Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities
In order to guarantee perpendicularity of rotary cast-in-place pile in Karst areas, filling, like sand, etc., is commonly used between the inner steel casing and the outer steel sleeve; while the outer steel sleeve is pulled out or a vertical load is applied on the top of the pile, the sand will mov...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/2249766 |
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| author | Rui Luo Fangcai Zhu Qing Liu Shaolong Zhang Binbin Wu Yaxin Shang Qi Chen |
| author_facet | Rui Luo Fangcai Zhu Qing Liu Shaolong Zhang Binbin Wu Yaxin Shang Qi Chen |
| author_sort | Rui Luo |
| collection | DOAJ |
| description | In order to guarantee perpendicularity of rotary cast-in-place pile in Karst areas, filling, like sand, etc., is commonly used between the inner steel casing and the outer steel sleeve; while the outer steel sleeve is pulled out or a vertical load is applied on the top of the pile, the sand will move, contact, and push against each other, which leads to recrushing; therefore, shear characteristics and secondary breakage are a meaningful problem to study with regard to the influence of different sand densities. Through experimental direct shear tests, with different dry densities, shear stress versus shear displacement curves are obtained and internal friction angles are analyzed. The results show that internal friction angles increase along with increment of dry densities; more interesting is that the secondary breakage ratio also increases. A comparative numerical 2D model is set up using PFC2D, with lower porosity used to simulate a large dry density, and similar results are obtained, that is to say, with increase of dry densities, internal friction angles also increase. |
| format | Article |
| id | doaj-art-1a168c39c7ef4e6cb42ee064b42b2a52 |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-1a168c39c7ef4e6cb42ee064b42b2a522025-02-03T01:22:53ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/2249766Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry DensitiesRui Luo0Fangcai Zhu1Qing Liu2Shaolong Zhang3Binbin Wu4Yaxin Shang5Qi Chen6School of Civil EngineeringSchool of Civil EngineeringSchool of Civil Engineering2nd Engineering Co. Ltd.2nd Engineering Co. Ltd.2nd Engineering Co. Ltd.2nd Engineering Co. Ltd.In order to guarantee perpendicularity of rotary cast-in-place pile in Karst areas, filling, like sand, etc., is commonly used between the inner steel casing and the outer steel sleeve; while the outer steel sleeve is pulled out or a vertical load is applied on the top of the pile, the sand will move, contact, and push against each other, which leads to recrushing; therefore, shear characteristics and secondary breakage are a meaningful problem to study with regard to the influence of different sand densities. Through experimental direct shear tests, with different dry densities, shear stress versus shear displacement curves are obtained and internal friction angles are analyzed. The results show that internal friction angles increase along with increment of dry densities; more interesting is that the secondary breakage ratio also increases. A comparative numerical 2D model is set up using PFC2D, with lower porosity used to simulate a large dry density, and similar results are obtained, that is to say, with increase of dry densities, internal friction angles also increase.http://dx.doi.org/10.1155/2022/2249766 |
| spellingShingle | Rui Luo Fangcai Zhu Qing Liu Shaolong Zhang Binbin Wu Yaxin Shang Qi Chen Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities Geofluids |
| title | Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities |
| title_full | Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities |
| title_fullStr | Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities |
| title_full_unstemmed | Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities |
| title_short | Experimental and Numerical Simulation Study on Shear Strength and Secondary Particle Breakage of Coarse Sand with Different Dry Densities |
| title_sort | experimental and numerical simulation study on shear strength and secondary particle breakage of coarse sand with different dry densities |
| url | http://dx.doi.org/10.1155/2022/2249766 |
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