Results 231 to 240 of about 248,542 (278)
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Smoke Control in Subway Tunnel Fires
Applied Mechanics and Materials, 2014This paper concerns the smoke control modes and the critical ventilation velocity when the subway tunnel on fires. The standard for the smoke control mode is making sure the smoke exhausting in the shortest way. The critical ventilation velocity means it is just sufficient to prevent the smoke spreading upstream. The critical velocity in different heat
Xiao Xiong Zha +3 more
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Artificial Freezing for by-Pass of Subway Tunnel
2020Artificial freezing method is a special construction method for geotechnical engineering, which freezes the water in the soil around the underground excavation space into ice with artificial refrigeration technology. The soil and ice will be cemented together to form a freezing wall or a closed underground space, which can isolate the groundwater and ...
Zhen-Dong Cui +5 more
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3D deformation monitoring of subway tunnel
2008In order to alleviate the pressure of the ground transportation, urban subway has been programmed or built in big cities. As a kind of modern transportation facilities, subway has shown us the advantages of safety, speediness, low power consumption, low pollution etc. It has been the main part of the Beijing’s high-capacity public traffic system. Along
S Yang, K Zhou, D Qiu, Y Ding, Q Liang
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Design of Autonomous Navigation System for Quadrotor in Subway Tunnel
2020 IEEE 16th International Conference on Control & Automation (ICCA), 2020Aiming at the subway tunnel environment with weak light and no GPS signal, we build a hardware platform of quadrotor based on lidar, airborne upper computer and bottom flight control board. Combined with HectorSLAM technology, we also design a route planning algorithm based on the improved Rapidly-exploring Random Tree (RRT) and Artificial Potential ...
Yan Zhou +4 more
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Heat transfer in shallow subway tunnels
Journal of Mining Science, 2008The in situ test data on the evaluation of temperatures in tunnel lining and lining-adjacent soil are presented for shallow subways located in the severe continental climate conditions. The procedure for calculating heat balance in the tunnels is proposed.
A. M. Krasyuk, I. V. Lugin
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Simulation and optimization of subway tunnel profiles
2006 IEEE International Symposium on Industrial Electronics, 2006This paper describes how the longitudinal profile between two railway station platforms can be subjected to an energy minimization process. The preferred minimization method is an evolution by genetic algorithms (GAs). Two processes are first described: the GA process and the profile coding process prerequisite to optimization by GAs.
Francois Ruelland, Kamal Al-Haddad
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The subway tunneling technique for distal shunt catheter insertion
British Journal of Neurosurgery, 2019Dear Editor,We read with interest the article by Osman et al. titled ‘Trocar assisted distal shunt tube insertion with intra-operative X-Ray confirmation’.
Giuseppe R. Giammalva +6 more
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Tunnel Leak Remediation at the Toronto Subway
Trends in Rock Mechanics, 2000The spring of 1997 marked the beginning of a professionally engineered, state-of-the-art remediation grouting program at the Toronto transit Commission (TTC) A Tunnel Leak Remediation program was developed with the objective of stopping the water infiltration problems that plagued the Toronto subway tunnels since their construction.
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Calculation of Tunnel Ventilation in Shallow Subways
Journal of Mining Science, 2005A procedure is proposed to determine the tunnel fan capacity taking into account the area of passenger spaces in stations, traffic flow, and traffic working intensity. The calculation results and experimental data are presented to substantiate possible use of air disturbances due to a piston action of trains moving in tunnels for ventilation of shallow
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