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ST7-1.20.40.9 Fluid Level in Soil Models
Soil in a natural state contains voids between grains that are filled by air and fluid such as water. The fluid can greatly affect the in-situ stress state of the soil by adding mass and pressure to the soil strata. Trapped fluid in soil can also influence the stress in the soil skeleton under external loads by sharing a portion of the loads with the soil skeleton. Depending on the fluid content, the soil can be approximated with one of two limit situations: saturated or unsaturated.
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