Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil
The coefficient of earth pressure at rest, <i>K</i><sub>0</sub>, is a significant mechanical parameter, and the investigation of the <i>K</i><sub>0</sub> of coarse-grained soil has important theoretical significance and applicational value in geotechni...
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MDPI AG
2023-04-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/4/1059 |
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| author | Ming-Jie Jiang Huo-Liang Xie Chao-Rong Fang Ke-Xin Zhang Jun-Gao Zhu |
| author_facet | Ming-Jie Jiang Huo-Liang Xie Chao-Rong Fang Ke-Xin Zhang Jun-Gao Zhu |
| author_sort | Ming-Jie Jiang |
| collection | DOAJ |
| description | The coefficient of earth pressure at rest, <i>K</i><sub>0</sub>, is a significant mechanical parameter, and the investigation of the <i>K</i><sub>0</sub> of coarse-grained soil has important theoretical significance and applicational value in geotechnical engineering. However, there are few studies on the influence of the initial dry density (<i>ρ<sub>d</sub></i>) on the <i>K</i><sub>0</sub> of coarse-grained soil due to the limitations of the related test instruments or methods. A series of <i>K</i><sub>0</sub> tests for two types of coarse-grained soils (rockfill soil and sandy-gravel soil) were conducted based on a newly developed large-scale apparatus to reveal the relationship between the <i>K</i><sub>0</sub> and <i>ρ<sub>d</sub></i> of coarse-grained soil. The test results showed that the <i>K</i><sub>0</sub> of coarse-grained soil decreases with an increase in vertical stress, and this trend tends to be gentle with respect to the increase in vertical stress. The results also implied that there was a negative linear relationship between the <i>K</i><sub>0</sub> of coarse-grained soil and <i>ρ<sub>d</sub></i>. Furthermore, a comparative analysis between rockfill soil and sandy-gravel soil indicated that the relative equation proposed by the authors was appropriate for any type of coarse-grained soil with any <i>ρ<sub>d</sub></i>. Moreover, an empirical equation that can accurately describe the effective relationship of <i>σ<sub>v</sub></i> and <i>ρ<sub>d</sub></i> with the <i>K</i><sub>0</sub> for coarse-grained soil was proposed, and the accuracy of the empirical equations were verified by the <i>K</i><sub>0</sub> test results concerning sand-gravel soil. Finally, based on the published research findings, the empirical equations’ applicability to any coarse-grained soil was verified. |
| first_indexed | 2024-03-11T05:10:01Z |
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| language | English |
| last_indexed | 2024-03-11T05:10:01Z |
| publishDate | 2023-04-01 |
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| spelling | doaj.art-584af4bdf2474c2085f77973036a8e492023-11-17T18:36:53ZengMDPI AGBuildings2075-53092023-04-01134105910.3390/buildings13041059Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained SoilMing-Jie Jiang0Huo-Liang Xie1Chao-Rong Fang2Ke-Xin Zhang3Jun-Gao Zhu4College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaThe coefficient of earth pressure at rest, <i>K</i><sub>0</sub>, is a significant mechanical parameter, and the investigation of the <i>K</i><sub>0</sub> of coarse-grained soil has important theoretical significance and applicational value in geotechnical engineering. However, there are few studies on the influence of the initial dry density (<i>ρ<sub>d</sub></i>) on the <i>K</i><sub>0</sub> of coarse-grained soil due to the limitations of the related test instruments or methods. A series of <i>K</i><sub>0</sub> tests for two types of coarse-grained soils (rockfill soil and sandy-gravel soil) were conducted based on a newly developed large-scale apparatus to reveal the relationship between the <i>K</i><sub>0</sub> and <i>ρ<sub>d</sub></i> of coarse-grained soil. The test results showed that the <i>K</i><sub>0</sub> of coarse-grained soil decreases with an increase in vertical stress, and this trend tends to be gentle with respect to the increase in vertical stress. The results also implied that there was a negative linear relationship between the <i>K</i><sub>0</sub> of coarse-grained soil and <i>ρ<sub>d</sub></i>. Furthermore, a comparative analysis between rockfill soil and sandy-gravel soil indicated that the relative equation proposed by the authors was appropriate for any type of coarse-grained soil with any <i>ρ<sub>d</sub></i>. Moreover, an empirical equation that can accurately describe the effective relationship of <i>σ<sub>v</sub></i> and <i>ρ<sub>d</sub></i> with the <i>K</i><sub>0</sub> for coarse-grained soil was proposed, and the accuracy of the empirical equations were verified by the <i>K</i><sub>0</sub> test results concerning sand-gravel soil. Finally, based on the published research findings, the empirical equations’ applicability to any coarse-grained soil was verified.https://www.mdpi.com/2075-5309/13/4/1059coefficient of earth pressure at restcoarse-grained soilinitial relative densityeffective vertical stresssoil type |
| spellingShingle | Ming-Jie Jiang Huo-Liang Xie Chao-Rong Fang Ke-Xin Zhang Jun-Gao Zhu Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil Buildings coefficient of earth pressure at rest coarse-grained soil initial relative density effective vertical stress soil type |
| title | Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil |
| title_full | Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil |
| title_fullStr | Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil |
| title_full_unstemmed | Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil |
| title_short | Experimental Study on Influence of Initial Relative Dry Density on <i>K</i><sub>0</sub> of Coarse-Grained Soil |
| title_sort | experimental study on influence of initial relative dry density on i k i sub 0 sub of coarse grained soil |
| topic | coefficient of earth pressure at rest coarse-grained soil initial relative density effective vertical stress soil type |
| url | https://www.mdpi.com/2075-5309/13/4/1059 |
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