Minnesota GPR Project 1998: testing ground penetrating radar technology on Minnesota roads and highways

Timo Saarenketo; David van Deusen; Pekka Maijala

doi:10.1117/12.383601

27 April 2000 Minnesota GPR Project 1998: testing ground penetrating radar technology on Minnesota roads and highways

Timo Saarenketo, David van Deusen, Pekka Maijala

Proceedings Volume 4084, Eighth International Conference on Ground Penetrating Radar; (2000) https://doi.org/10.1117/12.383601
Event: 8th International Conference on Ground Penetrating Radar, 2000, Gold Coast, Australia

Abstract

During May 1998, Roadscanners Oy together with the Office of Minnesota Road Research performed a series of GPR tests in Minnesota, in order to determine the level of accuracy of the GPR technology in pavement and subgrade soil testing. The project involved a total of 195 km of GPR surveys carried out in different locations throughout Minnesota. The test sections represented a range of pavement materials, structures and soils found in the state. A number of GPR tests were performed to evaluate different types of pavement defect and ascertain their causes. The results of the Minnesota GPR Project 1998 clearly show the potential benefits that GPR techniques could offer the Minnesota Department of Transportation (DOT). The results of the Mn/ROAD tests show that GPR can be applied in measuring the layer thickness of various pavement structures. The surface reflection technique can be used to determine the signal velocity of both asphalt and concrete pavement structures. Mn/ROAD surveys also revealed evidence of some previously unknown defects in test cells, e.g. stripping, voids and moisture anomalies. A good example of the benefits the GPR technique can offer in detecting stripping is the T.H. 23, T.H. 71 Willmar case, where reference data, drill cores and FWD data matched almost perfectly with the GPR data. Another notable case presented in the paper is U.S. 52, Oronoco, where defects due to differential frost heave were located.

Citation Download Citation

Timo Saarenketo, David van Deusen, and Pekka Maijala "Minnesota GPR Project 1998: testing ground penetrating radar technology on Minnesota roads and highways", Proc. SPIE 4084, Eighth International Conference on Ground Penetrating Radar, (27 April 2000); https://doi.org/10.1117/12.383601

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