Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation
The thermal conductivity of soil is a key factor influencing the heat transfer process and temperature distribution, which has significant implications for the design and implementation of freezing methods in geotechnical engineering. To address the challenge of freezing the deeply buried sandy clay...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Soils and Foundations |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0038080624001434 |
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| _version_ | 1841553888944062464 |
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| author | Yi Cao Yansen Wang Chuanxin Rong Hao Li Bin Wang Xin Shi Jie Zhang |
| author_facet | Yi Cao Yansen Wang Chuanxin Rong Hao Li Bin Wang Xin Shi Jie Zhang |
| author_sort | Yi Cao |
| collection | DOAJ |
| description | The thermal conductivity of soil is a key factor influencing the heat transfer process and temperature distribution, which has significant implications for the design and implementation of freezing methods in geotechnical engineering. To address the challenge of freezing the deeply buried sandy clay layer using the freezing method in the drilling wells of the Huainan-Huaibei mining area, experimental research was conducted on the thermal conductivity of sandy clay and its microstructure. Utilizing the transient plane source method, variations in thermal conductivity with water content, dry density, sand content, and temperature were observed, revealing the patterns and mechanisms underlying these changes. The findings indicate that the thermal conductivity of frozen sandy clay mainly undergoes three stages of temperature variation. During the rapid increase phase (Ⅱ), the thermal conductivity rises sharply with decreasing temperature, exhibiting a “leap” trend. As the water content increases, the range of the thermal conductivity leap gradually narrows. When the water content increases from 15 % to 22.5 %, the corresponding leap range decreases to 0 ∼ -5℃. Microstructural parameters quantitatively reflect the intrinsic reasons for changes in soil thermal conductivity from a microscopic perspective, indicating that these characteristics significantly affect its thermal conductivity. |
| format | Article |
| id | doaj-art-5ceb39fd991c4fd5bba78a7370130ad8 |
| institution | Kabale University |
| issn | 2524-1788 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Soils and Foundations |
| spelling | doaj-art-5ceb39fd991c4fd5bba78a7370130ad82025-01-09T06:12:10ZengElsevierSoils and Foundations2524-17882025-02-01651101565Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formationYi Cao0Yansen Wang1Chuanxin Rong2Hao Li3Bin Wang4Xin Shi5Jie Zhang6State Key Laboratory of Intelligent Construction and Healthy Operation & Maintenance of Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation & Maintenance of Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China; Corresponding author.State Key Laboratory of Intelligent Construction and Healthy Operation & Maintenance of Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation & Maintenance of Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaThe thermal conductivity of soil is a key factor influencing the heat transfer process and temperature distribution, which has significant implications for the design and implementation of freezing methods in geotechnical engineering. To address the challenge of freezing the deeply buried sandy clay layer using the freezing method in the drilling wells of the Huainan-Huaibei mining area, experimental research was conducted on the thermal conductivity of sandy clay and its microstructure. Utilizing the transient plane source method, variations in thermal conductivity with water content, dry density, sand content, and temperature were observed, revealing the patterns and mechanisms underlying these changes. The findings indicate that the thermal conductivity of frozen sandy clay mainly undergoes three stages of temperature variation. During the rapid increase phase (Ⅱ), the thermal conductivity rises sharply with decreasing temperature, exhibiting a “leap” trend. As the water content increases, the range of the thermal conductivity leap gradually narrows. When the water content increases from 15 % to 22.5 %, the corresponding leap range decreases to 0 ∼ -5℃. Microstructural parameters quantitatively reflect the intrinsic reasons for changes in soil thermal conductivity from a microscopic perspective, indicating that these characteristics significantly affect its thermal conductivity.http://www.sciencedirect.com/science/article/pii/S0038080624001434Thermal conductivityMicroscopic characterizationSand contentArtificial frozen soilDeep buried strataSandy clay |
| spellingShingle | Yi Cao Yansen Wang Chuanxin Rong Hao Li Bin Wang Xin Shi Jie Zhang Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation Soils and Foundations Thermal conductivity Microscopic characterization Sand content Artificial frozen soil Deep buried strata Sandy clay |
| title | Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation |
| title_full | Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation |
| title_fullStr | Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation |
| title_full_unstemmed | Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation |
| title_short | Experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation |
| title_sort | experimental study on thermal conductivity and microscopic characterization of sandy clay in deep buried formation |
| topic | Thermal conductivity Microscopic characterization Sand content Artificial frozen soil Deep buried strata Sandy clay |
| url | http://www.sciencedirect.com/science/article/pii/S0038080624001434 |
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