Research on Section Form of Submerged Floating Tunnels Considering Structural Internal Force Optimization under Fluid Action

Submerged floating tunnel, as a new type traffic structure crossing different waters, has short research history. However, because of its novelty and superiority, it has been a hot research topic. This paper takes the tunnel structure form as the breakthrough point, firstly, gives space arrangement and dimension requirement of submerged floating tunnel from the design view, then, analyzes hydraulic property of two section forms combining with fluid calculation and compares influence of different section forms on structure stress by combining the structure calculation. The research concludes that the elliptical section has better fluid and structure property than the rectangular section.