Results 171 to 180 of about 66,316 (231)

Probabilistic risk assessment of highway tunnels

Tunnelling and Underground Space Technology, 2011
Many approaches to risk analysis in tunnels have been proposed by both international and national authorities over the last few years. Many safety problems have been discussed and a large number of important risk factors and hazards in tunnels have been identified.
Ondřej Nývlt, Samuel Prívara, Lukáš Ferkl   +2 more
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On Highway Tunnel Intelligent Control

2007 Chinese Control Conference, 2006
This paper analyzed the status quo of highway tunnel control system, and pointed out that the present control system overemphasizes the realization of individual system's function and neglected the consideration of the whole effect. This paper proposed a new research approach, which was to use information fusion technology to process the detected ...
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Optimization on Highway Tunnel Structure

Applied Mechanics and Materials, 2013
For the tunnel section in symmetric structure, it can be analyzed only with half of the tunnel structure. Take the left side of the tunnel which is made up of five arcs tangent with adjacent ones. The method of intelligent direct back analysis based on evolution search is drawing more and more attention.
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Carbon Monoxide Control in a High Highway Tunnel

Archives of Environmental Health: An International Journal, 1967
A 1.6-mile-long, 2-mile-high vehicular tunnel is planned for construction at Straight Creek, in the Rocky Mountains west of Denver. Both elevation and carbon monoxide in the tunnel will tax the oxygen-carrying capacity of blood of tunnel employees and individuals traveling through the tunnel. Based on present information, it is recommended that: carbon
J M, Miranda, V J, Konopinski, R I, Larsen   +2 more
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Zion-Mount Carmel Highway and Tunnel

Civil Engineering Magazine, 2016
For years supporters of the Zion National Park, in southwestern Utah, dreamed of connecting the state’s two main north-south routes, highways 91 and 89, to improve access to the park. In 1930 that connection was made with the opening of the Zion-Mount Carmel Highway and Tunnel.
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Emergency Exit Guidance for U.S. Highway Tunnels

Transportation Research Record: Journal of the Transportation Research Board, 2016
This research project focused on determining effective messages for encouraging drivers to leave their vehicles and evacuate a tunnel on foot, determining sign and marking formats that most effectively lead people to emergency tunnel exits, and determining the most visible sign and marking materials and technologies for use in highway tunnel ...
Laura Higgins, Stephen Rozyckie, Jeffrey D. Miles, Paul Carlson   +3 more
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Finding optimal ventilation control for highway tunnels

Tunnelling and Underground Space Technology, 2007
A control scheme for highway tunnels is designed based on a static model of the highway tunnel. The controller is designed to keep the exhaust levels inside the tunnel below given limits. The control is then simulated on a dynamical model of a highway tunnel.
Ferki, Lukáš, Meinsma, Gjerrit
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Carbon Emission Transition of Highway Tunnel Construction

2021
Different from ground engineering, tunnel is highly influenced by surrounding rock. However, surrounding rock has never been mentioned in previous published studies on carbon emissions in tunnels. In order to evaluate the effect of surrounding rock conditions on carbon emissions, this study expounded the relationship between tunnel designs and rock ...
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Prevention and Control of Highway Tunnel Fires

1984
This study investigates steps that can be taken to reduce the risk, damage, and fatalities from fires in existing and future highway tunnels and the effect of unrestricted transit of hazardous materials through them. The history of highway tunnel fires is examined to discover the design and operating features bearing on ignition, spread, detection ...
Egilsrud, Philip, Sverdrup & Parcel and Associates   +1 more
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Highway tunnel safety detection and management

城市建设理论研究—建筑结构
Highway tunnel is an important part of highway engineering, and its safety detection and management play a pivotal role in the construction and maintenance process of the whole project. However, due to the particularity of the tunnel itself, the engineering quality is difficult to guarantee, and there are many safety risks.
Weifeng Yue, Hongyan Liu, Liangyou Song
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