Heave Check according to Chinese Standard
This verification depends on the depth of confined aquifer D and height of its confined water level hw to which the water would rise if it was not restricted by aquifuge from above.
Verification is done by using a safety factor approach and follows formulas:
where: | SFh | - | safety factor of stability of the soil against heave |
D | - | Distance between the top of the confined aquifer and the bottom of foundation pit | |
γ | - | Unit weight of the soil layer between the top of confined aquifer and the bottom of foundation pit | |
hw | - | Pressure head from the top of confined aquifer | |
γw | - | Unit weight of water |