Ditapis dengan
Influence of Aspect Ratio of the Exhaust Opening on Smoke Propagation in a La…
The point extraction system (PES) is effective and popular especially for long and large cross-section tunnels. To clearly comprehend the fire characteristics on the cross-section and correctly apply the smoke strategy, we conduct a series of numerical Computation Fluid Dynamics (CFD) simulations according to the dimensions of the South Hongmei Rd. tunnel, located in Shanghai, China. We set the…
Fire Response Performance and Social Behavior in Tunnels Distingulshing from …
The most decisive factor of tunnels’ safety in the face of fire is the chance of evacuation safely. Immediate response and proper movement in evacuation from tunnels in fire is essential, which can largely improve the rescue efficiency and reduce the casualties. Tunnels, different from buildings, provide significantly different influence on evacuees due to its unique environment, layout, fi…
Research Methods in Tunnel Fire Distingnishing from Buildings in Evaluation
Road tunnels, with large cross-section and long distance, bringsabout vital danger to occupants once in fire. The first few minutes in fire isextremely precious for escapers. Meanwhile, professional aid cannot beobtained. Therefore, it is quite necessary to improve the performance in fire toreduce injury and lost to a large extent. However, current research in evacuationbehavior mostly focu…
Discrete Element Analysis of the Excavation Disturbance of Cross-River Twin-T…
The increasing number of twin-tunnels constructed in river-crossing subway traffic compels the designers to explore its dynamics performance in the excavation progress. The characteristics of particle accelerations of the granular medium in the surroundings are the important factors to reflect the excavation disturbance. In the construction process of the twin-tunnels, the excavation of the sec…
Analytical Solution of Underneath Tunnelling-Induced Deformation of Existing …
Tunnelling underneath the existing tunnels are very common these days. It is obvious that the under-crossing tunnelling will affect and even damage the existing tunnels. An analytical method is proposed in this paper to better understand the effects of the under-crossing tunnelling on the existing tunnel. The existing tunnel is modeled as a Timoshenko beam lying on a Kerr foundation. The validi…
Numerical Analysis of Ground Displacement and Pile Response Due to Tunneling …
The additional pile response due to the creep behavior of the soil is disadvantageous to the safety of pile. However, in the current studies for considering the creep behavior of the soft soil, the pile response induced by the long-term settlement of soil is seldom investigated. This paper mainly discusses the pile response during the excavation and operation periods considering the creep behav…
Defining a "Shallow" Tunnel by Stability Analysis with Dicontinuity Layout Op…
During excavation of NATM tunnel in soft clays, stability problems could arise when the tunnel is too shallow, necessitating special treatment for the surrounding ground such as freezing and jet grouting. However, there is generally no specific rules to help the engineers to determine the critical depth of “shallow” tunnel, which is the dividing line between stably and un…
Numerical Validation of a New Testing Setup for Mechanical Test of Tunnel Lin…
When designing a shield tunnel, there is often a need to carry out mechanical tests on tunnel lining joints to obtain joint stiffness. As tunnel excavation goes deeper, the moment and axial force acting on the lining segments increase, which requires a more rigid backup frame and a stronger foundation for the traditional testing setup. A new testing setup, named as Compression Steel Butterfly…
