Negative Skin Friction Downdrag

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As an example: Maple Grove, MN New Interchange Soil Profile at site => Predicted 3-5 inches of settlement. Piles driven prior to fill placement. PROBLEMS? (Stay tuned!)
FUNDAMENTAL QUESTION #1: WHAT IS NEGATIVE SKIN FRICTION (a.k.a. DOWNDRAG or DRAGLOAD)? Should we estimate negative skin friction using the same relationships and calculations as we use for positive skin friction (Nordlund, Tomlinson, etc.)? Neutral plane and other approaches are available to identify where negative friction stops and positive friction begins.
Page 1 and 2: Negative Skin Friction Aaron S. Bud
Page 3 and 4: FUNDAMENTAL QUESTION #1: WHAT IS NE
Page 5: FUNDAMENTAL QUESTION #1: WHAT IS NE
Page 9 and 10: FUNDAMENTAL QUESTION #2: HOW MUCH D
Page 11 and 12: INSTRUMENTATION OF A BRIDGE (GAGES
Page 13 and 14: INSTRUMENTATION OF A BRIDGE (GAGES
Page 15 and 16: OPTIONS AVAILABLE TO REDUCE NEGATIV
Page 17 and 18: INSTRUMENTATION OF A BRIDGE MAPLE G
Page 19 and 20: Gage A-48 INSTRUMENTATION OF A BRID
Page 21 and 22: Raw Microstrain . 0 50 100 150 200
Page 23 and 24: 0 50 100 150 200 250 300 350 Temper
Page 25 and 26: Microstrain . 0 50 100 150 200 250
Page 27 and 28: ESTIMATED VS. MEASURED
Page 29 and 30: Depth from Pile Cap (ft) . LOAD PRO
Page 31 and 32: LOAD PROFILE REGIONS Sleeved 0 50 1
Page 33 and 34: INSTRUMENTATION OF A BRIDGE CROSSTO
Page 35 and 36: INSTRUMENTATION OF A BRIDGE CROSSTO
Page 37 and 38: 4/2/2008 6/1/2008 7/31/2008 9/29/20
Page 39 and 40: CONCLUSIONS The strain and deflecti
Page 41 and 42: CONCLUSIONS MnDOT has continued to

Negative Skin Friction Downdrag

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