FOUNDATION SETTLEMENTS IN THE FT. RANDALL DAM EMBANKMENT

AN ESTIMATE OF THE MAGNITUDE AND TIME RATE OF SETTLEMENT DUE TO COMPRESSION STRAINS IN THE FOUNDATIONS SOIL AT 12 POINTS BENEATH THE EMBANKMENT SECTION OF THE FT. RANDALL DAM HAS BEEN MADE. THESE ESTIMATES HAVE BEEN COMPARED WITH ACTUAL MEASURED SETTLEMENTS WHICH HAD OCCURRED UP TO JANUARY 1956, APPROXIMATELY A YEAR AND A HALF AFTER COMPLETION OF THE EMBANKMENT. THE COMPRESSION STRAINS WERE ESTIMATED BY MEANS OF THE TERZAGHI THEORY OF CONSOLIDATION, USING GEOLOGICAL PROFILES AND SOIL TEST DATA FURNISHED BY THE OMAHA DISTRICT, CORPS OF ENGINEERS, U. S. ARMY. THE MEASURED SETTLEMENTS WERE ALSO OBTAINED FROM THE OMAHA DISTRICT. IN GENERAL, THE ORDER OF MAGNITUDE OF THE ESTIMATED ULTIMATE SETTLEMENTS COMPARES FAVORABLY WITH THE MEASURED SETTLEMENTS UP TO THE PRESENT TIME. THE ESTIMATED RATES OF SETTLEMENT DO NOT COMPARE AS FAVORABLY WITH THE MEASURED RATES AS DO THE ULTIMATE SETTLEMENTS, DUE PRIMARILY, IT IS BELIEVED, TO THE DIFFICULTY OF ESTIMATING THE DRAINAGE CONDITIONS WITHIN AND BELOW THE ALLUVIAL SEDIMENTS WHICH COMPRISE THE FOUNDATION SOIL. THE PAPER CONTAINS A DESCRIPTION OF THE ASSUMPTIONS AND METHODS EMPLOYED IN MAKING THE SETTLEMENT ESTIMATES, TOGETHER WITH THE GEOLOGICAL AND TEST DATA AND THE MEASURED SETTLEMENTS. ALSO PRESENTED IS A COMPLETE TYPICAL CALCULATION OF STRESS DISTRIBUTION AND SETTLEMENT AT ONE POINT. /AUTHOR/

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  • English

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  • Accession Number: 00232415
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:43AM