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Georadar sensing

Georadar sensing is performed with the use of georadars operating at depths up to 5 m and a 20 cm resolution and providing for detection of density fluctuations of the surveyed surface at creation of georadiolocation profile, thus enabling this method to reveal underground communications including those without a temperature contrast.

Georadiolocation or georadar survey is a modern non-destructing method of soil and construction base inspection which implies analysis of pulses reflected from boundaries of spheres with different electrophysical characteristics.

Modern georadars are a powerful geophysical instrument whose application provides for acquisition of large amounts of detailed data during a relatively short time period. Application of a georadar for survey allows creation of a high-reliability volumetric picture during analysis of different spheres at varied depths.

Georadar survey is used for inspection of:

  • soil, which allows detecting the composition and width of layers, presence of frozen or over-moisturized areas, land slide processes and tectonic distortions, cavities, deconsolidation areas, underground communications, boundaries of soil and anthropogenic waters, etc.;
  •  automobile roads, which allows assessing the width of road surface construction layers, types, humidity and density of soil and under-surface base; location of soil water levels, location of a sliding curve at land slide areas, spatial contour of geologic horizon base under a back of ballast bed, locations of deconsolidated soil, cavities and infiltration of underground waters;
  • bases and industrial floorings;
  • constructions of buildings (beams, floors, pillars, etc.), which allows detection of inner cracks, uneven settlement, presence of iron reinforcement and its deformation, infringement of construction regulations and project requirements, assess the density and toughness of materials;
  • ice situation, which allows performing control of the width and condition of ice both during freeze-up and flood water periods.

In automobile roads planning the economic effect of application of 3D models acquired with the use of georadars is reached due to reduction of drilling operations with a several-times’ enhancement of reliability of the engineering-geologic data, choosing of efficient reconstruction and overhaul types differentiated by automobile road areas.

Exploitation of a shelf zone requires acquisition of data on sea bottom condition, underwater and on-surface constructions. A modern method of sea bottom, underwater and on-surface construction inspection implies analysis of pulses reflected from boundaries of spheres with different electrophysical characteristics.

The georadiolocation method allows observation of ice for assessment of its width, monitoring in the areas of automobile ice passages, winter trails, detection and localization of uneven areas inside ice massives.

Georadiolocation survey can be performed by contact - shifting a georadar antenna on the ice surface, and non-contact - placing a georadar on board an aerial survey aircraft with the use of a side-looking locator.