jcsmith13
Civil/Environmental
- Dec 6, 2010
- 1
I am working on a plan to backfill a double collar vertical vent shaft and need to be able to work directly over the shaft to determine where to find competent rock within the shaft and later to construct a foam plug within the shaft.
My concern is with the shaft sloughing around the collar. We are planning to use fall arresting systems on workers but I think some sort of truss crossover is needed for work over the shaft. I wondered if anyone else has used this type of system in the past.
Thank you,
Jason
My concern is with the shaft sloughing around the collar. We are planning to use fall arresting systems on workers but I think some sort of truss crossover is needed for work over the shaft. I wondered if anyone else has used this type of system in the past.
Thank you,
Jason