THE SQUEEZING POTENTIAL OF ROCK AROUND TUNNELS - THEORY AND PREDICTION WITH EXAMPLES TAKEN FROM JAPAN

Citation
O. Aydan et al., THE SQUEEZING POTENTIAL OF ROCK AROUND TUNNELS - THEORY AND PREDICTION WITH EXAMPLES TAKEN FROM JAPAN, Rock mechanics and rock engineering, 29(3), 1996, pp. 125-143
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Geosciences, Interdisciplinary","Engineering, Civil
ISSN journal
0723-2632
Volume
29
Issue
3
Year of publication
1996
Pages
125 - 143
Database
ISI
SICI code
0723-2632(1996)29:3<125:TSPORA>2.0.ZU;2-S
Abstract
Large deformations of surrounding media around tunnels are often encou ntered during excavations in rocks with squeezing characteristics. The se deformations may sometimes continue for a long period of time. Pred ictions of deformations of tunnels in such grounds are urgently needed , not because of stability concerns, but also of their sevicability. I n the present study, the squeezing phenomenon of rock around tunnels a nd its mechanism and associated factors are first clarified by careful ly studying failures of tunnels, and a survey of tunnels in squeezing rocks in Japan is presented, and its results are summarised. Then, a p ractical method is proposed to predict the squeezing potential and def ormation of tunnels in squeezing rock and this method has been applied to actual tunnelling projects, where squeezing problems were encounte red, to check its applicability and validity. Finally, an extension of this method to the time-dependent behaviour of squeezing rocks is giv en and an application of this method to an actual tunnel is presented.