CLOSURE ON STABILITY PROBLEMS OF COLLAPSING SOIL

THE DISCUSSION BY BALLEY, ANTONESCU, AND PERLEA, IS ACKNOWLEDGED. IT IS POINTED OUT THAT THESE SOILS ARE NOT LOESSIAL BUT OF MUDFLOW ORIGIN. ALTHOUGH THERE IS SIMILARITY OF LARGE VOID SPACE SUSCEPTIBLE TO COLLAPSE, NATURAL DENSITIES OF LOESSIAL SOILS ARE SUCH THAT THE VOIDS ARE USUALLY MORE UNIFORMITY DISPERSED THAN THOSE OF MUDFLOW ORIGIN. MUDFLOW DEPOSITS CHANGE SOIL TYPE AND HAVE A WIDE DENSITY RANGE IN SHORT DEPTH INTERVALS DEPENDING ON THE WETTING HISTORY. MUDFLOW DEPOSITS ARE BELIEVED TO BE MORE SUSCEPTIBLE TO SETTLEMENT THAN LOESS. PERFORMANCE DATA FOR THE TEST POND ARE DISCUSSED. DISCUSSORS MENTION THAT LAB SPECIMENS WILL REACH THE SAME FINAL DENSITY WHETHER SPECIMENS ARE WETTED BEFORE OR AFTER LOADING. HOWEVER, IT IS STATED THAT THIS DOES MEAN THAT THE HUGE PROTOTYPE WILL REACT THE SAME WAY BECAUSE OF THE SPATIAL EFFECTS. RESULTS ON THE COLLAPSING PHENOMENA OF LOESS ARE DESCRIBED. SETTLEMENTS WERE RECORDED AND PRESENTED FOR THE ENTIRE 16 MILES OF PONDED CANAL ROUTE. THE WRITERS FEEL THAT THESE MEASURES WERE RATHER EXTENSIVE AND SHOW THE GENERAL TREND OF SUBSIDENCE AS WELL AS LOCAL IRREGULARITITES OF SOIL CONDITIONS. THOROUGH WETTING WAS ACCOMPLISHED AND IRREGULARITIES ARE DUE TO CHANGES IN SOIL CONDITIONS MAKING PREWETTING AND LATER LOADING MORE DESIRABLE THAN PRELOADING. REFERENCES: STABILITY PROBLEMS OF COLLAPSING SOIL, H. J. GIBBS, J. P. BARA, JOURNAL OF THE SOIL MECHANICS AND FOUNDATIONS DIVISION, PROCEEDINGS OF THE AMERICAN SOCIETY OF CIVIL ENGINEERS, PROCEEDINGS PAPER 5331, JULY 1967.

  • Supplemental Notes:
    • Vol 94, Sm 6, PP 1378-1379, 1 REF, APP
  • Corporate Authors:

    N/A

    ,   USA 
  • Authors:
    • Gibbs, H J
    • Bara, J P
  • Publication Date: 0

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  • Accession Number: 00232599
  • Record Type: Publication
  • Report/Paper Numbers: No SM5, Proc Paper 490
  • Files: TRIS
  • Created Date: Aug 15 2004 2:44AM