Guidelines on the Environmental Management of Dams (2001)
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Guidelines on Design Criteria for Concrete Gravity Dams (September 2013)
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Within about ten years of the 1991 edition of the ANCOLD Guidelines on Design Criteria for Concrete Gravity Dams being published the Limit State design approach it proposed fell out of favour with Australian dam engineers. The ANCOLD Executive recognised this situation and resolved that the Guidelines be revised to reflect the preferred design approach amongst Australian dam engineers. A Working Group and a separate Expert Review Panel were formed in 2005 to review the Guidelines with the intention of preparing a document that was not only more in line with the current thinking but would also be widely adopted and used by practicing dam engineers.It has not been an easy task for the Working Group and the Expert Review Panel. Although the working stress method, with associated Factors of Safety, approach was agreed amongst the team, it took considerable time and effort to reach consensus on the details, in particular chapters four through to six. The issue that took most effort to resolve was how the Factors of Safety relate to the level of certainty of the inputs, including knowledge of the foundations, loads, strength of materials and assumed mechanically feasible failure surfaces. The notes to Table 6.4.1 and the discussion in Appendix A highlight this issue.
One thing the drafting team agreed on early, and unanimously, was the importance of the concrete gravity dam design team having a thorough understanding of the foundation conditions, the development of a detailed geological model of the foundations and an understanding of the kinematically feasible failure mechanisms. In keeping with this principle, this revision of the guidelines has the section on foundations at the front of the document. There is a strong recommendation that the design team has expertise covering foundation geology and rock mechanics as well as the dam engineer.
These Guidelines provide a basis for design of concrete gravity dams in most situations. However, they require that the user will be a professional dam engineer with significant experience who is able to use sound engineering judgement in the application of the guidelines. It is recommended that less experienced dam engineers using these guidelines do so under the advice and guidance of an experienced dam engineer. It is the dam engineer who is responsible for the design.
On behalf of ANCOLD I would like to thank the members of the working group and all the other contributors that persevered in developing and bringing these Guidelines to fruition. They will be of great assistance to dam engineering professionals both within Australia and internationally.
Ian Landon-Jones Chairman, ANCOLD Learn more
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Guidelines on Strengthening and Raising Concrete Gravity Dams (1992)
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Guidelines on Dam Safety Management (2003)
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These dam safety guidelines are intended to apply to what might be termed conventional dams (eg. for water supply, irrigation, power and flood mitigation). Guidelines for dam safety management of tailings dams are published separately.These guidelines have been developed by ANCOLD with the aim of promoting appropriate dam safety management practices in Australia. It is recognised that circumstances vary enormously from dam to dam and different administrative frameworks apply in each state. Some states have specific dam legislation while other rely on more general provisions. For these reasons, ANCOLD puts this guideline forward as an advisory document that must be interpreted by appropriately qualified and experienced professionals in each case. In no sense is it intended that they should be regarded as a standard.
The guidelines will again be reviewed when knowledge and practice have developed to the point where an upgrade is required. With this in mind, comment from users and others is welcomed.
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Guidelines
Guidelines on Design of Dams for Earthquake (1998)
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The ANCOLD Guideline brings together improved appraisals of the earthquake loadings that a dam may suffer and then describes appropriate methods for analysis and evaluation. Whilst specific to the Australian considerations the majority of this guideline could be applied to dam structures throughout the world. The ICOLD Bulletins No 46. (1983), No 62. (1988) and No 72. (1989) are parallel documents in this regard, although not including recent advances.This guideline is not a design code, and dam designers must continue to apply their own considerations, judgements and professional skills when designing dams to resist earthquakes. As time goes on there will no doubt be improved data and design tools to help the designer and it is intended that this guideline will be updated as circumstances dictate. ANCOLD welcomes contributions to discussion on this guideline which will assist with future revisions.
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