May 20, 2012

Ground Freezing – an overview

Groundfreezing is a construction technique that has been used of over one hundred years to provide temporary earth support and groundwater control. Applications are found in the underground civil, mining and environmental remediation industries. [Read More...]

Recent Ground Freezing applications

Keeping it cool in the Big Apple

Keeping it Cool in the Big Apple

Paul Schmall, PE, Vice President and Chief Engineer, and Dr Joseph Sopko, PE, Regional Manager, with specialty geotechnical contractor Moretrench, discuss how ground freezing techniques have kept TBMs on course for various projects in New York City [Read More...]

Fig. 10: Temperature Distribution after 150 Days of Freezing

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.
No. 7 Line Tail Tunnel Freeze

No. 7 Line Tail Tunnel Freeze

The South Tail Tunnel of the No. 7 Subway Line in NYC recently required ground freezing and permeation grouting to provide ground stabilization and groundwater cutoff. [Read More...]