What are the advantages and disadvantages of Arch Dam??
An arch dam requires less concrete as compared to a gravity damas the section is thinner.
Arch dams are more suited to narrow, V-shaped valley, havingvery steep slopes.
Uplift pressure is not an important factor in the design of an archdam because the arch dam has less width and the reduction inweight due to uplift does not affect the stability.
An arch dam can be constructed on a relatively less strongfoundation because a small part of load is transferred to base,whereas in a gravity dam full load is transferred to base.
An arch dam requires good rock in the flanks (abutments) to resist the thrust. If the abutments yield, extra stresses develop which may cause failure.
The arch dam requires sophisticated formwork, more skilled labor and richer concrete.
The arch dam cannot be constructed in very cold climates because spalling of concrete occurs due to alternate freezing and thawing.
The speed of construction is relatively slow.