富水区隧道渗流场解析解及合理支护参数
赵建平,李建武,毕林,程贝贝

Analytical solution of seepage field and reasonable support parameters of tunnel in water rich area
Jian-ping ZHAO,Jian-wu LI,Lin Bi,Bei-bei CHENG
图 3 焦点为z1z2的双极坐标系
Fig.3 Bipolar coordinate system with focusz1 and z2