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Watertight segmental lining at drained cross passages under high water gradients
Author(s) -
Ring Benno,
Gollegger Johannes
Publication year - 2019
Publication title -
geomechanics and tunnelling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.317
H-Index - 18
eISSN - 1865-7389
pISSN - 1865-7362
DOI - 10.1002/geot.201800064
Subject(s) - intersection (aeronautics) , geotechnical engineering , engineering , boundary line , shell (structure) , civil engineering , geology , forensic engineering , structural engineering , engineering drawing , aerospace engineering
The Follo Line tunnels consist of a watertight single shell segmental lining with gaskets. The cross passages are drained, but watertightness is required between the two structures, which is a challenging boundary condition for design and construction. This paper focuses on the structural design of the intersection between the tunnels and the cross passages, which is performed with considerable effort. Special attention is brought to the water pressures acting in this area. Some of the challenges during project execution are discussed as well.