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首页> 外文会议>North American tunneling 2012 proceedings >Marine Site Investigation for Long Sea Outfall Tunnel in Dublin Bay, Ireland—Radical Revision of Anticipated Geology and Resulting Complexities for Tunnel Design
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Marine Site Investigation for Long Sea Outfall Tunnel in Dublin Bay, Ireland—Radical Revision of Anticipated Geology and Resulting Complexities for Tunnel Design

机译：爱尔兰都柏林湾长海​​排污隧道的海洋工地调查—预期地质的根本性修订以及隧道设计的复杂性

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Dublin City Council (DCC) intends to upgrade the Ringsend wastewater treatment works fromrnits present capacity of 1.64 million population equivalent (PE) to 2.1 million PE to meet the future demandrnprojections for the catchment area and ensure compliance with relevant legislation.rnThe proposed treated final effluent discharge option is to divert the existing inshore effluent dischargernpoint into a purpose built long sea outfall tunnel (LSOT) extension, approximately 5-metre in-internal-diameterrnand 9-kilometre under Dublin Bay eastwards from the City of Dublin.rnNo geological records existed for the Dublin Bay geology at the project outset. Therefore a marine subsurfacerninvestigation, incorporating 21 onshore and offshore boreholes and an inter-tidal geophysics exercisern(Marine SI), was completed to determine the geology under Dublin Bay and identify the optimum LSOTrntunnel route.rnThe results of the Marine SI radically altered the historically inferred understanding of the bay’s geologyrnand have presented a range of complex conditions for tunnel alignment design. This paper will present thernmethodology and interpretation of results of the Marine SI in Dublin Bay and resulting complexities for thernLSOT design.
机译：都柏林市议会（DCC）计划将Ringsend废水处理厂的现有容量从164万人口当量（PE）升级到210万PE，以满足未来对集水区的需求预测并确保符合相关法规。提议的经过处理的最终废水排放选择是将现有近岸污水排放点转移到专用建造的长海排污隧道（LSOT）延伸段，从都柏林市向东向都柏林湾下约5米内径和9公里，这没有地质记录。项目开始时的都柏林湾地质。因此，完成了一个海洋地下研究，该研究包括21个陆上和海上钻孔以及潮间地球物理演习（Marine SI），以确定都柏林湾下的地质情况，并确定了最佳的LSOTrntunnel路线。rn海洋SI的结果从根本上改变了历史推断对海湾地质学的了解为隧道走线设计提出了一系列复杂条件。本文将介绍都柏林湾海洋SI的方法论和结果解释，以及LSOT设计的复杂性。

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