Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis
The surcharge load at the ground surface inevitably breaks the original equilibrium state between the underneath tunnel and the surrounding soil, which will impact the service performance of a subway tunnel. This paper presents a novel semi-analytical approach for assessing the time-dependent, longi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-02-01
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| Series: | Underground Space |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967423001071 |
| _version_ | 1797391776964673536 |
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| author | Fayun Liang Zhuwei Jiang Qiang Yuan Lin Li Rulu Wang |
| author_facet | Fayun Liang Zhuwei Jiang Qiang Yuan Lin Li Rulu Wang |
| author_sort | Fayun Liang |
| collection | DOAJ |
| description | The surcharge load at the ground surface inevitably breaks the original equilibrium state between the underneath tunnel and the surrounding soil, which will impact the service performance of a subway tunnel. This paper presents a novel semi-analytical approach for assessing the time-dependent, longitudinal responses of a subway tunnel in soft soil strata induced by the surcharge load. The solution is developed based on the framework of the classical “two-stage method” but innovatively incorporates the effects of ground stratification, the consolidation process, and the longitudinal stiffness reduction of the lining. Biot’s poroelastic theory in conjunction with the Laplace-Fourier transform technique is selected to model the deformation of the stratified ground, while the Timoshenko beam on a Pasternak foundation is employed to model the mechanical responses of the tunnel. The proposed semi-analytical solution is validated not only by comparison with benchmark solutions and a finite element model, but also by predicting a well-documented field measurement. Parametric analyses are conducted to investigate the effects of the elastic modulus and the permeability coefficient of the stratified ground on the longitudinal responses of the tunnel. It is expected that the proposed solution can serve as a useful tool for evaluating the effects of the surcharge load on the longitudinal responses of a subway tunnel. |
| first_indexed | 2024-03-08T23:37:35Z |
| format | Article |
| id | doaj.art-4218da281c584d7e96cbbe3aec5febf9 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-08T23:37:35Z |
| publishDate | 2024-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-4218da281c584d7e96cbbe3aec5febf92023-12-14T05:23:26ZengKeAi Communications Co., Ltd.Underground Space2467-96742024-02-0114219238Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysisFayun Liang0Zhuwei Jiang1Qiang Yuan2Lin Li3Rulu Wang4Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; Corresponding author.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaShanghai Shentong Metro Group Limited Maintenance Center, Shanghai 20070, ChinaThe surcharge load at the ground surface inevitably breaks the original equilibrium state between the underneath tunnel and the surrounding soil, which will impact the service performance of a subway tunnel. This paper presents a novel semi-analytical approach for assessing the time-dependent, longitudinal responses of a subway tunnel in soft soil strata induced by the surcharge load. The solution is developed based on the framework of the classical “two-stage method” but innovatively incorporates the effects of ground stratification, the consolidation process, and the longitudinal stiffness reduction of the lining. Biot’s poroelastic theory in conjunction with the Laplace-Fourier transform technique is selected to model the deformation of the stratified ground, while the Timoshenko beam on a Pasternak foundation is employed to model the mechanical responses of the tunnel. The proposed semi-analytical solution is validated not only by comparison with benchmark solutions and a finite element model, but also by predicting a well-documented field measurement. Parametric analyses are conducted to investigate the effects of the elastic modulus and the permeability coefficient of the stratified ground on the longitudinal responses of the tunnel. It is expected that the proposed solution can serve as a useful tool for evaluating the effects of the surcharge load on the longitudinal responses of a subway tunnel.http://www.sciencedirect.com/science/article/pii/S2467967423001071Time-dependentLongitudinal responsesStratified groundSubway tunnelsGround surface surchargeConsolidation |
| spellingShingle | Fayun Liang Zhuwei Jiang Qiang Yuan Lin Li Rulu Wang Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis Underground Space Time-dependent Longitudinal responses Stratified ground Subway tunnels Ground surface surcharge Consolidation |
| title | Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis |
| title_full | Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis |
| title_fullStr | Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis |
| title_full_unstemmed | Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis |
| title_short | Time-dependent longitudinal responses of a shield tunnel induced by surcharge load: Theoretical prediction and analysis |
| title_sort | time dependent longitudinal responses of a shield tunnel induced by surcharge load theoretical prediction and analysis |
| topic | Time-dependent Longitudinal responses Stratified ground Subway tunnels Ground surface surcharge Consolidation |
| url | http://www.sciencedirect.com/science/article/pii/S2467967423001071 |
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