日本 IHI 公司在今年又开发出了世界上直径最大的嵌套母子型泥浆盾构机,其直径为14.18m,将用于日本东京地铁的施工。该机的特点是,用于双轨隧洞开挖的子机安装在用于三轨隧洞开挖的大直径母机体内。其施工程序为:(1)母机自起始竖井起开挖一条三轨隧洞;(2)母机行进至目标竖井;(3)子 Japan IHI this year has developed the world’s largest diameter nested mother-son type mud shield machine, the diameter of 14.18m, will be used for the construction of the Tokyo Metro in Japan. This machine is characterized by that the sub-machine for excavation of double-track tunnels is installed in a large-diameter mother machine for excavation of three-track tunnels. The construction procedure is as follows: (1) The main machine excavates a three-track tunnel from the starting shaft; (2) the main machine travels to the target shaft; (3)