SETTLEMENT BEHIND BRIDGE ABUTMENTS; THE PERFORMANCE OF A UNIFORMLY-GRADED SAND FILL IN AN APPROACH EMBANKMENT ON THE M4 MOTORWAY

A UNIFORMLY-GRADED FINE-TO-MEDIUM SAND WAS EXAMINED AND COMPARED WITH A WELL-GRADED SANDY GRAVEL. MEASUREMENTS WERE MADE OF THE STATE OF COMPACTION OF THE FILL MATERIALS AND RECORDS OBTAINED OF THE SETTLEMENTS OF THE ROAD SURFACE AND THE SUBSOIL. AFTER FOUR YEARS THE SETTLEMENTS WITHIN BOTH THE 7 METER HIGH SAND AND GRAVEL FILLS WERE NEGLIGIBLE. HOWEVER SETTLEMENTS OF UP TO 40MM WERE RECORDED IN THE SUBSOIL BENEATH THE FILL MATERIALS DUE TO CONSOLIDATION OF THE UNDERLYING CLAY. THIS HAD LED TO THE OCCURRENCE OF SMALL DIFFERENTIAL SETTLEMENTS OF UP TO 26 MM SPREAD OVER A MINIMUM LENGTH OF 17 METERS. THESE DIFFERENTIAL SETTLEMENTS ARE SO SMALL THAT THE RIDING QUALITY OF THE ROAD HAS NOT BEEN AFFECTED. THE INVESTIGATION SHOWED THAT THE UNIFORMLY- GRADED FINE-TO-MEDIUM SAND PERFORMED AS WELL AS THE WELL- GRADED SANDY GRAVEL AND, WHEN WELL COMPACTED, CAN BE USED AS A SATISFACTORY FILL MATERIAL BEHIND BRIDGE ABUTMENTS. /AUTHOR/

  • Supplemental Notes:
    • Rrl Rept Lr 310, 7 PP, 9 FIGS
  • Corporate Authors:

    Road Research Laboratory /UK

    ,    
  • Authors:
    • Cross, J E
  • Publication Date: 1970

Subject/Index Terms

Filing Info

  • Accession Number: 00232994
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 26 1971 12:00AM