SEISMIC LOGGING TECHNIQUE IN CIVIL ENGINEERING

LA TECHNIQUE DU CAROTTAGE SISMIQUE EN GENIE CIVIL

The seismic methods currently used in civil engineering permit only large quantities of soil to be detected and identified, the equipment utilized stretching over several dozen meters. Seismic logging allows the identification of much smaller quantities of soil. The measuring apparatus comprises a seismic probe equipped with a wave transmission system, one or several sensors and a device which facilitates the application of the transmission head and detection head to the side of a borehole. The signals transmitted by the sensors can be seen on an oscilloscope. This article briefly describes two measurement circuits together with the main results obtained with them. The identification of longitudinal and transverse waves is discussed as well as the calculation of the modulus of elasticity and Poisson's ratio that can be derived from them. The results of measurements of the velocity of longitudinal waves in a limestone mass are compared with other characteristics measured in the same soil: natural radioactivity, velocity on samples and simple compression strength. Results show that this technique facilitates the determination of in-situ characteristics which cannot be obtained by other methods. /TRRL/

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Allard, P
    • Grenet, C
  • Publication Date: 1972-7-8

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00096689
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Files: ITRD, TRIS
  • Created Date: Aug 27 1975 12:00AM