Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil
Over prolonged service periods, reinforced gravel soil subgrades are susceptible to deterioration in interfacial mechanical properties due to the intrusion of fine particles. However, few studies focus on the interface of fine-grained polluted soil. To study the effect of fine particle content on th...
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| Format: | Article |
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Editorial Office of Hydrogeology & Engineering Geology
2025-07-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202402009 |
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| _version_ | 1839625155095035904 |
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| author | Jiaquan WANG Hong LIN Yi TANG Ying TANG |
| author_facet | Jiaquan WANG Hong LIN Yi TANG Ying TANG |
| author_sort | Jiaquan WANG |
| collection | DOAJ |
| description | Over prolonged service periods, reinforced gravel soil subgrades are susceptible to deterioration in interfacial mechanical properties due to the intrusion of fine particles. However, few studies focus on the interface of fine-grained polluted soil. To study the effect of fine particle content on the shear performance of gravelly soil, a series of direct shear tests of reinforced gravelly soil with different fine particle contents were carried out. The impacts of four different fine particle contents (0%, 10%, 20%, 30%) and three normal stresses (40, 60, 80 kPa) on the shear characteristics of the geogrid-gravel soil interface were analyzed, and the empirical formula of interfacial shear expansion coefficient was established. Results indicate that the shear stress-displacement curves of the reinforced gravelly soil direct shear tests are all of the stress softening type. With the increase in the fine particle content, parameters of peak strength and shear strength show an initial increase followed by a decrease trend. The particle interlocking force of well graded gravel soil is strong, which manifests as a high apparent cohesion in macroscopical. The dilatancy curve shows relative shear contraction, relative dilatancy, and relative shear contraction stages, and the occurrence of the maximum value of relative shear dilatation lags behind. The maximum dilation angle is closely associated with the peak shear strength. Through the dilation coefficient model, it is found that the smaller the fine particle content and normal stress are, the stronger the interfacial dilation is. This study can provide theoretical guidance for strength design and degradation protection of highway engineering. |
| format | Article |
| id | doaj-art-0c8289f38aa145b5864bc8c1711a6e80 |
| institution | Matheson Library |
| issn | 1000-3665 |
| language | zho |
| publishDate | 2025-07-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj-art-0c8289f38aa145b5864bc8c1711a6e802025-07-18T03:29:00ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652025-07-0152426427210.16030/j.cnki.issn.1000-3665.202402009202402009Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soilJiaquan WANG0Hong LIN1Yi TANG2Ying TANG3Guangxi University Key Laboratory of Disaster Prevention and Mitigation and Prestress Technology, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, ChinaGuangxi University Key Laboratory of Disaster Prevention and Mitigation and Prestress Technology, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, ChinaGuangxi University Key Laboratory of Disaster Prevention and Mitigation and Prestress Technology, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, ChinaGuangxi University Key Laboratory of Disaster Prevention and Mitigation and Prestress Technology, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, ChinaOver prolonged service periods, reinforced gravel soil subgrades are susceptible to deterioration in interfacial mechanical properties due to the intrusion of fine particles. However, few studies focus on the interface of fine-grained polluted soil. To study the effect of fine particle content on the shear performance of gravelly soil, a series of direct shear tests of reinforced gravelly soil with different fine particle contents were carried out. The impacts of four different fine particle contents (0%, 10%, 20%, 30%) and three normal stresses (40, 60, 80 kPa) on the shear characteristics of the geogrid-gravel soil interface were analyzed, and the empirical formula of interfacial shear expansion coefficient was established. Results indicate that the shear stress-displacement curves of the reinforced gravelly soil direct shear tests are all of the stress softening type. With the increase in the fine particle content, parameters of peak strength and shear strength show an initial increase followed by a decrease trend. The particle interlocking force of well graded gravel soil is strong, which manifests as a high apparent cohesion in macroscopical. The dilatancy curve shows relative shear contraction, relative dilatancy, and relative shear contraction stages, and the occurrence of the maximum value of relative shear dilatation lags behind. The maximum dilation angle is closely associated with the peak shear strength. Through the dilation coefficient model, it is found that the smaller the fine particle content and normal stress are, the stronger the interfacial dilation is. This study can provide theoretical guidance for strength design and degradation protection of highway engineering.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202402009highway engineeringsoil-reinforcement interfacedirect shear testgravelly soilfine particle contentexpansion coefficient |
| spellingShingle | Jiaquan WANG Hong LIN Yi TANG Ying TANG Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil Shuiwen dizhi gongcheng dizhi highway engineering soil-reinforcement interface direct shear test gravelly soil fine particle content expansion coefficient |
| title | Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil |
| title_full | Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil |
| title_fullStr | Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil |
| title_full_unstemmed | Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil |
| title_short | Effect of fine particle content on shear characteristics of geogrid-reinforced gravelly soil |
| title_sort | effect of fine particle content on shear characteristics of geogrid reinforced gravelly soil |
| topic | highway engineering soil-reinforcement interface direct shear test gravelly soil fine particle content expansion coefficient |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202402009 |
| work_keys_str_mv | AT jiaquanwang effectoffineparticlecontentonshearcharacteristicsofgeogridreinforcedgravellysoil AT honglin effectoffineparticlecontentonshearcharacteristicsofgeogridreinforcedgravellysoil AT yitang effectoffineparticlecontentonshearcharacteristicsofgeogridreinforcedgravellysoil AT yingtang effectoffineparticlecontentonshearcharacteristicsofgeogridreinforcedgravellysoil |