A Self-Learning Manual - Institution of Engineers Mauritius

A Self-Learning Manual
Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU
caps and it is not necessary to use any dowels and capping plates in their
connection.
(ii) Tension piles
A number of hook-ended bars are welded to the top of H-piles.
(iii) Piles with bending moment at their head (tension or compression)
The depth of embedment of piles into pile caps is substantially increased
and loads are transferred by horizontal bars welded to piles’ flanges.
Fig. Different arrangement of pile head details
18. It is not necessary to design nominal reinforcement to piles. Is it
true?
In BS8110 and BS5400 Pt.4, they require the provision of nominal
reinforcement for columns. However, for pile design the requirement of
nominal reinforcement may not be necessary. Firstly, as piles are located
underground, the occurrence of unexpected loads to piles is seldom.
Secondly, shear failure of piles is considered not critical to the structure
due to severe collision. Moreover, the failure of piles by buckling due to fire
is unlikely because fire is rarely ignited underground.
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