(a)
(b)
(c)
(d)
(e)
(f)
Figure 4: Stress and permeability versus axial strain of shaft lining concrete under hydromechanical coupling: (a) test number 1, (b) test number 2, (c) test number 3, (d) test number 4, (e) test number 5, and (f) test number 6.