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Visualization on deformation characteristics of passive soil arching effect in unsaturated compacted clay under plane-strain condition.

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Title: Visualization on deformation characteristics of passive soil arching effect in unsaturated compacted clay under plane-strain condition.
Authors: Zhang, Xiao-Hu1,2 (AUTHOR), Wang, Han-Lin1,2,3 (AUTHOR) wanghanlin@hnu.edu.cn, Long, Meng-Cheng1,2 (AUTHOR), Tian, Zhen-Nan1,2 (AUTHOR), Fu, Xiang-Shen1,2 (AUTHOR), Yin, Cheng-Shuang1,2 (AUTHOR)
Source: Bulletin of Engineering Geology & the Environment. Jul2026, Vol. 85 Issue 7, p1-15. 15p.
Abstract: This study presents the deformation characteristics of the passive soil arching effect in unsaturated compacted clay, including the displacement field and strain field. In this study, the displacement field and the strain field during passive soil arching effect were monitored by the DIC system under plane-strain condition. The testing results indicate that the distribution locations and ranges of the disturbed zone (defined in the displacement field), tensile and compressive zones (defined in the strain field) are influenced by the initial placement conditions of the fill. Among them, the pattern of the volumetric strain field reveals that the dilatancy of the fill is mainly caused by the development of the shear bands. The sample with a lower water content or a higher dry density exhibits a larger rigid zone (fill displacement increases at the same rate as the trapdoor). As the trapdoor displacement increases, the stress ratio first increases and then decreases to a stable value, while the shear strain gradually increases. By comparing testing results with those of the passive soil arching effect in sand, the evolutionary characteristics of strain fields of the passive soil arching effect in unsaturated compacted clay are summarized. The comparison results indicate that for samples on both the dry and the wet side, the tensile zones are covered by the shear bands. Meanwhile, the dilative zones are determined by the area where cracks are generated. [ABSTRACT FROM AUTHOR]
Copyright of Bulletin of Engineering Geology & the Environment is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Visualization on deformation characteristics of passive soil arching effect in unsaturated compacted clay under plane-strain condition.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Xiao-Hu%22">Zhang, Xiao-Hu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Han-Lin%22">Wang, Han-Lin</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> wanghanlin@hnu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Long%2C+Meng-Cheng%22">Long, Meng-Cheng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Zhen-Nan%22">Tian, Zhen-Nan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fu%2C+Xiang-Shen%22">Fu, Xiang-Shen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yin%2C+Cheng-Shuang%22">Yin, Cheng-Shuang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Engineering+Geology+%26+the+Environment%22">Bulletin of Engineering Geology & the Environment</searchLink>. Jul2026, Vol. 85 Issue 7, p1-15. 15p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study presents the deformation characteristics of the passive soil arching effect in unsaturated compacted clay, including the displacement field and strain field. In this study, the displacement field and the strain field during passive soil arching effect were monitored by the DIC system under plane-strain condition. The testing results indicate that the distribution locations and ranges of the disturbed zone (defined in the displacement field), tensile and compressive zones (defined in the strain field) are influenced by the initial placement conditions of the fill. Among them, the pattern of the volumetric strain field reveals that the dilatancy of the fill is mainly caused by the development of the shear bands. The sample with a lower water content or a higher dry density exhibits a larger rigid zone (fill displacement increases at the same rate as the trapdoor). As the trapdoor displacement increases, the stress ratio first increases and then decreases to a stable value, while the shear strain gradually increases. By comparing testing results with those of the passive soil arching effect in sand, the evolutionary characteristics of strain fields of the passive soil arching effect in unsaturated compacted clay are summarized. The comparison results indicate that for samples on both the dry and the wet side, the tensile zones are covered by the shear bands. Meanwhile, the dilative zones are determined by the area where cracks are generated. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Bulletin of Engineering Geology & the Environment is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10064-026-05076-x
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      – Code: eng
        Text: English
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            – D: 01
              M: 07
              Text: Jul2026
              Type: published
              Y: 2026
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