tunnelling Articles
-
Psychosocial factors, perceived risk and driving in a hostile environment: driving through tunnels
A large part of the research on risk in driving has been related to the consumption of alcohol and other substances. However, few studies have analysed risk behaviour in relation to road infrastructure. It took the dramatic accident in the Mont Blanc tunnel to highlight the lack of knowledge about the human factor involved in tunnel accidents and about the factors affecting emergency situations ...
-
Study on nanoparticles embedded multilayer gate dielectric MOS non–volatile memory devices
Here, we present a computational study on stacked multilayer nanoparticles embedded gate dielectric MOS non–volatile memory devices. Two device structures, one with a pure SiO2 tunnel oxide and other with a stacked HfO2–SiO2 tunnel oxide were compared. The Au nanocrystals were assumed embedded in a Si3N4 layer. The electrical parameters of the composite multilayer were evaluated using ...
-
Utilising of linear and non-linear prediction tools for evaluation of penetration rate of Tunnel Boring Machine in hard rock condition
Predicting Tunnel Boring Machine (TBM) penetration rate is a crucial issue for the successful fulfilment of a mechanical tunnel project. Penetration rate depends on many factors such as intact rock properties, rock mass conditions and machine specifications. In this paper, linear and non-linear multiple regression as well as Artificial Neural Network (ANN) techniques were applied to predict the ...
-
Fluoride Emission from Anode Butts in a Cooling Tunnel
Abstract Nordic Aluminium has been trying out a cooling tunnel for hot anode butts in order to lower the fluoride content of the working environment. The cooling tunnel is connected to the Fume Treatment Plant so that it has forced suction from it. The purpose of this study is to evaluate the effectiveness of the tunnel in removing HF emissions and make suggestions on how to make the tunnel ...
-
Development, testing and evaluation of a tunnel emergency management decision support system
An emergency management system dealing with emergencies in road and railway tunnels has been developed, and the system evaluation is discussed in the paper. The paper will include descriptions of the types of major accidents, their frequencies and consequences, and means to increase the safety in tunnels. The success criteria for the evaluation are defined and discussed from the points of view of ...
-
State-of-the-art road tunnel safety
This paper presents the current state of French and European practices for road tunnel safety. It rapidly surveys the main aspects of legislation, and then presents the evolution of risk governance in tunnels from being initially focused on technical devices to gradually integrating human and organisational aspects in the approach of safety. A brief presentation of recent projects dealing with ...
-
Guidelines on Design of Rock Excavations - Case Study
Project Description In 2009, the Swedish National Rail Administration presented a handbook with guidelines for the design of the load-bearing structure of rock tunnels. Following the merging of several transport administrations into The Swedish Transport Administration, an updated version of the handbook was required. In this version, the handbook comprised guidelines for railroad and road ...
-
Emergency response possibilities at freight railway tunnel accidents
Recent tunnel disasters in several Western European countries such as Switzerland (Gotthard tunnel, 2001) and Austria (Tauern tunnel, 1999), France/Italy (Mont Blanc tunnel, 1999) and Great Britain/France (Channel Tunnel, 1996) have made tunnel safety an area for special attention. In-depth investigations into these accidents focused on individual aspects of tunnel design and hazards. As regards ...
-
Evolution of underground aqueducts in the Hellenic world
Historical and archaeological evidence shows that ancient Hellenes had developed underground aqueducts since the prehistoric times. However, innovative methods of underground aqueducts were developed in Hellas mainly during the Archaic, Classical, Hellenistic, and Roman periods. Since the well-known tunnel at the island of Samos, Hellas, was designed and begun its construction (ca. 550 bc) by ...
-
Operation Comet - Hatfield Tunnel RTA (road traffic accident) - Case Study
A staged multi-vehicle accident in the Hatfield Tunnel, involving a road tanker, 2 lorries and a minibus took place in October 2011. Concept's ViCount smoke system produces the world's most persistent artificial smoke, critical when you are looking at smoke travel over several kilometres. The operation was designed to test the responses of the emergency services and the tunnel video smoke ...
-
Simulation of a tunnel excavation at shallow depth (Ohio River Bridge) - Case Study
Project Description The behavior, during excavation, of a shallow tunnel cutting densely fractured limestones and dolomites raised concerns. The tunnel is called "Drumanar tunnel‘ and located in Louisville, in Southern Indiana. The model geometry is shown on Figure 1. OFFICE INDUSTRIES Civil Engineering CLIENT NAME VINCI LOCATION Indiana, USA SOFTWARE ...
-
Multi–physical field information comprehensive analysis and application of tunnel water–bearing structure
Water inrush and burst mud cause great hidden danger and economic loss, so it gradually became an important technical problem for tunnel construction. The prediction principle of seismic wave method, electromagnetic wave method, and electrical method were analysed. The merits and demerits of the three methods in the prediction of tunnel water–bearing structure were compared. The superiority of ...
-
The function of Truck-mounted Robot Shotcrete Machine in tunnel construction
In the process of tunnel construction, the concrete spraying construction on the tunnel wall is very important, which directly affects the progress of the project. With its technical advantages, the wet spray manipulator has become an important equipment for realizing the standardized operation of the tunnel and the balanced production of the project. The function of Truck-mounted Robot Shotcrete ...
-
Complementary multi-gate tunnelling FETs: fabrication, optimisation and application aspects
In this paper fabrication, optimisation and application aspects of complementary Multiple-Gate Tunnelling FETs (MuGTFETs) are presented. Tunnelling FETs (TFETs) are realised in a state-of-the-art low-power multi-gate CMOS technology. n- and p-type tunnelling currents are observed within a single device structure. Digital and analogue device performance is analysed. Measured devices show ...
-
Isolating Energy in the Wind Tunnel
Wind tunnels, used for aerodynamic and acoustic testing in the automotive and aerospace industries, use one or more electrically driven fans to push or pull air through a test section. Air will either recirculate through a closed loop or be drawn in from the surroundings from one end of the tunnel and exhausted out the opposite end. Around the wind tunnel, there are several full body access ...
-
Water supply of Bologna (Italy) by Roman aqueduct: history, morphology and hydraulic, from ancient time to nowadays
A brief description of the geomorphological, historical, and archaeological aspects of the ancient Bononia (now Bologna) supply by means of an ancient tunnel made by Romans at the beginning of the new, era and its evolution to a nowadays when it's already used (13%) to assure drinking water supply of Bologna Town. Recent exploration of the tunnel has permitted to obtain most data of ancient water ...
-
Hybrid superconducting nanostructures: very low temperature local probing and noise
We review the topic of hybrid superconducting nanostructures by introducing the basic physical concepts and describing recent key experimental results. We discuss the superconductivity nucleation in mesoscopic structures, the vortex lattice imaging in doped diamond films, the superconducting proximity effect, multiple Andreev reflection in Josephson junctions and the electronic micro-cooling in ...
-
Tunnel fire smoke modelling for emergency management
The current paper describes the investigation of parameters related to accidents in tunnels in the framework of the "Advanced Training System for Emergency Management" project, A-TEAM. On this basis, the flow field is investigated within tunnels, and its effects on fire development and smoke concentration fields for these emergency cases are reconstructed. This is achieved with the use ...
-
'Charge pump' effect and mechanisms of charge carriers localisation in oxidised nano-Si
A new effect of 'two-stroke charge pump' has been experimentally observed in nano-Si, which is based on the Auger process ejecting charge carriers from a silicon nanocrystalline core into enveloping SiOx layer. The effect is important for understanding the nature of such phenomena as dimensional decrease of quantum efficiency of emission, space separation of charge carriers and peculiarities of ...
-
Geometry Model for the Follo Line Project - Case Study
Project Description The Follo Line project is the largest railway project in Norway in modern times. The Follo Line is a high-speed railway partly in tunnel from the traffic hub at Ski to Oslo central station. The project comprise a 20 km long tunnel. The new railway is passing through central Oslo, beneath existing infrastructure which creates challenging conditions due to overlapping tunnels ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you