GEOTECHNICAL MAPPING OF SOILS AND SEDIMENTARY ROCK FOR ENGINEERING PURPOSES WITH EXAMPLES OF PRACTICE FROM THE MANGLA DAM PROJECT

AN OUTLINE OF GEOLOGICAL MAPPING TECHNIQUES IS GIVEN, TOGETHER WITH AN INDICATION OF SOME CURRENT MAP INTERPRETATION METHODS FOR ENGINEERING PURPOSES. GEOLOGICAL MAPS WHICH ARE PREPARED SPECIFICALLY FOR ENGINEERING PURPOSES ARE VIRTUALLY UNKNOWN AMONG BRITISH PUBLICATIONS AND EXAMPLES ARE TAKEN TO SHOW SOME RECENT DEVELOPMENTS IN ENGINEERING GEOLOGY MAPPING TECHNIQUES. ENGINEERING GEOLOGY MAPS CAN BE MADE ON TWO SCALES: SMALL FOR REGIONAL STUDIES AND LARGE FOR INDIVIDUAL SITES AND PROJECTS. THE LATTER ARE TERMED 'GEOTECHNICAL' MAPS. GEOTECHNICAL MAPPING AND ITS ATTENDANT SAMPLING AND SUB-SURFACE AIDS, E.G. PITTING AND BORING, ARE PRESENTED FOR TWO CLEARLY DEFINED CONDITIONS, NAMELY BEFORE AND DURING CONSTRUCTION WORK. PRE-CONSTRUCTION MAPPING IS CARRIED OUT IN THE SITE INVESTIGATION STAGE AND ITS AIM IS TO PRODUCE A MAP ON WHICH FEATURES OF ENGINEERING SIGNIFICANCE ARE SHOWN, TOGETHER WITH AN INDICATION OF THE EXPECTED ENGINEERING BEHAVIOR AND ENGINEERING CLASSIFICATION OF THE GROUND. MAPPING DURING CONSTRUCTION IS CARRIED OUT DURING THE EXCAVATION OF THE FOUNDATIONS. ITS AIM IS TO PRODUCE AN 'AS BUILT' MAP OF THE FOUNDATION STRUCTURES AND EVEN, FOR OTHER PURPOSES SUCH AS CLAIMS OR DESIGN CHANGES, TO ENABLE COMPARISON TO BE MADE OF THE PREDICTED CONDITIONS AND THE 'AS FOUND' CONDITIONS, AND TO ASSESS PERFORMANCE, SUCH AS LEAKAGE THROUGH DAM FOUNDATIONS. GEOTECHNICAL MAPPING MUST BE ACCOMPANIED BY A PLANNED SAMPLING AND TESTING PROGRAM TO GIVE NUMBERICAL DATA AS PART OF THE GEOTECHNICAL OBSERVATIONS. /A/RRL/

  • Availability:
  • Supplemental Notes:
    • Vol 19, No 1, PP 52-74, 7 FIG, 1 TAB, 5 PHOT, 33 REF
  • Corporate Authors:

    Road Research Laboratory /UK

    ,    
  • Authors:
    • FOOKES, P G
  • Publication Date: 0

Media Info

  • Serial:
    • GEOTECHNIQUE
    • Volume: 4
    • Issue Number: 3
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00229323
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Apr 9 1971 12:00AM