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Bearing stress control in dams: limiting base stress against permissible soil stress For a masonry/gravity dam, to prevent crushing of masonry at the base, compare the maximum base stress with the soil’s permissible compressive stress. Choose the correct relation.

Difficulty: Easy

Correct Answer: Less than or equal to the permissible stress

Explanation:

ConceptFoundation safety requires that the maximum compressive stress at the dam base must not exceed the allowable bearing capacity (permissible compressive stress) of the supporting soil/rock and masonry.

Design checkσmax, base ≤ σperm.

Final AnswerLess than or equal to the permissible stress.

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