TY - GEN
T1 - Dispersion of fine-grained soils in slurry shield tunnel excavation
AU - Fillibeck, J.
AU - Schindler, U.
AU - Cudmani, R.
N1 - Publisher Copyright:
© 2023 The Author(s).
PY - 2023
Y1 - 2023
N2 - In tunnel drives with a slurry-supported face, the excavated soil is necessarily subjected to mechanical and hydraulic actions, both in the excavation chamber and during hydraulic conveyance. Slurry shield tunnel excavation in semi-solid to solid clay and claystone environments can lead to the dispersion (slaking) of the soil aggregates. These become detached as gravel to stone size chips, but in extreme cases, they may separate further into fine particle aggregates. This raises the question of how much effort is required to remove the fines from the slurry. Large chips can be relatively easily removed, for example by sieving, but fine aggregates are much more difficult and costly to eliminate, requiring the use of, for instance, filter chamber presses and centrifuges. To date, few studies have focussed on the dispersion potential of fine-grained soils or rocks during slurry shield excavation, despite the economic urgency of this issue. Our experimental study aims to address this topic and fill the gap.
AB - In tunnel drives with a slurry-supported face, the excavated soil is necessarily subjected to mechanical and hydraulic actions, both in the excavation chamber and during hydraulic conveyance. Slurry shield tunnel excavation in semi-solid to solid clay and claystone environments can lead to the dispersion (slaking) of the soil aggregates. These become detached as gravel to stone size chips, but in extreme cases, they may separate further into fine particle aggregates. This raises the question of how much effort is required to remove the fines from the slurry. Large chips can be relatively easily removed, for example by sieving, but fine aggregates are much more difficult and costly to eliminate, requiring the use of, for instance, filter chamber presses and centrifuges. To date, few studies have focussed on the dispersion potential of fine-grained soils or rocks during slurry shield excavation, despite the economic urgency of this issue. Our experimental study aims to address this topic and fill the gap.
UR - http://www.scopus.com/inward/record.url?scp=85160338371&partnerID=8YFLogxK
U2 - 10.1201/9781003348030-148
DO - 10.1201/9781003348030-148
M3 - Conference contribution
AN - SCOPUS:85160338371
SN - 9781003348030
T3 - Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World- Proceedings of the ITA-AITES World Tunnel Congress, WTC 2023
SP - 1249
EP - 1257
BT - Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World- Proceedings of the ITA-AITES World Tunnel Congress, WTC 2023
A2 - Anagnostou, Georgios
A2 - Benardos, Andreas
A2 - Marinos, Vassilis P.
PB - CRC Press/Balkema
T2 - ITA-AITES World Tunnel Congress, ITA-AITES WTC 2023 and the 49th General Assembly of the International Tunnelling and Underground Association, 2023
Y2 - 12 May 2023 through 18 May 2023
ER -