TY - JOUR
T1 - 3D characterization of desiccation cracking in clayey soils using a structured light scanner
AU - Zhuo, Zhuang
AU - Zhu, Cheng
AU - Tang, Chao Sheng
AU - Xu, Hao
AU - Shi, Xiangchao
AU - Mark, Vail
N1 - Funding Information:
This research is supported by Open Fund ( PLN201801 ) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ( Southwest Petroleum University ). The authors also acknowledge the funding support from Rowan Camden Health Research Initiative. Undergraduate students at Rowan University, including David Spell, Joseph Goodberlet, Mitchell Myers, Lauren Blaze, Amanda Groschadl, and Jiwon Yang, have assisted the authors in laboratory work. Permission to publish this work was granted by the Director of Rowan University's Center for Research and Education in Advanced Transportation Engineering Systems (CREATEs).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/3/20
Y1 - 2022/3/20
N2 - To capture the 3D morphological features of drying soils, we explore the potential of using a structured light scanner. Bentonite clay is used for desiccation tests. Both 2D images and 3D scans are obtained at certain time intervals throughout the test. We develop a post-processing methodology to quantify the 2D and 3D features of soil cracking, including surface crack ratio, total volume, surface area, and fractal dimension. Experimental results validate that the structured light scanner enables 3D high-resolution and accurate scanning of the soil desiccation cracking patterns. The change of 3D soil volume is more influenced by the widening of desiccation cracks, with slower soil volume reduction corresponding to the moment when primary cracks propagate vertically downwards. The spatiotemporal evolution of 3D reconstructed model indicates that the soil surface shrinks first, more in the central region and less along the boundaries due to the boundary constraint, before crack initiates and propagates. Both surface area and fractal dimension increase monotonically before the evaporation stops, with both more susceptible to the change of crack depth rather than crack width. Through presenting a new approach for soil desiccation cracking analysis, this study is expected to provide new insights into the soil desiccation process.
AB - To capture the 3D morphological features of drying soils, we explore the potential of using a structured light scanner. Bentonite clay is used for desiccation tests. Both 2D images and 3D scans are obtained at certain time intervals throughout the test. We develop a post-processing methodology to quantify the 2D and 3D features of soil cracking, including surface crack ratio, total volume, surface area, and fractal dimension. Experimental results validate that the structured light scanner enables 3D high-resolution and accurate scanning of the soil desiccation cracking patterns. The change of 3D soil volume is more influenced by the widening of desiccation cracks, with slower soil volume reduction corresponding to the moment when primary cracks propagate vertically downwards. The spatiotemporal evolution of 3D reconstructed model indicates that the soil surface shrinks first, more in the central region and less along the boundaries due to the boundary constraint, before crack initiates and propagates. Both surface area and fractal dimension increase monotonically before the evaporation stops, with both more susceptible to the change of crack depth rather than crack width. Through presenting a new approach for soil desiccation cracking analysis, this study is expected to provide new insights into the soil desiccation process.
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U2 - 10.1016/j.enggeo.2022.106566
DO - 10.1016/j.enggeo.2022.106566
M3 - Article
AN - SCOPUS:85124666669
VL - 299
JO - Engineering Geology
JF - Engineering Geology
SN - 0013-7952
M1 - 106566
ER -