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在江河上架设桥梁,与在江河底修建隧道,孰优孰劣,一直是人们关注的问题。国内外的实践证明,江底隧道具有不妨碍通航,不受天气影响,可全天候通行,维修保养费用低廉,使用寿命长,战争等特殊情况下不易被破坏等优点,逐渐受到重视。 我国第一座江底隧道诞生在上海。1966年采用盾构法修建了长2176米的第一座黄浦江江底隧道,1984年采用新研制的大型网格式盾构法在黄浦江水底建成了长2261米第二座江底隧道。 “八五”期间,我国水底隧道的修建向大型化、自行设计、自行建造方向发展。1993年秋国内第一条六车道
Erection of bridges on the rivers and the construction of tunnels at the end of the river has always been a problem that people are concerned about. The practice at home and abroad proves that the tunnel at the end of the river has been gradually valued due to its advantages of not hindering the navigation, being free from the weather, being accessible all the year round, having low maintenance costs, long service life and being easy to be destroyed under special circumstances such as war. The first river bottom tunnel in China was born in Shanghai. In 1966, the first Huangpu River tunnel with a length of 2176 meters was constructed by shield method. In 1984, the second tunnel with a length of 2261 meters was built at the bottom of the Huangpu River by a newly developed large-scale shield tunneling method. During the “Eighth Five-Year Plan” period, the construction of underwater tunnels in our country will be large-scale, self-designed and self-built. The first domestic six-lane in autumn 1993