A railway tunnel that mitigates pressure fluctuations inside the tunnel
An internal pressure and tunnel technology, applied in tunnels, mining equipment, earth-moving drilling, etc., can solve the problems of increasing the weight of the car body, increasing the construction cost, increasing the pressure amplitude, etc., to improve the safety and ride comfort, construction Low cost and good mitigation effect
Active Publication Date: 2022-02-15
CENT SOUTH UNIV
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Problems solved by technology
Trains generally adopt methods of increasing car body strength and airtight design to improve the safety and comfort of the train during operation, but these methods will increase the weight of the car body, which will affect the dynamic performance of the train and increase the cost of manufacturing and operation and maintenance.
[0004] In tunnels, buffer structures, ventilation shafts, etc. are generally installed at the tunnel entrance, and buffer structures can only slow down the gradient of the initial compression wave, thereby reducing the intensity of the micro-pressure wave at the tunnel exit, and have little effect on the huge pressure change amplitude in the tunnel. It will also slightly increase the pressure amplitude, and the installation of the buffer structure is affected by factors such as the topography of the tunnel entrance. For example, the buffer structure cannot be installed at the tunnel entrance of the canyon.
The design of the ventilation shaft is mainly to ventilate the railway tunnel and facilitate emergency rescue, and has a limited effect on alleviating pressure fluctuations in the tunnel
In addition, the aerodynamic effect of the tunnel can be effectively alleviated by increasing the clearance area of the tunnel, but the construction cost will increase significantly
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[0021] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0022] Unless otherwise defined, all technical terms used hereinafter have the same meanings as commonly understood by those skilled in the art. Words such as "one" or "one" used in the specification and claims of the patent application of the present invention do not indicate a limitation of quantity, but indicate that there is at least one. Words such as "connected" or "connected" are not limited to direct connection, but may be indirectly connected through other intermediate connectors. "Up", "Down", "Lef...
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The invention discloses a railway tunnel capable of alleviating pressure fluctuation inside the tunnel, which comprises a tunnel body, a diversion groove is arranged on the tunnel wall of the tunnel body along the length direction of the tunnel body, and the front end of the diversion groove is between the tunnel entrance of the tunnel body The distance between them is 60m‑90m. The railway tunnel has a good mitigation effect on pressure waves, can be reconstructed on the basis of the original tunnel, and has simple construction, low construction cost and high feasibility.
Description
technical field [0001] The invention relates to the technical field of railway tunnel engineering, in particular to a railway tunnel capable of alleviating pressure fluctuations inside the tunnel. Background technique [0002] When the high-speed train enters the tunnel, due to the limited pressure wave diffusion space, similar to a piston mechanism, the front and rear of the train will generate compression waves and expansion waves respectively when they enter the tunnel, and the compression waves and expansion waves will be in opposite forms when they reach the other end of the tunnel. The waves reflected back, and thus generate new pressure waves back and forth, resulting in very drastic pressure changes in the tunnel, seriously affecting the comfort of passengers in the train when the train passes through the tunnel. [0003] Aiming at the severe aerodynamic effect in the tunnel, a lot of research has been done on both trains and tunnels in China. Generally, the strengt...
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IPC IPC(8): E21D9/14
CPCE21D9/14
Inventor 王田天陆意斌杨明智钱博森张雷伍钒
Owner CENT SOUTH UNIV