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Quantitative Analysis and Application of NMR T2 Spectrum of Loess Under Dry-wet Cycles Conditions
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Jian-hong MA, Wen SUN, Na XU, Jin-wen XING, Wen-dong MA, Hao-chen SUN
Water Resources and Power | 2023, 41(12) : 168 - 172
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Water Resources and Power | 2023, 41(12): 168-172
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Quantitative Analysis and Application of NMR T2 Spectrum of Loess Under Dry-wet Cycles Conditions
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Jian-hong MA, Wen SUN, Na XU, Jin-wen XING, Wen-dong MA, Hao-chen SUN
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  • School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
Published: 2023-12-25 doi: 10.20040/j.cnki.1000-7709.2023.20230120
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In order to explore the impact of moisture change on the pore structure of reshaped loess, different times of humidification-dehumidification cycle tests were carried out for remodeled loess with different dry densities, and the pore structure inside the soil under different cycles was tested by nuclear magnetic resonance technology. The results show that the NMR T2 pattern of reshaped loess presents a bimodal structure, that is, the sample contains two pore structures; The dry and wet cycles have an impact on the change of the pore structure of the loess, and the pore structure shows different laws under different times of dry and wet cycles. Finally, based on the quantitative parameters extracted from the T2 pattern, the permeability of reshaped loess under different cycles were calculated by SDR permeability model, and the permeability mechanism of loess was explained from the microscopic aspect.

dry-wet cycle  /  NMR  /  quantitative parameters  /  pore structure  /  SDR permeability model
Jian-hong MA, Wen SUN, Na XU, Jin-wen XING, Wen-dong MA, Hao-chen SUN. Quantitative Analysis and Application of NMR T2 Spectrum of Loess Under Dry-wet Cycles Conditions[J]. Water Resources and Power, 2023 , 41 (12) : 168 -172 . DOI: 10.20040/j.cnki.1000-7709.2023.20230120
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Year 2023 volume 41 Issue 12
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doi: 10.20040/j.cnki.1000-7709.2023.20230120
  • Receive Date：2023-02-02
  • Online Date：2026-01-28
  • Published：2023-12-25
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  • Received：2023-02-02
  • Revised：2023-04-10
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    School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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