甬舟铁路海底隧道穿越金塘水道埋深尺度论证

Argument of buried depth of the submarine tunnel of YongzhoURailway passing through Jintang waterway

宁波至舟山铁路(简称“甬舟铁路”)是舟山融入国家快速铁路网的重要纽带,其穿越金塘水道的隧道线位面临超大自然水深、局部极限冲刷、大型船舶通航及锚泊落锚和拖锚带来的埋设环境风险。综合梳理金塘水道现状通航条件和锚地锚泊条件,开展了历史海岸演变、极限冲淤分析、落锚及拖锚的锚击深度等专题研究,提出了甬舟铁路隧道穿越金塘水道的局部最小埋设深度和沿程埋设尺度要求,为我国最长海底铁路隧道的建设可行性提供了重要的技术支撑。

The YongzhoURailway from Ningbo to Zhoushan is an important link for Zhoushan to integrate into the national high-speed railway networks.The tunnel line through the Jintang waterway faces the buried environmental risks caused by the excessive natural water depth,local limit scour,anchor dropping,or dragging of large ships during navigation and mooring.The paper has comprehensively combed the current navigation conditions and anchorage conditions of the Jintang waterway,and carried out special studies on historical coast evolution,limit erosion and deposition analysis,anchor drop and towed anchor strike depth,etc.The study has proposed the local minimum buried depth and the along with requirement the buried dimension of the YongzhoURailway tunnel passing through the Jintang waterway,which has provided important technical support for the longest undersea rail tunnel construction in our country.