Journal of Glaciology and Geocryology

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Analysis on the influence of cyclic stress ratio and vibration frequency on microstructure of saline soil

Futang ZHAO, Lijun CHANG, Wuyu ZHANG

Journal of Glaciology and Geocryology, 2020, 42(3): 854-864. DOI: 10.7522/j.issn.1000-0240.2020.0065

Fig.10 Pore accumulation curves under different cyclic stress ratios （a） and vibration frequencies （b）

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Table 1 Basic physical parameters of the saline soil
Fig.1 Particle grading distribution curve of the soil sample
Table 2 Type and content of salt ions in saline soil
Fig.2 XRD Spectral line of the saline soil
Fig.3 The bidirectional triaxial test system of GDS
Table 3 Test plan parameters setting
Fig.4 The relationship between the axial dynamic strain ε_d and the number of cycles N for different cyclic stress ratios （a） and different vibration frequencies （b）
Fig.5 Typical failure characteristics of the specimens
Fig.6 Photo showing the JSM-6610LV scanning electron microscope
Fig.7 Typical SEM images of specimens before and after loading
Fig.8 Binarized SEM images
Fig.9 Vectorized SEM images
Fig.11 Histogram of pore content in various scales before and after cyclic dynamic loading changing with cycle stress ratio （a） and vibration frequency （b）
Fig.12 Porosity fractal dimension changing with cycle stress ratio （a） and vibration frequency （b）
Fig.13 Probability entropy changing with cyclic stress ratio （a） and vibration frequency （b）
Fig.14 Rose diagrams before and after loading
Fig.15 Morphological fractal dimension changing with cycle stress ratio （a） and vibration frequency （b）
Fig.16 Average shape factor changing with cycle stress ratio （a） and vibration frequency （b）
Fig.17 Pore shape coefficient changing with cyclic stress ratios （a） and vibration frequency （b）

模态框（Modal）标题

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