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Analytical Viscoelastic Solution for Double-lining Tunnel Under a Non-hydrostatic Stress Field Considering Creep Characteristic of Shotcretet
Analytical Viscoelastic Solution for Double-lining Tunnel Under.. H. Lai et al.
https://orcid.org/http://orcid.org/0000-0002-0928-7023
When constructing tunnels in rheological rocks, the rock creep continuously increases the support structure load. At the same time, due to the influence of the existing environment, shotcrete also undergoes creep, which leads to a complex mechanical mechanism between structures and surrounding rock. Existing research findings only analyze the above issues in the hydrostatic stress field, and this issue has not yet received attention for tunnels built in the non-hydrostatic stress field. This article proposes an analytical solution using complex variable functions and Laplace variation, taking into account the rheological properties of surrounding rock, non-hydrostatic stress field, creep characteristics of shotcrete, and double lining. The paper simulates the rheological properties of shotcrete and rock uses Kelvin-Voigt. Using displacement coordination equations and stress boundaries between surrounding rock, shotcrete, and lining, the tunnel mechanics mechanism can be solved. This article uses both continuity and numerical simulation methods to prove the accuracy of analysis results, and indicates shotcrete creep will reduce its own bearing capacity and displacement constraint capacity while causing an increase in the secondary lining load. The faster the creep rate of shotcrete, the faster the tunnel deformation rate; the smaller the shotcrete creep modulus, greater the tunnel deformation. Therefore, for tunnels located in non-hydrostatic stress fields, the design of secondary lining should consider the creep of shotcrete to prevent the failure of support structures during tunnel operation. Finally, practical cases have proven that the analytical method proposed in this article has the advantages of efficiency and convenience.
Derived an analytical solution of the double lining tunnels in the non-hydrostatic stress field in rheological rocks, and considered the creep characteristics of shotcrete.
Analyzed the variation laws of radial and tangential surrounding rock deformation with angle and time.
Analyzed the variation patterns of tangential and normal stresses between shotcrete and surrounding rock, shotcrete and secondary lining with angle and time.
Analyzed the effects of shotcrete creep parameters, shotcrete and secondary lining supporting timing on deformation and stress.
Analytical Viscoelastic Solution for Double-lining Tunnel Under a Non-hydrostatic Stress Field Considering Creep Characteristic of Shotcretet
Analytical Viscoelastic Solution for Double-lining Tunnel Under.. H. Lai et al.
https://orcid.org/http://orcid.org/0000-0002-0928-7023
When constructing tunnels in rheological rocks, the rock creep continuously increases the support structure load. At the same time, due to the influence of the existing environment, shotcrete also undergoes creep, which leads to a complex mechanical mechanism between structures and surrounding rock. Existing research findings only analyze the above issues in the hydrostatic stress field, and this issue has not yet received attention for tunnels built in the non-hydrostatic stress field. This article proposes an analytical solution using complex variable functions and Laplace variation, taking into account the rheological properties of surrounding rock, non-hydrostatic stress field, creep characteristics of shotcrete, and double lining. The paper simulates the rheological properties of shotcrete and rock uses Kelvin-Voigt. Using displacement coordination equations and stress boundaries between surrounding rock, shotcrete, and lining, the tunnel mechanics mechanism can be solved. This article uses both continuity and numerical simulation methods to prove the accuracy of analysis results, and indicates shotcrete creep will reduce its own bearing capacity and displacement constraint capacity while causing an increase in the secondary lining load. The faster the creep rate of shotcrete, the faster the tunnel deformation rate; the smaller the shotcrete creep modulus, greater the tunnel deformation. Therefore, for tunnels located in non-hydrostatic stress fields, the design of secondary lining should consider the creep of shotcrete to prevent the failure of support structures during tunnel operation. Finally, practical cases have proven that the analytical method proposed in this article has the advantages of efficiency and convenience.
Derived an analytical solution of the double lining tunnels in the non-hydrostatic stress field in rheological rocks, and considered the creep characteristics of shotcrete.
Analyzed the variation laws of radial and tangential surrounding rock deformation with angle and time.
Analyzed the variation patterns of tangential and normal stresses between shotcrete and surrounding rock, shotcrete and secondary lining with angle and time.
Analyzed the effects of shotcrete creep parameters, shotcrete and secondary lining supporting timing on deformation and stress.
Analytical Viscoelastic Solution for Double-lining Tunnel Under a Non-hydrostatic Stress Field Considering Creep Characteristic of Shotcretet
Analytical Viscoelastic Solution for Double-lining Tunnel Under.. H. Lai et al.
https://orcid.org/http://orcid.org/0000-0002-0928-7023
When constructing tunnels in rheological rocks, the rock creep continuously increases the support structure load. At the same time, due to the influence of the existing environment, shotcrete also undergoes creep, which leads to a complex mechanical mechanism between structures and surrounding rock. Existing research findings only analyze the above issues in the hydrostatic stress field, and this issue has not yet received attention for tunnels built in the non-hydrostatic stress field. This article proposes an analytical solution using complex variable functions and Laplace variation, taking into account the rheological properties of surrounding rock, non-hydrostatic stress field, creep characteristics of shotcrete, and double lining. The paper simulates the rheological properties of shotcrete and rock uses Kelvin-Voigt. Using displacement coordination equations and stress boundaries between surrounding rock, shotcrete, and lining, the tunnel mechanics mechanism can be solved. This article uses both continuity and numerical simulation methods to prove the accuracy of analysis results, and indicates shotcrete creep will reduce its own bearing capacity and displacement constraint capacity while causing an increase in the secondary lining load. The faster the creep rate of shotcrete, the faster the tunnel deformation rate; the smaller the shotcrete creep modulus, greater the tunnel deformation. Therefore, for tunnels located in non-hydrostatic stress fields, the design of secondary lining should consider the creep of shotcrete to prevent the failure of support structures during tunnel operation. Finally, practical cases have proven that the analytical method proposed in this article has the advantages of efficiency and convenience.
Derived an analytical solution of the double lining tunnels in the non-hydrostatic stress field in rheological rocks, and considered the creep characteristics of shotcrete.
Analyzed the variation laws of radial and tangential surrounding rock deformation with angle and time.
Analyzed the variation patterns of tangential and normal stresses between shotcrete and surrounding rock, shotcrete and secondary lining with angle and time.
Analyzed the effects of shotcrete creep parameters, shotcrete and secondary lining supporting timing on deformation and stress.
Analytical Viscoelastic Solution for Double-lining Tunnel Under a Non-hydrostatic Stress Field Considering Creep Characteristic of Shotcretet
Analytical Viscoelastic Solution for Double-lining Tunnel Under.. H. Lai et al.
Rock Mech Rock Eng
Lai, Haixiang (Autor:in) / Liu, Baoguo (Autor:in) / Chu, Zhaofei (Autor:in) / Shi, Xiaomeng (Autor:in) / Song, Yu (Autor:in) / Deng, Tingbang (Autor:in)
Rock Mechanics and Rock Engineering ; 58 ; 2635-2659
01.03.2025
25 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Tunnel structure , Non-hydrostatic stress field , Rheological rock , Creep characteristic of shotcrete , Double-lining tunnel , Analytical solution Engineering , Civil Engineering , Resources Engineering and Extractive Metallurgy , Earth Sciences , Geophysics/Geodesy , Earth and Environmental Science
Analytical solution of longitudinal behaviour of tunnel lining
| British Library Conference Proceedings | 2009