INFLUENCE OF CRACKING ON THE DEFORMATION PROPERTY OF ROCKS /IN RUSSIAN/

A STUDY WAS MADE OF THE INFLUENCE OF A SYSTEM OF MACRO- CRACKS ON THE DEFORMATION CHARACTERISTICS OF A ROCK MASS. TWO CASES WERE CONSIDERED: (1) THE AVERAGE LENGTH OF THE CRACK IS AT LEAST EQUAL TO THE LINEAR DIMENSION OF THE STRUCTURE (DAM, FOUNDATION, EXPERIMENTAL PLATE), AND (2) THE AVERAGE LENGTH OF THE CRACK IS CONSIDERABLY SMALLER THAN THE DIMENSION OF THE STRUCTURE. IN THE FIRST CASE, FORMULAE DERIVED FROM HOOKE'S LAW, SHOWED THE ANISOTROPY OF THE DEFORMATION DUE TO THE EXISTENCE OF A SINGLE SYSTEM OF CRACKS IN THE ROCK MASS. THIS MASS CAN BE REPRESENTED BY A STRATIFIED MEDIUM OF ISOTROPIC LAYERS. NUMERICAL EXAMPLES ARE GIVEN. IN THE SECOND CASE, IF ONLY A SLIGHT MACRO-CRACK EXISTS AND PLAYS A VERY SMALL ROLE, THE EXISTENCE OF SEVERAL SYSTEMS OF CRACKS MARKEDLY MODIFIES THE MODULI OF DEFORMATION. IN PRACTICE, IT IS NECESSARY TO OBTAIN A LARGE NUMBER OF PRESSURE MEASUREMENTS BY MEANS OF PRESSIOMETERS OR PLATES ON THE SURFACE AND WITHIN THE DEPTH OF THE ROCK MASS. INCREASING THE SURFACE OF THE PLATES OR THE DIAMETER OF THE PRESSIOMETERS DOES NOT HELP. /TRRL/

  • Authors:
    • Tarasovr IV
  • Publication Date: 1968

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Filing Info

  • Accession Number: 00235062
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: May 15 1973 12:00AM