STABILIZATION OF SETTLING AND WEAK CLAYEY SOILS BY THERMAL TREATMENT

A METHOD FOR THE THERMAL STABILIZATION OF SETTLING LOESS AND OTHER SOILS OF POROUS STRUCTURE IS PRESENTED. THIS METHOD HAS BEEN SUCCESSFULLY APPLIED IN PRACTICAL CONSTRUCTION WORK. IT INVOLVES BURNING VARIOUS FUELS IN THE SOIL BEING TREATED, A PROCESS OF COMBUSTION TAKING PLACE IN SEALED BORE HOLES WITH CONTROL OF THE TEMPERATURE AND CHEMICAL COMPOSITION OF THE COMBUSTION PRODUCTS. HEATING OF THE SOIL TO A TEMPERATURE HIGH ENOUGH TO CAUSE THE NECESSARY CHANGES IN THE SOIL CHARACTERISTICS IS ACHIEVED MAINLY BY INFILTRATION OF THE COMPRESSED HEATED AIR OR OF THE INCANDESCENT PRODUCTS OF COMBUSTION THROUGH THE PORES IN THE SOIL. BY USING THE THERMAL METHOD OF CONSOLIDATION THE SETTLING PROPERTIES OF LOESS SOILS CAN BE ENTIRELY ELIMI- NATED TO A DEPTH OF 10-15 METERS BELOW THE FOOTING BASE WHILE THE LOAD BEARING CAPACITY OF THESE SOILS IS GREATLY INCREASED. THERMAL TREATMENT OF SOILS IS RECOMMENDED TO: (1) CONSOLIDATE LOESS SOILS IN THE FOUNDATIONS OF IMPORTANT RESIDENTIAL AND INDUSTRIAL BUILDINGS, (2) ELIMINATE THE POSSIBILITY OF FAILURES OF VARIOUS EXISTING BUILDINGS AND STRUCTURES DUE TO EXCESSIVE DIFFERENTIAL SETTLEMENT, AND (3) PREVENT LANDSLIDES AND MANY OTHER CAUSES OF FAILURES. THERMAL-CHEMICAL TREATMENT OF SOILS IS ENABLED BY MEANS OF THE HOT GASEOUS PRODUCTS OF COMBUSTION TO WHICH SPECIAL CHEMICALS ARE ADDED, IF NECESSARY. THE USE OF GASEOUS FUEL IS EFFECTIVE FOR MORE EVEN HEATING AND TEMPERATURE CONTROL IN THE BORE HOLE. THE HEAT TRANSFER FROM THE HOT GASES IN THE BORE HOLE TO THE SOIL MASS IS ACHIEVED BY: FILTRATION OF THE AIR AND INCANDESCENT GASEOUS PRODUCTS OF COMBUSTION THROUGH THE PORES OF THE SOIL TO BE CONSOLIDATED, AND BY DIRECT TRANSMISSION OF HEAT DUE TO TEMPERATURE DIFFERENCE AND THE CONTACT BETWEEN THE HEAT SOURCE AND THE SURFACE OF THE SOIL. SETTLING LOESS SOILS WHEN SUBJECTED TO THERMAL TREATMENT CHANGE THEIR PHYSICO-MECHANICAL PROPERTIES BY: (1)ABILITY TO SETTLE AND TO BE WETTED ARE ENTIRELY ELIMINATED, (2)COHESION, COMPRESSIVE AND SHEAR STRENGTHS ARE GREATLY INCREASED, (3) SETTLEMENT UNDER AN APPLIED LOAD WHEN THE GROUND IS WET IMMEDIATELY CEASES, AND (4) COLOR CHANGES FROM NATURAL PALE YELLOW TO VARIOUS SHADES OF RED. APPLICATION OF THE THERMAL METHOD OF CONSOLIDATION IS DESCRIBED.

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  • Supplemental Notes:
    • 14 FIG, 13 PHOT Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Litvinov, I M
  • Publication Date: 1960

Language

  • English

Media Info

  • Pagination: p. 94-112
  • Monograph Title: SOIL AND FOUNDATION ENGINEERING IN THE UNION OF SOVIET SOCIALIST REPUBLICS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00232657
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:35AM