A bearing wall carries a total unfactored load of 200 kN/m. It is to be supported on a 400 mm deep continuous footing. The underlying soils are medium sands with c’=0 and phi' =37, and (gamma)t=19.0 kN/m3. For the dry case, (gamma)dry=17.0 kN/m3. The groundwater table is at a significant depth. Using ASD, design the footing with the factor of safety of 2.5 against a bearing capacity failure.
A bearing wall carries a total unfactored load of 200 kN/m. It is to be supported on
a 400 mm deep continuous footing. The underlying soils are medium sands with c’=0 and
phi' =37, and (gamma)t=19.0 kN/m3. For the dry case, (gamma)dry=17.0 kN/m3. The groundwater table is at
a significant depth. Using ASD, design the footing with the factor of safety of 2.5 against
a bearing capacity failure.
2. After the footing in Problem 1 was built, the groundwater table rose to the ground
surface. 1) Evaluate whether the footing design is still acceptable using the ASD method
and the minimum safety factor of 2.5 against a bearing capacity failure. 2) If the footing
fails, improve the footing design and propose a new foundation width.
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