Comprehensive evaluation method for state of turbine blade of heavy duty gas turbine

The invention discloses a comprehensive evaluation method for the state of turbine blades of a heavy-duty gas turbine, which comprises the following steps: acquiring actual working condition parameters of the heavy-duty gas turbine, comparing the actual working condition parameters with design working condition parameters, and judging whether the residual life can be prolonged or not; performing non-destructive detection and destructive detection on the turbine blade to obtain a non-destructive detection result and a destructive detection result of the preset fault detection item, comparing the results with corresponding available standards respectively, and judging whether the turbine blade corresponding to the current fault is available or not; if yes, determining a repair mode according to the detection item with the fault; a turbine blade sample and a base material are selected to be tested under the accelerated test condition, the total running time of the current available turbine blade is calculated in