Details
| Original language | English |
|---|---|
| Pages (from-to) | 210-214 |
| Number of pages | 5 |
| Journal | Tunnelling and Underground Space Technology |
| Volume | 71 |
| Publication status | Published - 19 Sept 2017 |
| Externally published | Yes |
Abstract
The key block theory is often the first analysis carried out in assessing potential instability caused by tunneling through jointed rock masses. This study suggests that it is beneficial to include it as the first step for a detailed design analysis by discrete numerical modeling, such as 3D DDA. The procedure is illustrated with an example which is simplified but is general and contains both primary and secondary key blocks. The agreement of the identified key blocks from 3D DDA and the key block theory provides credence for the DDA study, while the DDA, in turn, gives insights on how the failure of the unstable blocks evolves and complements the key block analysis.
Keywords
- 3D modeling, DDA, Fractured rocks, Key block, Tunnel stability
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. 71, 19.09.2017, p. 210-214.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tunnel stability assessment by 3D DDA-key block analysis
AU - Wu, Wei
AU - Zhu, Hehua
AU - Lin, Jeen Shang
AU - Zhuang, Xiaoying
AU - Ma, Guowei
N1 - Funding information: The authors gratefully acknowledge the supports from the State Key Program of National Natural Science of China ( 41130751 ), the Ministry of Science and Technology of China (Grant No. SLDRCE 14-A-09 ).
PY - 2017/9/19
Y1 - 2017/9/19
N2 - The key block theory is often the first analysis carried out in assessing potential instability caused by tunneling through jointed rock masses. This study suggests that it is beneficial to include it as the first step for a detailed design analysis by discrete numerical modeling, such as 3D DDA. The procedure is illustrated with an example which is simplified but is general and contains both primary and secondary key blocks. The agreement of the identified key blocks from 3D DDA and the key block theory provides credence for the DDA study, while the DDA, in turn, gives insights on how the failure of the unstable blocks evolves and complements the key block analysis.
AB - The key block theory is often the first analysis carried out in assessing potential instability caused by tunneling through jointed rock masses. This study suggests that it is beneficial to include it as the first step for a detailed design analysis by discrete numerical modeling, such as 3D DDA. The procedure is illustrated with an example which is simplified but is general and contains both primary and secondary key blocks. The agreement of the identified key blocks from 3D DDA and the key block theory provides credence for the DDA study, while the DDA, in turn, gives insights on how the failure of the unstable blocks evolves and complements the key block analysis.
KW - 3D modeling
KW - DDA
KW - Fractured rocks
KW - Key block
KW - Tunnel stability
UR - http://www.scopus.com/inward/record.url?scp=85028567548&partnerID=8YFLogxK
U2 - 10.1016/j.tust.2017.07.015
DO - 10.1016/j.tust.2017.07.015
M3 - Article
AN - SCOPUS:85028567548
VL - 71
SP - 210
EP - 214
JO - Tunnelling and Underground Space Technology
JF - Tunnelling and Underground Space Technology
SN - 0886-7798
ER -