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蜊门港海峡特大桥是浙江省象山县石南高陆岛交通工程的组成部分。该桥全长为２１９ｍ，宽为９．８ｍ，主孔跨度为１５０ｍ，为预应力混凝土组合悬臂桁架拱结构。该桥横跨两岛之间，与国内同类型的桥梁相比，在结构设计、材料工艺、施工方法等方面有较大的改进和突破，故使这种新型结构体系在实践中又增添不少可以借鉴的经验，值得推广和应用。本文结合跨海桥的特点，从设置定位装置、空中翻身与悬拼操作、预应力筋张拉、体系转换等方面作了详细介绍，并提出了可供借鉴的安装经验和建议。
Clammen Port Strait Bridge is an integral part of the traffic project of Helan Island, Helan, Zhejiang Province. The bridge length of 219m, width of 9.8m, the main span of 150m, for the prestressed concrete cantilever truss arch structure. The bridge across the two islands, compared with the same type of bridge in the country, in the structural design, material technology, construction methods and other aspects of greater improvement and breakthroughs, so that the new structure of the system and in practice added Less can learn from experience, it is worth promoting and application. In this paper, the characteristics of trans-sea bridge are introduced in detail from the following aspects: setting positioning device, turning over and hanging upside down, prestressing tendon tensioning and system conversion, and put forward some installation experience and suggestions for reference.