Buoyancy control analysis

CALCULATION FOR SET ON WEIGHT
Pipe size
Outside diameter, OD
Wall thickness, t
Weight of pipe, WP
Density of water, r
Buoyant force (Pipe), BP
Weight of set on weight, WC
Volume of set on weight, VC
Bouyant force (Set on weight), BC
A) FOR GOOD SOIL IN HIGH WATER TABLE
Soil bulk density, BD       1.5 T/m3
Minimum depth of cover
Bulk density
Bulking factor
Submerge bulk density
Submerge and disturbed weight of over burden soil, WS
Buoyancy Control Formula:
where L is the center to center weight spacing.
Center to center weight spacing, L
B) FOR PARTIALLY GOOD SOIL IN HIGH WATER TABLE
Soil bulk density
At depth less than 2.0 m
Vane test result < 0.00025 N/mm²
Minimum depth of cover
Bulk density
Bulking factor
Submerge bulk density
Submerge and disturbed weight of over burden soil, WS
Center to center weight spacing, L
C) FOR POOR SOIL IN HIGH WATER TABLE
Soil bulk density BD < 1.35 T/m3 at all depth, remolded vane test result < 0.00025 N/mm²
Minimum depth of cover
Bulk density
Bulking factor
Submerge bulk density
Submerge and disturbed weight of over burden soil, WS
Center to center weight spacing, L