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Geotechnical and Geological Engineering
Published in: Geotechnical and Geological Engineering 6/2020

14-07-2020 | Original Paper

Analysis of the Critical Hydraulic Condition of Subterranean Soil Erosion and Its Factors

Authors: Fuwei Jiang, Zhengde Guan

Published in: Geotechnical and Geological Engineering | Issue 6/2020

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Abstract

Subterranean soil erosion is a common form of soil failure that is caused by groundwater seepage. In this paper, we present a subterranean soil erosion model ideally supposed as pipe flow with four conditions. By using the theories of pipe flow, its critical expressions are derived, including the critical flow quantity (Qcr), the critical velocity (Vcr), and the hydraulic gradient (Icr). A simulating experiment is designed to test Qcr to calculate the other critical values. In a case study, 14 clay samples from Guiyang, Guizhou, China, are tested via a simulation experiment. As a result, the critical shear stress of samples is found to be 32.01 Pa. Furthermore, three critical values of suffusion, including Qcr, Vcr and Icr, are calculated with different diameters of soil pores by using the critical expressions. Analyzing the relationship among the values shows that the pore diameter and groundwater temperature influence the critical hydraulic condition of subterranean soil erosion.
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Metadata
Title
Analysis of the Critical Hydraulic Condition of Subterranean Soil Erosion and Its Factors
Authors
Fuwei Jiang
Zhengde Guan
Publication date
14-07-2020
Publisher
Springer International Publishing
Published in
Geotechnical and Geological Engineering / Issue 6/2020
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI
https://doi.org/10.1007/s10706-020-01457-5

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