Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method
Alluvial-diluvial deposit (ADSRM) is a special soil-rock mixture, which is composed of gravels, boulders, pebbles, and fine-grained soils carried by rivers or temporary floods. Its mechanical properties are quite different from regular soils and rocks. Based on the investigation results of alluvial-...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522008269 |
| _version_ | 1797988193761492992 |
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| author | Longqi Liu Yunshu Yang Xuesong Mao Menglan Nie |
| author_facet | Longqi Liu Yunshu Yang Xuesong Mao Menglan Nie |
| author_sort | Longqi Liu |
| collection | DOAJ |
| description | Alluvial-diluvial deposit (ADSRM) is a special soil-rock mixture, which is composed of gravels, boulders, pebbles, and fine-grained soils carried by rivers or temporary floods. Its mechanical properties are quite different from regular soils and rocks. Based on the investigation results of alluvial-diluvial deposits in Luonan, Shaanxi Province, China, and the theory of the N-method, the shear mechanical properties of ADSRM samples with different N-values were analyzed using large-scale direct shear tests and image processing technology (IPP). Investigation results show that alluvial-diluvial deposits in the Luonan area are widely distributed, and most of complex origins and structures. The fractal dimension values of ADSRM samples only have one scale range of particle size and decrease with the increasing n value. The equivalent cohesion, internal friction angle, shear strength, and dilation value of the ADSRM sample with n = 0.55 are higher than those of other samples. The proportion of pore area, pore abundance, total crushing area, the fractal dimension of rock block contour, and equivalent diameter and abundance of rock blocks were used to characterize the pores and rock block morphology on the shear plane. The shape of most pores on the shear plane is oblate, secondly near-equiaxed, and the least long-strip. The crushing area of rock blocks on the shear plane of n = 0.55 sample is the highest, and the shape of most rock blocks is oblate and tends to develop to near-equiaxed. In summary, the macro-meso shear properties and engineering characteristics of the n = 0.55 sample are better than those of other samples designed by the N-method. |
| first_indexed | 2024-04-11T07:58:59Z |
| format | Article |
| id | doaj.art-4136fe5bc4904fc9aed6ff9ffbf84f60 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-11T07:58:59Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-4136fe5bc4904fc9aed6ff9ffbf84f602022-12-22T04:35:47ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01694Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-methodLongqi Liu0Yunshu Yang1Xuesong Mao2Menglan Nie3Transportation Institute, Inner Mongolia University, No.49 Xilin Gol South Road, Yuquan District, 010020 Hohhot, Inner Mongolia, ChinaTransportation Institute, Inner Mongolia University, No.49 Xilin Gol South Road, Yuquan District, 010020 Hohhot, Inner Mongolia, ChinaSchool of Highway, Chang’an University, Middle-section of Nan’er Huan Road, 710064 Xi’an City, Shaanxi Province, China; Corresponding author.Department of Architectural Engineering, Shandong Modern University, No. 20288 Jingshidong Road, 250002 Jinan City, Shandong Province, ChinaAlluvial-diluvial deposit (ADSRM) is a special soil-rock mixture, which is composed of gravels, boulders, pebbles, and fine-grained soils carried by rivers or temporary floods. Its mechanical properties are quite different from regular soils and rocks. Based on the investigation results of alluvial-diluvial deposits in Luonan, Shaanxi Province, China, and the theory of the N-method, the shear mechanical properties of ADSRM samples with different N-values were analyzed using large-scale direct shear tests and image processing technology (IPP). Investigation results show that alluvial-diluvial deposits in the Luonan area are widely distributed, and most of complex origins and structures. The fractal dimension values of ADSRM samples only have one scale range of particle size and decrease with the increasing n value. The equivalent cohesion, internal friction angle, shear strength, and dilation value of the ADSRM sample with n = 0.55 are higher than those of other samples. The proportion of pore area, pore abundance, total crushing area, the fractal dimension of rock block contour, and equivalent diameter and abundance of rock blocks were used to characterize the pores and rock block morphology on the shear plane. The shape of most pores on the shear plane is oblate, secondly near-equiaxed, and the least long-strip. The crushing area of rock blocks on the shear plane of n = 0.55 sample is the highest, and the shape of most rock blocks is oblate and tends to develop to near-equiaxed. In summary, the macro-meso shear properties and engineering characteristics of the n = 0.55 sample are better than those of other samples designed by the N-method.http://www.sciencedirect.com/science/article/pii/S2214509522008269Alluvial-diluvial soil-rock mixture (ADSRM)Field investigationN-methodMacro-meso shear propertiesShear planeIPP |
| spellingShingle | Longqi Liu Yunshu Yang Xuesong Mao Menglan Nie Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method Case Studies in Construction Materials Alluvial-diluvial soil-rock mixture (ADSRM) Field investigation N-method Macro-meso shear properties Shear plane IPP |
| title | Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method |
| title_full | Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method |
| title_fullStr | Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method |
| title_full_unstemmed | Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method |
| title_short | Macro-meso shear properties of alluvial-diluvial soil-rock mixture (ADSRM) subgrade fillers based on field investigation and N-method |
| title_sort | macro meso shear properties of alluvial diluvial soil rock mixture adsrm subgrade fillers based on field investigation and n method |
| topic | Alluvial-diluvial soil-rock mixture (ADSRM) Field investigation N-method Macro-meso shear properties Shear plane IPP |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522008269 |
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