概要能够在非常困难的软土地质条件下用机械开挖隧道,应感谢隧道开挖机械技术的发展。用机械开挖隧道的两个最重要的目的是:(1)开挖隧道时可靠地支护土层;(2)衬砌时通过注浆维持盾构尾部土体平衡。关于怎样达到这两个目的,作者比较了已经开发出的两种机械开挖隧道方法——泥 Summary It is possible to excavate tunnels by mechanical means under very difficult soft soil geological conditions. Thanks to the development of tunnel excavation machinery technology. Two of the most important purposes of mechanically excavating a tunnel are: (1) reliable support of the soil during excavation of the tunnel; and (2) maintenance of the soil balance at the tail of the shield by grouting during lining. On how to achieve both of these objectives, the authors compared two methods of mechanically excavating tunnels that have been developed-mud