Influence of pressure and density on the rheological properties of rockfills

Erich Bauer, Zhongzhi Fu, Sihong Liu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Long-term deformations of rockfill dams can be related to the type of dam, the pre-compaction achieved during the construction of the dam, the history of loading events, the rheological properties of the rockfill material used, the seepage behavior caused by defects of the sealing, the interactions of the dam building with the foundation, and the hydrothermal phenomena of the stressed rockfill material. The present paper investigates the rheological properties of coarse grained rockfill materials using a hypoplastic constitutive model. Particular attention is paid to wetting deformation under different deviatoric loading states and pre-compactions. To quantify the state of weathering a so-called "solid hardness" is used in the sense of a continuum description. It is shown that an appropriate modeling of wetting deformations requires a unified description of the interaction at least between the state of weathering, the stress state, the density and the rate of deformation. The results obtained from the numerical simulations are compared with available experimental data for a rockfill material used in Xiaolangdi earth dam.

Original languageEnglish
Pages (from-to)25-34
Number of pages10
JournalFrontiers of Structural and Civil Engineering
Volume6
Issue number1
Publication statusPublished - Mar 2012

Fingerprint

Dams
Weathering
Wetting
Compaction
Embankment dams
Seepage
Constitutive models
Hardness
Defects
Computer simulation

Keywords

  • creep
  • hypoplasticity
  • rockfills
  • solid hardness
  • wetting deformation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture

Cite this

Influence of pressure and density on the rheological properties of rockfills. / Bauer, Erich; Fu, Zhongzhi; Liu, Sihong.

In: Frontiers of Structural and Civil Engineering, Vol. 6, No. 1, 03.2012, p. 25-34.

Research output: Contribution to journalArticleResearchpeer-review

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