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Washington, DC 20590
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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

Paper


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

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Updated: 02/12/2018
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000