PDA

View Full Version : On blasting rock for a highway, and scoring grooves into the rock



Plot Device
01-10-2011, 08:29 PM
Why does a finished highway --specifically the part where they cut through a hill-- include vertical score lines all up and down the rising walls of rock that rim both sides of the highway?

I'm told it's drainage and it prevents ice buildup, but I still don't understand it.

waylander
01-10-2011, 08:38 PM
Possibly it is where they drilled the holes for the explosives that blasted out the rock

alleycat
01-10-2011, 08:40 PM
It's left over from the drilling and blasting required for mass rock excavation.

blacbird
01-11-2011, 12:34 AM
Possibly it is where they drilled the holes for the explosives that blasted out the rock

Not "possibly". It's exactly what they do. They do the same thing in open-pit mines to blast apart the rock. Has nada to do with drainage.

waylander
01-11-2011, 01:19 AM
Thought so, but I wasn't sure