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Consolidation: Critical Appraisal of Settlement Versus Rate of Settlement (SRS) Approach with Fuzzy Logic

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Ground Characterization and Foundations

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 167))

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Abstract

Analysis of time dependent behavior of clayey soils in vertical consolidation is carried out by plotting the experimental settlement, δ, with its differential (with respect to experimental time, t) dδ/dt. This is called the settlement versus rate of settlement (SRS) approach. A fastest rapid loading method is suggested that gives the coefficient of consolidation, cv values very close to true cv and also shows how near the calculated, and true cv values are by fuzzy logic. The merits and demerits are compared with popular methods. The SRS methods work even when the settlement-time-pressure data at the beginning of load increment is not known. The simple procedure for quantitative isolation of secondary consolidation and creep (from primary consolidation) is suggested. Six phases of consolidation are quantitatively identified instead of three (initial, primary, and secondary). Terzaghi’s one-dimensional consolidation equation is resolved in three parts; (1) parabolic 0–40%U, (2) transition 40–60%U, and (3) exponential 60–100%U, where U is the degree of consolidation. It is shown that the SRS plot is a very powerful and useful tool for consolidation analysis.

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Author information

Authors and Affiliations

  1. Jimma University, Jimma, Ethiopia

    Sudhir Kumar Tewatia

  2. Assam Engineering College, Guwahati, 781013, India

    Malaya Chetia & Taslima Nasrin

  3. Mindsarovar Technologies Private Limited, Bangalore, India

    Kanishck Tewatia

Authors
  1. Sudhir Kumar Tewatia
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  2. Malaya Chetia
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  3. Taslima Nasrin
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  4. Kanishck Tewatia
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Editor information

Editors and Affiliations

  1. Geotechnical Engineering Division, Department of Civil Engineering, Andhra University College of Engineering, Visakhapatnam, Andhra Pradesh, India

    C. N. V. Satyanarayana Reddy

  2. Geotechnical Engineering Division, Department of Civil Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamil Nadu, India

    K. Muthukkumaran

  3. Discipline of Civil Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India

    Neelima Satyam

  4. Geo Dynamics, Vadodara, India

    Ravikiran Vaidya

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Tewatia, S.K., Chetia, M., Nasrin, T., Tewatia, K. (2022). Consolidation: Critical Appraisal of Settlement Versus Rate of Settlement (SRS) Approach with Fuzzy Logic. In: Satyanarayana Reddy, C.N.V., Muthukkumaran, K., Satyam, N., Vaidya, R. (eds) Ground Characterization and Foundations. Lecture Notes in Civil Engineering, vol 167. Springer, Singapore. https://doi.org/10.1007/978-981-16-3383-6_37

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  • DOI: https://doi.org/10.1007/978-981-16-3383-6_37

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  • Online ISBN: 978-981-16-3383-6

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