Design and Load Testing of Large Diameter Open-Ended Driven Piles (2015) / Chapter Skim
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102 APPENDIX C Interview Notes of Selected States Using LDOEPs
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103 NCHRP 45-05 Interview Notes – Alaska Department of Transportation Page 1 of 3 Agency: Alaska Department of Transportaon and Public Facilies Participants: Dave Hemstreet, P.E. Interview Date: April 22, 2014 Primary interview was with Mr.
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104 NCHRP 45-05 Interview Notes – Alaska Department of Transportation Page 2 of 3 o To help reduce environmental issues with impact hammers, piles are vibrated in to extent possible, and then completed with impact hammer. o Benefit of adopng 48in pipe piles has been seen with changes in seismic design codes.
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105 NCHRP 45-05 Interview Notes – Alaska Department of Transportation Page 3 of 3 Lessons Learned Do not use static analysis methods alone to predict resistance. They are too conserva ve due to not scaling up to larger diameters.
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106 NCHRP 45-05 Interview Notes – California Department of Transportation Page 1 of 1 Agency: California Department of Transportaon Participants: Sharid K Amiri, Ph.D., P.E.
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107 NCHRP 45-05 Interview Notes – Florida Department of Transportation Page 1 of 2 Agency: Florida Department of Transportaon Participants: Larry Jones, P.E. Rodrigo Herrera, P.E.
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108 NCHRP 45-05 Interview Notes – Florida Department of Transportation Page 2 of 2 o Insufficient venting led to longitudinal cracking in several piles. o As the pile is driven, the pile experiences axial shortening during a hammer blow.
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109 NCHRP 45-05 Interview Notes – Kentucky Transportation Cabinet Page 1 of 3 Agency: Kentucky Transportaon Cabinet (KYTC) Participants: Darrin Becke, P.E.
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110 NCHRP 45-05 Interview Notes – Kentucky Transportation Cabinet Page 2 of 3 Key question was development of the plug – if the plug is being relied upon to either achieve penetration into the chert or to achieve the nominal pile resistance, how could the certainty of the plug developing and its locaon be determined? o Wanted to keep the pile open to get it down relavely easily, but needed it to plug to get the pile to drive the minimum distance into the chert required for fixity.
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111 NCHRP 45-05 Interview Notes – Kentucky Transportation Cabinet Page 3 of 3 radiation damping allows CAPWAP to beer model the signals recorded by the dynamic pile testing equipment. o The pile resistances calculated with CAPWAP using the radiation damping model also generally produced higher end bearing resistance values than the CAPWAP models without the radiation damping.
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112 NCHRP 45-05 Interview Notes – Louisiana Department of Transportaon and Development Page 1 of 2 Agency: Louisiana Department of Transportaon and Development Participants: Ching Tsai, P.E. Chris Nickel, P.E.
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113 NCHRP 45-05 Interview Notes – Louisiana Department of Transportaon and Development Page 2 of 2 Driving Aides Evaluated on a case by case basis Je ng is somemes allowed, usually no more than through the scour zone where no side resistance is counted on for design. Lessons Learned Comfortable with spun cast concrete piles, paying aention to details such as reinforcement at the top (for driving stresses)
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114 NCHRP 45-05 Interview Notes – Minnesota Department of Transportation Page 1 of 2 Agency: Minnesota Department of Transportaon Participants: Gary Person, P.E. Derrick Dasenbrock, P.E.
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115 NCHRP 45-05 Interview Notes – Minnesota Department of Transportation Page 2 of 2 Dynamic and Load Testing Wakota Bridge provides a good case history of early use and testing of LDOEPs by MnDOT. Main issue is demonstrating required resistance via dynamic testing methods.
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116 NCHRP 45-05 Interview Notes – New York State DOT Page 1 of 3 Agency: New York State DOT Participants: Steve Borg, P.E. – Civil Engineer II (Geotechnical Engineer)
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117 NCHRP 45-05 Interview Notes – New York State DOT Page 2 of 3 Piles tend to be over driven (driven to higher resistance than necessary if setup in clay was beer defined) in order to meet the schedule.
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118 NCHRP 45-05 Interview Notes – New York State DOT Page 3 of 3 compressive stresses in the piles during driving is also a major part of dynamic testing of these piles. Pre-Jeng o On Long Island, pre-je ing is typically used.
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