Virtual Tours : CFM Packer
In the CFM Project a major aim was sealing the shear zone at the tunnel surface with a megapacker to create a no (or low) flow boundary and to reduce the gradient in the groundwater heads from the rock towards the tunnel. The view below is shown standing within the CFM megapacker.
View from within the CFM megapacker - view the Colloid Formation and Migration (CFM) Section for more info