Aplicación de técnicas de Geo-radar a los muros biológicos de hormigón armado en el interior de una central nuclear.

• Canas, J.A. ^[1] ; Pujades, L.G. ^[1] ; García, F. ^[2] ; Ugalde, A. ^[1] ; Clapés, J. ^[1] ; Osorio, R. ^[1] ; Pérez, V. ^[1] ; Casellas, O. ^[1]
  1. [1] Universitat Politècnica de Catalunya

     Universitat Politècnica de Catalunya

     Barcelona, España

     
  2. [2] Universidad Politécnica de Valencia

     Universidad Politécnica de Valencia

     Valencia, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 4, 1996 (Ejemplar dedicado a: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996), págs. 970-973
• Idioma: español
• Títulos paralelos:
  • Georadar applications on concrete reinforced walls into a nuclear power plant
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• Resumen

  • Accurate identification of frames into concrete reinforced walls in a nuclear power plant was required because of maintenance labours. Several cuts in the concrete, including the frame, were planned. The cutting fines were designed to avoid as much as possible the frame bars. To perfom this work the ground penetrating radar has been used. The use of ground prenetrating radar techniques allow to determine the vertical and horizontal position of the frame bars. GPR detects also other reflectors into the walls. The electric properties contrast between the concrete and the steel of the frame gives reflections clearly detected in the records. This near surface study requires lo use high resolution antennas with a very high center frecuency. The measurement precission required in the work was obtained using a special marker to carry the anlenna, specially design far this job. The marker allows to know the position of the antenna on the wall with a precission of centimeters. The measurements were acquired from one antenna with a center frecuency of 1000 MHz, with a SIR 10 system of Geophysical Survey Sistems Inc.. An experimental test made in a scale model help to the interpretation of the records. A later and careful treatment in laboratory, using all the records obtained in the nuclear power plant, applying vertical lowpass and highpass filters and horizontal lowpass filter was perfomed, to place correctly the bars into the concrete.