The temperature field evolving in the limestone around the district heating tunnel in Copenhagen due to operation of the long-distance heating pipelines is investigated by means of poro-hydro-thermal numerical analyses. The presented parametric studies illustrate the coupling between the temperature and the groundwater flow. It is shown how a general horizontal groundwater flow and the hydrauli...

In this paper by using numerical evaluation the effect of balancing drupes of water hammer on tunnels lining is considered. In case of not arrangment of these reservoirs, the tunnel lining will be damaged of cyclic powers of water hammer. In this research, function of balancing reservoir of water hammer on cover of tunnels to the barriers’ turbine is simulated by numerical methods and Plaxis 3D...

With the attitude adjustment of shield machine, jack thrust angle will change and may lead to great damage segmental lining structures. In this paper, a three-dimensional refined finite element method is proposed study action mechanism influence on mechanical characteristics tunnel, considering additional constrained boundaries formed by various construction loads. Firstly, established verified...

Investigating fire effects is a continuing endeavour in the research and practice communities concerned with design safety of shield tunnels. This paper aims to provide comprehensive model for assessment structural tunnel segmental ring exposed fire. A thermo-mechanical assembled structure developed basis holistic analysis by incorporating lining segments longitudinal joints, as well improved p...

energy-based optimized design of polymer fiber-reinforced tunnel lining mohammad safi                   analysis of underwater tunnels considering strain-softening behavior in plastic zone ahmad fahimifar; hamed ghadami; masoud ahmadvand; arvin abdolmaleki                                 the effect of operational parameters on penetration rate of a tbm using artificial neural networks- a case s...

The load entering from the ground surrounding on the tunnel’s lining is one of the effective parameters in the designation of a tunnel. The amount of this parameter, which is called Rock load in a rocky environment, depends on several factors such as the overburden thickness, geological and geomechanical conditions and the depth of tunnel. In the present study, the amount of rock load for the L...

In some subsurface urban development projects, bedrock faults intersecting with the tunnel path are inevitable. Due to high costs of it is necessary study behavior such concrete structures under fault movement risks. Using an advanced 3D numerical finite difference code and a plastic hardening constitutive model for soil, this paper examined performance straight oblique segmented Tabriz Subway ...