Ground Penetrating Radar services & Geophysical Surveys
LOOKING THROUGH THE PAST TO BUILD THE FUTURE
GeoSearches Inc. is proud to be the leading name within the Geophysical Industry . We specialize in nondestructive investigation and engineering geophysics using advanced methods—including ground-penetrating radar (GPR)—to survey environmental and geotechnical structures, buildings, and engineering infrastructure, including roads, airports, and railways. Call or email for more information about our ground-penetrating radar and geophysical services.
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Reducing Risk & Cost
GPR is a geophysical survey method that uses radar pulses to image the subsurface, allowing clients to “see” underground. Ideally, GPR is performed prior to major projects, as it's crucial to know what's going on underground at a site before development begins. GeoSearches Inc. is proud to support an impressive range of clients worldwide who understand that our service is a smart investment in their future—knowing more about site conditions upfront reduces the risk of mid-project delays, schedule interruptions, and design changes. By reducing these problems, we also reduce the overall project cost.
Our Method
Our method employs nondestructive and noninvasive investigative equipment to provide insight into a site's condition. Using electromagnetic signals in the microwave band (UHF/VHF frequencies) of the radio spectrum, we’re able to detect reflected signals from subsurface structures. This process requires both a transmitting and a receiving antenna or a single antenna with both functions. The transmitting antenna radiates short pulses of high-frequency (usually polarized) radio waves into the ground. When the wave hits a buried object or a boundary with different dielectric constants, the receiving antenna records variations in the reflected return signal.
Learn more about our geophysical services.
The Science of GPR
GPR can be used in a variety of media, including soil, rock, freshwater, ice, pavement, and structures. It can detect objects, voids, cracks, and changes in material. The principles of GPR are similar to reflection seismology except that electromagnetic energy is used instead of acoustic energy. This means that reflections appear at boundaries with different dielectric constants, as opposed to acoustic impedances.
The depth range of GPR is limited by the electrical conductivity of the ground, the radiated power, and the transmitted center frequency. As conductivity increases, the penetration depth decreases. This is because electromagnetic energy is more quickly dissipated into heat, causing a loss in signal strength at depth.
Higher frequencies do not penetrate as far as lower frequencies; however, they provide better resolution. Optimal depth penetration is achieved in ice, where the depth of penetration can reach several hundred meters. Good penetration is also achieved in dry sandy soils or massive dry materials, such as granite, concrete, and limestone, where the depth of penetration can reach 15 meters. In moist and/or clay-laden soils and soils with high electrical conductivity, penetration is sometimes only a few centimeters.
The depth range of GPR is limited by the electrical conductivity of the ground, the radiated power, and the transmitted center frequency. As conductivity increases, the penetration depth decreases. This is because electromagnetic energy is more quickly dissipated into heat, causing a loss in signal strength at depth.
Higher frequencies do not penetrate as far as lower frequencies; however, they provide better resolution. Optimal depth penetration is achieved in ice, where the depth of penetration can reach several hundred meters. Good penetration is also achieved in dry sandy soils or massive dry materials, such as granite, concrete, and limestone, where the depth of penetration can reach 15 meters. In moist and/or clay-laden soils and soils with high electrical conductivity, penetration is sometimes only a few centimeters.
Contact
Service AreaNationwide & Worldwide
Phone(844) 300-6GPR (6477)Cleveland, OH: (440) 893-0642Knoxville, TN: (865) 444-4295Phoenix, AZ: (480) 582-0197Houston, TX: (713) 489-9875Belfast (UK): +44 28 9568 0039Bahrain: +973-16199377Bogota (CO): +57 1 381-9475
Phone(844) 300-6GPR (6477)Cleveland, OH: (440) 893-0642Knoxville, TN: (865) 444-4295Phoenix, AZ: (480) 582-0197Houston, TX: (713) 489-9875Belfast (UK): +44 28 9568 0039Bahrain: +973-16199377Bogota (CO): +57 1 381-9475
