Influence of Intermediate Principal Stress on Undrained Behavior of Intact Clay under Pure Principal Stress Rotation

Table 2

Test program of pure principal stress rotation.

Test no.	𝑞/kPa	𝑏	𝛼/°
Series 1
RS3700	37.5	0	0~360
RS3725	37.5	0.25	0~360
RS3705	37.5	0.5	0~360
RS3775	37.5	0.75	0~360
RS3710	37.5	1	0~360
Series 2
RS2510	25	1	0~360
RS3710	37.5	1	0~360
RS5010	50	1	0~360
RS5010-2	50	1	90~270
Series 3
RS2505	25	0.5	0~360
RS3705	37.5	0.5	0~360