JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

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Experimental investigation on the stability of shield tunnel excavation face with water-rich in upper loose and lower dense strata

Author(s): Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI
Affiliation(s): Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China; more
Corresponding email(s): cxp2021@emails.bjut.edu.cn
Key Words: Shield tunnel; Upper loose and lower dense strata; Excavation face stability; Water pressure ratio

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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 with water-rich in upper loose and lower dense strata[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2400309

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author="Pengfei LI, Chuang WANG, Xiaopu CUI, Qing XU, Zhaoguo GE, Shaohua LI",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2400309"
}

%0 Journal Article
%T Experimental investigation on the stability of shield tunnel excavation face with water-rich in upper loose and lower dense 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
%P
%@ 1673-565X
%D in press
%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A2400309"

TY - JOUR
T1 - Experimental investigation on the stability of shield tunnel excavation face with water-rich in upper loose and lower dense 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
SP -
EP -
%@ 1673-565X
Y1 - in press
PB - Zhejiang University Press & Springer
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doi="https://doi.org/10.1631/jzus.A2400309"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: Maintaining the stability of 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 homogeneous strata, with limited research conducted on strata with upper loose and lower dense. 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 (α) in water-rich upper loose and lower dense strata. The accuracy of these model tests is verified using numerical simulations. The results indicate that as α 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 α 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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