METHOD FOR DETERMING THE POTENTIAL VERTICAL RISE, PVR (TEXAS TEST METHOD TEX-124-E)

A PROCEDURE IS PESENTED WHICH PROVIDES A MEANS FOR THE DETERMINATION OF THE POTENTIAL VERTICAL RISE (PVR) IN A SOIL STRATA, SUCH AS MAY BE ENCOUNTERED IN THE PLACEENT OF A ROADWAY, BRIDGE, OR BUILDING FOUNDATION. A SHORT EXAMPLE IS GIVEN WHICH ILLUSTRATES HOW THE TEST METHOD WORKS. BY USING THE DETERMINATION OF PVR IN CONJUNCTION WITH THE UNIT LOADS TO BE IMPOSED BY THE STRUCTURE, THE ENGINEER CAN MAKE CHOICES ON THE METHODS OF CONSTRUCTION TO BE EMPLOYED AND THE REMEDIAL PROCEDURES TO USE IN SECURING THE GREATEST VALUE FOR HIS CONSTRUCTION MONEY. SOME OF THE CHOICES, DEPENDENT UPON THE DEPTH, AMOUNT OF SWELLING CLAYS, AND OTHER CONDITIONS ARE AS FOLLOWS: (1) REMOVAL OF NEAR THE SURFACE CLAY LAYERS AND REPLACEMENT WITH GRANULAR MATERIAL; (2) PONDING WITH WATER FOR THIRTY OR MORE DAYS TO BRING DRIER CLAYS TOWARD OPTIMUM CONDITIONS; (3) STABILIZATION OR MODIFICATION OF CLAY LAYERS NEAR THE SURFACE USUALLY USING LIME; (4) UTILIZATION OF DENSITY AND MOISTURE CONTROL METHODS AND MOISTURE PRESERVATION SUCH AS ASPHALT MEMBRANES OR WIDE GRANULAR SECTIONS, WHICH IS OF GREAT MERIT AFTER PONDING; (5) EMPLOYING IN BUILDINGS THE USE OF AMPLE STEEL IN GRADE BEAMS, TOP AND BOTTOM, OR THE USE OF HEAVY STEEL IN FOUNDATION SHAFTS AND INSULATING THEM FROM THE CLAY; AND (6) SUCH OTHER MEASURES AS LEAVING AIR SPACE UNDER GRADE BEAMS, SUSPENSION OF FLOORS FROM FOUNDATION SHAFTS OR THE USE OF EXPANSION JOINTS TO SEPARATE THE FLOOR FROM FOUNDATION GRADE BEAMS.

  • Supplemental Notes:
    • Proceedings, Workshop on Expansive Clays and Shales in Highway Design and Construction, Denver, Colorado, 1972. Available in 2 volumes from NTIS, PB-225842.
  • Corporate Authors:

    University of Wyoming, Laramie

    Wyoming Survey and Analysis Center, 710 Garfield
    Laramie, WY  United States  82070

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • SMITH, A W
  • Publication Date: 1973-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00230351
  • Record Type: Publication
  • Report/Paper Numbers: Workshop Proceedings
  • Files: TRIS, USDOT
  • Created Date: Jul 31 1974 12:00AM