Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures
With the steady development of the development of the western region in China, the construction of mountain highways has developed rapidly, and the soil-rock mixed filler, as an excellent filler, is widely used in the subgrade filling of mountain highways. Unlike ordinary fine-grained soil, the sour...
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8850221 |
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| author | Zhuoling He Junyun Zhang Tao Sun |
| author_facet | Zhuoling He Junyun Zhang Tao Sun |
| author_sort | Zhuoling He |
| collection | DOAJ |
| description | With the steady development of the development of the western region in China, the construction of mountain highways has developed rapidly, and the soil-rock mixed filler, as an excellent filler, is widely used in the subgrade filling of mountain highways. Unlike ordinary fine-grained soil, the source of the soil-rock mixtures (S-RMs) is not unique, and the particle size difference is large and the water content is not uniform, resulting in very complicated mechanical properties. But the current highway embankment codes are still mainly established on the fine-grained soil. It is not fully applicable to soil-rock filled embankment. Based on soil-rock filled embankment engineering practice, this research uses a large-scale direct shear test to research the mechanical characteristics of the S-RMs with different maximum particle diameters. According to the large-scale direct shear test of S-RMs with different maximum particle diameters, the shear displacement vs shear stress curve, shear dilation, and strength characteristics with maximum particle diameter were analyzed. Results demonstrate that whether secondary hardening occurs mainly depends on the normal stress and the maximum particle diameter of the filler. At different maximum particle diameters, the horizontal displacement vs vertical displacement curves of the S-RMs can be roughly divided into continuous shearing and beginning of shearing and quick dilation. And the shear strength increases with the increase of the maximum particle diameter. Moreover, the cohesion decreases first and then increases with the increase of the maximum particle diameter, and the internal friction angle increases with the increase of the maximum particle diameter. Therefore, some RBs with large particle diameter added to filler can effectively improve the shear strength of the S-RMs, which may be valuable for realistic engineering. |
| format | Article |
| id | doaj-art-7febda6e602f4ae3bcb9f85bd8b26a7a |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
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| series | Advances in Civil Engineering |
| spelling | doaj-art-7febda6e602f4ae3bcb9f85bd8b26a7a2025-08-20T03:35:19ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88502218850221Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock MixturesZhuoling He0Junyun Zhang1Tao Sun2School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaChina Tiesiju Civil Engineering Group Co. Ltd., Hefei 610031, ChinaWith the steady development of the development of the western region in China, the construction of mountain highways has developed rapidly, and the soil-rock mixed filler, as an excellent filler, is widely used in the subgrade filling of mountain highways. Unlike ordinary fine-grained soil, the source of the soil-rock mixtures (S-RMs) is not unique, and the particle size difference is large and the water content is not uniform, resulting in very complicated mechanical properties. But the current highway embankment codes are still mainly established on the fine-grained soil. It is not fully applicable to soil-rock filled embankment. Based on soil-rock filled embankment engineering practice, this research uses a large-scale direct shear test to research the mechanical characteristics of the S-RMs with different maximum particle diameters. According to the large-scale direct shear test of S-RMs with different maximum particle diameters, the shear displacement vs shear stress curve, shear dilation, and strength characteristics with maximum particle diameter were analyzed. Results demonstrate that whether secondary hardening occurs mainly depends on the normal stress and the maximum particle diameter of the filler. At different maximum particle diameters, the horizontal displacement vs vertical displacement curves of the S-RMs can be roughly divided into continuous shearing and beginning of shearing and quick dilation. And the shear strength increases with the increase of the maximum particle diameter. Moreover, the cohesion decreases first and then increases with the increase of the maximum particle diameter, and the internal friction angle increases with the increase of the maximum particle diameter. Therefore, some RBs with large particle diameter added to filler can effectively improve the shear strength of the S-RMs, which may be valuable for realistic engineering.http://dx.doi.org/10.1155/2020/8850221 |
| spellingShingle | Zhuoling He Junyun Zhang Tao Sun Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures Advances in Civil Engineering |
| title | Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures |
| title_full | Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures |
| title_fullStr | Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures |
| title_full_unstemmed | Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures |
| title_short | Influence of Maximum Particle Diameter on the Mechanical Behavior of Soil-Rock Mixtures |
| title_sort | influence of maximum particle diameter on the mechanical behavior of soil rock mixtures |
| url | http://dx.doi.org/10.1155/2020/8850221 |
| work_keys_str_mv | AT zhuolinghe influenceofmaximumparticlediameteronthemechanicalbehaviorofsoilrockmixtures AT junyunzhang influenceofmaximumparticlediameteronthemechanicalbehaviorofsoilrockmixtures AT taosun influenceofmaximumparticlediameteronthemechanicalbehaviorofsoilrockmixtures |