Vincent
T. H. Chu
is renowned internationally as
walking
encyclopedia of civil engineering.
Author of a number of
widely acclaimed
civil engineering books, Mr Chu is recipient of various reputed awards
including Young Engineer of
the Year Award 2008
(Merit) by the Hong
Kong
Institution of Engineers &Ombudsman’s
Award 2007 (under
complaint-related category). He is also listed
in
11th Edition of Marquis Who's
Who in Science and Engineering. ConcreteBasics.org
thanks him for his exemplary contribution to the cause of civil
engineers
around the world.
When a hammer
with initial motion strikes a stationary pile, the transfer of energy is
most efficient when the two masses are comparable.
That is the reason why some
codes limit the ratio of weight of hammer to the weight of pile to be
more than
0.5.
If the weight of hammer is too low, most of energy during hammer
driving
is distributed to the hammer and this causes tension to be induced in
hammer and
results in inefficient transfer of energy.
Reference:200
Questions and
Answers on Practical Civil Engineering Works by
Vincent Chu
