Archived: Interstate Technical Group on Abandoned Underground Mines
Fourth Biennial Abandoned Underground Mine Workshop
Real Time Monitoring of Subsidence Along Interstate I-77, Summit County, Ohio: Table 1
Table 1. TDR Cable Drilling Record
Hole Designation | Location | Depth | Hole Length (Feet) | Uncut Cable length (Feet) | Comments | Grout | Maximum | |||
---|---|---|---|---|---|---|---|---|---|---|
Begin Station | End Station | Offset (Feet) | Minimum | |||||||
TDR1-N1 | NB berm lane | 141+00 | 146+00 | R71.5 | 5' 11" | 9' 8" | 555 | 658 | grouted 850 gal | |
TDR2-N1 | NB traveling lane | 141+00 | 146+00 | R59 | 4' 9" | 11' 0" | 570 | 675 | STA 144+10 to STA 145+00 very low resistance and lost circulation while drilling; drill bit drop from a depth of 8'6" at STA 144+10 to a depth of 10'0" at STA 144+75 and to a depth of 11'0" at STA 145+00 then stiff resistance began at STA 145+00 | grouted 600 gal discontinued grouting when back reamer became plugged |
TDR1-N2 | NB berm lane | 146+00 | 151+00 | R71.5 | 6' 3" | 6' 5" | 525 | 500 | STA 147+05 to STA 149+50
very low resistance; STA 150+50 STA 152+60 no resistance, driller could not change direction of drill, as if bit was moving along inside a pipe pulled bit back to STA 150+00 and driller was able to direct drill out through berm as cable was being pulled into hole, it was necessary to make adjustment at drill rig with 90 feet of rod still in hole, cable got stuck in hole and only 4 ft was pulled out at rig, when attempt was made to pull cable out at other end, cable immediately snapped off |
no grout |
TDR1-N2 redrill | NB berm lane | 146+00 | 151+00 | R74 | 5' 2" | 16' 2" | 540 | 550 | STA 147+05 to STA 149+50 very soft; | no grout |
TDR2-N2 | NB traveling lane | 146+00 | 151+00 | R59 | 4' 9" | 10' 4" | 540 | 552 | STA 148+50
soft; STA 149+50 to STA 150+50 very stiff resistance; minor seepage of drilling mud at surface cracks at passing lane STA 150+50 |
no grout |
TDR3-N | trench adjacent to NB passing lane | 141+00 | 151+00 | R35 | 3' 0" | 3' 0" | 1000 | 1040 | trench | 2 ft of LSM backfill over cable |
TDR1-S1 | NB berm lane | 136+00 | 141+00 | R72.5 | 3' 6" | 7' 0" | 570 | 675 | STA 140+75 hit 4 inch underdrain STA 139+00 to STA 138+00 soft STA 136+95 to STA 137+05 boring fluid heaved pavement 8-12 inches along seam between the traveling lane and the berm lane over an area of about 10 ft long by 3 ft wide; using backhoe it was possible to displace fluid and relevel pavement |
grouted 600 gal |
TDR2-S1 | NB traveling lane | 136+00 | 141+00 | R59 | 5' 8" | 8' 0" | 570 | 675 | STA 135+75 to STA 137+85 very soft; boring fluid percolated up through a lateral crack in the NB passing lane where there is a patch in pavement | grouted 600 gal clogged system |
TDR1-S2 | NB berm lane | 131+00 | 136+00 | R74 | 7' 11" | 9' 0" | 525 | 550 | STA 133+00 to STA 133+50 very soft | no grout |
TDR2-S2 | NB traveling lane | 131+00 | 136+00 | R59 | 7' 4" | 8' 11" | 540 | 550 | STA 134+75 to STA 135+50 soft | no grout |
TDR3-S | trench adjacent to NB passing lane | 131+00 | 141+00 | R35 | 3' 0" | 3' 0" | 1000 | 1040 | trench | 2 ft of LSM backfill over cable |
TDR4-N1 | SB lanes | 141+00 | 146+00 | L51 | 5' 3" | 9' 9" | 480 | 560 | no grout | |
TDR4-N2 | SB lanes | 146+00 | 151+00 | L51 | 5' 4" | 18' 0" | 540 | 555 | no grout | |
TDR4-S1 | SB lanes | 136+00 | 141+00 | L51 | 5' 3" | 11' 0" | 540 | 620 | no grout | |
TDR4-S2 | SB lanes | 131+00 | 136+00 | L51 | 5' 0" | 9' 10" | 540 | 560 | STA 133+50 med. soft resistance | no grout |
Conduit | SB lanes | 141+00 | 141+25 | 105 | N/A | N/A | ||||
Conduit | NB lanes | 141+00 | 141+00 | 6' 10" | 9' 0" | 100 | N/A | N/A |