Design Method of Countermeasures for Deformed Tunnel


Yoshiyuki KOJIMA,@Toshihiro ASAKURA,
Yutaka SATO,@Kazuhide YASHIRO

@A new design method of countermeasures for deformed tunnel is developed based on tunnel lining model tests, numerical analyses and field measurements. The countermeasures used in this method are back-fill grouting, rock bolting, inner reinforcing and inner lining. In this paper the following two procedures are introduced; 1) the design procedure using the standard design pattern according to reinforcing rank, tunnel structure and cause of deformation, 2) the design procedure using lining crack propagation analysis by a frame model.