Robots’ visual perception is a field that is gaining increasing attention from researchers. This is partly due to emerging trends in the commercial availability of 3D scanning systems or devices that produce a high information accuracy level for a variety of applications. In the history of mining, the mortality rate of mine workers has been alarming and robots exhibit a great deal of potentials...

The response of a massif to stresses generated by tunnel excavation depends essentially on the geological conditions, geometry and its underground position. major problem related construction these structures is ensure stability whole tunnel-ground, controlling various deformation during construction. In this context, present paper examines effect conditions behavior tunnels surrounding soil. s...

The impermeability of concrete the exterior wall underground tunnel in water-rich stratum is a key concern engineers. Taking Aixihu highway Nanchang city as an example, side tested, through multiple tests, such embedded steel pipe, water injection, and field observation. results show that, under action 2mpa pressure, no flow permeates from tunnel, indicating that impermeable performance this se...

During the last decades, the railway traffic in densely populated areas has increased. At the same time, passenger trains have become faster and freight trains have become heavier. Consequently, trains are an increasing source of ground vibration, which may be a nuisance to people, buildings and sensitive equipment. In this research, a two-dimensional dynamic system, including underground train...

The ground reaction curve (GRC) is a vital component of the convergence-confinement method, which possesses many applications in the underground space designs. It defines a relation between the tunnel wall deformations and the ground pressure acting on the tunnel walls. Generally, GRC includes descending and ascending branches. According to many researchers, the descending branch trend for the ...

Shield tunnelling is used widely in constructing underground infrastructure in cities due to the ability to limit settlements and damage to existing buildings. However, in an environment with soft overburden and buildings on pile foundations, the tunnel is often designed well below the pile tip level. There are two reasons for doing this: to reduce interaction between tunnelling process and pil...

Evaluation of the interaction between a new and the existing underground structures is one of the important problems in urban tunneling. In this work, using FLAC3D, four numerical models of single- and twin-tube tunnels in urban areas are developed, where the horizontal distance between the single- and twin-tube tunnels are varied. The aim is to analyze the effects of the horizontal dista...

Evidence is presented for neutrons emanating from partially deuterated titanium foils (TiDx) subjected to non-equilibrium conditions (charged particle results appear in a separate paper in this proceedings). Two types of deuteriding and varied currents were employed to produce the non-equilibrium conditions within the foils, and emissions lasted over long durations. Experiments were conducted i...

With advantages of less land use and better protection for urban landscapes, the underground expressway has become a new solution for urban traffic problems. Relevant safety studies are deficient despite of their significance in urban road networks. The differences between expressways on and under the ground made it inappropriate to apply the detailed design of the former directly or mechanical...