Non-destructive testing (NDT) refers to a range of techniques used to evaluate the properties or integrity of materials or structures without causing damage. In the field of geotechnical engineering, NDT is commonly used to assess the condition of soil, rock, and other subsurface materials in a non-invasive manner.

Over the years, NDT has evolved significantly as new technologies and techniques have been developed. Here is a brief overview of the development of NDT in geotechnical engineering over the past few generations:

Overall, the evolution of NDT in geotechnical engineering has allowed for increasingly accurate and detailed assessments of subsurface materials, with a reduced impact on the environment and construction costs. As new technologies and techniques continue to be developed, it is likely that NDT will continue to play an important role in the field of geotechnical engineering for generations to come.

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