HIGHWAY SHOULDERS AS RELATED TO THE PUMPING PROBLEM

PUMPING OF RIGID PAVEMENTS CANNOT OCCUR UNLESS THERE IS WATER UNDER THE PAVEMENT. EARLY STUDIES SHOW THAT PUMPING CAN BE PREVENTED BY USING GRANULAR SUBBASES. AS AXLE LOADS AND FREQUENCIES INCREASED AN ACTION SIMILAR TO PUMPING CAN DEVELOP ON SOME DENSE GRADED GRANULAR SUBBASES. INVESTIGATIONS IN INDIANA SHOW THAT MOST OF THE WATER THAT MAKES EITHER PUMPING OR EROSION POSSIBLE ORIGINATES ON THE SURFACE OF THE PAVEMENT, OR, ON POORLY DRAINED SHOULDER AREAS. THE VALUE OF SHOULDER TREATMENT AND THE IMPORTANCE OF GOOD SHOULDER MAINTENANCE IS EMPHASIZED TO PREVENT PUMPING. GOOD SHOULDERS, WELL MAINTAINED, MAKE A SUBSTANTIAL CONTRIBUTION TOWARD CONTROLLING PUMPING OF FINE-GRAINED SOIL SUBGRADES OR BLOWING OF GRANULAR SUBBASES.

Media Info

  • Monograph Title: Symposium on Highway Shoulders
  • Serial:
    • Issue Number: 151

Subject/Index Terms

Filing Info

  • Accession Number: 00203410
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 7 1994 12:00AM