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Newmans Geotechnique Inc. (NGI)

Ground Deformation

Ground freezing usually has a stability component in addition to the typical objective of water control.  While accurate deformation magnitudes are difficult to predict (due to the fact ground strength parameters vary orders of magnitude relative to ground thermal parameters), it is possible to do special laboratory testing to understand  both the frozen and unfrozen, static and time dependent strength parameters.  We can arrange for these tests, interpret the results, and carry out detailed finite element calculations to put an upper and lower limit on anticipated ground movement.

In doing these calculations we can consider the relative impact of combining auxiliary support systems with the frozen ground to minimize deformations. 

While prediction is difficult due to variations in ground parameters, detailed modeling is very useful for helping understand critical processes.