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Statement of qualifications
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Keller’s ground freezing experts have been involved in several hundred frozen ground projects.
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Curriculum Vitae | Joseph Sopko, Ph.D., P.E.
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Curriculum Vitae for Joseph Sopko
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Artificial ground freezing: State of the practice
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This keynote paper is a tribute to those devoted to the practice of ground freezing. Authored by Joseph Sopko.
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Site investigation for shaft sinking projects requiring artificial ground freezing
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Info required for the successful design and construction of shafts.
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Artificial ground freezing on a large scale
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Past mine projects using an innovative ground freezing approach.
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Artificial ground freezing vs grouting
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Identifies factors which make AGF more cost-effective vs grouting.
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Ground freezing for two frozen shafts at the Bergen Point Outfall Tunnel
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Ground freezing provided earth support and groundwater control.
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Ground freezing on a large scale and its historical importance in deep mine development
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Past mine projects worldwide where ground freezing was essential.
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Design of ground freezing for cross passages and tunnel adits
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Design procedures related to frost action.
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Factor of safety in ground freezing design
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Procedure and reports on key recent projects.
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New design method for frozen earth shaft support
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3d models have made traditional methods relatively obsolete.
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The use of liquid nitrogen systems converted to brine
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Discussion of problems related to this method.
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Design of frozen earth structure for cross passages excavation
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Ground freezing advantages over other ground improvement methods.
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Ground freezing for tunnel shafts and adits
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Earth support and groundwater control for DC Water's Clean River project.
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A successful case of water cut-off by ground freezing
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Field and lab testing and engineering analysis required for freezing.
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Grouting for freezing
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Field procedures used to locate unfrozen zones and more.
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Forensics by freezing
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Case histories where ground freezing was used as a remedial technique.
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Coupled heat transfer and groundwater flow models for ground freezing
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Discusses application of models and compares them to field results.
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Ground freezing for tunnel cross passages
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Freezing between two tunnels allows mining through water-tight ground.
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TBM repair using liquid nitrogen
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Tunnel mining operations under The Fraser River in Vancouver.
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