Recent software developments have introduced models that couple the traditional heat transfer model with groundwater flow models to evaluate the required freezing time for ground freezing systems and to evaluate the required refrigeration loads. This paper discusses the application of these models and compares them to actual field results on key ground freezing projects.
Read MoreGround Freezing for Tunnel Cross Passages
By freezing the zone between the two larger tunnels, the contractor can mine through the hard, water-tight ground without collapse or groundwater infiltration.
Read MoreTBM Repair Using Liquid Nitrogen
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 MoreSoutheast Collector (SeC) Gravity Trunk Sewer Ground Freezing
GeoMontrĂ©al 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