Highway Engineering - Engineering

Q1:

To prevent movement of moisture from subgrade to road pavement on embankments about 0.6 m to 1 m higher than water table, the thickness of cut off layer of coarse sand used, is

A 15 cm

B 20 cm

C 30 cm

D 45 cm

E none of these.

ANS:E - none of these.

In general, sense, if the embankment is already above the water table then there is no need to prevent the sub-grade from moisture, hence it is zero.

@Akshay.

If both are at the same level or if the water table equals or above the embankment then only measures were taken.