River-crossing tunnel, Shield construction, Longitudinal uneven deformation, Influential factors, Numerical simulation," />
Study of the Longitudinal Uneven Deformation and Stress State of the Shield Tunnel Crossing the Yangtze River
Abstract Regarding subway shield tunnels, especially underwater subway tunnels with large cross sections, the local depth is usually greater than that of standard tunnels and therefore bears higher hydraulic pressure. As a linear structure, the longitudinal stiffness of a shield tunnel is relatively small, and it is more sensitive to the changes of the external load. The resulting uneven deformation should not be ignored. This paper discusses the effects of variations in overburdens, hydraulic pressures, and stratum as well as the passing of rigid structures on the longitudinal uneven deformation and stress state of a shield tunnel by three-dimensional numerical computations based on the shield tunnel crossing the Yangtze River in the Wuhan subway.
Abstract：
Regarding subway shield tunnels, especially underwater subway tunnels with large cross sections, the local depth is usually greater than that of standard tunnels and therefore bears higher hydraulic pressure. As a linear structure, the longitudinal stiffness of a shield tunnel is relatively small, and it is more sensitive to the changes of the external load. The resulting uneven deformation should not be ignored. This paper discusses the effects of variations in overburdens, hydraulic pressures, and stratum as well as the passing of rigid structures on the longitudinal uneven deformation and stress state of a shield tunnel by three-dimensional numerical computations based on the shield tunnel crossing the Yangtze River in the Wuhan subway.
.Study of the Longitudinal Uneven Deformation and Stress State of the Shield Tunnel Crossing the Yangtze River[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(3): 87-93
2012, Vol. 49 