Natural Ventilation Methods for Tunnel Sound Barriers
A natural ventilation and sound barrier technology, which is applied in mine/tunnel ventilation, earthwork drilling, mining equipment, etc., can solve the problems of increased exhaust gas concentration, no positive effect of evacuation and escape, and chaotic flow of sound barrier smoke, etc., to achieve improvement Escape the environment, strengthen the effect of smoke exhaust, and reduce the effect of project investment
Active Publication Date: 2019-12-27
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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Problems solved by technology
However, the actual use effect of this natural vent is not satisfactory
[0004] The reasons for the analysis are as follows: 1) The natural vent is connected to the outside, and part of the sound waves enter the tunnel through the natural ventilation at the top of the sound barrier, and the sound insulation effect is not good; 2) Since the natural vent is set at the top, when traffic The concentration of exhaust gas in the interior increases significantly, fresh air and tunnel exhaust gas can only be introduced and discharged through the same natural ventilation opening, and the exhaust gas dilution effect is not ideal; 3) When a vehicle fire accident occurs in the sound barrier, the natural ventilation opening at the top of the sound barrier is also used as fresh air. The introduction port and the smoke exhaust port cause the smoke flow in the sound barrier to be chaotic, which has no positive effect on the evacuation and escape of personnel
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[0025] The natural ventilation method of the tunnel sound barrier proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and all use imprecise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.
[0026] Such as Figure 1 ~ Figure 4 As shown, this embodiment provides a tunnel sound barrier natural ventilation method, which adopts a tunnel sound barrier natural ventilation system. The tunnel sound barrier natural ventilation system is suitable for two-way tunnels. The tunnel sound barrier natural ventilation system includes The sound barrier 1 at the entrance of a tunnel (not shown), the sound barrier 1 is used as an out...
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The invention discloses a natural ventilation method of a tunnel sound barrier aiming that an existing tunnel sound barrier is not good in sound-roof effect, fresh air and tunnel waste gas can be introduced and discharged through a natural vent heel only, and the waste gas diluting effect is not ideal. A natural ventilation system of the tunnel sound barrier comprises a sound barrier butted to a tunnel opening, the top of the sound barrier is provided with a top natural vent hole, the lower parts of the two sides of the sound barrier are provided with side lower natural vent holes, and the top natural vent hole and the side lower natural vent holes are all built-in with electric sealed valves. The effective organization of air current in the sound barrier and the circulating flow can be realized by a heat pressure difference and an air pressure difference between the top part of the sound barrier and the two side lower electric natural vent holes, the aims of effectively isolating sound, effectively reducing the temperature and waste gas concentration of the tunnel opening and effectively diffusing the flue gas flow in a fire condition can be achieved.
Description
Technical field [0001] The invention relates to tunnels, in particular to a natural ventilation method for tunnel sound barriers, and belongs to the technical field of tunnel ventilation. Background technique [0002] With the development of road traffic and urban infrastructure construction, a large number of urban underground tunnels have emerged as the times require. What follows is the impact of tunnel traffic noise on residential buildings, hospitals, and schools around the entrance of the cave. Traffic noise pollution at the tunnel entrance has gradually become the most concerned environmental pollution problem for residents along the route. In addition, traffic noise also restricts the economic development of the area around the tunnel entrance to a certain extent. [0003] At present, the main method to solve the traffic noise pollutants at the tunnel entrance is to use sound barriers, which can be divided into natural sound barriers, artificially constructed sound barrier...
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IPC IPC(8): E21F1/18
Inventor 施孝增
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP