During tunnel mining operations under the Fraser River in Vancouver, the Tunnel Boring Machine (TBM) was damaged and required immediate repair. Liquid nitrogen was used to freeze the soil at the cutter head so repairs could be completed.
Read More
Southeast Collector (SeC) Gravity Trunk Sewer Ground Freezing
GeoMontréal 2013 Joseph A. Sopko, Ph.D., P.E., Adam Curry, P.E. & Robert R. Chamberland Moretrench American Corporation, Rockway, New Jersey, U.S.A Behzad Khorshidi, Ph.D., P.Eng Strabag Inc., Pickering, Ontario, Canada ABSTRACT The 15 km long Southeast Collector (SeC) Gravity Trunk Sewer will augment the existing York Durham Sewage System (YDSS) accommodating the anticipated population […] Read More
Remediation of Distressed Frozen Earth Cofferdams
Paper describing an aggressive ground freezing approach as the final solution to a complex problem of site geometry and unexpected groundwater conditions. Read More
Largest Frozen Ground Excavation in North America For Excavation of Crown Pillar
Following the success of other ground freezing projects in the area, an ambitious scenario was proposed which would result in the largest ever frozen ground excavation in North America. The field and laboratory investigations are described as well as the engineering analyses used in the design of the 61-meter diameter, 35-meter deep frozen earth cofferdam. Read More
Patent – Groundfreezing installation accommodating thermal contraction of metal feed pipes
Patent 7,438,501: This invention provides a solution to the problem of feed pipe thermal contraction in a ground freezing system…the feed pipe is constructed of metal, preferably steel, so that its thermal contraction is much reduced compared to HDPE pipes.
Read More
Patent – Method and apparatus for artificial ground freezing
Patent 6,796,139: This invention encompasses a method and apparatus for ground freezing that makes use of cooling techniques resulting in circulating fluid temperature of -50°C (-58°F) or less. This has the great advantage of allowing the freeze pipes to be spaced relatively far apart while still creating an impermeable frozen earth barrier in a reasonable period of time.
Read More
