What You Should Know About Sub-surface Surveying With Ground Penetrating Radar

WHAT YOU SHOULD KNOW ABOUT SUB-SURFACE

SURVEYINGWITH GROUND PENETRATING RADAR

Ground Penetrating Radar (GPR) is something

that companies use in order to locate buried

objects and detect their precise location at the

fastest time possible. There are a lot of uses for

ground penetrating radar; however, it’s mostly

used for cables, and pipes.

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GPR can be utilized on different surfaces,

including the ground, stone, ice, fresh water,

sidewalks and construction sites. It can find lost

items, track changes in the substance of the

subsurface, and detect voids and cracks. More info on:



GPR uses high frequency

(normally polarized) radio

waves that blasts to the

bottom. When the waves hit

the border of a buried object

or an anomalous surface, the

receiving antenna records

the variations.

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While the technology for ground penetrating radar

is accurate, it’s not without its limitation. The

electric conductivity of the earth, the transmitted

center frequency as well as the radiated power

limits the depth range. As conductivity rises, the

penetration depth falls.

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The maximum depth

penetration for ice is several

meters. Also, great

penetration is possible in

dry sandy soils or

substantial dry substances

like concrete, limestone, and

granite where the depth

could be up to 15 meters or

49 feet.

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Ground-penetrating radar

antennas are usually used for

the most powerful signal

strength; yet, GPR

atmosphere-launched

antennas are also used. Aside

from locating objects, GPR is

also used in the Earth

sciences. It can be used to

analyze groundwater, soils,

bedrock, and ice.

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It also has engineering uses,

including nondestructive

testing of pavements and

structures, finding buried

utility lines and structures,

and analyzing bedrock and

soils. It can also be used for

finding underground graves.

The military uses the

technology in order to detect

unexploded mines, and

tunnels.

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In mining, borehole radars

using GPR are employed

to plan the arrangements

from a borehole in

underground mining.

Modern directional

borehole radar systems can

generate three dimensional

pictures from

measurements within a

borehole.

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GPR can also create 3D subterranean pictures of

power conduits, sewage and water mains. This

technology is usually called PAT, or Pipe Avoiding

Tool. In archaeology, is used to discover and map

subsurface archaeological artifacts, and patterning.

GPR can reveal a crypt the in a historical

graveyard.

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As we said before, GPR is not without its limits.

It’s highly limited in capability when used in clay

soils and similar surfaces. Another disadvantage of

GPR is that it consumes a lot of energy. But these

disadvantages do not discount the fact that GPR is

highly useful in other situation.

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What You Should Know About Sub-surface Surveying With Ground Penetrating Radar