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Largest Frozen Ground Excavation in North America For Excavation of Crown Pillar
Combined Sewer Overflow Tunnel
[…] off and excavation support for deep shaft sinking. Design and application of the freezing program requires specialized engineering knowledge and experience, and its success is predicated on accurate subsurface information. Moving groundwater and groundwater contamination can inhibit freeze closure. In such an event, accurate and early diagnosis of the condition and timely reaction to […]
Read MoreBoston Central Artery Tunnel
[…] of frozen ground beyond the box perimeter, and In excess of 2,000, 4-1/2-inch O.D. steel freeze pipes installed from 46 ft. to 60 ft. below ground surface. Accurate spacing and freeze pipe location was critical to the success of the stabilization program. Finite element modeling was performed to determine the transient heat flow from […]
Read MoreGround freezing in construction
[…] operations instead of large scale dewatering operations that have environmental consequences or require complex and expensive treatment operations. Ground freezing success Ground freezing is successful when completed by experienced contractors that have the required specialized equipment. It is an interactive process requiring advanced engineering, accurate drilling as well as custom made refrigeration and instrumentation equipment.
Read MoreKansas Underground Salt Museum
[…] ensure that the freeze continued through the critical soil/rock interface. Quality control and quality assurance measures prior to and during freezing operations included borehole surveying to confirm accurate alignment; installation of a central pressure relief well; instrumentation to confirm adequate frozen ground propagation; and piezometers installed outside of the freeze perimeter to measure groundwater […]
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