Determination of modulus of deformation using engineering geology studies and in situ tests (Case study)
The engineering properties of geomaterials are determined by laboratory and In-situ testing. Problems associated with sampling, especially in coarse-grained soils, limit the laboratory testing applications to determine the engineering properties of these types of soils. Engineering geological studie...
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| Format: | Article |
| Language: | fas |
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University of Qom
2020-08-01
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| Series: | پژوهشهای زیرساختهای عمرانی |
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| Online Access: | https://cer.qom.ac.ir/article_1762_0e08e5ca5bd1beedeb8c6d8a161f897f.pdf |
| _version_ | 1797233011883769856 |
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| author | Akbar Cheshmi Ali Borhani Reza Hosseini |
| author_facet | Akbar Cheshmi Ali Borhani Reza Hosseini |
| author_sort | Akbar Cheshmi |
| collection | DOAJ |
| description | The engineering properties of geomaterials are determined by laboratory and In-situ testing. Problems associated with sampling, especially in coarse-grained soils, limit the laboratory testing applications to determine the engineering properties of these types of soils. Engineering geological studies would help in-situ test selection as well as managing of the coast and the validity of test results. To increase the height of the Gotvand regulatory dam, determining deformation modules of subsurface material is needed, so a multistage method has been suggested and done. For this purpose, a multi-step method was proposed and performed. In the first stage, the engineering geological properties of subsurface materials have been investigated by using geological study and exploration borehole data. The subsurface materials are gravel with some sand, silt, and clay. At this stage, to determine the modulus of deformability, pressuremeter (PMT), downhole and crosshole tests were performed. Due to the coarse texture and, heterogeneity of the materials, good results were not obtained from the pressurmeter test. in the second stage and with reference to data in first stage, the extension of same strata beneath the dam has specified in river’s left bank and the measurement of deformation modules has done by plate loading test (PLT) using circular plates of 60 cm diameter. In the last stage, to investigate the effect of plate dimensions and particle size, PLT using circular plates of 120 cm diameter has been done. By changing the loading plate diameter from 60 to 120 cm, the average measured modulus decreases from 2868 to 1075 kg/cm2. In this paper, while expressing the importance of engineering geology studies in selecting suitable in situ tests, the results obtained from various tests have been reviewed. |
| first_indexed | 2024-04-24T16:09:24Z |
| format | Article |
| id | doaj.art-e183058ff6924a9bb41a25c3622c10c6 |
| institution | Directory Open Access Journal |
| issn | 2783-140X |
| language | fas |
| last_indexed | 2024-04-24T16:09:24Z |
| publishDate | 2020-08-01 |
| publisher | University of Qom |
| record_format | Article |
| series | پژوهشهای زیرساختهای عمرانی |
| spelling | doaj.art-e183058ff6924a9bb41a25c3622c10c62024-03-31T19:58:13ZfasUniversity of Qomپژوهشهای زیرساختهای عمرانی2783-140X2020-08-016110311310.22091/cer.2020.6117.12171762Determination of modulus of deformation using engineering geology studies and in situ tests (Case study)Akbar Cheshmi0Ali Borhani1Reza Hosseini2School of Geology, College of Sciences, University of Tehran.Faculty of Civil Engineering, Amir Kabir University of TechnologyFaculty of Geology, Ferdowsi University of Mashhad.The engineering properties of geomaterials are determined by laboratory and In-situ testing. Problems associated with sampling, especially in coarse-grained soils, limit the laboratory testing applications to determine the engineering properties of these types of soils. Engineering geological studies would help in-situ test selection as well as managing of the coast and the validity of test results. To increase the height of the Gotvand regulatory dam, determining deformation modules of subsurface material is needed, so a multistage method has been suggested and done. For this purpose, a multi-step method was proposed and performed. In the first stage, the engineering geological properties of subsurface materials have been investigated by using geological study and exploration borehole data. The subsurface materials are gravel with some sand, silt, and clay. At this stage, to determine the modulus of deformability, pressuremeter (PMT), downhole and crosshole tests were performed. Due to the coarse texture and, heterogeneity of the materials, good results were not obtained from the pressurmeter test. in the second stage and with reference to data in first stage, the extension of same strata beneath the dam has specified in river’s left bank and the measurement of deformation modules has done by plate loading test (PLT) using circular plates of 60 cm diameter. In the last stage, to investigate the effect of plate dimensions and particle size, PLT using circular plates of 120 cm diameter has been done. By changing the loading plate diameter from 60 to 120 cm, the average measured modulus decreases from 2868 to 1075 kg/cm2. In this paper, while expressing the importance of engineering geology studies in selecting suitable in situ tests, the results obtained from various tests have been reviewed.https://cer.qom.ac.ir/article_1762_0e08e5ca5bd1beedeb8c6d8a161f897f.pdfplate load testdownhole and crosshole testscoarse grained soilin situ testengineering geology |
| spellingShingle | Akbar Cheshmi Ali Borhani Reza Hosseini Determination of modulus of deformation using engineering geology studies and in situ tests (Case study) پژوهشهای زیرساختهای عمرانی plate load test downhole and crosshole tests coarse grained soil in situ test engineering geology |
| title | Determination of modulus of deformation using engineering geology studies and in situ tests (Case study) |
| title_full | Determination of modulus of deformation using engineering geology studies and in situ tests (Case study) |
| title_fullStr | Determination of modulus of deformation using engineering geology studies and in situ tests (Case study) |
| title_full_unstemmed | Determination of modulus of deformation using engineering geology studies and in situ tests (Case study) |
| title_short | Determination of modulus of deformation using engineering geology studies and in situ tests (Case study) |
| title_sort | determination of modulus of deformation using engineering geology studies and in situ tests case study |
| topic | plate load test downhole and crosshole tests coarse grained soil in situ test engineering geology |
| url | https://cer.qom.ac.ir/article_1762_0e08e5ca5bd1beedeb8c6d8a161f897f.pdf |
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