Ditapis dengan
A Multilayer Analytical Model and Experimental Verification for Tunnel Lining…
The thermal-mechanical behavior of tunnel lining segment plays a key role in governing its fire protection design. Existing models are mainly developed for the analysis nonlinear and non-elastic behavior of segment under fire, however the complexity of the model impede their application in engineering. In this study, a multilayer analytical model is proposed to describe the behavior of segmen…
Effect og Different Adding Methods of Nano-TiO2 on Photocatalytic Degradation…
LOKASI: Ruang Koleksi Umum Rak 3
Effects of Different Factors on the Mining of Extra-Thick Coal Seam
Based on the mining case of Dafosi Coal Mine in Shaanxi Province, which is a typical coal mine with extra-thick coal seam, the effects of mining width, buried depth and rock grade on the ground surface deformation and sur-rounding rock stress have been studied by numerical experiments. It is found that both of the ground surface settlement (SS) and Horizontal Displacement (HD) increased with th…
A Coupled Hydro-Mechanical Modeling of Tunnel Leakagein Sand Layer
The tunnel leakage in sand layer plays an important role in the evolution of the lining stresses and the ground movement. The phenomenon of internal erosion occurs when underground water leaks into the tunnel from the damaged joints or the cracks of the linings. Fines in sand are pulled off by seepage forces and transported throughout the soil matrix into the tunnel. The loss of fines due to se…
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…
Study on Construction Control Measures of Shield Tunnel Overpassing Existing …
Nowadays the problem of soil loss during construction of shield driving has attracted much attention, especially in sandy silt. Moreover, it is easy to cause ground subsidence and destruction of surrounding environment because of the soil’s sensitivity and disturbing characteristic. Factually, existing tunnel has high control standards for deformation as well as its deformation occurs easil…
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…
