MGS telescopic shafts provide a reliable and sustainable solution for long-term extraction and monitoring of landfill leachate.

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.

MGS telescopic shafts ensure minimum stress and maximum performance:

• Move axially during settlement
• Act as a column, not as individual sections
• Have minimum lateral deflection at the joints
• Able to accommodate settlement over the entire length including the bottom of the base section
• Known and repeatable shear pin strength

• Tested shear pin strength
• Can be built up in 3m sections as filling occurs
• Accommodate over 30% settlement
• No requirement for gravel surround other than base section
• Pipes designed to resist radial stress
• Same wall thickness throughout length for simple site installation