ABSTRACT

During the tunneling with shield method, the automaticity of the shield is becoming higher, the driving velocity is faster, and these two factors make a lot of pressure on measurement and induction. For giving the deviation of directivity duly and precisely and rectifying the deviation during the construction of tunneling, there are only several precise guidance systems which are used in the tunneling with shield method in the international. So far, the precise guidance systems are used a little in the engineering, the reasons are: 1 the equipment charge or the tenancy charge is high; 2 the users are required a lot and it is not easy for the technologists to master; 3 the operation and the maintenance of some systems is complicated, and it needs some other assistant methods to make sure the precision reliability.