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| Resistivity testing and calculation method of saturated sand during liquefaction |
| School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China |
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Abstract To apply the resistivity testing to the laboratory test of sand liquefaction, a resistivity testing device with dynamic triaxial test was investigated and developed. The resistivity calculation methods of saturated sand samples under cyclic loading were analyzed, and two resistivity calculation models of constant diameter model and cosine model were proposed. The results show that the cosine model is more consistent with the actual deformation of sample, and the calculation results are more reliable. The resistivity of saturated sand generally shows downward tendency during liquefaction. After the initial liquefaction, when the resistivity of saturated sand is at the peak value stage, the dynamic pore pressure is almost decreased, which illuminates that the soil appears a certain degree of dilatancy characteristics.
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Received: 15 June 2020
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| ［1］ |
CHANG C S, HICHER P Y. An elasto-plastic model for granular materials with microstructural consideration[J]. International Journal of Solids and Structures, 2005, 42(14): 4258-4277.
|
| ［2］ |
YIN Z Y, CHANG C S, HICHER P Y. Micromechanical modelling for effect of inherent anisotropy on cyclic behaviour of sand[J]. International Journal of Solids and Structures, 2010, 47(14/15):1933-1951.
|
| ［3］ |
魏星,张昭,王刚,等.饱和砂土液化后大变形机制的离散元细观分析[J].岩土力学,2019,40(4):1596-1602,1625.
|
|
WEI X, ZHANG Z, WANG G, et al. DEM study of mechanism of large post-liquefaction deformation of saturated sand[J]. Rock and Soil Mechanics, 2019, 40(4):1596-1602, 1625. (in Chinese)
|
| ［4］ |
周健,史旦达,吴峰,等.基于数字图像技术的砂土液化可视化动三轴试验研究[J]. 岩土工程学报, 2011, 33(1):81-87.
|
|
ZHOU J, SHI D D, WU F, et al. Visualized cyclic tria-xial tests on sand liquefaction using digital imaging technique[J]. Chinese Journal of Geotechnical Enginee-ring, 2011, 33(1):81-87. (in Chinese)
|
| ［5］ |
KOWALCZYK S, MA?LAKOWSKI M, TUCHOLKA P. Determination of the correlation between the electrical resistivity of non-cohesive soils and the degree of compaction[J]. Journal of Applied Geophysics, 2014, 110: 43-50.
|
| ［6］ |
杨志浩,岳祖润,冯怀平.非饱和粉土路基内水分迁移规律试验研究[J].岩土力学,2020, 41(7):1-11.
|
|
YANG Z H, YUE Z R, FENG H P. Experimental study on moisture migration properties in unsaturated silty subgrade[J]. Rock and Soil Mechanics, 2020, 41(7):1-11.(in Chinese)
|
| ［7］ |
查甫生,刘松玉,杜延军,等.基于电阻率的非饱和土基质吸力预测[J].岩土力学, 2010, 31(3):1003-1008.
|
|
ZHA F S，LIU S Y，DU Y J，et al. Prediction of matric suction of unsaturated soil based on electrical resistivity[J]. Rock and Soil Mechanics, 2010, 31(3):1003-1008.(in Chinese)
|
| ［8］ |
查甫生,刘晶晶,许龙,等.水泥·粉煤灰固化/稳定重金属污染土的电阻率特性试验研究[J].岩土力学,2019,40(12):4573-4580，4606.
|
|
ZHA F S, LIU J J, XU L, et al. Electrical resistivity of heavy metal contaminated soils solidified/stabilized with cement-fly ash[J]. Rock and Soil Mechanics,2019,40(12):4573-4580，4606.(in Chinese)
|
| ［9］ |
邹海峰,刘松玉,蔡国军,等.基于电阻率CPTU的饱和砂土液化势评价研究[J].岩土工程学报,2013,35(7):1280-1288.
|
|
ZOU H F, LIU S Y, CAI G J, et al. Evaluation of li-quefaction potential of saturated sands based on piezocome penetration tests on resistivity[J].Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1280-1288. (in Chinese)
|
| ［10］ |
段伟,蔡国军,刘松玉,等.无黏性土的电阻率CPTU状态参数确定方法及其液化评价[J].交通运输工程学报, 2019, 19(2):59-68.
|
|
DUAN W, CAI G J, LIU S Y, et al. Determining me-thod of cohesionless soil state parameter based on resisti-vity CPTU and liquefaction evaluation[J].Journal of Traffic and Transportation Engineering, 2019, 19(2):59-68. (in Chinese)
|
| ［11］ |
JINGUUJI M, TOPRAK S, KUNIMATSU S. Visualization technique for liquefaction process in chamber expe-riments by using electrical resistivity monitoring[J]. Soil Dynamics and Earthquake Engineering, 2007, 27(3):191-199.
|
| ［12］ |
王炳辉.在动三轴中实现电阻率测试的装置:中国,201820109496.X[P]. 2018-12-11.
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2022, Vol. 43 
