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Published in: Bulletin of Engineering Geology and the Environment 4/2024

01-04-2024 | Original Paper

Study of pore space variation characteristics of soil samples at different depths in loess strata

Authors: Ziyu Wang, Qiang Sun, Nianqin Wang, Hong Ao, Yuan Xin

Published in: Bulletin of Engineering Geology and the Environment | Issue 4/2024

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Abstract

The porosity and permeability characteristics of loess are crucial in studying the soil stability of loess strata. In this paper, porosity and permeability were analyzed by nuclear magnetic resonance (NMR) tests using soils from different depths of loess strata in the same section in the Fugu area. The results show a range in the soil porosity of 15.092~5.190%, with an overall decreasing trend with the increase in depth. The change trend of soil permeability is similar to that of soil porosity. The permeability changes from 0.612 to 0.011 md, and gradually decreases with the increase of depth. The change in porosity is also prominent in the layer with significant permeability changes. Micropores predominate in the loess layer’s pore structure during the loess layer’s compaction process, and the permeability falls as the number of micropores rises. Calcareous nodules are more likely to form in layers with significant permeability changes. The findings of this study have significance in the engineering construction of loess strata in the Loess Plateau area.

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Appendix
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Literature
go back to reference Yang GS, You ZY, Wu D, Zhao LQ (2019) Experimental study on the relationship between pore size distribution and mechanical properties of undisturbed loess under freezing and thawing environment. Coal Eng (3):107–112 Yang GS, You ZY, Wu D, Zhao LQ (2019) Experimental study on the relationship between pore size distribution and mechanical properties of undisturbed loess under freezing and thawing environment. Coal Eng (3):107–112
go back to reference Ye WJ, Wu YT, Yang GS, Jing HJ, Chang SB, Chen M (2019) Study on fine microstructure and macro mechanical properties of ancient soil under the action of dry wet cycle. J rock Mech Eng 10:12 Ye WJ, Wu YT, Yang GS, Jing HJ, Chang SB, Chen M (2019) Study on fine microstructure and macro mechanical properties of ancient soil under the action of dry wet cycle. J rock Mech Eng 10:12
go back to reference Zhao JB (2002) Illuvial Theory and Environment Evolution in Loess Plateau (in Chinese). Science, Beijing Zhao JB (2002) Illuvial Theory and Environment Evolution in Loess Plateau (in Chinese). Science, Beijing
Metadata
Title
Study of pore space variation characteristics of soil samples at different depths in loess strata
Authors
Ziyu Wang
Qiang Sun
Nianqin Wang
Hong Ao
Yuan Xin
Publication date
01-04-2024
Publisher
Springer Berlin Heidelberg
Published in
Bulletin of Engineering Geology and the Environment / Issue 4/2024
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI
https://doi.org/10.1007/s10064-024-03640-x

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