Table 1: Model tests program.

SeriesConstant parametersVariable parameters

1 without confinement (control values) , 30 and 60 kPa
2 and  kPa , 1.25, 1.5 and 1.75
3 and  kPa , 1.25, 1.5 and 1.75
4 and  kPa , 1.25, 1.5 and 1.75
5 and  kPa , 1.25, 1.5 and 1.75
6 and  kPa , 1.25, 1.5 and 1.75
7 and  kPa , 1.25, 1.5 and 1.75
2 and  kPa , 1.25, 1.5 and 1.75
3 and  kPa , 1.25, 1.5 and 1.75
4 and  kPa , 1.25, 1.5 and 1.75
5 and  kPa , 1.25, 1.5 and 1.75
6 and  kPa , 1.25, 1.5 and 1.75
7 and  kPa , 1.25, 1.5 and 1.75

See Figure 2 for definition of the variable.
B is constant = 100 mm, and σ is the net bearing stress in kPa.