Stabilization of Existing Structures The Underlying Ground

Often, existing structures need to be stabilised because the original design did not account fully for all the problems related to permafrost conditions and/or forecasted thermal boundary conditions changed. The addition of anchors and concrete to the foundations of existing structures and into the ground has become widely used to stabilise structures and increase the bearing capacity of the underlying terrain (see examples mentioned earlier in this chapter). The costs involved are generally very high and the long term effectiveness is not yet known.

Figure 21. Chairlift station with three point-bearings (a), which can be displaced using hydraulic pumps (reprinted from Phillips et al. 2007. Structural design by Leitner AG). Hydraulic pump (b) under the T-girder allowing repositioning of the structure.

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