(1) Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Room 719, Salt Lake City, UT 84112, USA
Abstract:
The Pretunnel technology allows the final or preliminary lining to be built ahead of a tunnel face. The paper shows how this technology has been used for mechanizing the full-face excavation of large tunnels in difficult ground conditions with minimum settlements. Analytical methods are presented for the analysis of the lining both in deep and shallow applications. Fields of applicability are established using results of parametric studies based on the methods proposed.