For the proposed fill shown in Figure 11.29, assume the ultimate consolidation settlement is 1.6 ft. The owner wants to build a structure on top of the fill. The structure can withstand a total settlement of 4 in. How long must the owner wait after placement of the fill before building the structure on top of the fill? Use the simplified method.

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Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.