水下隧道合理覆盖层厚度数值模拟研究

Research on Reasonable Cover Thickness for Underwater Tunnel through Numerical Analysis

合理的确定水下隧道覆盖层厚度是建设水下隧道关键技术之一。一方面,覆盖层厚度是水下隧道建设的一个重要经济指标。在水下隧道线路方案确定以后,覆盖层厚度的大小直接决定着水下隧道的长度,从而影响水下隧道的建设费用。另一方面,覆盖层厚度还是控制水下隧道施工和运营安全的一个重要因素。文章通过有限元流固耦合分析,提出了长沙市湘江大道浏阳河隧道合理覆盖层厚度,直接指导了该隧道设计,同时对其它水下隧道设计具有借鉴作用。

In underwater tunnel construction,to confirm the reasonable cover thickness is the key in the technology.The cover thickness is not only an important economic index,but has impact on the underwater tunnel′s length and cost;it also plays a decisive role in its security during construction and service.Through FEM numerical analysis,the reasonable cover thickness of Liuyang-River underwater tunnel is put forward and it can provide references for the design of other underwater tunnel.