Framework for Value of Information Analysis in Rock Mass Characterization for Grouting Purposes
Publication: Journal of Construction Engineering and Management
Volume 137, Issue 7
Abstract
The observational method involves recurrent updating, and according to European standards, it is an optional method when geotechnical conditions are difficult to predict. A method for the application of value of information analysis in rock mass characterization for tunnels is demonstrated in a generic case of a feasibility study of a tunnel in hard rock. Two alternative grouting designs are analyzed to find the most suitable design for the geological conditions on site and whether information from investigations is of value in the decision-making process. The uncertainty in the grouting result is described by means of a beta distribution for each alternative design. The probabilities of different geological states are based on 200 stochastic simulations of the rock mass. It was found that value of information analysis contributes to good structure in geological surveys when the geology is difficult to predict and when repeated updating is necessary. The prescribed method is a tool to design well-motivated investigation programs where geotechnical value is weighed up against execution costs.
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Acknowledgments
Financial support from the Rock Engineering Research Foundation (BeFo) is gratefully acknowledged. Special thanks to Prof. Gunnar Gustafson, Chalmers University of Technology, for fruitful comments and suggestions.
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Published In
Journal of Construction Engineering and Management
Volume 137 • Issue 7 • July 2011
Pages: 486 - 497
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 25, 2009
Accepted: Jul 27, 2010
Published online: Jun 15, 2011
Published in print: Jul 1, 2011
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