Field survey of desiccation fissuring of flood embankments

M. Dyer, S. Utili, M. Zielinski

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Early studies on the 1953 North Sea floods showed that desiccation fissuring of clay fill can play a major role in the failure of flood embankments under overflow conditions. However, the onset of desiccation fissuring in embankments and its contribution towards breach initiation has not been fully researched. Field and laboratory studies were thus carried out into the desiccation fissuring of clay flood embankments in the UK. The work found that a critical condition is reached when desiccation creates an interconnected network of sub-vertical and sub-horizontal fissures, which significantly increases the mass permeability of the fill material and hence allows rapid seepage of flood water through the surface layer of the embankment. It is suggested high rates of seepage cause localised uplifting of clay blocks, leading to progressive slope failure and successive breaching. Small-scale desiccation tests carried out on discs of soil in pressure plates showed very good agreement between the onset of cracking in the pressure plates and the moisture content recorded in the field. This suggests that it is possible to assess the susceptibility of a fill material to desiccation fissuring from the soil water characteristic curve.
LanguageEnglish
Pages221-232
Number of pages11
JournalProceedings of the ICE - Water Management
Volume162
Issue number3
DOIs
Publication statusPublished - Jun 2009

Fingerprint

desiccation
embankment
field survey
fill
clay
seepage
slope failure
fissure
surface layer
moisture content
soil water
permeability
soil
water

Keywords

  • embankments
  • floods
  • floodworks
  • site investigation

Cite this

Dyer, M. ; Utili, S. ; Zielinski, M. / Field survey of desiccation fissuring of flood embankments. In: Proceedings of the ICE - Water Management . 2009 ; Vol. 162, No. 3. pp. 221-232.
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Field survey of desiccation fissuring of flood embankments. / Dyer, M.; Utili, S.; Zielinski, M.

In: Proceedings of the ICE - Water Management , Vol. 162, No. 3, 06.2009, p. 221-232.

Research output: Contribution to journalArticle

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