Treatment and Effect of Loess Metro Tunnel under Surrounding Pressure and Water Immersion Environment
Joint Authors
Li, Heng
Liu, Tong
Li, Chenghan
Wang, Lixin
Qiu, Junling
Wang, Ke
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-18, 18 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-06-13
Country of Publication
Egypt
No. of Pages
18
Main Subjects
Abstract EN
It is possible to pass through a collapsible loess stratum during metro tunneling.
When the surrounding potential water sources with pressure are induced by external influences, the tunnel structure will be influenced in the affected area of loess collapsibility.
To deal with the water inrush disaster of the tunnel in a collapsible loess stratum, the mechanism of grouting diffusion in the loess stratum is analyzed.
It is found that the main influencing factors of the grouting effect are the radius of the grouting ring and the permeability coefficient of the grouting ring.
Then, based on the water inrush section of a metro tunnel in Xi’an city, China, the treatment effect of the project is compared and analyzed through field tests, field monitoring, and finite element simulation.
The results show that the water pressure at the measuring point of the tunnel vault is reduced by 4 MPa; the maximum and the minimum principal stresses at the top of the segment lining increased by 34.9 kPa and 8.8 kPa, respectively, which is less than the increase without grouting; and the maximum displacement of the surrounding rock is reduced by 19 mm.
The plastic area produced by local water source infiltration is about 62% of that before grouting.
The treatment measures of grouting in the tunnel are safe and effective.
This study is of valuable meaning for the treatment of water inrush disaster of a loess tunnel under the water environment.
American Psychological Association (APA)
Wang, Lixin& Li, Chenghan& Qiu, Junling& Wang, Ke& Liu, Tong& Li, Heng. 2020. Treatment and Effect of Loess Metro Tunnel under Surrounding Pressure and Water Immersion Environment. Geofluids،Vol. 2020, no. 2020, pp.1-18.
https://search.emarefa.net/detail/BIM-1165215
Modern Language Association (MLA)
Wang, Lixin…[et al.]. Treatment and Effect of Loess Metro Tunnel under Surrounding Pressure and Water Immersion Environment. Geofluids No. 2020 (2020), pp.1-18.
https://search.emarefa.net/detail/BIM-1165215
American Medical Association (AMA)
Wang, Lixin& Li, Chenghan& Qiu, Junling& Wang, Ke& Liu, Tong& Li, Heng. Treatment and Effect of Loess Metro Tunnel under Surrounding Pressure and Water Immersion Environment. Geofluids. 2020. Vol. 2020, no. 2020, pp.1-18.
https://search.emarefa.net/detail/BIM-1165215
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1165215