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        Pre-construction studies using GPR

        • Optimization of geological drilling:
          When reconstructing roads, it is important to get as comprehensive an overview of the layers and subsoils of the reconstructed road as possible. The traditional method, based only on boreholes, makes it possible to accurately determine the layers and their properties, but the major drawback of the method is the slowness of the work, the nature of obstructing traffic and breaking roads, and the cost, which is why it is not reasonable in practice to carry out geological drilling more frequently than in 50m (exceptionally smaller) increments. The ground radar allows measurements to be made as a continuous profile and thus to identify similar e. homogeneous sections. Depending on the actual situation, they can be of very different lengths, but generally one geological drilling is sufficient to reliably describe each homogeneous section. Based on the radar profiles, the optimal number of boreholes is planned for the road and, if necessary, other measurements (e.g. bearing capacity) that allow the interpretation of the radar profile data with sufficient detail and the determination of the road cross-section.
        • Determination of cover and soil layer thicknesses:
          Thanks to the continuity of the measurement, the use of the combined method (ground radar + boreholes) makes it possible to obtain a significantly higher quality geological data set about the road compared to the traditionally used survey based only on boreholes, and also to determine the thicknesses of the layers continuously (typically every meter).
        • Mapping of underground utility networks:
          Ground radar measurements are made as 3D measurements to search and localize underground objects e. with a survey network or 3D ground radar formed by measuring tracks located parallel or intersecting. By measuring in this way, it is possible to outline the object you are looking for or to discover objects that may be of interest (pipes, cable sets, culverts, collectors, etc.), and when processing the data, the orienting outlines of the object can be applied to the plan.
        • Archaeological studies:
          In old inhabited areas, during construction and reconstruction, it is often necessary to specify existing archaeological data, e.g. the location of objects (e.g. foundation walls) on the road route on old maps.

        Romet Raun

        Head of department

        Mob: +(372) 5335 8643

        romet.raun@teed.ee Get in touch