+1 vote
in Irrigation Engineering by (68.8k points)
Which among the following type of dam section is expected to be the thinnest and the most economical?

(a) Constant angle arch dam

(b) Shell-arch dam

(c) Constant radius arch dam

(d) Concrete gravity dam

I have been asked this question at a job interview.

Question is taken from Arch Dams topic in chapter Arch and Buttress Dams of Irrigation Engineering

1 Answer

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ago by (92.2k points)
Correct answer is (b) Shell-arch dam

Explanation: Shell arch dams are much more economical than the constant angle arch dams as their sections are quite thin. The Idduki dam in India is only 45 m thick at its base even with 170.7 m height whereas the famous Hoover dam of the USA which is a constant radius arch dam is 201m thick at its base with only 222 m in height.

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