Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity
To study the relationship between matrix suction and conductivity in unsaturated granite residual soil and realize the matrix suction prediction of soil slope based on conductivity, laboratory and field tests are carried out on undisturbed soil at different depths of the Yandou village landslide in...
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Frontiers Media S.A.
2022-03-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.840506/full |
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| author | Ruimin Chen Yunzhao Lin Qingling Liu Hongqiang Dou Luis F. Robledo Wenbin Jian Wenbin Jian |
| author_facet | Ruimin Chen Yunzhao Lin Qingling Liu Hongqiang Dou Luis F. Robledo Wenbin Jian Wenbin Jian |
| author_sort | Ruimin Chen |
| collection | DOAJ |
| description | To study the relationship between matrix suction and conductivity in unsaturated granite residual soil and realize the matrix suction prediction of soil slope based on conductivity, laboratory and field tests are carried out on undisturbed soil at different depths of the Yandou village landslide in Sanming City, Fujian Province, China. Through physical and chemical property analysis, soil-water characteristic curves and electric parameter matrix suction prediction models for unsaturated granite residual soil at different depths of the target area are obtained. Based on the proposed model, the matrix suction distribution of on-site soil slope is predicted and the dynamic response law under the influence of artificial rainfall is studied. The results show that: (1) The transverse conductivity, average structure factor, average shape factor, and anisotropy coefficient of unsaturated soil are related to the soil saturation degree. By considering the above parameters, the comprehensive structure parameter Re is introduced and its functional relationship with matrix suction is established. (2) Under artificial simulated rainfall, the saturation, hysteresis of the conductivity parameters, and matrix suction response of the slope occurs, which is controlled by soil depth, permeability and rainfall intensity. The matrix suction is distributed in layers on the profile and its recovery rate is slower than saturation. The suction contour map shows a parabola shape with the opening downward. (3) The relationship between the conductivity parameters of the residual soil slope and matrix suction is further revealed and a new method to indirectly measure matrix suction is proposed. Its feasibility is verified based on field tests, which is of great significance to landslide monitoring and early warning. |
| first_indexed | 2024-12-13T06:39:55Z |
| format | Article |
| id | doaj.art-787339a12d04442986cad47d52ab75d7 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-13T06:39:55Z |
| publishDate | 2022-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-787339a12d04442986cad47d52ab75d72022-12-21T23:56:27ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-03-011010.3389/feart.2022.840506840506Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical ConductivityRuimin Chen0Yunzhao Lin1Qingling Liu2Hongqiang Dou3Luis F. Robledo4Wenbin Jian5Wenbin Jian6Zijin School of Geology and Mining, Fuzhou University, Fuzhou, ChinaZijin School of Geology and Mining, Fuzhou University, Fuzhou, ChinaZijin School of Geology and Mining, Fuzhou University, Fuzhou, ChinaZijin School of Geology and Mining, Fuzhou University, Fuzhou, ChinaEngineering Science Department, Andres Bello University, Santiago, ChileZijin School of Geology and Mining, Fuzhou University, Fuzhou, ChinaEngineering Research Center of Geological Engineering, Fuzhou University, Fuzhou, ChinaTo study the relationship between matrix suction and conductivity in unsaturated granite residual soil and realize the matrix suction prediction of soil slope based on conductivity, laboratory and field tests are carried out on undisturbed soil at different depths of the Yandou village landslide in Sanming City, Fujian Province, China. Through physical and chemical property analysis, soil-water characteristic curves and electric parameter matrix suction prediction models for unsaturated granite residual soil at different depths of the target area are obtained. Based on the proposed model, the matrix suction distribution of on-site soil slope is predicted and the dynamic response law under the influence of artificial rainfall is studied. The results show that: (1) The transverse conductivity, average structure factor, average shape factor, and anisotropy coefficient of unsaturated soil are related to the soil saturation degree. By considering the above parameters, the comprehensive structure parameter Re is introduced and its functional relationship with matrix suction is established. (2) Under artificial simulated rainfall, the saturation, hysteresis of the conductivity parameters, and matrix suction response of the slope occurs, which is controlled by soil depth, permeability and rainfall intensity. The matrix suction is distributed in layers on the profile and its recovery rate is slower than saturation. The suction contour map shows a parabola shape with the opening downward. (3) The relationship between the conductivity parameters of the residual soil slope and matrix suction is further revealed and a new method to indirectly measure matrix suction is proposed. Its feasibility is verified based on field tests, which is of great significance to landslide monitoring and early warning.https://www.frontiersin.org/articles/10.3389/feart.2022.840506/fullelectric conductivitymatrix suctionunsaturated soilartificial rainfallexperimental investigation |
| spellingShingle | Ruimin Chen Yunzhao Lin Qingling Liu Hongqiang Dou Luis F. Robledo Wenbin Jian Wenbin Jian Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity Frontiers in Earth Science electric conductivity matrix suction unsaturated soil artificial rainfall experimental investigation |
| title | Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity |
| title_full | Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity |
| title_fullStr | Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity |
| title_full_unstemmed | Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity |
| title_short | Prediction of Matrix Suction of Unsaturated Granite Residual Soil Slope Based on Electrical Conductivity |
| title_sort | prediction of matrix suction of unsaturated granite residual soil slope based on electrical conductivity |
| topic | electric conductivity matrix suction unsaturated soil artificial rainfall experimental investigation |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.840506/full |
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