Ground-borne noise induced by trains and
construction works has become day by day
a constant issue to the tranquility of urban
areas. Population increase and city developments mean that more areas will be subjected
to uncomfortable noises and the need for tranquility is ever more necessary. So far these
induced vibrations have been hard and expensive to predict, thus less time consuming and
more accurate computational models are required. This is also the focus of this master’s
thesis where a semi-analytical model developed by several researchers will be evaluated.
The semi-analytic model is used to predict the
propagation of waves in a media due to vibrations from external source and the impact
they have on the surrounding area. A thorough investigation of the model is performed
by taking into account the influence of the soil
properties in the dynamic amplification.
This master’s thesis also includes an experimental part, where geophones are used to
measure the vibrations from trains at a location specified by COWI. The data obtained
from the measurements is used to find the
properties of the soil and further validate the
semi-analytic method.
To conclude, a comparison between the measured vibrations and the ones simulated from
the model are analysed and compared in order
to obtain a closer fit as possible.