Structure for relieving tunnel micro-pressure waves

Abstract

The invention provides a tunnel micro-pressure wave relieving structure which comprises an arch-shaped body, the arch-shaped body is provided with an inlet and an outlet, the outlet is in butt joint with the tunnel inlet, the edge of the inlet of the arch-shaped body is provided with a plurality of grooves, the grooves are used for increasing the incidence space angle so as to improve the relieving effect of tunnel micro-pressure waves, the number of the grooves is more than one, and the number of the grooves is more than one. And the edge of the inlet of the arched body is saw-toothed. According to the scheme for relieving the tunnel micro air pressure waves, the requirement that a higher-speed train smoothly and safely passes through the tunnel on the basis of the existing railway tunnel is met, the relieving effect can be enhanced while the longitudinal size and the structural strength of an existing buffering structure are not obviously changed, and construction is facilitated.

Description

technical field [0001] The invention relates to the field of aerodynamics of high-speed trains, in particular to a structure for relieving micro-pressure waves in a tunnel. Background technique [0002] When the train enters the tunnel, the airflow inside the tunnel cannot be expelled in time due to the viscous effect and the friction effect of the inner wall of the tunnel, and the severe pressure change causes an initial compression wave in the tunnel. The initial compression wave is radiated outward in the form of pulse wave, that is, the micro-pressure wave at the tunnel outlet. Micro pressure waves have a serious impact on the environment of residents near the tunnel. The aerodynamic effects of passing through the tunnel become more pronounced as the train travels at higher speeds. When a train with a higher designed speed runs on an existing line, the existing tunnel buffer structure can no longer effectively alleviate the aerodynamic effect of the train passing throu...

AI Technical Summary

Problems solved by technology

When a train with a higher design speed runs on an existing line, the existing tunnel buffer structure can no longer effectively alleviate the aerodynamic effect of the train passing through the tunnel at this speed level, and cannot meet the existing railway tunnel standards

In order to alleviate the aerodynamic effect caused by high-speed trains passing through the tunnel, a series of optimized improvements have been made to the tunnel buffer structure in the prior art, but the improvement effects for tunnels in different conditions are not the same, and it is even difficult to achieve satisfactory results

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