PREDICTION OF MOISTURE MOVEMENT IN EXPANSIVE CLAYS

TWO COMPUTER PROGRAMS ARE DESCRIBED FOR DETERMINING CHANGING MOISTURE DISTRIBUTION WITH TIME. PROGRAM FLOPIP1 IS ARRANGED TO WORK ONE-DIMENSIONAL PROBLEMS AND COMPUTER PROGRAM GCHPIP1 SOLVES MOISTURE DISTRIBUTION PROBLEMS IN TWO DIMENSIONS. THE EQUATION GOVERNING THE FLOW OF MOISTURE IS A CONCENTRATION-DEPENDENT, PARABOLIC, PARTIAL DIFFERENTIAL EQUATION WHICH IS SOLVED NUMERICALLY USING THE IMPLICIT CRANK-NICOLSON METHOD OF MARCHING FORWARD IN TIME. EXAMPLE PROBLEMS ARE WORKED TO DEMONSTRATE THE CAPABILITIES AND BREADTH OF APPLICATION OF THE COMPUTER PROGRAMS AND TO PROVE THE VALIDITY OF THE APPROACH. THE ONE-DIMENSIONAL EXAMPLE PROBLEMS ARE CONCERNED WITH MATCHING MEASURED FIELD DATA AND WITH PRESENTING THE RESULTS OF A PARAMETER STUDY OF VARIOUS SUCTION AND PERMEABILITY FACTORS. THE FIELD DATA CAN BE DUPLICATED TO WITHIN VERY CLOSE TOLERANCES. THE TWO- DIMENSIONAL EXAMPLE PROBLEMS ARE ARRANGED TO DEMONSTRATE THE VERSATILITY OF COMPUTER PROGRAM GCHPIP1. PROBLEMS SOLVED INCLUDE A TWO-DIMENSIONAL CONSOLIDATION PROBLEM, PENDING PROBLEMS, AND A PROBLEM OF PREDICTING MOISTURE DISTRIBUTION WITHIN A CONCRETE HIGHWAY BRIDGE GIRDER. /AUTHOR/

  • Supplemental Notes:
    • Hpr, 3-8-68-118
  • Corporate Authors:

    University of Texas, Austin

    Cockrell Hall
    Austin, TX  United States  78712

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Lytton, R L
    • Kher, R K
  • Publication Date: 1969-6

Subject/Index Terms

Filing Info

  • Accession Number: 00237223
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Feb 9 1970 12:00AM