ERG ISAB Agip Petroli Polimeri Europa BP Australia Enichem Erm Italia Dames & Moore Fina Italiana Foster Wheeler Hickson Coatings Montgomey Watson Oxon Italia Woodward Clyde International
Seismic, refraction and reflection. Non-invasive investigations of seismic refraction
and reflection with inversion techniques of linear data. Typical dataset with frequencies
from 5 to 100 Hz on stretches from 25 to 110 meters. Inter geophones and distance
from 1 to 10 m. .. Energized hammer and explosive seismic survey design infunzione
depth from 1 to 100-200 m. .. Resolution of inquiry to decimeters.
Seismic survey in the hole (Cross-Hole and Down-Hole); Slightly invasive investigations,
as appropriate drill made , if they are in addition to knowledge lithostratigraphic
buoyancy, you need to have detailed information on the geomechanical properties of
soils and their possible amplification due to vibrations of natural origin (earthquakes)
or artificial (machine vibrant, urban traffic, rail lines,...).
Seismic tomography Particularly detailed survey (with resolution up to a few decimetres)
based on the technique of computerized axial tomography (CT) allows more than 3-D
reconstruction of structures and artifacts buried, the assessment of the state of
the materials in order to evaluate the elastic properties static
Effects of vibration
on artifacts Calculation of the resonance frequencies of reinforced concrete structures
and masonry, and their variation over time. Assessment of the status of materials
in order to evaluate the properties and changes of the elastic-static material approx.
Calculation of the amplification factors of land Survey aimed at calculating the amplification
factors of the site through the use of experimental techniques (Kanai &Tanaka; Nakamura)
with three-component seismic sensors with instrumental response between 0.1 and 20
Hz, and modeling of site response techniques with finite element. Investigations
associated with Cross-Hole and Down-hole lead to the definition of the factor FA
(Amplification factor), the coefficient of foundation (epsilon) and elastic parameters
(Young, Poisson, Vp / Vs, ..) of the investigated lithologies.
Seismic micro-zoning Seismic
zoning for large-scale analysis techniques that exploit spectral sensors with three
components with instrumental response between 0.1 and 30 Hz, to create seismic hazard
maps for easy reference used in the process of planning.
Geoelectrical Non-invasive
investigations aimed mainly at finding water and hydrological analysis. Taking advantage
of the artificial potential field between two electrodes, can reach great depths
of investigation to characterize the land inbase their electrical conductivity.
