TWO-DAY CONFERENCE ON EXPLORATORY BORING AND CORE SAMPLING

AFTER EXPLAINING THE REASONS FOR THE ORGANIZATION OF THIS CONFERENCE AND THE OBJECTIVES AIMED AT, THE AUTHOR COMMENTS ON THE DIFFERENT EXPERIMENTS INVOLVED. FIRST, SOME SOIL AUGERS WERE PRESENTED ON A FOREST SITE. THE BORINGS HAD TO BE MADE IN SILICEOUS CLAY. THE RESULTS OF THE DEMONSTRATION ARE GIVEN IN TWO TABLES AND A COMPARISON IS MADE BETWEEN THE DIFFERENT TECHNIQUES, ON THE ONE HAND BETWEEN SLOW SPEEDS AND HIGH SPEEDS, AND ON THE OTHER HAND BETWEEN LARGE- DIAMETER SINGLE-SPIRAL AUGERS AND SMALL-DIAMETER CONTINUOUS AUGERS. THEN CAME A PRESENTATION OF MACHINERY MAINLY DESIGNED FOR RECONNAISSANCE AND EXPLORATION IN SUBMERGED NON-COHESIVE ALLUVIAL FORMATIONS. THE AUTHOR CONSIDERS THAT STUDY OF THE SUBJECT SHOULD MAKE IT POSSIBLE TO REDUCE THE DRAWBACKS NOTED IN RESPECT OF THE BENOTO DRILLING RIG, WHICH IS PERFECTLY SUITED TO SUBMERGED ALLUVIAL SOIL. THE DEMONSTRATION OF THE P.T.C. VIBRATORY DRIVER DID NOT BRING OUT THE POTENTIALITIES OF THIS MACHINE, WHICH OPERATES PERCUSSIVELY WHEN THE RESISTANCE OF THE SOIL IS HIGH, AND BY VIBRATION WHEN THE RESISTANCE DROPS. THE MENARD ROTARY VIBRATORY DRIVER IS A LIGHTWEIGHT MACHINE WHICH, BY VIBRO- PERCUSSION, ENABLES A TUBE COLUMN TO BE LOWERED AND RAISED AND CORE SAMPLES TO BE TAKEN BY ROTATION. SOME MOBILE DRILLING RIGS, SUCH AS THE MOBILE DRILLING MINUTEMAN AND THE S.L.R., WERE ALSO PRESENTED, ALONG WITH TWO CORE BORERS, ONE OF THE SCREW TYPE, THE OTHER OF THE PRESSURE TYPE, WHICH CAN PROVIDE SAMPLES FOR C.B.R. TESTS. TWO STATIC PENETROMETERS, THE FRENCH PAREZ AND THE DUTCH GOUDA, WERE COMPARED. ESPECIALLY NOTEWORTHY WAS THE INKING SYSTEM OF THE LATTER. THE SECOND PART OF THE ARTICLE IS DEVOTED TO ROADBUILDING CORE BORERS. THE RESULTS OF TESTS CARRIED OUT ON BITUMINOUS MIX, CONCRETE AND GRAVEL-CEMENT TRACKS, AND IN A CONCRETE WALL, ARE GIVEN IN A GENERAL TABLE, SOME CRITICISM AND SUGGESTIONS ARE ALSO FORMULATED. IT APPEARS IN PARTICULAR THAT ROAD-MAKING CORE BORINGS MAY NECESSITATE AT LEAST TWO TYPES OF VARIOUS CORE BORERS IN A LIMITED RANGE OF DIAMETERS. /AUTHOR/

  • Supplemental Notes:
    • No 24, pp 4-1-4-8, 2 TAB, 10 PHOT
  • Authors:
    • Varneville, E
  • Publication Date: 0

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  • Accession Number: 00228984
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:37AM