<<
[an error occurred while processing this directive] | [an error occurred while processing this directive] >>
Impact of Shaft Types on the Ventilation Effect in Urban Road Tunnels
(1 Tianjin University, Tianjin 300072; 2 Tianjin HP Data Center Design & Engineering Co. Ltd., Tianjin 300457;
3 Tianjin Municipal Engineering Design & Research Institute, Tianjin 300051)
Abstract Based on a tunnel practice, the ventilation effect of the shaft during traffic clogging in a tunnel with ventilation shaft is studied through a model test. The research results show that ventilation shaft presents a character of cyclical transition between air intake and air exhaust with small air quantities when natural ventilation due to low speed movement of vehicles is used; and air exhaust rate of rectangular shaft increases with the increase of cross-section equivalent diameter while air exhaust rate increases with the decrease of slope angle of ventilation shaftwhen a combination of jet fan and traffic induced air is used to keep a constant state of air exhaust.
Abstract：
Based on a tunnel practice, the ventilation effect of the shaft during traffic clogging in a tunnel with ventilation shaft is studied through a model test. The research results show that ventilation shaft presents a character of cyclical transition between air intake and air exhaust with small air quantities when natural ventilation due to low speed movement of vehicles is used; and air exhaust rate of rectangular shaft increases with the increase of cross-section equivalent diameter while air exhaust rate increases with the decrease of slope angle of ventilation shaftwhen a combination of jet fan and traffic induced air is used to keep a constant state of air exhaust.
CUI De-Zhen-1,
Xing-Jin-Cheng-1,
Ling-Ji-Hong-1 etc
.Impact of Shaft Types on the Ventilation Effect in Urban Road Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(6): 136-141
2014, Vol. 51 