Due to the remolding of soil, a smear zone is formed around the sand drain during its construction. Select the correct statement about the smear zone
1
The clay in the smear zone has zero excess pore pressure on the outer boundary.
2
The radial distance from the center line of drain well to the farthest point on the smear zone is equal to the radius of smear zone.
3
An increase in coefficient of permeability in the radial direction occurs due to remoulding.
4
The clay in the smear zone has time dependent excess pore pressure on the inner boundary.
5
Question Not Attempted