Measures Against Electrolytic Rail Corrosion in Tokyo Metro Subway Tunnels

Subway Rail Car Filter Sampling Tool

Propagation in Subway Tunnels: SISO and MIMO Channel Characterization

This paper first describes experimental results on the characterization of the propagation in subway tunnels. A first set of experiments have been carried out in Paris subway to determine the path loss, the long term and short term fading and the masking effect produced by a train. Then a wide band analysis has been performed both for a SISO (Single Input Single Output) and for a MIMO (Multiple...

Growth Patterns of Subway/Metro Systems Tracked by Degree Correlation

Urban transportation systems grow over time as city populations grow and move and their transportation needs evolve. Typical network growth models, such as preferential attachment, grow the network node by node whereas rail systems grow by adding entire lines with all their nodes. The objective of this paper is to see if any canonical regular network forms capture the growth patterns of urban m...

Effect of Surface Blasting on Subway Tunnels- A Parametric Study

During wars and crises, the underground tunnels are used as a safe space. Therefore, the stability and safety of them under a blast is of particular importance. In this paper, the Finite Difference Method has been used to study the influence of the change in geotechnical parameters and depth on surface blasting on subway tunnels. Results showed that increasing the internal friction angle, modul...

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...