TELESCOPIC SHAFT
The stress and strain imposed on vertical HDPE pipes in landfills is immense due to settlement
within the waste itself. Vertical pipes are subject to both axial and radial stresses, but the
axial stress is by far the most damaging. It is caused by ‘skin friction’ between the outside
wall of the pipe and the surrounding waste as it settles. Loads as high as 100Tf are not uncommon.
If axial movement can be accommodated during settlement then axial stress is eliminated.
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