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V1.4 March 15
5.3 Telescopic joint
Telescopic joints are generally used in situations where man made fills are constructed such
as embankments and dams and should be used where settlements of over 2% are
expected. Total settlement up to 30% can be accommodated.
Each telescopic joint allows for 150mm vertical movement thus avoiding any buckling of the
Casing due to excessive axial loading.
Positions and quantities of telescopic couplers should be calculated in accordance with the
ground conditions of each installation.
Telescopic joints are 700mm long and can accommodate
150mm of compression (settlement) or extension (heave).
They are usually supplied in the fully extended version
(see right) to allow for settlement but can be altered on site
by loosening the four screws and re-positioning the ends.
Telescopic joints are installed using the same method of
installation as Casing lengths. Please see the installation
section for installation methods.
75mm
travel
75mm
travel
