CLC number:
On-line Access: 2025-05-30
Received: 2024-06-11
Revision Accepted: 2024-08-30
Crosschecked: 2025-05-30
Cited: 0
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Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI. Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata[J]. Journal of Zhejiang University Science A, 2025, 26(5): 471-491.
@article{title="Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata",
author="Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI",
journal="Journal of Zhejiang University Science A",
volume="26",
number="5",
pages="471-491",
year="2025",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2400309"
}
%0 Journal Article
%T Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata
%A Pengfei LI
%A Chuang WANG
%A Xiaopu CUI
%A Qing XU
%A Zhaoguo GE
%A Shaohua LI
%J Journal of Zhejiang University SCIENCE A
%V 26
%N 5
%P 471-491
%@ 1673-565X
%D 2025
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2400309
TY - JOUR
T1 - Experimental investigation on the stability of shield tunnel excavation face in upper loose and lower dense water-rich strata
A1 - Pengfei LI
A1 - Chuang WANG
A1 - Xiaopu CUI
A1 - Qing XU
A1 - Zhaoguo GE
A1 - Shaohua LI
J0 - Journal of Zhejiang University Science A
VL - 26
IS - 5
SP - 471
EP - 491
%@ 1673-565X
Y1 - 2025
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2400309
Abstract: Maintaining the stability of the excavation face is key for ensuring the safety of underwater shield tunnel construction. However, the majority of current studies on the stability of excavation face focus on the homogeneous strata, with limited research conducted on the upper loose and lower dense strata. Active instability tests are conducted in this study, in concert with the digital image correlation (DIC) technique, to investigate the effects of different water pressure ratios in upper loose and lower dense water-rich strata. The accuracy of these model tests is verified using numerical simulations. The results indicate that as water pressure ratio decreases, there is an increase in both the peak displacement of surface settlement and the seepage path range of water ahead of the excavation face expands. In contrast, decreasing water pressure ratio will break the limit equilibrium state of the strata faster, cause the earth pressure on the cutterhead to change more rapidly, and increase the instability range of the strata.
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