On the use of pore pressure measurements in safety reassessments of concrete dams founded on rock
2013 (English)In: Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, ISSN 1749-9518, Vol. 8, no 2, 117-128 p.Article in journal (Refereed) Published
In probabilistic stability analyses of concrete dams founded on rock, the uplift pressure is often a parameter of major importance. In previous literature, it has been suggested that assessing uplift with pore pressure measurements, instead of using empirical assumptions, could improve the calculated dam safety. This paper presents a coherent methodology to investigate whether incorporating pore pressure measurements has any impact on the calculated dam safety, based on Bayesian linear regression of pore pressure data in combination with series-system and the first-order reliability method. The study concludes that the probability of sliding failure is closely related to the probability of an extreme increase in uplift. Hence, measured uplift should only be incorporated while this probability remains sufficiently small, which requires proper programs both for uplift monitoring and for maintenance of drains and grout curtains.
Place, publisher, year, edition, pages
Taylor & Francis, 2013. Vol. 8, no 2, 117-128 p.
dam safety, dams, probability of failure, reliability analysis, system reliability
IdentifiersURN: urn:nbn:se:kth:diva-136377DOI: 10.1080/17499518.2013.864172ScopusID: 2-s2.0-84897054569OAI: oai:DiVA.org:kth-136377DiVA: diva2:675935
QC 201404152013-12-042013-12-042016-09-23Bibliographically approved