Details
| Original language | English |
|---|---|
| Pages (from-to) | 207-218 |
| Number of pages | 12 |
| Journal | Tunnelling and Underground Space Technology |
| Volume | 35 |
| Publication status | Published - 23 Aug 2012 |
| Externally published | Yes |
Abstract
Weak interlayer is one of unfavorable geological discontinuities often encountered in underground engineering. Many failures of underground openings were reported to be closely related to the existence of weak interlayer nearby. For the purpose of exploring the effect of weak interlayer on failure pattern of rock mass around tunnel, both physical model tests and numerical analysis were carried out to simulate tunnel excavation near an interlayer. In the model tests, by comparison of the failure patterns between homogenous ground and ground with a weak interlayer, it was found that the weak interlayer affected the stability of tunnel by increasing the failure zones and causing asymmetrical stress distribution. The results of model tests were then verified by numerical analysis. Furthermore, based on the numerical analysis results, the location, dip and thickness of the interlayer as well as the distance from the interlayer to the tunnel were proved to be important factors influencing tunnel stability, and the relationships of the induced damage zones with these parameters of the weak interlayer were established. These results can provide a useful guidance for support design and safe excavation of tunnel near or crossing through a weak interlayer.
Keywords
- Model tests, Numerical analysis, Tunnel stability, Weak interlayer of rock mass
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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In: Tunnelling and Underground Space Technology, Vol. 35, 23.08.2012, p. 207-218.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The effect of weak interlayer on the failure pattern of rock mass around tunnel
T2 - Scaled model tests and numerical analysis
AU - Huang, Feng
AU - Zhu, Hehua
AU - Xu, Qianwei
AU - Cai, Yongchang
AU - Zhuang, Xiaoying
N1 - Funding information: This research work was financially supported by Natural Science Foundation of P.R. China (No. 41130751 ), Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT, IRT1029) and Opening Funds of Key Laboratory of Geotechnical and Underground Engineering (Tongji University) of Ministry of Education (KLE-TJGE-B1108) Research Programme for Western China Communication(2011ZB04).
PY - 2012/8/23
Y1 - 2012/8/23
N2 - Weak interlayer is one of unfavorable geological discontinuities often encountered in underground engineering. Many failures of underground openings were reported to be closely related to the existence of weak interlayer nearby. For the purpose of exploring the effect of weak interlayer on failure pattern of rock mass around tunnel, both physical model tests and numerical analysis were carried out to simulate tunnel excavation near an interlayer. In the model tests, by comparison of the failure patterns between homogenous ground and ground with a weak interlayer, it was found that the weak interlayer affected the stability of tunnel by increasing the failure zones and causing asymmetrical stress distribution. The results of model tests were then verified by numerical analysis. Furthermore, based on the numerical analysis results, the location, dip and thickness of the interlayer as well as the distance from the interlayer to the tunnel were proved to be important factors influencing tunnel stability, and the relationships of the induced damage zones with these parameters of the weak interlayer were established. These results can provide a useful guidance for support design and safe excavation of tunnel near or crossing through a weak interlayer.
AB - Weak interlayer is one of unfavorable geological discontinuities often encountered in underground engineering. Many failures of underground openings were reported to be closely related to the existence of weak interlayer nearby. For the purpose of exploring the effect of weak interlayer on failure pattern of rock mass around tunnel, both physical model tests and numerical analysis were carried out to simulate tunnel excavation near an interlayer. In the model tests, by comparison of the failure patterns between homogenous ground and ground with a weak interlayer, it was found that the weak interlayer affected the stability of tunnel by increasing the failure zones and causing asymmetrical stress distribution. The results of model tests were then verified by numerical analysis. Furthermore, based on the numerical analysis results, the location, dip and thickness of the interlayer as well as the distance from the interlayer to the tunnel were proved to be important factors influencing tunnel stability, and the relationships of the induced damage zones with these parameters of the weak interlayer were established. These results can provide a useful guidance for support design and safe excavation of tunnel near or crossing through a weak interlayer.
KW - Model tests
KW - Numerical analysis
KW - Tunnel stability
KW - Weak interlayer of rock mass
UR - http://www.scopus.com/inward/record.url?scp=84875808367&partnerID=8YFLogxK
U2 - 10.1016/j.tust.2012.06.014
DO - 10.1016/j.tust.2012.06.014
M3 - Article
AN - SCOPUS:84875808367
VL - 35
SP - 207
EP - 218
JO - Tunnelling and Underground Space Technology
JF - Tunnelling and Underground Space Technology
SN - 0886-7798
ER -