THE PRIMARY/SECONDARY TRANSITION DURING THE CONSOLIDATION OF CLAY

PRIMARY THEORY AND IN PARTICULAR THE T/H2 SIMILARITY RULE ARE SHOWN TO BE UNLIKELY TO BE RELEVANT FOR THICK STRATA OF REAL SOILS. THE CONVENTIONAL ASSUMPTION THAT THE TRANSITION FROM THE PRIMARY TO THE SECONDARY STAGES OF CONSOLIDATION OCCURS SIMULTANEOUSLY AT ALL DEPTHS WITHIN A CLAY STRATUM IS SHOWN TO BE AN APPROXIMATION. WHATEVER CRITERION IS USED TO DISTINGUISH BETWEEN PRIMARY AND SECONDARY PROCESSES, THE TRANSITION MUST TAKE PLACE AT THE DRAINAGE SURFACE(S) IMMEDIATELY UPON APPLICATION OF INCREMENTS OF LOAD AND PROGRESS THROUGH THE STRATUM TOWARDS THE MID-PLANE AS CONSOLIDATION PROCEEDS. ALTHOUGH PRESENTED IN THE CONTEXT OF THE ONE- DIMENSIONAL CONSOLIDATION OF SATURATED CLAYS THE IDEAS PRESENTED ARE NOT RESTRICTED TO THAT CASE. DEPTH-TIME LOCI OF TRANSITION FROM THE PRIMARY TO THE SECONDARY STAGES ARE DERIVED FOR AN 'IDEAL' SOIL AND FOR A 'REAL' SOIL. THE NEED FOR A THEORY WHICH UNITES THE PRIMARY AND SECONDARY STAGES UNDER THE CONTROL OF A SINGLE SET OF EQUATIONS IS EMPHASIZED. ONLY WITH THE AID OF SUCH A UNIFIED THEORY MAY THE RESULTS OF TESTS ON THIN LABORATORY SAMPLES BE USED TO PREDICT THE BEHAVIOR OF THICK FIELD STRATA. /AUTHOR/

  • Authors:
    • Hawley, J G
  • Publication Date: 0

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00237055
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Nov 18 1973 12:00AM