West India Consultancy Services
Surveying & Designing Solutions
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Welcome to
West India Consultancy Services
Welcome to
West India Consultancy Services
Welcome to
West India Consultancy Services
Geotechnical Investigation
Introduction:-
Today, the advance space technology almost reached on extraterrestrial (Mars) planet and deep ocean exploration also possible to human using submarine technologies like sonar, scuba diving etc.
But sill today human have no proper answer what are actually below us? Using direct investigation like bore wells and mining's can provide information regarding to underground objects with some depth limitations. But using electromagnetic waves we can get some 100s of meter information regarding underground objects.
Ground Penetrating Radar (GPR) is one of those techniques which used radar waves to exploration of underground surface. It can be helpful to many mapping application with some extent of depth.
Ground penetrating radar (GPR)
survey report introduction can include the following:
Scope of work
This is the most important part of the introduction and should include what the survey was contracted to do.
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Background
A description of the GPR method and how it works can be included.
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Purpose
The purpose of the survey, such as evaluating the location of buried objects or investigating subsurface conditions.
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Methodology
A description of the equipment used, such as the antenna, signal digitizer, and display.
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Limitations
GPR surveys are typically limited to depths of about 10 meters, but can reach depths of hundreds of meters in some materials.GPR results are also non-unique and should be compared with other data.
Ground penetrating radar can detect
Ground Penetrating Radar (GPR) can effectively locate and distinguish a wide variety of metallic and non-metallic materials. GPR works best when there is a big difference in the electromagnetic properties of the materials being surveyed. For this reason, metallic objects make ideal targets (e.g. reinforcement in concrete). Ground Penetrating Radar will detect most materials, providing there is a sufficient difference in the electromagnetic properties between the target and surrounding material. Some of the more common target materials include:
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Metal
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Plastics
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Changes in ground strata and geological features
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Concrete Air pockets or voids
Excavated areas, back-filled areas, and other ground disturbances can also be identified and mapped.
Ground Penetrating Radar will not work in certain ground conditions, such as heavy clay soils, particularly if they are waterlogged. De-ionised water does not pose a problem to GPR. However, water with a high mineral content (e.g. seawater) attenuates the signal making it an unsuitable medium. Ground Penetrating Radar can also not penetrate through metallic objects, including very dense reinforcement.
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