The invention belongs to the field of blind
pipe reaming, and particularly relates to a tunnel blind
pipe reaming
machine and a construction method thereof.The tunnel blind
pipe reaming
machine comprises a
machine box, universal wheels are fixedly connected to the bottom of the machine box, two push handles are fixedly connected to the outer side of the machine box, a control device is fixedly connected to the top of the machine box, and a lifting
assembly is arranged in the machine box; a drilling
assembly is arranged on the outer side of the lifting
assembly. Through movement of a transmission ring, a second connecting block is driven to move, so that a transmission block is driven to move, the orientation of the end of the transmission block is changed, then an expansion block is jacked, the expansion block and a first connecting block can rotate along the interior of a
drill bit, and the expansion block moves to the outer side of a connecting cylinder; the outer side of the expansion block is moved to the needed size, then the blind pipe can be expanded conveniently in the follow-up process, the number of
drill bits needing to be carried is reduced, manpower and
material resources needing to be consumed are reduced, meanwhile, the time needed for replacing the
drill bits is shortened, and the working efficiency is improved.