Study on the dynamic mechanism of soil desiccation cracking by surface strain/displacement analysis

Tang, Chaosheng; Cheng, Qiuming; Lin, Luan; Tian, Bingchuan; Zhou, Hao; Shi, Bin

doi:10.1016/j.compgeo.2022.104998

Cited by 12 publications

(3 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Image Processingmentioning

confidence: 99%

“…In the fifth step, the fracture skeleton of the denoised binary image was extracted to obtain a fracture network with a width of 1 pixel. The burr on the bone, which was the noise generated during skeletonization, was removed (Figure 4e [43,44]. The crack rate was defined as the ratio of the number of black pixels to the total number of pixels in the denoised binary image.…”

Section: Image Processingmentioning

confidence: 99%

See 1 more Smart Citation

Structural and Fractal Analysis of Soil Cracks Due to the Roots of Setaria Viridis

et al. 2022

View full text Add to dashboard Cite

Soil surfaces form complex crack networks as a result of water loss and shrinkage. A crack network destroys the integrity of the soil and becomes the main factor affecting rainfall infiltration, slope instability and soil integrity. In this paper, a soil fracture network is quantified using fractal characteristics and fractal dimensions, and the soil fracture network is identified and calculated using digital image processing technology. The fracture network of silty clay with different setaria viridis root content is studied during the process of evaporation. Saturated mud is prepared by taking soil samples and collecting setaria viridis roots. The content of setaria viridis roots in each saturated mud sample is 0 g, 0.1 g, 0.2 g and 0.3 g. In the artificial climate environment simulation system, thin-layer root soil is dried by controlling the temperature and humidity to simulate dry climate conditions. During the test, the crack development process is recorded using a digital camera. The results show that when the root content is 0, 0.1 g, 0.2 g and 0.3 g, the water content values when a fissure is generated are 35.2%, 41.2%, 42% and 46.4%, and the initial fractal dimension values are 1.100, 1.106, 1.112 and 1.115, respectively. The fractal dimension value increases rapidly in the early stage of fissure generation, and it reaches the maximum value when the water content reaches 13.66%, 15.2%, 15.66% and 17.98%, respectively. According to the change law of the fractal dimension, the fractal dimension increases rapidly following the initial appearance of the fracture, and, with a continuous reduction in water content in the later stage, the fracture characteristics gradually stabilize, and the change rate of the fractal dimension becomes slow.

show abstract

Section: Image Processingmentioning

confidence: 99%

Section: Image Processingmentioning

confidence: 99%

Structural and Fractal Analysis of Soil Cracks Due to the Roots of Setaria Viridis

et al. 2022

View full text Add to dashboard Cite

show abstract

“…After capturing images of soil surface by a high-resolution camera at certain time intervals to track the spatiotemporal evolution of crack morphology, Liu et al [27] computed crack area ratio, average crack length, and total crack length of soil samples and analyzed the effect of bottom ash on crack characteristics to explore the possibility of recycled usage of bottom ash for soil improvement. Tang et al [28] used a digital camera to record the dynamic process of soil desiccation cracks in real-time, they also pointed out that digital image processing technique can effectively obtain the soil deformation without disturbing the soil sample, which offers an available way for understanding the intrinsic dynamic mechanisms of soil desiccation cracking. Taheri and El-Zein [29] also tracked surface cracking with a digital camera in real-time, their captured photos were then analyzed by image processing to quantify crack ratio and surface area of soil clods.…”

Section: Introductionmentioning

confidence: 99%

Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China

Zhang

Ren

et al. 2023

Agriculture

View full text Add to dashboard Cite

The surface of cohesive soda saline-alkali soil in the Songnen Plain of China exhibits obvious desiccation cracking phenomenon during water evaporation. Quantitative research on the process and influencing factors of desiccation cracking are significant for determining the mechanical properties of salt-affected soil, improving the salinization status and the local ecological environment. This study aims to conduct laboratory-controlled cracking experiments on soda saline-alkali soils, and to regularly measure the soil moisture and the cracking status of 40 soil samples. After processing the crack images uniformly, crack characteristics including crack length, crack area, contrast texture feature, and box-counting fractal dimension are extracted. The results indicate that the decrease in soil moisture can be divided into three stages such as fast evaporation stage, slow evaporation stage and stable evaporation stage, and that the evaporation rate shows a linear negative correlation with soil salinity. The measurements also indicate that crack length rapidly increases and reaches stability with a decrease in water content compared with the crack area. The high correlation between different crack characteristics and the soil total salinity (correlation coefficient from 0.44 to 0.95) shows that salt content is the dominant factor affecting the desiccation cracking of soda saline-alkali soil. A multiple linear regression prediction model was finally established based on crack characteristics for different salinity parameters with high prediction accuracy for Na+, EC and total salinity (R2 > 0.91 and RPD > 2.5) and also certain prediction accuracy for Cl− and CO32− (R2 > 0.66 and RPD > 1.5).

show abstract

Morphological characteristics of desiccation-induced cracks in cohesive soils: a critical review

Yin

Vanapalli

2022

Bull Eng Geol Environ

View full text Add to dashboard Cite

Study on the dynamic mechanism of soil desiccation cracking by surface strain/displacement analysis

Cited by 12 publications

References 61 publications

Structural and Fractal Analysis of Soil Cracks Due to the Roots of Setaria Viridis

Structural and Fractal Analysis of Soil Cracks Due to the Roots of Setaria Viridis

Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China

Morphological characteristics of desiccation-induced cracks in cohesive soils: a critical review

Contact Info

Product

Resources

About