Many subways, light rails, and trains travel through urban flood retention regions via tunnels, viaducts, roadbeds; however, less is known about the influence laws of rail transportation by crossing ways. Rail transit projects were chosen as research objects for ordinary subway, rail, railway passing detention areas in Wuhan, characteristics systematically compared three The study revealed that...

The application of mine method shallow burying and undercutting in subway tunnel engineering is becoming more significant, but also has its own limitations: the can easily cause subsidence nearby surface, there a security threat to surrounding buildings, instability inside, easy collapse construction tunnels, endangering safety, so ensuring safety becomes key project. By combining examples Heyi...

Dimensionless coefficient () in convergence confinement method shows the relaxation of stress in the wall of the tunnel at different excavation movements. This factor is considered a constant number in previous studies and tunnel geometric characteristics (such as depth, cross-section shape, radius, soil material, etc.) are not included in its determination; however, ignoring these effects can...

Quickly and accurately identifying water leakage is one of the important components health monitoring subway tunnels. A mobile vision measurement system consisting several high-resolution, industrial, charge-coupled device (CCD) cameras placed on trains to implement structural in Through image processing technology proposed this paper, areas tunnels can be found repaired real time. lightweight ...

A Zigbee-based ubiquitous sensor network (USN) has many industrial applications and provides flexible measuring environments. In particular, the USN system can replace existing measuring devices in harsh environments such as subway stations. To monitor the intensities of various pollutants and air qualities in subway tunnels, this study applied the USN technique. A novel wireless sensor module,...

Abstract The shield machine’s ability to simultaneously cut soft soil and hard rock makes it widely used in subway tunnels, diversion tunnels other underground engineering constructions. As the core component of composite machine, cutter head has a decisive effect on work efficiency machine. When machine is working, positive pressure directly affects working performance However, when its been i...

Regional extreme rainfall events have occurred frequently in China, and subway tunnel construction faces possible threats under weather conditions. Thus, this study, we used the set pair analysis (SPA) approach to safety evaluation of tunnels developed a model circumstances. Firstly, based on careful consideration complex environment conditions, system was considering four aspects: rainfall, hy...

This paper presents a stochastic model for emergency evacuation simulation such as for a subway station. The model, MCEVAC was developed using Monte Carlo and a macro-simulation technique; the model includes a number of random variables, such as occupant load, initial occupant load, and pre-evacuation time. A random event of a train fire including fire location, fire growth rate, and the effect...