EARTH PRESSURE ON TUNNEL LINING CAUSED BY STRESS RELAXATION OF COHESIVE GROUND

IT OFTEN HAPPENS THAT EARTH PRESSURE ON A TUNNEL LINING BUILT IN COHESIVE GROUND INCREASES WITH TIME. ONE OF MAIN CAUSES OF THIS PHENOMENON IS BELIEVED TO BE THE STRESS RELAXATION OF THE COHESIVE GROUND AROUND THE TUNNEL. A CHARACTERISTIC EQUATION FOR THE EARTH PRESSURE CAUSED BY SUCH STRESS RELAXATION HAS BEEN DERIVED FROM THE RHEOLOGICAL PROPERTIES OF COHESIVE SOIL IN THE VISCO-ELASTIC STATE. IN ORDER TO VERIFY THIS THEORETICAL EQUATION OF EARTH PRESSURE, THE RESULTS OBTAINED FROM IT ARE COMPARED WITH THOSE OF EXPERIMENTS CARRIED OUT BY USING A MODEL TUNNEL DRIVEN INTO COHESIVE SOIL. RESULTS SHOW THAT EARTH PRESSURE ON THE TUNNEL LINING DUE TO STRESS RELAXATION OF THE GROUND INCREASES IN PROPORTION TO THE LOGARITHM OF TIME AND REACHES A CERTAIN FINITE INTENSITY ASYMPTOTICALLY AFTER A LONG TIME. THIS FINITE INTENSITY OF EARTH PRESSURE AFTER A LONG TIME CAN BE ESTIMATED FROM THE THEORETICAL EQUATION. /RRL/

  • Supplemental Notes:
    • Vol 19, P 61, 1 FIG
  • Authors:
    • Murayama, S
    • Matsuoka, H
  • Publication Date: 1970-8

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Filing Info

  • Accession Number: 00235208
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Feb 15 1972 12:00AM