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Safety level evaluation for existing rockfall protection gallery Rieinertobel

 Safety level evaluation for existing rockfall protection gallery Rieinertobel
Author(s): , , ,
Presented at IABSE Symposium: Engineering the Future, Vancouver, Canada, 21-23 September 2017, published in , pp. 3384-3391
DOI: 10.2749/222137817822208564
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Within the coming decade many ageing rockfall protection galleries in the Swiss Alps will require rehabilitation measures to ensure their durability. Before a gallery is rehabilitated, its current ...
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Bibliographic Details

Author(s): (Matrisk GmbH, Affoltern am Albis, Switzerland)
(Matrisk GmbH, Affoltern am Albis, Switzerland)
(Tiefbauamt Graubünden , Chur, Switzerland)
(Tiefbauamt Graubünden , Chur, Switzerland)
Medium: conference paper
Language(s): English
Conference: IABSE Symposium: Engineering the Future, Vancouver, Canada, 21-23 September 2017
Published in:
Page(s): 3384-3391 Total no. of pages: 8
Page(s): 3384-3391
Total no. of pages: 8
Year: 2017
DOI: 10.2749/222137817822208564
Abstract:

Within the coming decade many ageing rockfall protection galleries in the Swiss Alps will require rehabilitation measures to ensure their durability. Before a gallery is rehabilitated, its current safety level needs to be assessed to decide whether strengthening measures are also necessary. Generally, an assessment of structures several decades old with current design standards will result in a recommendation for expensive strengthening measures. However, design standards may offer the possibility for a risk-based assessment, e.g. Swiss standard SIA 269 [1], which allows for evaluating strengthening measures in consideration of both safety and cost-efficiency. This paper describes a risk-based assessment for the rockfall protection gallery Rieinertobel and shows that target safety requirements can be met without strengthening measures. The described approach allows for managing ageing infrastructure in a cost-efficient manner without compromising safety.‌‌

Keywords:
existing structures target reliability rockfall gallery consequences of failure cost efficiency design loads natural hazards