A new and simple model for predicting soil erosion based on hole erosion tests

Weiling Cai, Manash Jyoti Bora, Sreeja Pekkat, Sanandam Bordoloi, Ankit Garg, Sreedeep Sekharan

Research output: Contribution to journalArticlepeer-review

Abstract

Determination of erosion characteristics is of great significance to assess the erodibility of geomaterials that are subjected to seepage force. The erosion characteristics indicate soil particle removal in term of internal erosion that might occur in earthen structures. Hole erosion test (HET) is a simple and effective approach to determine erosion characteristics. It is noted that there are not many studies that focus on the development of a theoretical model describing the erosion characteristics and the associated process of soil particle detachment in HETs. The aim of this study is to propose a simple model based on Bernoulli’s principle to interpret erosion characteristics of geomaterials in HETs. An analytical equation was deduced from a physically based model incorporating Bernoulli’s principle and erosion constitutive law for internal erosion within a soil pipe driven by pressure gradient. The analytical equation could be applied to determine soil particle removal, radial erosion propagation, erosion coefficient, and critical shear stress. A series of HETs were performed under different flow rate to verify the proposed model. The obtained results demonstrated that the proposed model allowed for reasonably predicting the amount of soil particle removal and understanding erosion characteristics of soils through the HET.

Original languageEnglish (US)
Pages (from-to)823-836
Number of pages14
JournalActa Geophysica
Volume71
Issue number2
DOIs
StatePublished - Apr 2023

Keywords

  • ISTC
  • Analytical solution
  • Internal erosion
  • Hole erosion test
  • Erosion characteristics

ASJC Scopus subject areas

  • Geophysics

Fingerprint

Dive into the research topics of 'A new and simple model for predicting soil erosion based on hole erosion tests'. Together they form a unique fingerprint.

Cite this