Ditapis dengan
Numerical Study on High Stiffness Segmental Joints of Shield Tunnels
Deep buried drainage shield tunnels have the characteristics of large buried depth and high inner water pressure. The load effect of high inner water pressure and large earth pressure causes the increase of bending moment and decrease of axial force in the joint section. To meet the requirements of bearing capacity and deformation of lining structures, high stiffness segmental joints (HSSJs) wi…
Mechanical Analysis of a Super-Large-Diameter Shield Tailskin Under Deep Grou…
The deformation and stress of a super-large-diameter shield tailskin are analyzed in this paper. Four kinds of structure analysis models, i.e. the perfect solid shell model, the defected solid shell model, the perfect hollow-layered shell model, and the defected hollow-layered shell model are formed to study the effects of initial geometrical defects and the hollow-layered shell formation on th…
Experimental and Numerical Study on Longitudinal Axial Force and Deformation …
Dislocation between adjacent rings and opening of conferential joints are two typical distress of shield tunnel due to longitudinal uneven settlement. However, most existing analysis methods only considered one distress. In this study, a longitudinal deformation model of shield tunnel is proposed based on the longitudinal deformation mechanism, which takes both bending deformation and shear def…
Numerical Modeling on Localized Ground Subsidence Induced by the Tunneling in…
Ground subsidence caused by tunneling is becoming a common problem in China due to rapid developing of underground space. Superstructures may crack and/or incline subjected to localized ground subsidence caused by tunneling. Ground subsidence would also induce breackage of buried pipelines which may even cause ground collapse due to pipe leakage. Mechanism of ground subsidence caused by tunneli…
A Multilayer Analytical Model and Experimental Verification for Tunnel Lining…
The thermal-mechanical behavior of tunnel lining segment plays a key role in governing its fire protection design. Existing models are mainly developed for the analysis nonlinear and non-elastic behavior of segment under fire, however the complexity of the model impede their application in engineering. In this study, a multilayer analytical model is proposed to describe the behavior of segmen…
Influence of Aspect Ratio of the Exhaust Opening on Smoke Propagation in a La…
The point extraction system (PES) is effective and popular especially for long and large cross-section tunnels. To clearly comprehend the fire characteristics on the cross-section and correctly apply the smoke strategy, we conduct a series of numerical Computation Fluid Dynamics (CFD) simulations according to the dimensions of the South Hongmei Rd. tunnel, located in Shanghai, China. We set the…
