A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Adequate Numerical Simulation of Tail Void Grouting for Tunneling in Saturated Soil
Abstract In this research, a 3D numerical simulations of tunneling in saturated soil are conducted. The tunnel shield and lining segments with different diameters are explicitly modeled during the progressive excavation. Special attention is paid to accurate simulation of the grout hydration in the tail void where a constitutive model that accounts for the time dependent stiffness is developed to describe the hardening behavior of grout mortar in the coupled hydro-mechanical analysis. Additionally, the effect of grouting pressure distribution along the lining segments is investigated as well. The results reveal that neglecting the evolution of stiffness may lead to underestimation of surface settlements. The results also indicated the insignificant impact of the shape of the annular gap on the soil deformations and lining forces.
Adequate Numerical Simulation of Tail Void Grouting for Tunneling in Saturated Soil
Abstract In this research, a 3D numerical simulations of tunneling in saturated soil are conducted. The tunnel shield and lining segments with different diameters are explicitly modeled during the progressive excavation. Special attention is paid to accurate simulation of the grout hydration in the tail void where a constitutive model that accounts for the time dependent stiffness is developed to describe the hardening behavior of grout mortar in the coupled hydro-mechanical analysis. Additionally, the effect of grouting pressure distribution along the lining segments is investigated as well. The results reveal that neglecting the evolution of stiffness may lead to underestimation of surface settlements. The results also indicated the insignificant impact of the shape of the annular gap on the soil deformations and lining forces.
Adequate Numerical Simulation of Tail Void Grouting for Tunneling in Saturated Soil
Zhao, Chenyang (author) / Lavasan, Arash A. (author) / Schanz, Tom (author)
2018-01-01
4 pages
Article/Chapter (Book)
Electronic Resource
English
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