WATER CUT-OFF SYSTEM OF MECHANICAL SHIELD DOCKING METHOD

These days, there are increasing needs for the underground docking technologies of the shield tunnels because of the difficulty in securing the land for the shafts. The technical problems for the underground docking are how to dock without affecting natural ground around the shield machines and how to obtain the high water cut-off performance at the joint section. Conventional underground docking has been commonly performed with the methods in hardening ground. This paper discusses about the new method called Mechanical Shield Docking (MSD) method in which two shield machines facing each other directly and mechanically dock without any auxiliary work methods.