Varying Base Pressure and Groundwater Level Effect on Settlement of Clayey Soil Under Circular Loading
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Keywords:
Base Pressure, Clayey Soil, Groundwater Level, Settle 3D, SettlementAbstract
Settlement of clayey soil depends on various factors. Groundwater level and base pressures are
main responsible ones. In this study, base pressure and groundwater level impact on soil settlement were
investigated 11 different ground water level (0-10 m below the ground surface) and 18 different base
pressures (0-900 kPa) were used for this purpose. 198 cases were analysed with Settle 3D software. Soil
layers used were 10 m sand layer, following 10 m of clayey layer and 10 m sand layer again which was
totally 30 m. Bousinessq method was selected for stress computations. Settlements were calculated for 10
to 18250 days (50 years). Graph between base pressure and settlement were drawn for maximum settlement
of all cases. Base pressure values made settlement values exceeded 7.5 and 12.5 cm were also evaluated.
Results showed that there can be created a relationship of 2nd degree polynomial between base pressure and
settlement. Settlements for all cases were below 7.5 cm when the base pressures were 100 kPa and lower.
Settlement of Case 1 (groundwater level at the beginning of clay layer) were approximately 1.35 times of
Case 11 (groundwater level at the end of clay layer). Change in groundwater level and level of base pressure
must be taken into account while computing settlements of engineering structures.
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