Fan setting method for highway tunnels with ramps at entrances and exits
A technology for highway tunnels and entrances and exits, which is applied in the field of fan installation in highway tunnels with ramps at entrances and exits, and can solve the problems of high calculation costs, long calculation periods, and high construction costs
Active Publication Date: 2018-02-23
ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the disadvantages of long calculation period, high calculation cost and high construction cost in the prior art for selecting the axial flow fan and the air supply axial flow fan, and provide a fast calculation speed, high calculation precision, effective Fan setting method for road tunnels with ramps at entrances and exits that saves construction costs
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[0090] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0091] Such as figure 1 , figure 2 , image 3 The illustrated embodiment is a fan setting method for a road tunnel with a ramp at the entrance and exit. The road tunnel 5 includes an entrance ramp section 1, n-1 intermediate sections 2 and an exit ramp section 3 arranged in sequence, and the entrance ramp section includes an entrance trunk road 11 and the entrance ramp 12 with an included angle of β with the main entrance road, and the exit ramp section includes an exit main road 31 and an exit ramp 32 with an angle α with the main exit road; each pair of adjacent intermediate sections is provided with a shaft at the junction 4. Each shaft and each intermediate section are numbered in sequence from the entrance to the exit of the road tunnel; CO concentration detection devices are installed on the main entrance road, entrance ramp, each inte...
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The invention discloses a method for arranging a fan in the highway tunnel with a ramp at the entrance and exit.The highway tunnel comprises an entrance ramp section, n-1 middle sections which are arranged sequentially and an exit ramp section, the entrance ramp section comprises an entrance main street and an entrance ramp at an included angle of beta with the entrance main street, and the exit ramp section comprises an exit main street and an exit ramp at an included angle of alpha with the exit main street; a vertical shaft is arranged at the juncture of every two adjacent middle sections, and the vertical shafts and the middle sections are numbered according to the sequence from the entrance to the exit of the highway tunnel; CO concentration detection devices are arranged on the entrance main street, the entrance ramp, all the middle sections, the exit ramp and the exit main street.The method for arranging the fan in the highway tunnel with the ramp at the entrance and exit has the advantages that the calculation speed and the calculation accuracy are high, and the construction cost is effectively saved.
Description
technical field [0001] The invention relates to the technical field of road tunnel operating ventilation systems, in particular to a fan setting method for road tunnels with ramps at entrances and exits, which has fast calculation speed, high calculation accuracy, and effectively saves construction costs. Background technique [0002] There are two types of ventilation in highway tunnels: natural ventilation and mechanical ventilation. If the tunnel is short, the exhaust gas can be discharged by the traffic piston wind, and natural ventilation can be used. Usually, when the length of the two-way traffic tunnel (m)×design traffic volume (vehicle / h)<6×105, and the length of the one-way traffic tunnel (m )×design traffic volume (vehicle / h)<2×106, natural ventilation can be used, and mechanical ventilation should be used in other cases. Mechanical ventilation uses fans to forcibly discharge the exhaust gas in the tunnel. The ventilation methods are currently classified in...
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IPC IPC(8): E21F1/08
CPCE21F1/08
Inventor 项小强吴德兴李伟平朱益军
Owner ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD