Micro-structural Evolution of Granite Residual Soil under External Loading Based on X-ray Micro-computed Tomography
As a completed decomposed product of granite rock, the granite residual soil widely distributes in South China with a special soil structure that can be easily damaged under external disturbance. Therefore, studying the evolution of soil cracks during the loading process is important for engineering...
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| Published in | KSCE journal of civil engineering Vol. 25; no. 8; pp. 2836 - 2846 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Seoul
Korean Society of Civil Engineers
01.08.2021
Springer Nature B.V 대한토목학회 |
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| Abstract | As a completed decomposed product of granite rock, the granite residual soil widely distributes in South China with a special soil structure that can be easily damaged under external disturbance. Therefore, studying the evolution of soil cracks during the loading process is important for engineering practice that needs to evaluate the soil shear strength, such as slope stability analysis. The purpose of this study is to investigate the micro-structure for the intact granite residual soil under external loading base on X-ray computed tomography (CT) through global and local scanning (with resolutions of 180 µm and 26.7 µm, respectively). The micro-structural evolution of the cross-sections of soil column extracted from a granite residual soil layer under axial loading was investigated by CT scanning with a 0.5 mm slice thickness. The number of cracks (including macro-cracks and meso-cracks), area ratios and porosity corresponding to varying loading stages (initial, peak-stress and failure) were analyzed based on the cross-sectional CT images. Test results shows that the structure strength of the soil was mainly subject to macro-cracks. In addition, the increase of the porosity is mainly attributed to the generation and expansion of the cracks along sandy particle under external loading. This study can provide theoretical support and data support for understanding the micro-structural evolution of granite residual soil that is commonly encountered in civil engineering. |
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| AbstractList | As a completed decomposed product of granite rock, the granite residual soil widely distributes in South China with a special soil structure that can be easily damaged under external disturbance. Therefore, studying the evolution of soil cracks during the loading process is important for engineering practice that needs to evaluate the soil shear strength, such as slope stability analysis. The purpose of this study is to investigate the micro-structure for the intact granite residual soil under external loading base on X-ray computed tomography (CT) through global and local scanning (with resolutions of 180 µm and 26.7 µm, respectively). The micro-structural evolution of the cross-sections of soil column extracted from a granite residual soil layer under axial loading was investigated by CT scanning with a 0.5 mm slice thickness. The number of cracks (including macro-cracks and meso-cracks), area ratios and porosity corresponding to varying loading stages (initial, peak-stress and failure) were analyzed based on the cross-sectional CT images. Test results shows that the structure strength of the soil was mainly subject to macro-cracks. In addition, the increase of the porosity is mainly attributed to the generation and expansion of the cracks along sandy particle under external loading. This study can provide theoretical support and data support for understanding the micro-structural evolution of granite residual soil that is commonly encountered in civil engineering. As a completed decomposed product of granite rock, the granite residual soil widely distributes in South China with a special soil structure that can be easily damaged under external disturbance. Therefore, studying the evolution of soil cracks during the loading process is important for engineering practice that needs to evaluate the soil shear strength, such as slope stability analysis. The purpose of this study is to investigate the micro-structure for the intact granite residual soil under external loading base on X-ray computed tomography (CT) through global and local scanning (with resolutions of 180 μm and 26.7 μm, respectively). The micro-structural evolution of the cross-sections of soil column extracted from a granite residual soil layer under axial loading was investigated by CT scanning with a 0.5 mm slice thickness. The number of cracks (including macro-cracks and meso-cracks), area ratios and porosity corresponding to varying loading stages (initial, peak-stress and failure) were analyzed based on the cross-sectional CT images. Test results shows that the structure strength of the soil was mainly subject to macro-cracks. In addition, the increase of the porosity is mainly attributed to the generation and expansion of the cracks along sandy particle under external loading. This study can provide theoretical support and data support for understanding the micro-structural evolution of granite residual soil that is commonly encountered in civil engineering. KCI Citation Count: 7 |
| Author | Huang, Liping Sun, Xiaohui Chen, Rui Wen, Tiande Zhao, Yanru |
| Author_xml | – sequence: 1 givenname: Yanru surname: Zhao fullname: Zhao, Yanru organization: College of Civil Engineering, Shenzhen University – sequence: 2 givenname: Xiaohui surname: Sun fullname: Sun, Xiaohui email: sunxiaohui@szu.edu.cn organization: College of Civil Engineering, Shenzhen University – sequence: 3 givenname: Tiande surname: Wen fullname: Wen, Tiande organization: College of Civil Engineering, Shenzhen University – sequence: 4 givenname: Rui surname: Chen fullname: Chen, Rui organization: Harbin Institute of Technology – sequence: 5 givenname: Liping surname: Huang fullname: Huang, Liping organization: Shenzhen Metro Group Co., Ltd |
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| CitedBy_id | crossref_primary_10_5194_esurf_10_1079_2022 crossref_primary_10_1155_2023_8155349 crossref_primary_10_1007_s12205_023_1166_x crossref_primary_10_1016_j_jhydrol_2024_132133 crossref_primary_10_3390_pr12020409 crossref_primary_10_1155_2022_9948658 crossref_primary_10_3390_app122412549 crossref_primary_10_1038_s41598_024_75092_y crossref_primary_10_1061_JMCEE7_MTENG_14491 |
| Cites_doi | 10.1016/j.geoderma.2011.01.006 10.1007/s11368-019-02560-8 10.1680/geot.2005.55.1.77 10.1007/s10457-009-9264-4 10.1002/saj2.20125 10.1016/j.geoderma.2013.05.017 10.1002/ldr.3446 10.1016/j.marpetgeo.2019.104157 10.1016/j.cageo.2010.02.007 10.1016/j.ecss.2020.106987 10.1016/j.enggeo.2021.106035 10.1016/j.advwatres.2012.07.018 10.1097/00010694-199803000-00004 10.1016/j.geoderma.2013.11.005 10.1016/j.enggeo.2004.01.002 10.2136/sssaj1989.03615995005300030001x 10.1016/j.geoderma.2014.08.006 10.1016/j.enggeo.2012.05.009 10.1016/j.enggeo.2019.105242 10.1016/j.geoderma.2012.02.024 10.1016/j.geoderma.2019.114103 10.5194/bg-8-279-2011 10.1016/j.geoderma.2008.04.004 10.2136/sssaj2007.0057 10.1016/j.enggeo.2020.105785 10.1016/j.still.2014.12.019 10.1016/j.ecocom.2009.05.010 10.1046/j.1365-2389.2003.00546.x 10.1016/j.geoderma.2013.08.037 10.1007/s11440-020-00964-2 10.1016/j.geoderma.2015.11.001 |
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| Keywords | Cracks X-ray CT Porosity Granite residual soil Micro-structure |
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| SubjectTerms | Axial loads Civil Engineering Computed tomography Cracks Engineering Evolution Geotechnical Engineering Geotechnical Engineering & Applied Earth Sciences Granite Industrial Pollution Prevention Porosity Residual soils Scanning Shear strength Slope stability Soil columns Soil layers Soil porosity Soil strength Soil structure Stability analysis Tomography X rays 토목공학 |
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| Title | Micro-structural Evolution of Granite Residual Soil under External Loading Based on X-ray Micro-computed Tomography |
| URI | https://link.springer.com/article/10.1007/s12205-021-0803-5 https://www.proquest.com/docview/2919483407 https://www.kci.go.kr/kciportal/ci/sereArticleSearch/ciSereArtiView.kci?sereArticleSearchBean.artiId=ART002740723 |
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| ispartofPNX | KSCE Journal of Civil Engineering, 2021, 25(8), , pp.2836-2846 |
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