PROBLEMS OF FROZEN SOIL MECHANICS IN ENGINEERING PRACTICE

MORE THAN A QUARTER OF THE WORLD'S LAND AND ABOUT 47 PERCENT OF THE USSR TERRITORY ARE COVERED BY PERMANENTLY FROZEN SOILS. THE DEFORMATIONS OF STRUCTURES BUILT ON PERMANENTLY FROZEN SOILS ARE DUE TO THEIR SETTLING AT UNPROPORTIONAL THAWING AND THE HEAVING OF SOILS AND FOUNDATIONS AT FREEZING. THE MOST IMPORTANT PARAMETERS OF FROZEN SOILS ARE: (1) SHEARING STRENGTH, AS THE INITIAL VALUE FOR LIMIT LOAD AND DEFORMATION MODULUS OF FROZEN SOILS DETERMINATION, WHEN THEY ARE CONSIDERED AS FOUNDATIONS, (2) CONTINUOUS STRENGTH AND DEFORMATION MODULI OF FROZEN SOILS, AS CONSTRUCTIONS MATERIALS, AND (3) HEAVING FORCES, CONGELATION STRENGTH, SOLIDITY COEFFICIENTS OF FROZEN SOILS AS A MEDIUM FOR CONSTRUCTION. FIGURES PRESENT THE RESULTS OF EXPERIMENTAL INVESTIGATIONS OF FROZEN SOIL MECHANICS: (1) THE PRINCIPLE OF DYNAMIC BALANCE OF WATER AND ICE IN FROZEN SOILS, (2) THE CONDITIONS OF WATER MIGRATION IN FREEZING AND FROZEN SOILS, (3) DEPENDENCE OF FROZEN SOIL STRENGTHS ON THEIR COMPOSITION, TEMPERATURE AND STRUCTURE, (4) DECREASE OF FROZEN SOIL STRENGTH TO EXTERNAL FORCES WITH TIME DUE TO THE RELAXATION OF STRESSES, (5) THE CONDITIONS OF FROZEN SOIL DENSIFICATION AND THE BEGINNING OF PLASTIC FLOW, (6) THE DEPENDENCE OF FROZEN SOILS SETTLEMENTS AT THAWING ON THE VALUE OF EXTERNAL PRESSURE, AND (7) THE BREAKING OF STRUCTURAL BONDS IN FREEZING-THAWING CYCLES. SOME GENERAL SOLUTIONS ARE PRESENTED OF ENGINEERING PROBLEMS CONCERNING THE MECHANICS OF FROZEN SOILS INCLUDING THE CALCULATIONS OF FOUNDATIONS WITH PRESERVATION OF PERMAFROST ACCORDING TO THE CONSTRUCTIVE METHOD, TAKING INTO ACCOUNT THE THAWING SETTLEMENTS, AND BY THE METHOD OF PRECONSTRUCTION THAWING.

Media Info

  • Monograph Title: SOIL AND FOUNDATION ENGINEERING IN THE UNION OF SOVIET SOCIALIST REPUBLICS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00237776
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 2 1994 12:00AM