A method of assembling a turbine including a casing divided into a casing lower part and a casing upper part, a turbine rotor contained in the casing, and a stationary component supported inside the casing and divided into a lower side and an upper side, the casing lower part and the casing upper part being connected together by bolt fastening, the method comprising:
- a positional information measurement process in which positional information on a plurality of specific portions set on an outer surface of the casing is measured in a state before releasing of bolt fastening of the casing at a time of disassembly of the turbine and in a predetermined disassembly state after the releasing of the bolt fastening;
- an alignment process in which positional adjustment of the stationary component with respect to the casing is made based on measurement results in the positional information measurement process;
- and
- a casing assembly process in which the casing lower part and the casing upper part are fastened together by bolts,
- wherein
- the casing includes:
- an outer casing divided into an outer casing lower part and an outer casing upper part, the outer casing lower part and the outer casing upper part being connected together by bolt fastening;
- and
- an inner casing divided into an inner casing lower part and an inner casing upper part, the inner casing lower part and the inner casing upper part being connected together by bolt fastening, the inner casing supporting the stationary component therewithin, the inner casing being contained and supported within the outer casing,
- the positional information measurement process includes:
- a first measurement process in which positional information on a plurality of specific portions set on an outer surface of the outer casing is measured in a state before releasing of the bolt fastening of the outer casing and in a predetermined disassembly state after the releasing of the bolt fastening;
- and
- a second measurement process in which positional information on a plurality of specific portions set on an outer surface of the inner casing upper part is measured in a state before releasing of the bolt fastening of the inner casing and in a disassembly state after the releasing of the bolt fastening of the inner casing and before removal of the inner casing upper part,
- the alignment process is a process in which positional adjustment of the stationary component with respect to the inner casing is made based on measurement results in the first measurement process and in the second measurement process, and
- the casing assembly process includes:
- an inner casing assembly process in which the inner casing lower part and the inner casing upper part are fasten together by bolts;
- and
- an outer casing assembly process in which the outer casing lower part and the outer casing upper part are fasten together by bolts.