Elastoplastic Solutions for Deep-Buried Tunnels Considering the Effect of Unsteady Seepage

RIM Hyon Chol; CHEN Youliang; LIU Gengyun; LI Yi; RAFIG Azzam; CHEN Qijian

doi:10.3724/j.gyjzG23010205

Volume 55 Issue 4

Apr. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(4): 132-141

RIM Hyon Chol, CHEN Youliang, LIU Gengyun, LI Yi, RAFIG Azzam, CHEN Qijian. Elastoplastic Solutions for Deep-Buried Tunnels Considering the Effect of Unsteady Seepage[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(4): 132-141. doi: 10.3724/j.gyjzG23010205

Citation:

RIM Hyon Chol, CHEN Youliang, LIU Gengyun, LI Yi, RAFIG Azzam, CHEN Qijian. Elastoplastic Solutions for Deep-Buried Tunnels Considering the Effect of Unsteady Seepage[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(4): 132-141. doi: 10.3724/j.gyjzG23010205

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Elastoplastic Solutions for Deep-Buried Tunnels Considering the Effect of Unsteady Seepage

doi: 10.3724/j.gyjzG23010205

1. Department of Civil Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
2. Department of Engineering Geology and Hydrogeology, RWTH Aachen University, Aachen 52064, Germany;
3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

Received Date: 2023-01-02
Available Online: 2025-06-07
Publish Date: 2025-04-01

Abstract

Abstract

The analytical research on the hydro-mechanical coupling behavior of deep-buried hydraulic tunnels has been mainly concentrated on the mechanical response under steady seepage， but the influence of unsteady seepage has not been considered yet. In this paper， an elastoplastic solution considering unsteady seepage and dilatancy of rocks was derived based on the Mohr-Coulomb criterion， thereafter， the analytical solution of the unsteady seepage field around deep-buried tunnels was derived using the method of separation of variables and Bessel function theory. A parametric sensitivity analysis was conducted to investigate the impact factors of stress and displacement fields. The results showed that compared with the steady seepage field， the unsteady seepage field greatly affected the stability of surrounding rocks， that is to say， the plastic zone and loose zone were enlarged and the deformation of surrounding rock increased. In particular， the effect of dilatancy angle on the deformation of surrounding rock could not be negligible. When the unsteady seepage field was considered， the radial displacement on the tunnel wall was greater than that under steady seepage and same dilatancy angle.
- deep-buried tunnel,
- unsteady seepage,
- dilatancy,
- elastoplastic solution,
- stress field,
- displacement field

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References

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