Results 161 to 170 of about 803,318 (230)

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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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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Evaluation of Fire Risk at Highway Tunnels

ICCTP 2009, 2009
The purpose of this study is to prevent and reduce fire at highway tunnels. This paper systematically analyzes the influence factors for the safety system of highway tunnels, establishes a risk assessment model for tunnel fire based on analytic hierarchy process and multi-grade fuzzy evaluation, and introduces a risk factors assessment system for ...
Jing Huang, Shao Yun Ren, Wei Zhang
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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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Mechanical characteristics of primary support of large span loess highway tunnel: A case study in Shaanxi Province, Loess Plateau, NW China primary

, 2020
When a large span loess tunnel is excavated, the rock mass is disturbed, and it is difficult to form a load-bearing arch under shallow depth region. As a result, the structural deformation is complicated.
Yanbin Luo, Jianxun Chen, Zhou Shi, Juzhu Li, Weiwei Liu   +4 more
semanticscholar   +1 more source

On the determination of the aerodynamic coefficients of highway tunnels

Journal of Wind Engineering and Industrial Aerodynamics, 2002
Abstract The determination of the aerodynamic coefficients of highway tunnels is crucial to set up an accurate theoretical model of tunnel ventilation. Their appropriate values vary with situations, such as traffic conditions, auxiliary facilities in tunnel, jet fan performance, and so on, and accordingly shall be determined in real situations.
Hong-Ming Jang, Falin Chen
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In-tunnel pollutant concentration measurement and ventilation control indexes for highway tunnels in mountainous area: A case study of no.1 Qinling tunnel, China.

Science of the Total Environment
The concentration of pollutants and hygiene standards in mountain tunnels are key factors determining the ventilation effectiveness of tunnel operation. Previous studies have mainly focused on the spatiotemporal distribution patterns of pollutants, while
Jianxun Chen, Yanbin Luo, Tengfei Fang, Xinyu Zhang, Weiwei Liu, Chuanwu Wang   +5 more
semanticscholar   +1 more source

Maintenance and control of the Kanmon highway tunnel

Tunnelling and Underground Space Technology, 1986
Abstract Kanmon Highway Tunnel is a 3.5-km-long undersea road tunnel linking Honshu Mainland and Kyushu Island under the Kanmon Straits. Carrying a traffic volume of approx. 25 000 cars per day, the tunnel plays an important role as a main trunk road (National Highway Route 2).
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Research of Ventilation Design for Highway Tunnel

2011 International Conference on Management and Service Science, 2011
The gas of vehicle emissions contains large amounts of harmful gases. To sustain the quality of the air in tunnel, we need ventilation, which is a systematic project. We should take into account not only construction costs For ventilation planning, but also should consider the development of future maintenance and management of the transport costs and ...
Min Huang, Bing-yu Pan
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Application of Information Construction in Highway Tunnel

2010 International Conference of Information Science and Management Engineering, 2010
The practical application of basic principles of information construction in highway tunnel was introduced in this paper. An information construction model of highway tunnel was established by accessing to site data and inversing the surrounding rock parameters and optimizing the construction parameters and so on.
Zhengfa Chen, Guifeng Liu
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