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1985年11月建成通车的天津塘沽海门大桥(见照片),是我国当前最大的直升式城市公路开启桥。其规模与美国绿岛大桥相接近。该桥经通车试验和严寒低温的考验,机电系统运转正常。过航时陆上中断交通时间视过航船只数量而定。一般在8～22分钟,随着操作熟练,中断时间还会缩短。此桥主要特点:造价低(总造价2500万元,技术经济指标2525元/平方米),工期短(三
Opened in November 1985 in Tianjin Tanggu Haimen Bridge (see photo), is China’s largest helicopter open city road bridge. Its size and the United States near the Green Island Bridge. The bridge after the opening test and the test of cold and low temperature, mechanical and electrical systems operating normally. Off-time land interruption traffic hours depending on the number of vessels may be. Generally in 8 to 22 minutes, with the operation proficient, the interruption time will be shortened. The main features of this bridge: low cost (total cost 25 million yuan, technical and economic indicators 2525 yuan / square meter), short duration (three