2001 年 11 巻 p. 227-232
Although Central Ventilation facility tunnel is a duct tunnel for the main one, it has large cross section as much as 2-lane road tunnel. It goes through alluvium layer with small overburden. Since the ground surface is densely covered residential area, construction methods to sustain the influence of tunneling have been carefully selected.
In this paper, the authors introduce the construction methods adapted and comment its effect based on the measurement result.