Repairing of Deformed Cutterhead of Shield Machine

In the course of shield boring,serious deformation occurs to the cutterhead and the boring has to be suspended.Due to the restraints of the environment,instead of full and systematic repairing of the cutterhead,emergency repairing has to be made.The technology of the emergency repairing of the cutterhead is presented in the paper,which can provide reference for similar cases in the future.