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L25 Erlachgalerie avalanche gallery, Defereggental

Austria

The avalanche gallery extends 1093 m overall, of which 140 m were built as a closed tunnel and the remaining 960 m as a gallery structure with an arched cross-section open along one side. On the downhill side, each section of the arched gallery structure is carried on 3 piers instead of a wall. Along the entire length, each section of the gallery cross-section was cast monolithically, complete with the piers on the open, downhill side.

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Project data

Project duration
12 Months
Country
Austria
Contractors
Held & Francke Baugeses.mbH
Structure
Tunnel
Type of structure
Cut-and-cover tunnel

Partially monolithic construction method

Construction method
Partially monolithic
Cross-sectional shape
Curved/round
Clear width
9.0 m
Clear height
8.06 m
Formed length of tunnel
1,093 m
Length of concreting section
12 m
Number of casting sections
92