Building Construction Handbook, Eighth Edition

(Nancy Kaufman) #1

Steel Sheet Piling ~ apart from cofferdam work steel sheet can be
used as a conventional timbering material in excavations and to
form permanent retaining walls. Three common formats of steel
sheet piles with interlocking joints are available with a range of
section sizes and strengths up to a usual maximum length of
18„000:-


Installing Steel Sheet Piles ~ to ensure that the sheet piles are
pitched and installed vertically a driving trestle or guide frame is
used. These are usually purpose built to accommodate a panel of
10 to 12 pairs of piles. The piles are lifted into position by a crane
and driven by means of percussion piling hammer or alternatively
they can be pushed into the ground by hydraulic rams acting
against the weight of the power pack which is positioned over the
heads of the pitched piles.


Note: Rot-proof PVC sheet piling is also available.


Cofferdams

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