Abstract The creep property of soft soil can weaken the soil-arch effect, leading to the variation of the load and deformation of the tunnel lining with time. Considering the viscosity of soft soil, a creep model coupling with time hardening rule and the Druker-Prager yield criterion was adopted, and a finite-element model was established using numerical analysis software ABAQUS to analyze the effect of soft soil creep on the contact pressure between the tunnel and stratum, tunnel deformation and internal force varying with time based on the data obtained from an indoor tri-axial rheological test of Shanghai soft soil. The influence of soft soil creep on the soil-arch effect and longterm mechanical properties of the lining is discussed in this paper.
Abstract：
The creep property of soft soil can weaken the soil-arch effect, leading to the variation of the load and deformation of the tunnel lining with time. Considering the viscosity of soft soil, a creep model coupling with time hardening rule and the Druker-Prager yield criterion was adopted, and a finite-element model was established using numerical analysis software ABAQUS to analyze the effect of soft soil creep on the contact pressure between the tunnel and stratum, tunnel deformation and internal force varying with time based on the data obtained from an indoor tri-axial rheological test of Shanghai soft soil. The influence of soft soil creep on the soil-arch effect and longterm mechanical properties of the lining is discussed in this paper.
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Cite this article:
.Effects of Soft Soil Creep on the Load and Deformation of a Tunnel Lining[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(4): 107-114
2017, Vol. 54 