Q:
The buttresses of a free deck buttress dam are provided at ‘x’ m clear spacing and buttress thickness is proposed to be ‘t’ m. The buttress section can then be designed like the section of a concrete gravity dam by considering the effective unit weight of water = Surcharge factor (S) x actual unit weight of water. The value of this surcharge factor is given as _____________
Answer & Explanation
Answer: B) S = (x + t)/t
Explanation: Surcharge factor (S) is the ratio of the dam length (x + t) to the buttress thickness (t).
S = (x + t)/t
The resultant impact can be considered by increasing the unit weight of water by multiplying the actual value by a surcharge factor.
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