An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils
Clay–gravel mixture has been widely used in high embankment dams and understanding its seepage characteristics is critical to dam safety. From the instrumental perspective, the realization of continuous pressurized water supply becomes a key technical challenge, significantly restricting the working...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/18/6280 |
| _version_ | 1797517190330580992 |
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| author | Chenghao Chen Shengshui Chen Shiang Mei Shaoyang Han Xian Zhang Yi Tang |
| author_facet | Chenghao Chen Shengshui Chen Shiang Mei Shaoyang Han Xian Zhang Yi Tang |
| author_sort | Chenghao Chen |
| collection | DOAJ |
| description | Clay–gravel mixture has been widely used in high embankment dams and understanding its seepage characteristics is critical to dam safety. From the instrumental perspective, the realization of continuous pressurized water supply becomes a key technical challenge, significantly restricting the working conditions replicated in previous seepage apparatuses. To this end, a novel water provision system, relying on parallel-disposed sensor-based pressure devices, was introduced, so that the application of an existing large-scale stress-controlled apparatus can be expanded to long-term seepage tests regarding coarse-grained cohesive soils. Constant-head permeability tests were conducted on original-graded clay–gravel mixtures to investigate their hydraulic properties, incorporating the influence of stress relaxation. Test results show that with 35% gravel content, the clay–gravel mixture is suitable for dam construction as the core material. The stress relaxation holds a marginal effect on the hydraulic conductivity of soil. The functionality of this improved apparatus is verified, especially under long-term seepage conditions. |
| first_indexed | 2024-03-10T07:13:18Z |
| format | Article |
| id | doaj.art-3478b7d6e1f44a98a475f6074029c5ad |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T07:13:18Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-3478b7d6e1f44a98a475f6074029c5ad2023-11-22T15:14:27ZengMDPI AGSensors1424-82202021-09-012118628010.3390/s21186280An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive SoilsChenghao Chen0Shengshui Chen1Shiang Mei2Shaoyang Han3Xian Zhang4Yi Tang5Department of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaDepartment of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaCollege of Water Resources and Environmental Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, ChinaCollege of Civil Engineering, Hohai University, Nanjing 210098, ChinaDepartment of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaDepartment of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaClay–gravel mixture has been widely used in high embankment dams and understanding its seepage characteristics is critical to dam safety. From the instrumental perspective, the realization of continuous pressurized water supply becomes a key technical challenge, significantly restricting the working conditions replicated in previous seepage apparatuses. To this end, a novel water provision system, relying on parallel-disposed sensor-based pressure devices, was introduced, so that the application of an existing large-scale stress-controlled apparatus can be expanded to long-term seepage tests regarding coarse-grained cohesive soils. Constant-head permeability tests were conducted on original-graded clay–gravel mixtures to investigate their hydraulic properties, incorporating the influence of stress relaxation. Test results show that with 35% gravel content, the clay–gravel mixture is suitable for dam construction as the core material. The stress relaxation holds a marginal effect on the hydraulic conductivity of soil. The functionality of this improved apparatus is verified, especially under long-term seepage conditions.https://www.mdpi.com/1424-8220/21/18/6280clay–gravel mixturenon-stop water provisionhigh hydraulic pressurelong-term seepagestress relaxation |
| spellingShingle | Chenghao Chen Shengshui Chen Shiang Mei Shaoyang Han Xian Zhang Yi Tang An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils Sensors clay–gravel mixture non-stop water provision high hydraulic pressure long-term seepage stress relaxation |
| title | An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils |
| title_full | An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils |
| title_fullStr | An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils |
| title_full_unstemmed | An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils |
| title_short | An Improved Large-Scale Stress-Controlled Apparatus for Long-Term Seepage Study of Coarse-Grained Cohesive Soils |
| title_sort | improved large scale stress controlled apparatus for long term seepage study of coarse grained cohesive soils |
| topic | clay–gravel mixture non-stop water provision high hydraulic pressure long-term seepage stress relaxation |
| url | https://www.mdpi.com/1424-8220/21/18/6280 |
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