Influences of hydraulic uplift pressures on stability of gravity dam

S. Utili, Zhenyu Yin, M. Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

A study of the influences of the hydraulic uplift pressures underneath the base of a typical concrete gravity dam on its stability is presented. The dam is located at Cumbidanovu (Sardegna, Italy). The foundation of the dam is made of heavily fractured rock. Firstly, analytical calculations about the equilibrium of the dam as a free body have been employed to evaluate the maximum hydraulic pressure before collapsing and to assess the impact of an effective drainage system on the stability of the dam in a simple way. Secondly, numerical analyses by the distinct element method (DEM) using the code UDEC have been carried out to evaluate the hydraulic flow taking place within the fractured rock foundation, the uplift pressure distribution generated by the calculated flow, and its influence on the stability of the dam. For design purposes, it emerges that availability of reliable data on the hydraulic permeability of rock foundations and a computationally advanced distinct element modeling might lead to the acceptance of loads significantly higher than the more conservative estimations obtained from equilibrium analyses.
Original languageEnglish
Pages (from-to)1554-1568
Number of pages15
JournalYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
Volume27
Issue number8
Publication statusPublished - 1 Aug 2008
Externally publishedYes

Keywords

  • Dam stability
  • Distinct element method (DEM)
  • Gravity dam
  • Hydraulic engineering
  • Hydraulic uplift

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Geology

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