CALIFORNIA EXPERIENCE IN STABILIZING EARTH SLOPES THROUGH THE INSTALLATION OF HORIZONTAL DRAINS BY THE HYDRAUGER METHOD

AN ECONOMICAL AND EFFECTIVE METHOD OF STABILIZING LANDSLIDES THROUGH SUB-DRAINAGE WAS DEVELOPED BY THE CALIFORNIA DIVISION OF HIGHWAYS. SUCH CONDITIONS WERE CORRECTED THROUGH THE INSTALLATION OF PERFORATED METAL PIPE DRAINS IN HORIZONTAL OR SLIGHTLY INCLINED HOLES. EIGHT YEARS' EXPERIENCE WITH THIS METHOD HAS DEVELOPED A GENERAL PROCEDURE WHICH IS PRESENTED. EXPERIENCE HAS SHOWN THAT A PROCEDURE, UTILIZING VERTICAL SAND DRAINS IN CONJUNCTION WITH THE HORIZONTAL DRAINS, IS VERY EFFECTIVE FOR DRAINING HIGHLY STRATIFIED AREAS COMPOSED OF FLAT LYING SEDIMENTARY DEPOSITS INTERBEDDED WITH PLASTIC CLAY. THE VERTICAL DRAINS PERFORATE THE IMPERMEABLE CLAY LAYERS, RELEASING GROUNDWATER FROM THE UPPER PORTIONS OF THE MASS TO THE HORIZONTAL DRAINS. THE HORIZONTAL DRAINAGE TREATMENT OF SLIDES AND SLIPOUTS BY THE HYDRAUGER METHOD IS CONDUCTED BY A TRAVELING DRILL CREW ASSISTED BY MEN FROM LOCAL STATIONS. THE FIRST OPERATION CONSISTS OF CLEARING OR BENCHING TO ACCOMMODATE THE DRILL EQUIPMENT AT THE TENTATIVE LOCATIONS PROPOSED AS OUTLETS FOR THE DRAINS, AND ESTABLISHING WATER AND COMPRESSED AIR SUPPLY TO THE HYDRAUGER UNITS WHICH UTILIZE AIR MOTORS FOR POWER AND WATER FOR WASHING THE HOLE AND COOLING THE BIT. DRILLING AN INSTALLATION IS DESCRIBED.

  • Supplemental Notes:
    • Vol 3, pp 256-260, 8 FIG
  • Corporate Authors:

    Butterworth & Company Ltd, London /UK

    /4th Conf
    ,   USA 

    N/A

    ,   USA 

    Western Australia University, Australia

    Nedlands, Western Australia,   Australia 

    National Belgian Roads Congress

    ,    

    Pca Foreign Literature Study

    ,    
  • Authors:
    • STANTON, T E
  • Conference:
  • Publication Date: 0

Media Info

  • Serial:
    • Volume: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00231415
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:41AM