ABSTRACT
The tunnel model was designed with the prototype of Shanghai metro tunnel. The prototype tunnel is 6.2 meter and 5.5 meter in external and internal diameter respectively. The thickness of the segment is 0.35 meter. The width of the segment is 1 meter. The tunnel ring was installed by 6 segments namely 1 piece of key segment, 2 pieces of B type segment and 3 pieces of A type segment. The assembly of the tunnel segments was shown in Figure 2. The segments were connected by steel bolts.
