CLC number: TU45
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2016-09-26
Cited: 0
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Citations: Bibtex RefMan EndNote GB/T7714
Xin-sheng Yin, Ren-peng Chen, Yu-chao Li, Shuai Qi. A column system for modeling bentonite slurry infiltration in sands[J]. Journal of Zhejiang University Science A, 2016, 17(10): 818-827.
@article{title="A column system for modeling bentonite slurry infiltration in sands",
author="Xin-sheng Yin, Ren-peng Chen, Yu-chao Li, Shuai Qi",
journal="Journal of Zhejiang University Science A",
volume="17",
number="10",
pages="818-827",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500290"
}
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%A Ren-peng Chen
%A Yu-chao Li
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%J Journal of Zhejiang University SCIENCE A
%V 17
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%@ 1673-565X
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500290
TY - JOUR
T1 - A column system for modeling bentonite slurry infiltration in sands
A1 - Xin-sheng Yin
A1 - Ren-peng Chen
A1 - Yu-chao Li
A1 - Shuai Qi
J0 - Journal of Zhejiang University Science A
VL - 17
IS - 10
SP - 818
EP - 827
%@ 1673-565X
Y1 - 2016
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1500290
Abstract: Pressurized bentonite slurry is applied on a tunnel face to form a filter cake to stabilize the tunnel face when the slurry shield excavates through the sandy soil. Failure of the tunnel face may be caused by a high permeable filter cake, which commonly has a long penetration distance of slurry in sands. A column system with a height of 680 mm and a diameter of 300 mm was developed to model pressurized slurry infiltration in sands. Pressure transducers were installed to estimate the hydraulic conductivity of the filter cake during slurry infiltration. The electrical conductivity of the leachate of collected samples was measured. Results show that the majority of fine particles in slurry are within the range 100–300 mm into the sand specimen. The time for forming an impermeable filter cake is about 300 s, which indicates the impermeable filter cake is hard to form during the excavation.
The stability of the tunnel face excavated by slurry shield is mainly dependent on pressurized bentonite slurry. Slurry infiltration in pervious strata can partly explain the mechanism of the stability of the tunnel face. In this sense, the topic of the manuscript was significant.
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