Abstract
The most important issue during shield TBM tunneling in soft ground formations is to appropriately control ground surface settlement. Among various operational conditions in shield TBM tunneling, the face pressure and backfill pressure should be the most important and immediate measure to restrain surface settlement during excavation. In this paper, a 3-D hydro-mechanical coupled FE model is developed to numerically simulate the entire process of shield TBM tunneling, which is verified by comparing with real field measurements of ground surface settlement. The effect of permeability and stiffness of ground formations on tunneling-induced surface settlement was discussed in the parametric study. An increase in the face pressure and backfill pressure does not always lead to a decrease in surface settlement, but there are the critical face pressure and backfill pressure. In addition, considering the relatively low permeability of ground formations, the surface settlement consists of two parts, i.e., immediate settlement and consolidation settlement, which shows a distinct settlement behavior to each other.
| Original language | English |
|---|---|
| Pages (from-to) | 823-831 |
| Number of pages | 9 |
| Journal | Geomechanics and Engineering |
| Volume | 15 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2018 Jun 30 |
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Keywords
- Backfill pressure
- Consolidation
- Face pressure
- TBM
- Tunneling
ASJC Scopus subject areas
- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology
Cite this
Critical face pressure and backfill pressure in shield TBM tunneling on soft ground. / Kim, Kiseok; Oh, Juyoung; Lee, Hyobum; Kim, Dongku; Choi, Hangseok.
In: Geomechanics and Engineering, Vol. 15, No. 3, 30.06.2018, p. 823-831.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Critical face pressure and backfill pressure in shield TBM tunneling on soft ground
AU - Kim, Kiseok
AU - Oh, Juyoung
AU - Lee, Hyobum
AU - Kim, Dongku
AU - Choi, Hangseok
PY - 2018/6/30
Y1 - 2018/6/30
N2 - The most important issue during shield TBM tunneling in soft ground formations is to appropriately control ground surface settlement. Among various operational conditions in shield TBM tunneling, the face pressure and backfill pressure should be the most important and immediate measure to restrain surface settlement during excavation. In this paper, a 3-D hydro-mechanical coupled FE model is developed to numerically simulate the entire process of shield TBM tunneling, which is verified by comparing with real field measurements of ground surface settlement. The effect of permeability and stiffness of ground formations on tunneling-induced surface settlement was discussed in the parametric study. An increase in the face pressure and backfill pressure does not always lead to a decrease in surface settlement, but there are the critical face pressure and backfill pressure. In addition, considering the relatively low permeability of ground formations, the surface settlement consists of two parts, i.e., immediate settlement and consolidation settlement, which shows a distinct settlement behavior to each other.
AB - The most important issue during shield TBM tunneling in soft ground formations is to appropriately control ground surface settlement. Among various operational conditions in shield TBM tunneling, the face pressure and backfill pressure should be the most important and immediate measure to restrain surface settlement during excavation. In this paper, a 3-D hydro-mechanical coupled FE model is developed to numerically simulate the entire process of shield TBM tunneling, which is verified by comparing with real field measurements of ground surface settlement. The effect of permeability and stiffness of ground formations on tunneling-induced surface settlement was discussed in the parametric study. An increase in the face pressure and backfill pressure does not always lead to a decrease in surface settlement, but there are the critical face pressure and backfill pressure. In addition, considering the relatively low permeability of ground formations, the surface settlement consists of two parts, i.e., immediate settlement and consolidation settlement, which shows a distinct settlement behavior to each other.
KW - Backfill pressure
KW - Consolidation
KW - Face pressure
KW - TBM
KW - Tunneling
UR - http://www.scopus.com/inward/record.url?scp=85050373587&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050373587&partnerID=8YFLogxK
U2 - 10.12989/gae.2018.15.3.823
DO - 10.12989/gae.2018.15.3.823
M3 - Article
AN - SCOPUS:85050373587
VL - 15
SP - 823
EP - 831
JO - Geomechanics and Engineering
JF - Geomechanics and Engineering
SN - 2005-307X
IS - 3
ER -