WORKING OF GPR (GROUND PENETRATING RADAR) EQUIPMENT AND ITS USES IN CONSTRUCTION

Construction of a building begins below ground level – because that is where foundations are made. Foundations support the load of the entire building, and that is why every measure is taken to make sure that they are constructed right. Take piles, for example – once they are cast, there is no way of knowing if everything went alright. Earlier, in order to check if piles were casted right, they used to be pulled out – which defeated the whole purpose. These days, Ground Penetrating Radar is used to check consistency and homogeneity of anything that is underground in the construction industry.

Principle of GPR
GPR makes use of a high frequency radio signal. When you place the device on top of the structural element you want to examine, the device emits a radio signal which travels through the structure, and returns to the device. It works exactly like a radar or sonar – if there are any anomalies in the homogeneity of the structure, the behavior of the radio signal will show up on the monitor as changed or different. In this way, one can find out easily if the integrity of a structure has been compromised, without having to blast it away into oblivion.

Uses of GPR
Not just in the construction industry, there are many other uses of GPR across many other works as well.
  • ·        GPR finds applications in the field of earth sciences in explorations below the ground, such as study of bedrock, soils or groundwater.
  • ·  In engineering, GPR is used for non-destructive testing as discussed, for environment remediation and for mapping archaeological features.
  • ·         GPR also finds applications in military to detect unexploded ordnances.


GPR makes possible many underground studies, which is why it is extensively used in the construction field.

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