Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics
Introduction. The most common method of determining the mechanical characteristics of the soil is triaxial compression testing. This type of testing is widely used both for applied and scientific purposes, and is described in the works of both domestic and foreign authors, as well as in regulatory a...
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Moscow State University of Civil Engineering (MGSU)
2023-10-01
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| author | A. Z. Ter-Martirosyan G. O. Anzhelo L. Yu. Ermoshina I. A. Bokov A. V. Manukyan |
| author_facet | A. Z. Ter-Martirosyan G. O. Anzhelo L. Yu. Ermoshina I. A. Bokov A. V. Manukyan |
| author_sort | A. Z. Ter-Martirosyan |
| collection | DOAJ |
| description | Introduction. The most common method of determining the mechanical characteristics of the soil is triaxial compression testing. This type of testing is widely used both for applied and scientific purposes, and is described in the works of both domestic and foreign authors, as well as in regulatory and technical documentation. However, within the framework of scientific works by various authors, the coefficient of uneven expansion of a soil sample during triaxial tests is often neglected and is not taken into account when processing the test results. In the existing current regulatory and technical documents, such as GOST 12248.3–2020, consideration of the coefficient of uneven expansion of the soil sample under triaxial compression b is of a recommendatory nature.Materials and methods. Within the framework of the work, experimental studies by the triaxial compression method were carried out on sandy soil samples of different granulometric composition in order to determine its mechanical characteristics using two different methods of processing laboratory test results — taking into account the coefficient of uneven expansion of the soil sample and without it.Results. According to the results of the performed experimental studies, it was found that the exclusion of the expansion non-linearity coefficient b from the processing of laboratory test results leads to a significant overestimation of the values of the internal friction angle. However, the values of secant modulus of deformation at 50 % strength E50 are lower by an average of 7.7 % when the nonlinear expansion coefficient of the steel is excluded from the processing.Conclusions. Analyzing the results obtained, as well as taking into account various factors influencing the results of the study (density, humidity, etc.), additional laboratory tests are required in order to further clarify the correlation dependencies in determining the strength and deformation characteristics of sandy soils, with and without taking into account the coefficient b. |
| format | Article |
| id | doaj-art-8675fdd4fd0d4f9b92dcd46b5a01e8c6 |
| institution | Kabale University |
| issn | 1997-0935 2304-6600 |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Moscow State University of Civil Engineering (MGSU) |
| record_format | Article |
| series | Vestnik MGSU |
| spelling | doaj-art-8675fdd4fd0d4f9b92dcd46b5a01e8c62025-01-09T08:22:48ZengMoscow State University of Civil Engineering (MGSU)Vestnik MGSU1997-09352304-66002023-10-0118101574158610.22227/1997-0935.2023.10.1574-158632Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristicsA. Z. Ter-Martirosyan0G. O. Anzhelo1L. Yu. Ermoshina2I. A. Bokov3A. V. Manukyan4Moscow State University of Civil Engineering (National Research University) (MGSU)Moscow State University of Civil Engineering (National Research University) (MGSU)Moscow State University of Civil Engineering (National Research University) (MGSU)Moscow State University of Civil Engineering (National Research University) (MGSU)Concern MonArchIntroduction. The most common method of determining the mechanical characteristics of the soil is triaxial compression testing. This type of testing is widely used both for applied and scientific purposes, and is described in the works of both domestic and foreign authors, as well as in regulatory and technical documentation. However, within the framework of scientific works by various authors, the coefficient of uneven expansion of a soil sample during triaxial tests is often neglected and is not taken into account when processing the test results. In the existing current regulatory and technical documents, such as GOST 12248.3–2020, consideration of the coefficient of uneven expansion of the soil sample under triaxial compression b is of a recommendatory nature.Materials and methods. Within the framework of the work, experimental studies by the triaxial compression method were carried out on sandy soil samples of different granulometric composition in order to determine its mechanical characteristics using two different methods of processing laboratory test results — taking into account the coefficient of uneven expansion of the soil sample and without it.Results. According to the results of the performed experimental studies, it was found that the exclusion of the expansion non-linearity coefficient b from the processing of laboratory test results leads to a significant overestimation of the values of the internal friction angle. However, the values of secant modulus of deformation at 50 % strength E50 are lower by an average of 7.7 % when the nonlinear expansion coefficient of the steel is excluded from the processing.Conclusions. Analyzing the results obtained, as well as taking into account various factors influencing the results of the study (density, humidity, etc.), additional laboratory tests are required in order to further clarify the correlation dependencies in determining the strength and deformation characteristics of sandy soils, with and without taking into account the coefficient b.https://www.vestnikmgsu.ru/jour/article/view/84laboratory teststriaxial compressionsandstrength characteristicsdeformation characteristicscoefficient of uneven expansion of the soil sample under triaxial compression |
| spellingShingle | A. Z. Ter-Martirosyan G. O. Anzhelo L. Yu. Ermoshina I. A. Bokov A. V. Manukyan Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics Vestnik MGSU laboratory tests triaxial compression sand strength characteristics deformation characteristics coefficient of uneven expansion of the soil sample under triaxial compression |
| title | Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics |
| title_full | Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics |
| title_fullStr | Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics |
| title_full_unstemmed | Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics |
| title_short | Influence of the coefficient of non-uniform expansion of the soil sample on mechanical characteristics |
| title_sort | influence of the coefficient of non uniform expansion of the soil sample on mechanical characteristics |
| topic | laboratory tests triaxial compression sand strength characteristics deformation characteristics coefficient of uneven expansion of the soil sample under triaxial compression |
| url | https://www.vestnikmgsu.ru/jour/article/view/84 |
| work_keys_str_mv | AT aztermartirosyan influenceofthecoefficientofnonuniformexpansionofthesoilsampleonmechanicalcharacteristics AT goanzhelo influenceofthecoefficientofnonuniformexpansionofthesoilsampleonmechanicalcharacteristics AT lyuermoshina influenceofthecoefficientofnonuniformexpansionofthesoilsampleonmechanicalcharacteristics AT iabokov influenceofthecoefficientofnonuniformexpansionofthesoilsampleonmechanicalcharacteristics AT avmanukyan influenceofthecoefficientofnonuniformexpansionofthesoilsampleonmechanicalcharacteristics |