Fixing structure for turbine rotor blade

A fixing structure for a turbine rotor blade for fixing a blade implantation portion of the turbine rotor blade in axial insertion-type implantation form in a blade groove formed in a rotor wheel of a turbine rotor, the fixing structure comprising:

• a fixing groove penetrating the blade implantation portion and the rotor wheel in a circumferential direction of the turbine rotor;
• a locking blade, of the turbine rotor blade, lastly fitted into the blade groove;
• and
• a fixing member inserted from an axial direction of the turbine rotor into the fixing groove formed in the blade implantation portion of the locking blade and the rotor wheel forming the blade groove into which the blade implantation portion of the locking blade is fitted,
• the fixing member comprising:
• an inner peripheral fixing member disposed on a radially inner side of the fixing groove;
• an outer peripheral fixing member disposed on a radially outer side of the fixing groove;
• a center fixing member fitted between the inner peripheral fixing member and the outer peripheral fixing member, and
• a bent portion provided at an end portion on a downstream side in the axial direction in the inner peripheral fixing member or the outer peripheral fixing member, the bent portion being bent to the center fixing member side to fix the blade implantation portion of the locking blade in the blade groove.