Determination of Strength Parameters of Soils Based on the Results of Plate Load Tests

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Abstract

To determine the strength characteristics of foundation soils, modern surveying practice includes a number of field and laboratory methods. The methods are evolving along with the technical capabilities of the surveyors and the theoretical basis associated with soil mechanics research. One of the methods that have prospects of development is the plate load test. The aim of this work is to develop a methodology that allows to determine the strength parameters of soil based on the result of the plate load test, taking into account the influence of the scale effect. In the course of the work, a methodology was developed, including recommendations for testing and for processing the test results to obtain strength parameters that can be used in different ranges of average stresses due to the correction introduced to account for the scale effect (nonlinearity of the strength graph). On the basis of the presented methodology, the application has been developed that allows to automatically carry out selection of strength parameters and their correction depending on the value of average stresses entered by the user. Selection results in the application, their description and comparison with laboratory test results are presented.

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About the authors

A. Z. Ter-Martirosyan

National Research Moscow State University of Civil Engineering

Author for correspondence.
Email: gic-mgsu@mail.ru

Doctor of Sciences (Engineering)

Russian Federation, 26, Yaroslavskoe Highway, Moscow, 12933

K. A. Filippov

National Research Moscow State University of Civil Engineering

Email: 4155599@gmail.com

Post Graduate

Russian Federation, 26, Yaroslavskoe Highway, Moscow, 12933

References

  1. Ter-Martirosyan A.Z., Filippov K.A. Stamp tests. Development prospects. Construction and Geotechnics. 2024. Vol. 15. No. 1, pp. 61–82. EDN: KMISPO. https://doi.org/10.15593/2224-9826/2024.1.05
  2. Ter-Martirosyan A.Z., Filippov K.A. Experimental studies of round dies on a sandy base under vertical load. Osnovaniya, Fundamenty i Mekhanika Gruntov. 2024. No. 6, pp. 21–25. (In Russian). EDN: WVYDDQ
  3. Ter-Martirosyan Z.G., Ter-Martirosyan A.Z., Vanina Yu.V. Prolonged precipitation and bearing capacity of foundations near vertical excavation at different soil viscosity parameters. Vestnik of the State University of Civil Engineering. 2022. Vol. 17. Iss. 12, pp. 1664–1676. (In Russian). EDN: GSBVGV. https://doi.org/10.22227/1997-0935.2022.12.1664-1676
  4. Ter-Martirosyan Z.G., Ter-Martirosyan A.Z., Ermoshina L.Yu. Sedimentation and long-term bearing capacity of piles, taking into account the rheological properties of soils. Construction and Geotechnics. 2022. Vol. 13. No. 1, pp. 5–15. EDN: QMSCUZ. https://doi.org/10.15593/2224-9826/2022.1.01
  5. Ter-Martirosyan Z.G., Ter-Martirosyan A.Z., Filippov K.A. Precipitation and bearing capacity of a round stamp on an elastoplastic base. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2022. No. 12, pp. 3–7. (In Russian). EDN: GJXQBR. https://doi.org/10.31659/0044-4472-2022-12-3-7
  6. Ter-Martirosyan A.Z., Ter-Martirosyan Z.G., Luzin I.N. Stress-strain state of foundations of deep-laid foundations. Construction and Geotechnics. 2017. Vol. 8. No. 2, pp. 96–103. EDN: YYZKHJ. https://doi.org/10.15593/2224-9826/2017.2.09
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  8. Boldyrev G.G., Melnikov A.V., Novichok G.A. Interpretation of laboratory test results to determine the deformation characteristics of soils. Inzhenernye Izyskaniya. 2014. No. 5–6, pp. 98–99. EDN: SJCUGT

Supplementary files

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2. Fig. 1. Block diagram of the programme for selection of strength parameters. Module 1

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3. Fig. 2. Block diagram of the programme for selection of strength parameters. Module 2

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4. Fig. 3. Scheme for solving the problem of determining the strength parameters of the of soil based on the results of plate load test: 1 – non-linear graph of the envelope of Mohr circles; 2, 3, 4 – variants of limiting straight lines for the linear strength law; a – points determined by the results of stamp tests; b, c – areas in which the bearing capacity is overestimated when using straight line «2»; I, II, III – zones of using experimental strength parameters

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5. Fig. 4. UltimateLoadCalculator programme interface with calculation results (without results correction)

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6. Fig. 5. UltimateLoadCalculator programme interface with calculation results (result corrected for average stresses of 100 kPa)

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7. Fig. 6. UltimateLoadCalculator programme interface with calculation results (result corrected for average stresses of 500 kPa)

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8. Fig. 7. Results of determination of strength parameters in shear strength tests [2]

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