Before starting the detailing work for foundations,
the following general needs concerning machine foundations should be fulfilled
and the results should be verified.
1. The foundation should have contained the capacity
to bear the superimposed loads devoid of producing shear or crushing failure.
2. The settlements should have been inside the
allowable limits.
3. The amalgamated centre of gravity of machine and
foundation should have been maintained in the equivalent vertical line like the
centre of gravity of the base plane.
4. There should have been no resonance, therefore the
normal frequency of the foundation–soil system should have been either too big
or too small with regard to the operating frequency of the machine. Toward
low-speed machines, the natural frequency should have been high.
5. The amplitudes under service conditions should be
maintained under allowable limits which are recommended by the machine
manufacturers.
6. All rotational and correlating parts of a machine
should be well-adjusted efficiently with the purpose of reducing the unbalanced
forces or moments.
7. If necessary, the foundation should be planned in
an efficient way with the intention of allowing a consequent adjustment of
natural frequency by adjusting the base area or form of the foundation as may
be essential afterward.
To read the complete article, go through the following
link. theconstructor.org
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Published By
Rajib Dey
www.constructioncost.co
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