AN EXPERIMENTAL STUDY OF REDUCING SCOUR AROUND BRIDGE PIERS USING PILES

THE REPORT PRESENTS THE RESULTS OF PLACING ROUND PILING UPSTREAM FROM BRIDGE PIERS IN AN EFFORT TO REDUCE SCOUR. LABORATORY MODELS AND A FIELD PROTOTYPE WERE USED. IN THE LABORATORY, THE CONDITIONS WERE VARIED AS TO THE NUMBER AND PLACEMENT OF PILING, THE SHAPE OF PIERS, AND THE ANGLE AND AMOUNT OF FLOW. THE DEPTH OF SCOUR WAS MEASURED UNDER THE VARIED FLOW CONDITIONS WITH AND WITHOUT THE CLUSTERS OF PILING IN PLACE. THERE WAS A SIGNIFICANT REDUCTION IN SCOUR UNDER THESE LABORATORY CONDITIONS, ESPECIALLY WHEN THE FLOW WAS DIRECTLY AT THE PIER AND THE TOPS OF THE PILING WERE SUBMERGED. THE RESULTS OF THE FIELD PROTOTYPE STUDIED WERE DISAPPOINTING, AS THERE WERE NO SIGNIFICANT FLOWS DURING THE TWO SEASONS OF STUDY. THE MEASUREMENTS TAKEN UNDER THE EXTREMELY LOW VELOCITIES AND DEPTHS ARE MEANINGLESS EVEN THOUGH THERE WAS AN INDICATION OF A REDUCTION IN SCOUR. NO DEFINITE CONCLUSIONS CAN BE MADE WITHOUT FURTHER STUDY. /FHWA/

Subject/Index Terms

Filing Info

  • Accession Number: 00204040
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Study No 640 (67)
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 27 1972 12:00AM