GEOPHYSICS (SEISMIC-GEORADAR-ELECTRIC-MAGNETIC VD) SURVEYING ›

 GEORADAR (GPR - Ground Radar) WORKS

 
  Goeradar method; is an electromagnetic reflection technique that records signals reflected from an interface having a dielectric contrast of the electromagnetic signal transmitted via an underground signal generator antenna via a receiving antenna. Due to the high frequency used, it is one of the geophysical methods which facilitates the solution of many engineering problems with high resolution data quality.
 
With Zond 12e, Radarteam and IDS brand georadar equipments, underground structures, location, geometry and depths of near surface are analyzed in 2D and 3D environment to solve underground problems.

Antennas in our hand: 1500 MHz, 900 MHz, 750 MHz, 500 MHz, 300 MHz, 100 MHz shealded antennas, 25 MHz, 38-75-150 MHz Dipole antennas, 200-600 MHz Multifrequency antennas, 900-100 MHz multifrequency antennas

WELL RADAR STUDIES
 
Determination of lithological change boundaries, anchorage, pile, etc. by determining the georadar surveying in vertical and / or horizontal wells with drilling or purposeful opening, and determination of fracture systems and zones in the rocks are carried out by our expert personnel.
 
SCOPE OF APPLICATION
 
  • Underground Mapping
  • Bridge and Tunnel Investigations with Non-Destructive Impact
  • Road Surveys (Road and Airport)
  • Well applications
  • Geological and Mining Applications
  • Environmental Applications
  • Geotechnical Applications
  • Archaeological Surveys
  • Building Analysis (Accessory Detection)
  • Investigation of Ballast Thickness and Pollution
  • Determination of deformation propagation
  • Superstructure Control on Highways
  • Determination of Karstic Cavity
SEISMIC METHODS
 
  In seismic methods, an artificial vibration is usually generated and recorded by the geophones of the signals that are broken or reflected from the environments with different elastic properties underground. we use one or more of the following methods according to engineering problems. These methods include;
 
  • Seismic Breaking
  • Seismic Reflection
  • rummy
  • MASWIN
  • Microtremor
  • SPAC- (Spatial Relation Method)
 
    As a result of seismic methods, the following engineering problems are solved.
 
  • Determination of static planning parameters and dynamic soil parameters
  • Determination of the soil profile (stratigraphy)
  • Analysis of fault and similar discontinuities
  • Determination of Slip Wave Velocity in the city and on concrete roads
  • Determination of Ground Vibration Period
  • In the selection of engineering constructions (Skyscraper, dam, motorway, tunnel and airport etc.)
  • Determination of sliding surfaces such as landslides
  • In mineral exploration such as oil and natural gas
  • In Surveys on Environmental Problems
  • Determination of Natural Gas Underground Storage Areas
  • Noise and Shake Analysis
  • Site selection of waste disposal sites and chemical waste sites
  • Determination of Geothermal Energy Sources and Mining Fields
 SPAC (Spatial Auto Corelation) method allows to determine Vs shear wave velocity to any depth (sledge, gun, etc.) very deeply. As the radius increases, it goes up to several km.
 
ELECTRICAL RESISTANCE - GEOELECTRIC TOMOGRAPHY - MULTI ELECTRODE RESISTANT
 
 
The basic principle is that the electric currents sent from underground to underground such as A and B are based on the measurement of the underground voltage at two points, M and N. different measurement techniques based on the amount of electrodes and the geometry of the array have been developed. These are mainly; schlumberger, wenner, dipole dipole, pol dipole techniques. When determining the survey technique, the purpose of the study, site conditions and geological characteristics are taken into account.

 Multi electrode METZ SAS48 multichannel geoelectric equipment is used to prepare Geoelectric and Tomographic Sections along a profile along the desired depth. Underground strata, slip planes, ore veins, geothermal fields, faults and discontinuities can be determined.

From the 1D and / or 2D geoelectrical resistivity surveying, the 3D resistivity distribution diagram of the underground is obtained and the geometry of the geologic elements such as underground layer, fault lens etc. are revealed more clearly.

Generally ;

  • Determination of the soil profile (stratigraphy)
  • Analysis of fault and similar discontinuities
  • Determination of Geothermal Fields and Groundwater Potential
  • In Archaeological Research
  • In the selection of Engineering Places (such as Skyscraper, Dam, Auto Road, Tunnel and Airport)
  • Determination of sliding surfaces such as landslides
  • In Metallic and Non-Metallic Mineral Researches
  • In Surveys on Environmental Problems
  • Determination of Natural Gas Underground Storage Areas
  • Noise and Shake Analysis
  • Site selection of waste disposal sites and chemical waste sites