Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026948 |
Drought‐induced soil desiccation cracking behavior with consideration of basal friction and layer thickness | |
Hao Zeng; Chao‐; Sheng Tang; Qing Cheng; Cheng Zhu; Li‐; Yang Yin; Bin Shi | |
2020-05-05 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | Drought‐induced cracking of soils is of great concern with the advent of global climate change. The cracking process accelerates the evaporation rate of pore water, lowers the water retention capacity, and degrades the hydraulic‐mechanical properties of soils. Basal friction and layer thickness are two important aspects affecting the subsurface cracking. To explore their detailed effects on soils under drying, we conduct a series of desiccation tests on twelve slurry soil bars and select four types of base materials with different roughness levels and three kinds of layer thicknesses. We track the dynamic cracking process in various samples and adopt the non‐contact optical technique‐Digital Image Correlation (DIC) for the motion of soil particles. Experimental results validate that the coupled effects of basal conditions and soil layer thickness play a key role in governing the soil cracking behavior. The presence of rough bottom surface induces the onset and propagation of desiccation cracks at both top and bottom surfaces. Some of the cracks initiated at the bottom do not propagate through the soil profile. Increasing layer thickness weakens the effect of basal friction on the soil top surface shrinkage, but increases the frictional force acting on the base and results in more crack initiations at the bottom. DIC results further reveal that cracks initiated on the bottom surface and propagated upward vertically are dominated by tensile stresses, while those propagated upward obliquely are dominated by the joint action of shear and tensile stresses. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249135 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Hao Zeng,Chao‐,Sheng Tang,等. Drought‐induced soil desiccation cracking behavior with consideration of basal friction and layer thickness[J]. Water Resources Research,2020. |
APA | Hao Zeng.,Chao‐.,Sheng Tang.,Qing Cheng.,Cheng Zhu.,...&Bin Shi.(2020).Drought‐induced soil desiccation cracking behavior with consideration of basal friction and layer thickness.Water Resources Research. |
MLA | Hao Zeng,et al."Drought‐induced soil desiccation cracking behavior with consideration of basal friction and layer thickness".Water Resources Research (2020). |
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