How to reconstruct the lining part of the existing two-lane road tunnel

摘要

PROBLEM TO BE SOLVED: To exhibit excellent durability while exhibiting advantages that the construction cost is low, the construction period is short, the cross section of the tunnel after repair is not reduced, and the passage of vehicles in the tunnel can be secured even during repair. To provide a method of remodeling the lining part of a tunnel that can construct a new inner wall surface. SOLUTION: This is a method of remodeling an lining portion of an existing two-lane road tunnel, and the cutting work comprises a cutting process using a cutting machine 4 provided with a drum cutter 41 having a large number of bits on the peripheral surface. The lining formwork 5 is arranged so that the inner wall surface construction work can move relative to the protector 2 in the work space 3 formed between the inner wall surface of the tunnel 1 and the outer wall surface of the protector 2. It consists of the lining concrete casting process used. [Selection diagram] Fig. 1