PRINCIPLES AND PRACTICE OF SOIL STABILIZATION

THE THEORY AND PRACTICE OF SOIL STABILIZATION ARE REVIEWED. SOIL STABILIZATION INVOLVES THE SUPPLYING OF A DEFENSE MECHANISM AGAINST THE CONTINUOUS REACTING DYNAMIC FORCES CONNECTED WITH THE EXPOSURE OF THE RESPECTIVE SOIL BODY TO DAILY AND SEASONAL MOISTURE AND TEMPERATURE CHANGES AND TO MICROBIAL ACTIVITY, WHICH ALL TEND TOWARD LOWERING ITS MECHANICAL STABILITY. THE SCHEME OF SOIL CLASSIFICATION USED BY THE U. S. SOIL SURVEY, DEPARTMENT OF AGRICULTURE IS OUTLINED AND DISCUSSED. THE FOLLOWING DESTRUCTIVE ACTIONS ARE ANALYZED: CLIMATE, THE MECHANISM OF WATER ATTACK ON DRY COHESIVE SYSTEMS, THE CONDITION OF WATER IN POROUS SYSTEMS, FROST HEAVING AND FORMATION OF ICE LENSES. THE FOLLOWING DIFFERENT METHODS OF SOIL STABILIZATION ARE ANALYZED: MECHANICAL, PHYSICAL, AND PHYSICO-CHEMICAL AND COLLOID-CHEMICAL. THE MECHANICAL METHOD INVOLVES MANIPULATION AND COMPACTION OF COHESIVE SOILS AT THEIR OPTIMUM LIQUID CONTENT TO GREATEST DENSITY OBTAINABLE WITH AVAILABLE EQUIPMENT, AND VIBRATION FOR DENSIFICATION OF NON-COHESIVE SOILS. THE DENSIFICATION OF SOILS INCREASES THEIR FRICTIONAL AND COHESIVE STABILITY AND DECREASES THE PORE VOLUME AND ITS ACCESSIBILITY TO WATER. THE PHYSICAL METHOD INVOLVES ESTABLISHMENT OF PROPER GRADATION OF COARSE AND FINE SOIL CONSTITUENTS, SUCH AS CLAY-GRAVEL AND SAND-CLAY SYSTEMS. THIS TYPE OF STABILIZATION IS BASED MAINLY ON PHYSICAL PHENOMENA. STABILITY UNDER BOTH WET AND DRY CONDITIONS IS SOUGHT BY PROPER BLENDING OF COHESIVE SOILS WITH GRANULAR AGGREGATE, WHEREBY THE LATTER MAY RANGE FROM THE SIZE OF SAND TO THAT OF LARGE GRAVEL. THE PHYSICO-CHEMICAL AND COLLOID-CHEMICAL METHODS INVOLVE CHANGE OF SOIL PROPERTIES BY SURFACE- CHEMICAL EFFECTS, INORGANIC AND ORGANIC CEMENTS, ETC. BITUMEN IS OFTEN EMPLOYED AS A WATER PROOFING OR CEMENTING AGENT FOR SOIL STABILIZATION. THE FOLLOWING FOUR TYPES OF BITUMINOUS SOIL STABILIZATION ARE COMMON: (1) SOIL- BITUMEN PROPER, A WATERPROOFED COHESIVE SOIL SYSTEM, (2) SAND-BITUMEN, A SYSTEM IN WHICH LOOSE BEACH, DUNE, OR OTHER SAND OF SIMILAR CHARACTER IS CEMENTED TOGETHER BY BITUMINOUS MATERIAL, (3) WATERPROOFED MECHANICAL STABILIZATION IN WHICH THE SOIL MATERIAL POSSESSES GOOD GRADATION FROM COARSE TO FINE CONSTITUENTS, MEETING CERTAIN HIGH POTENTIAL DENSITY REQUIREMENTS, AND IS WATERPROOFED BY UNIFORM DISTRIBUTION OF SMALL AMOUNTS OF BITUMEN, AND (4) OILED EARTH, IN WHICH THE SURFACE OF AN EARTH ROAD IS MADE WATER RESISTANT BY THE APPLICATION OF SLOW OR MEDIUM CURING ROAD OILS. THE TERM SOIL-BITUMEN IS USUALLY APPLIED TO COHESIVE SOILS WHICH HAVE BEEN WATERPROOFED BY MEANS OF A BITUMINOUS ADMIXTURE. CONSTRUCTION AND MAINTENANCE PROCEDURES FOR SOIL-BITUMINOUS AND SOIL-CEMENT ROADS ARE DISCUSSED. INJECTION METHODS EMPLOYED FOR THE STABILIZATION AND IMPERMEABILIZATION OF FOUNDATIONS, LEVEES, AND SIMILAR STRUCTURES ARE DESCRIBED.

  • Supplemental Notes:
    • Vol 6 pp 459-492, 5 FIG, 4 TAB, 33 REF
  • Corporate Authors:

    Colloid Chemistry

    ,    
  • Authors:
    • Winterkorn, H F
  • Publication Date: 0

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Filing Info

  • Accession Number: 00231433
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:24AM