STUDY OF THE ELECTRIC-ANALOG EXPERIMENT FOR SEEPAGE FLOW /IN JAPANESE/

AMONG THE EXPERIMENTAL METHODS FOR SOLVING THE MECHANISM OF STEADY SEEPAGE FLOW THROUGH SOIL, THE ELECTRIC-ANALOG EXPERIMENT USING AGARAGAR AS THE MEDIUM IS STUDIED. THIS ANALOG IS BASED ON THE PRINCIPLE THAT THERE EXISTS A SIMILARITY BETWEEN DARCYS LAW AND OHMS LAW. THE MERIT OF USING AGARAGAR CONSISTS IN THE FACT THAT ONE OBTAINS THE ARBITRARY PERMEABILITY OF MODEL STRATA BY CHANGING THE SALT CONTENT AND THAT ONE CAN APPLY THIS METHOD TO THREE DIMMENSIONAL SEEPAGE PROBLEMS. THE REAL DISCHARGE OF SEEPAGE FLOW CAN BE CALCULATED BY CONSIDERING THE LAW OF SIMILARITY BETWEET THE MODEL AND THE PROTOTYPE. VELOCITY POTENTIALS OF SEEPAGE FLOW AT ANY POINT IN REAL GROUND ARE OBTAINED BY MEASURING THE ELECTRIC POTENTIAL IN MODEL GROUND. TWO KINDS OF APPLICATION OF THIS EXPERIMENTAL METHOD TO THE ACTUAL DESIGN OF STRUCTURES ARE DESCRIBED, ONE IS THE LEAKAGE PROBLEM TOWARD THE BOTTOM SLAB OF A DRY ROCK (340M X 56M). THE GROUND OF THE DOCK SITE CONSISTS OF IMPERMEABLE CLAY, SILT, PERMEABLE SAND AND GRAVEL, FORMING VERY COMPLICATED STRATA. THE MODEL GROUND WAS CONSTRUCTED FROM MORE THAN TWENTY PLANES, OF WHICH THE DEPTH AND INCLINATION ARE DIFFERENT FROM EACH OTHER. THE AMOUNT OF LEAKAGE OBTAINED BY THE MODEL EXPERIMENT WAS 13.8 CUBIC M/HR, WHICH SHOWED CONSIDERABLE ACCORDANCE WITH THE ACTUAL ONE MEASURED AT THE SITE AFTER COMPLETION OF THE STRUCTURE. ANOTHER APPLICATION IS IN RESPECT TO THE INSTALLATION DESIGN OF DEEP WELLS FOR DECREASING THE GROUND-WATER PRESSURE (MAX. 4KG/ SQUARE CM) AROUND A CAISSON FOUNDATION (2.3M X 12M). THIS PROBLEM WAS ALSO SOLVED THREE-DIMENSIONALLY, DETERMINING THE LOCATION, NUMBER OF WELLS AND THE AMOUNT OF DISCHARGE. /RRL/A/

  • Corporate Authors:

    Soil Engineering Symp Proc /Japan

    /Thirteenth
    ,   USA 
  • Authors:
    • AKAI, K
    • Fukuzumi, R
    • NAITO, K
    • Nishibayashi, K
  • Publication Date: 1968-11

Subject/Index Terms

Filing Info

  • Accession Number: 00229378
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Report/Paper Numbers: pp 31-36
  • Files: TRIS
  • Created Date: Oct 19 1970 12:00AM