Buoyancy Force Acting on Underground Structures considering Seepage of Confined Water

Table 3

Measured and theoretical pore pressures and buoyancy forces acting on the structure placed on homogeneous soil layer.

Test case	Hydraulic gradient	Measured pore pressure from ‘a,’ (kPa)	Theoretical hydrostatic pore pressure, P0 (kPa)	Pore pressure raising ratio, /P0−1	Measured buoyancy force, F (N)	Theoretical hydrostatic buoyancy force, F0 (N)	Buoyancy force raising ratio, F/ F0−1
H1	0	3.105	3.0	0.035	128	120	0.067
H2	0.125	3.509	3.0	0.170	144	120	0.200
H3	0.25	4.101	3.0	0.367	164	120	0.367