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From dust till dawn – Baubetriebliche Erfahrungen aus 14 Kilometer „Trockener Vortrieb”
Author(s) -
Irmler Ralf,
Türtscher Matthias,
Hagenhofer Hannes,
Schweiger Horst
Publication year - 2020
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.202000012
Subject(s) - anhydrite , gypsum , geotechnical engineering , geology , quantum tunnelling , drilling , mining engineering , engineering , materials science , paleontology , mechanical engineering , optoelectronics
As part of the reorganization of the Stuttgart railway node, many tunnels had to be driven through the rock formation of gypsum Keuper (Grabfeld Formation), which contains anhydrite. In contact with water, the mineral anhydrite converts into the mineral gypsum with a resulting increase of volume. To prevent damage to the tunnel structure and the buildings above the tunnel as a result of this swelling process, the tunnelling work had to be carried out dry. No water was allowed for cleaning, drilling or for dust reduction. Dry tunnelling for hundreds of metres in this form and intensity is a novelty. There were no empirical values. In this article the special features of a dry tunnelling are presented. A target‐actual comparison or geotechnical deformations should be deliberately avoided, although some peculiarities only result from changes to the contractual framework.