General

2026 Book chapter

View at publisher
Authors: John Johansen, C.F. Mathiesen
DOI: 10.1201/9781003762201-2
Cited by: 0

Abstract

When the tunnel portal has been fixed, the area must be carefully cleared of soil and loose rock. The portal is then blasted to give an overburden at the entrance of at least half times the tunnel diameter.

Fields of Study & Subjects

Grouting Rheology and Soil Mechanics Geotechnical Engineering and Analysis Tunneling and Rock Mechanics

Publication details

Pages
2–4
Publication date
8 January 2026
Language
EN
Document type
Book chapter