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Study on Particle-Size Process on Internal Erosion of Grap-Graded Soil--Rock Mixtures of Different Fine Contents
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  • Zhilin Cao,
  • Weichen Sun,
  • qiang xie,
  • Zhihui Wu,
  • Xiang Fu,
  • Dalang Tian
Zhilin Cao
Chongqing University

Corresponding Author:[email protected]

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Weichen Sun
Chongqing University
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qiang xie
Chongqing University
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Zhihui Wu
Chongqing University
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Xiang Fu
Chongqing Jiaotong University
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Dalang Tian
Chongqing University
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Soil–rock mixtures are widely encountered in geotechnical engineering projects. The instability and failure mechanism of grap-graded soil–rock mixtures under rainfall conditions has always been the focus of geological disaster research. To deeply explore the mechanism of seepage deformation of soil–rock mixtures, an indoor physical permeability test that considers soil–rock mixtures with different fine contents was conducted, and a particle-scale numerical simulation test of the permeability evolution was carried out using the coupling model of PFC3D and ABAQUS. The test results showed that the spatial distribution of fine particle loss along the height direction could be divided into three areas: top loss, middle uniform, and bottom loss area. The “island” effect of coarse particles, which is caused by excessive fine content and makes the fine particles bear more load, was eliminated with the loss of fine particles. In this preset working condition of coarse and fine particle diameters, setting FC to 35% may be the best way to fill the voids between the coarse particles. Particle migration leads to a change in the load-bearing skeleton structure, thereby causing seepage deformation. Therefore, the particle-scale numerical test method can better reproduce the seepage deformation process of grap-graded soil–rock mixtures.
26 Oct 2021Submitted to Hydrological Processes
28 Oct 2021Submission Checks Completed
28 Oct 2021Assigned to Editor
28 Oct 2021Reviewer(s) Assigned
06 Dec 2021Review(s) Completed, Editorial Evaluation Pending
07 Dec 2021Editorial Decision: Revise Major
20 Jan 20221st Revision Received
20 Jan 2022Submission Checks Completed
20 Jan 2022Assigned to Editor
20 Jan 2022Reviewer(s) Assigned
07 Mar 2022Review(s) Completed, Editorial Evaluation Pending
23 Mar 2022Editorial Decision: Revise Major
02 Jun 20222nd Revision Received
04 Jun 2022Assigned to Editor
04 Jun 2022Submission Checks Completed
04 Jun 2022Reviewer(s) Assigned
23 Jun 2022Review(s) Completed, Editorial Evaluation Pending
29 Jun 2022Editorial Decision: Accept