ADJUSTABLE BOX FOUNDATIONS AS A MEASURE AGAINST EXCESSIVE SETTLEMENT AND TILTING

AN ECONOMICAL SOLUTION IS DISCUSSED FOR A FOUNDATION KNOWN TO BE LIABLE TO UNDERGO EXCESSIVE SETTLEMENT AND TILTING. THE FOUNDATION SOIL CONSISTS OF A LOOSE FILL UNDERLAIN BY A SOFT AND ORGANIC CLAY LAYER WITH A CONSIDERABLE BUT VARIABLE THICKNESS, RESTING ON INCLINED BEDROCK. GEOTECHNICAL SOIL PROPERTIES HAVE BEEN DETERMINED IN THE LABORATORY AND IN THE FIELD BY MEANS OF A LARGE, FLEXIBLE, LONG-TERM TEST LOADING. AFTER ESTIMATING THE AMOUNT OF THE PROBABLE SETTLEMENTS AND TILT, THE BUILDING WAS CONSTRUCTED WITH A REVERSE INCLINATION. IN ADDITION, CONSIDERING THE UNCERTAINTIES CONNECTED WITH SETTLEMENT FORECASTS, NICHES FOR HYDRAULIC JACKS, TUBES FOR MORTAR INJECTION, AND REACTION MATS HAVE BEEN PLACED UNDER THE RIGID BOX. DURING CONSTRUCTION AND IN THE FOLLOWING MONTHS THE REVERSE INCLINATION HAS ALMOST LEVELLED OFF. IT SEEMS THAT RECOURSE TO JACKING UP WILL NOT BE NECESSARY. THE COST OF THESE PRECAUTIONARY ARRANGEMENTS IS NEGLIGIBLE, AND THE COSTS FOR A PROBABLE LEVELLING OPERATION ARE SMALL. /LCPC/RRL/C/

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Filing Info

  • Accession Number: 00234584
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Apr 12 1971 12:00AM