Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression
Using numerical method to investigate the evolution of micro-structure in unsaturated soil is helpful to explain their physical mechanical. However, the evolution of micro-structure in unsaturated soil is not clear. For this reason, the capillary method is proposed to simulate compression test of un...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Hydrogeology & Engineering Geology
2022-07-01
|
| Series: | Shuiwen dizhi gongcheng dizhi |
| Subjects: | |
| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202110045 |
| _version_ | 1811170252574162944 |
|---|---|
| author | Qiang LI Tonglu LI Hua LI Wei SHEN Ping LI Changliang ZHANG |
| author_facet | Qiang LI Tonglu LI Hua LI Wei SHEN Ping LI Changliang ZHANG |
| author_sort | Qiang LI |
| collection | DOAJ |
| description | Using numerical method to investigate the evolution of micro-structure in unsaturated soil is helpful to explain their physical mechanical. However, the evolution of micro-structure in unsaturated soil is not clear. For this reason, the capillary method is proposed to simulate compression test of unsaturated soil for analyzing soil-water interaction and evolution of pore spaces. In this research, an ideal micro-structure soil model of 540 μm×400 μm is established according to the shape and size of skeleton particles of loess. The capillary method is used to calculate the capillary water distribution and capillary force under different water content(5%, 10%, 18%), and the force then acts on the wetting surface among particles. The loading is applied to the soil sample. The compression test of unsaturated soil is simulated in this research. The simulation results show that the characteristics of compression curve are in good agreement with the experiment data, indicating that the numerical test can reflect the unsaturated soil deformation behavior under the condition of compress. Moreover, the saturation increases and matric suction decreases with the compression of the soil; the saturation increases most at high water content; the matric suction decreases least at middle water content; the deformation pattern is related with the moisture, namely, the pores are mainly shrunk at low water content while mainly disintegrated at high water content. The simulation results are a very useful supplement to laboratory test to explore the deformation mechanism of unsaturated soil. |
| first_indexed | 2024-04-10T16:55:03Z |
| format | Article |
| id | doaj.art-364f678d2bee40d9bb0646e05f33dfc0 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:55:03Z |
| publishDate | 2022-07-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-364f678d2bee40d9bb0646e05f33dfc02023-02-07T08:15:27ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-07-0149413514310.16030/j.cnki.issn.1000-3665.202110045202110045Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compressionQiang LI0Tonglu LI1Hua LI2Wei SHEN3Ping LI4Changliang ZHANG5Department of Geological Engineering and Geomatics, Chang’an University, Xi’an, Shaanxi 710054, ChinaDepartment of Geological Engineering and Geomatics, Chang’an University, Xi’an, Shaanxi 710054, ChinaSchool of Equipment Management and Support, Engineering University of the Chinese People’s Armed Police Force, Xi’an, Shaanxi 710086, ChinaDepartment of Geological Engineering and Geomatics, Chang’an University, Xi’an, Shaanxi 710054, ChinaDepartment of Geological Engineering and Geomatics, Chang’an University, Xi’an, Shaanxi 710054, ChinaDepartment of Geological Engineering and Geomatics, Chang’an University, Xi’an, Shaanxi 710054, ChinaUsing numerical method to investigate the evolution of micro-structure in unsaturated soil is helpful to explain their physical mechanical. However, the evolution of micro-structure in unsaturated soil is not clear. For this reason, the capillary method is proposed to simulate compression test of unsaturated soil for analyzing soil-water interaction and evolution of pore spaces. In this research, an ideal micro-structure soil model of 540 μm×400 μm is established according to the shape and size of skeleton particles of loess. The capillary method is used to calculate the capillary water distribution and capillary force under different water content(5%, 10%, 18%), and the force then acts on the wetting surface among particles. The loading is applied to the soil sample. The compression test of unsaturated soil is simulated in this research. The simulation results show that the characteristics of compression curve are in good agreement with the experiment data, indicating that the numerical test can reflect the unsaturated soil deformation behavior under the condition of compress. Moreover, the saturation increases and matric suction decreases with the compression of the soil; the saturation increases most at high water content; the matric suction decreases least at middle water content; the deformation pattern is related with the moisture, namely, the pores are mainly shrunk at low water content while mainly disintegrated at high water content. The simulation results are a very useful supplement to laboratory test to explore the deformation mechanism of unsaturated soil.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202110045unsaturated soilmicro structurecapillary waterconfined compression testdiscontinuous deformation analysis |
| spellingShingle | Qiang LI Tonglu LI Hua LI Wei SHEN Ping LI Changliang ZHANG Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression Shuiwen dizhi gongcheng dizhi unsaturated soil micro structure capillary water confined compression test discontinuous deformation analysis |
| title | Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression |
| title_full | Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression |
| title_fullStr | Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression |
| title_full_unstemmed | Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression |
| title_short | Numerical analysis of evolution of the unsaturated soil micro-structure with capillary action during compression |
| title_sort | numerical analysis of evolution of the unsaturated soil micro structure with capillary action during compression |
| topic | unsaturated soil micro structure capillary water confined compression test discontinuous deformation analysis |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202110045 |
| work_keys_str_mv | AT qiangli numericalanalysisofevolutionoftheunsaturatedsoilmicrostructurewithcapillaryactionduringcompression AT tongluli numericalanalysisofevolutionoftheunsaturatedsoilmicrostructurewithcapillaryactionduringcompression AT huali numericalanalysisofevolutionoftheunsaturatedsoilmicrostructurewithcapillaryactionduringcompression AT weishen numericalanalysisofevolutionoftheunsaturatedsoilmicrostructurewithcapillaryactionduringcompression AT pingli numericalanalysisofevolutionoftheunsaturatedsoilmicrostructurewithcapillaryactionduringcompression AT changliangzhang numericalanalysisofevolutionoftheunsaturatedsoilmicrostructurewithcapillaryactionduringcompression |