国内重力式港口建筑物,如码头、防波堤工程,均系藉结构的自重维持稳定。施工工艺上,习惯采用水上作业,即进行基床整平后,使用起重船吊运、安装。此种基于自重稳定的建筑物,断面必然巨大;水上作业受风、浪影响大,且需大型工程船舶。 国外于六十年代初,在开敞海域中,兴 Domestic gravity port structures, such as piers and breakwater projects, are maintained by their own weight. Construction technology, the habit of using water operations, that is, after the foundation bed leveling, lifting crane lifting, installation. This kind of building based on self-respect and stability must have a huge cross-section. Waterworks are greatly affected by wind and waves and require large-scale engineering ships. Foreign in the early 1960s, in the open sea, Xing