Numerical analysis of tunnels and deep excavations
نویسنده
چکیده
This report covers 33 papers submitted to the session Numerical Analysis of Tunnels and Deep Excavations. The majority of papers (26) addresses aspects related to tunnelling, both NATM and bored tunnels. As compared to previous conferences analysis of interaction between tunnel construction and surrounding structures such as buildings and pile foundations seems to have become more important. Only about 30% of the papers include actual field data but some additional papers cover practical aspects of tunnel construction. In this report the key points of each contribution are summarized. Finally some concluding remarks on the role of numerical modelling in underground construction in soft ground are added from a personal point of view.
منابع مشابه
Numerical Investigation on Effects of Deep Excavations’ Position on Existing Metro Tunnels in Urban Areas
Nowadays deep excavations are needed for construction of foundation of high rise buildings, providing space for parking and etc. In some cases deep excavations may be constructed in the vicinity of the subway tunnels and causes unpredicted extra displacements and internal forces in tunnel lining of tunnels which were not designed for them and consequently affect serviceability of tunnel. Theref...
متن کاملStudy of Loose Soil Layer Effects on Excavations Supported by Steel Sheet Pile Walls – A Numerical Study
Abstract Steel sheet pile walls are being widely used in civil engineering projects for support systems. Soil is not uniform in depth, sometimes may be exit loose or soft soil layer in various depth. This issue can cause different effects on ground surface displacements, forces and moments acting on sheet piles and struts during excavation procedure, compared with status that soil is uniform...
متن کاملOn micromechanical damage modeling in geomechanics: Influence of numerical integration scheme
Tunnel excavations in deep rocks provide stress perturbations which initiate diffuse and/or localized damage propagation in the material. This damage phenomenon can lead to significant irreversible deformations and changes in rock properties. In this paper, we propose to model such behavior by considering a micromechanically-based damage approach. The resulting micromechanical model, which also...
متن کاملEvaluation of Seismic Vulnerability of Reinforced Concrete Buildings Adjacent to the Deep Excavations
In this study, the effect of deep excavation on the seismic response of RC moment resisting building systems has been studied. Deep excavation can cause significant changes in the stress and strain levels of soil environment and also changes in the propagation of seismic waves. This leads to permanent displacements in the foundation system. In this study, three RC building systems, i.e. 5, 10, ...
متن کاملNumerical modelling of the underground roadways in coal mines– uncertainties caused by use of empirical-based downgrading methods and in situ stresses
Numerical modelling techniques are not new for mining industry and civil engineering projects anymore. These techniques have been widely used for rock engineering problems such as stability analysis and support design of roadways and tunnels, caving and subsidence prediction, and stability analysis of rock slopes. Despite the significant advancement in the computational mechanics and availabili...
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