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Settlement of spread footing foundation under loads

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Asked: April 28, 20192019-04-28T19:21:26-07:00 2019-04-28T19:21:26-07:00In: Foundation
AKM59
AKM59

AKM59

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If we have two spread footing foundation (Isolated Pads) of square sizes

(1m x 1m) and (2m x 2m),with axial loads ; (10t) and (40t) respectively, by assuming the soil features and specification for the two pads ,is the same ,

So which of them will settled more or the settlement will be equal for both? and why?

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  1. AdityaBhandakkar

    AdityaBhandakkar

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    AdityaBhandakkar User
    2020-08-12T23:31:15-07:00Added an answer on August 12, 2020 at 11:31 pm

    Absolutely not. Settlement for these two footings are different.

    First Footing – 1m X 1m

    Second Footing – 2m X 2m

    i.e dimension of second footing is twice the first footing.

    Applied load: First Footing- 10t

    Second Footing- 40t

    i.e applied load on second  footing  is four times the first footing.

    So from the observation, settlement in the second footing is greater than the first footing.

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  2. AdityaBhandakkar

    AdityaBhandakkar

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    AdityaBhandakkar User
    2020-08-12T23:31:12-07:00Added an answer on August 12, 2020 at 11:31 pm

    Absolutely not. Settlement for these two footings is different.

    First Footing – 1m X 1m

    Second Footing – 2m X 2m

    i.e dimension of second footing is twice the first footing.

    Applied load: First Footing- 10t

    Second Footing- 40t

    i.e applied load on second footing is four times the first footing.

    So from the observation, settlement in the second footing is greater than the first footing. Because settlement is directly proportional to the applied load.

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  3. aviratdhodare

    aviratdhodare

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    aviratdhodare
    2020-08-13T13:11:16-07:00Added an answer on August 13, 2020 at 1:11 pm

    Since the dimentions and magnitude of the 2nd is more than the first one, the settlement would not be same roughly.

    Bcoz the dimension are twice the 1st one, Magnitude is 4 times the 1st one.

    So bcoz of this, obviously the 2nd footing will be settled more.

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  4. Madeh Izat Hamakareem

    Madeh Izat Hamakareem

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    Madeh Izat Hamakareem
    2019-07-31T21:26:43-07:00Added an answer on July 31, 2019 at 9:26 pm

    Equations of Applicable codes can be used to calculate the deflection of these two pad foundation since they are the same except their dimension and load magnitude.

    It can be estimated roughly that, the settlement of the second one would be twice the first one; the dimension of the second one is doubled whereas its imposed load is quadrupled.

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