Question

A non-vertical arch dam is known as a _______________

(a) buttress dam

(b) double curvature arch dam

(c) shell arch dam

(d) both double curvature and shell arch dams

I had been asked this question during a job interview.

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

Answer 1

The correct option is (d) both double curvature and shell arch dams

Best explanation: The economy in dam thickness is further increased by making the dam body not only curved in the plan but also in section. This non-vertical dam is known as the double curvature arch dam or shell-arch dam. These dams are designed as shell structures which are quite complex.