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TRIGEO is a company working in geophysical surveys based in Italy and in Mexico. With a ten year long experience of its staff, trigeo offers a multidisciplinary assistance on several fields, from civil engineering, geotechnics, environmental studies, energetic research, geologic and hydrologic studies, archaeological research and mineral research. The main objective of trigeo is to offer a high quality service to their costumers, using the best and most innovative research techniques in the geophysical field.

 

The main activities of TRIGEO are:

— Seismic refraction, reflection down-hole seismic.
— Masw
— Esac
— Sasw
— Remi
— Vibrometric measurements
— Geoelectric
— Georadar
— Geophysical well logs
— Magnetometry
— Gradiometry
— Electromagnetism.

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SLOPE STABILITY

The joint employment of geophysical surveys through soil characterization permits the study of the processes of a potential or an active landslide.
Seismic refraction and electronic tomography provide detailed sections of a bedrock profile and of the surface slip. With highly portable equipment and low environmental impact, it is possible to survey hardly reachable and remote sites. Our surveys include:
— Internal structure of a slope, the variations and the effects of the movement.
— Geological boundaries that may represent the slip planes.
— Groundwater variations in the involved material.
— Possible causes of the gravitative movement.
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MAPPING AND MONITORING

Laser scanning surveys permit rapid collection of tridimensional reliefs through a point cloud. The employment of the laser scanning methodology in measuring allows the checking and monitoring of gravitative movements and of coastal erosion phenomena. This techniques also permits a high resolution topographic plotting.

The advantages of this technique are:
— A fast survey.
— A rapid return of the final results.

The laser scanning survey permits the acquisition of data from impervious and unsteady sites, simplifies and allows the repeatability of the surveys, providing a monitoring means to verify the evolution of geological phenomena in progress.

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GROUND CHARACTERISATION AND GROUNDWATER RESEARCH

Resistivity measurements along a survey profile allows a detailed mapping of the buried geological structures. The electric properties of the subsurface are used to identify fault plane, lithologic irregularities, variations of water content, etc. Geoelectric surveys can be flexible depending on the depths or of the spaces of interest. The final geological model can be adjusted through a calibration attempts in site. This kind of survey represents a useful means, essential for deep water research, geothermic and mineral investigation.
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ENGINEERING PROPERTIES

Seismic surveys give information to determine geotechnic properties of the subsurface in engineering planning. The acquisition of the data occurs through seismic surveys on surface (seismic refraction, Masw, Sasw, Remi and esac) and Down – Hole and Cross – Hole surveys, which permit the measurement of the speed of P and SH waves. Seismic speed can be combined with the density to calculate the Poison Ratio and elastic modulus like: shear modulus, Young modulus and bulk modulus. The dynamic parameters obtained represent an excellent support for the geotechnic planning and provide useful indications about the characteristics of (rippability).
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LANDFILL CHARACTERISATION

SURFACE CAP AND HDPE INTEGRITY
Evaluation on “cap” integrity and on HDPE membrane in landfills can be obtained through classic techniques of electric tomography and electromagnetic surveys, able to measure electric conductivity without digging pickets. Variations in electric conductivity allow the determination of possible concentrations of leachate and/or damages in the impermeable cover and in the HDPE geomembrane.
MAPPING DRY/WET WASTE
Resistivity measurements allow the distinction of anhydrous waste (high resistivity) from hydrous waste (low resistivity) and saturated in conductive leachate.
SOURCE AND PLUME MAPPING
Resistivity tomography can be used to monitor the contamination level of the subsurface and to locate possible pollution sources and plumes in depth. The data acquired can be processed through 3D models to reconstruct the progress and the pathway of the potential polluting substance.
bonifica

GROUND HAZARD / SERVICE MAPPING

BURIED STRUCTURES, LOCATING LANDFILLS AND UNEXPLODED BOMBS
Geophysical surveys have an important and increasing role in the characterization of the ground beneath former industrial and military sites. Survey targets range from foundation, buried structures, illegal landfill and unexploded bombs. The selection of appropriate techniques may depend on the survey brief and site consideration.
UNDERGROUND STORAGE TANKS
Buried metals USTs and pipes can be rapidly detected using magnetic and non – ferrous metal detection surveys. The combine usage of Metal Detectors, Gradiometer and Georadar allows the localization of any buried structure.
SERVICE AND STRUCTURE MAPPING
Geophysics can provide reliable and accurate information relating to the position of existing buried services and structures as well as general ground characterization. The non – intrusive nature of the surveys limit the ground disturbance making the approach ideal for sensitive sites.
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ARCHAEOLOGY AND BUILDING SURVEY

An integrated geophysical approach is used to detect buried archaeological structures. Foundations and buried structures are detected using high resolution magnetic gradiometry, GPR and a 2D – 3D Geoelectrical surveys. The final deliverable are interpretative plans indicating the location and the characteristics of archaeological features of interest.
3D BUILDING SURVEY AND MODAL ANALYSIS
Geophysics surveys supporting engineering studies on structural building elements are finalized at planning structure reinforcement or at evaluating structure vulnerability. A combination of GPR and 3D Geoelectrical surveys are mostly used, detecting non – invasively the presence of water, voids and types of foundation. GPR surveys through high frequency antenna allow the study of the rebars and structural elements. Modal analysis of buildings is carried out through triaxial seismometers providing the oscillation frequency of the structure.
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SEISMOMETRIC NETWORKS AND SEISMIC MICROZONATION

HYPERDENSE SEISMOMETRIC NETWORKS
Development, implementation and management of instrumental seismometric networks with a wide range of measurement in stand – alone and in remote centralization through digital telemetry help monitoring natural phenomena such as earthquakes, nstead of volcanism, landslides, sinkholes. The aim is to study the time evolution of the phenomenon and its progress, allowing emergency aid in the damaged areas. These techniques are used also for damages caused by industrial accidents or in restoring of big damaged structures.
SEISMIC MICROZONATION
Seismic microzonation is based on the observation of the different damage distribution of an earthquake, studying the effects produced by it locally. In the last few years, new methods have been experimented based on instrumental surveys and on numeric models aimed at foretelling and preventing these effects on a different areal scale.

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P.Iva 02024110518 / Email info@trigeo.it / Pec trigeo@pec.it

certificatoCERTIFICATO ISO N°14PA00028P06
Addetto alle prove non distruttive e semidistruttive nel settore civile.

FIRENZE

Via Nino Bixio n. 9
50131 Firenze – Italy
T/F (+39) 055 400 619

AREZZO

Via Trasimeno n.7
52100 Arezzo – Italy
T/F (+39) 0575 294 500

CITTÀ DEL MESSICO

Monte Elbruz 132 int. 302
Colonia Polanco V seccion
11560 Del. Miguel Hidalgo, Mexico (DF)
T. (+52) 55 5280 5678