The well curb is designed for which of the following purpose?

For alluvial soil, the normal scour depth can be calculated by _______ formula.

The most economical shape, of a well for the construction of large pier is _____

The essential feature of a pneumatic caissons are ______

To avoid the setting of the cutting edge unevenly, _______ can be introduced.

The analysis of well foundation is done based on the assumptions of _____

Coefficient of horizontal soil reaction m, depends on _____

In order to prevent leakage of air in the working chamber ____ is provided.