporation3BeijingGasGroupCo.，Ltd.Abstract：Duringtheconstructionoflong-distancepipelines，itisinevitabletocarryoutpipejackingandcrossing.Whenthecrossingdepthislarge，thefabricationofpipelinejackingworkingwellsandpipelinesendingditchesisgreatlyaffectedbygeologicalconditions.Whentheundergroundwaterlevelintheconstructionareaishighandthesoilisweak，theexcavationofthesendingditchwithsteelsheetpiles(crossbracing)supportsmayleadtotheriskofdeformationandcollapseofthesupportsystemduetoexcessivesoillateralpressure.Basedonthedesignandconstructionofacertainrailwaypipelinejack-ingcrossingproject，andbycomparingandanalyzingvariouspipelinesendingmethods，thispaperpro-posesafoundationpitstructuresystemofcast-in-placepileplushigh-pressurejetgroutingpilewaterstopcurtainsupport，internalcrownbeamandwaistbeamplusinternalsupport，asthepipelinesendingandreceivingwell，andthepipelinesendingissuccessfullycompleted.Thispaperpro...
