Potentials of ground penetrating radar for the assessment of outer stone masonry leaves. Charles Bridge in Prague

0452935 - ÚTAM 2016 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Válek, Jan - Havlín, J. - Slavíková, M.
Potentials of ground penetrating radar for the assessment of outer stone masonry leaves. Charles Bridge in Prague.
Proceedings of 2015 3rd International Conference on Advances in Civil, Structural and Construction Engineering - CSCE. New York: Institute of Research Engineers and Doctors, 2015 - (Kumar, R.), s. 62-66. ISBN 978-1-63248-079-8.
[International Conference on Advances in Civil, Structural and Construction Engineering - CSCE 2015. Rome (IT), 20.2..10.1-20.2..11.1]
Grant CEP: GA MK(CZ) DF11P01OVV027
Klíčová slova: GPR * ground penetrating radar * masonry assessment
Kód oboru RIV: AL - Umění, architektura, kulturní dědictví
http://www.seekdl.org/conferences_page_papers.php?confid=221

Ground penetrating radar equipped with 2 GHz/nhigh frequency bi-polar antenna was experimentally used as/none of the methods for the assessment of outer stone masonry/nleaf of the Charles Bridge (14th century) in Prague. The/napplicability of the method was first studied on previously/nextracted masonry blocks. This allowed a more detailed study/nof expected defects and of various material inhomogeneities/nincluding grouting materials that were to be expected during/nthe assessment of the real structure. These model situations/nwere useful for determination of an optimal radar set up and/nalso its resolution and clarification of potentials for detection of/nexpected defects like voids, irregular detached surfaces,/nelevated moisture content and reflection of signal from the/nirregular rear plane of a stone block. It also uncovered/nimportant influences of several types of sandstones used in the/nstructure. There have been more than seven different types of/nsandstone identified in the structure. The final step was a trial/nassessment of the masonry in situ. After the evaluation, the/nGPR method was recommended for the assessment of the/nfacing stone units of the bridge.
Trvalý link: http://hdl.handle.net/11104/0253846