Slurry Rock Socket Overrun DSC
(on behalf of contractor)
The contractor was required to socket 2 ft into rock along
the perimeter slurry wall. In the early stages it was apparent that the
rock socketing would be overrun.
When the socketing was completed, we prepared a graphic
representation of the slurry walls and respective rock sockets to illustrate
anticipated and encountered conditions here below...
The data from the panels was summarized by illustrating the
anticipated, anticipated excess, encountered, and encountered excess rock
socketing area. The socketing area was overrun by a factor of 7.5.
The original borings were done using a hollow stem
auger. Refusal of the auger was taken as the top of un-decomposed
rock. The specifications required a 2 ft deep socket of the slurry wall
into rock.
In effect, the rock tools were unable to excavate decomposed
rock to the depth of the auger refusal.
The auger refusal was not a viable measure of the top of rock
for slurry wall socketing.
CONTRACTOR PREVAILED |
GeoConSol
