Natural ventilation method of tunnel sound barrier
A technology of natural ventilation and sound barrier, 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 strengthening Effect of smoke exhaust, improvement of escape environment, and reduction of engineering investment
Active Publication Date: 2015-08-19
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 method for natural ventilation of the tunnel sound barrier proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.
[0026] Such as Figure 1 ~ Figure 4 As shown, the present embodiment provides a natural ventilation method for a tunnel sound barrier, using a tunnel sound barrier natural ventilation system, the tunnel sound barrier natural ventilation system is suitable for two-way traffic tunnels, and the tunnel sound barrier natural ventilation system includes docking The sound barrier 1 at the entrance of the tunnel (not shown in the figure), the soun...
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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, a large number of urban underground tunnels came into being, followed by the impact of tunnel traffic noise on residential buildings, hospitals, schools, etc. around the entrance of the tunnel. Traffic noise pollution at tunnel entrances has gradually become the most concerned environmental pollution issue for residents along the tunnel. 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 traffic noise pollutants at tunnel entrances is to use sound barriers, which can be divided into natural sound barriers, artificially constructed sound barriers and special artificial sound barr...
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Inventor 施孝增
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP