Method for reducing tunnel shock waves and tunnel device capable of reducing shock waves
A shock wave and tunnel technology, which is applied in mining equipment, earthwork drilling, iron oxide and other directions, can solve the problems of unblocking shock waves and cannot be used, and achieves the effects of easy ejection, simple equipment and rapid depressurization.
Pending Publication Date: 2021-12-21
CHANGAN UNIV
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Problems solved by technology
[0004] In the prior art, reflective baffles are arranged in the tunnel, which are used during blasting during the construction of the tunnel, but cannot block the shock wave when it is open to traffic
The way of baffle and door sealing can only be used for blasting shock wave protection during the tunnel construction period, and cannot be used for the driving period
Method used
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Embodiment 1
[0031] Embodiment 1. The reducing agent solution is composed of the following components by weight percentage: iron powder 5-50%, copolycarboxylate 0.1%-5%, isomeric alcohol polyoxyethylene ether 0.1%-5%, isomeric alcohol polyoxyethylene Vinyl ether 1% to 2%, polyether siloxane copolymer 0.1% to 1%, sodium carbonate, sodium bicarbonate or ammonia water 0.1% to 1%, and appropriate amount of water. The content of the iron powder in the suspension is based on the principle that it is easy to flow and difficult to stratify and segregate. Preferably, the weight percentage of the iron powder is 10-30%.
[0032] In practice, the reducing agent can also be compounded with iron powder, aluminum powder, etc. The compounding principle is based on the best cost performance.
[0033] Further, the preset distance is 5-200 meters. The control switch is a motion sensor or a photoelectric switch. In practice, the preset distance can be flexibly selected according to the sensitivity of the c...
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Abstract
The invention discloses a method for reducing tunnel shock waves. The method comprises the following steps that firstly, the interior of a tunnel is divided into a first control interval, a second control interval, ..., an Nth control interval which are continuous in the advancing direction of a train; secondly, a plurality of nozzles are evenly arranged in the middle of each control interval in the radial direction; a storage tank filled with a liquid reducing agent and a piston pump are arranged in each control interval, a feed port of the piston pump is in communication with the storage tank, and a discharge port of the piston pump is in communication with each nozzle; and thirdly, a control switch is installed at the preset distance in front of a tunnel entrance, the control switch and the piston pump are connected to a controller, and when the train travels to the preset distance in front of the tunnel entrance, the controller controls the piston pump to spray the liquid reducing agent to the center of the tunnel. The invention further discloses a tunnel device capable of reducing the shock waves. The method has the following beneficial effects: 1, the chemical reaction is rapid, and the pressure is rapidly reduced; 2, reactants and products are harmless to the train; and 3, the spraying amount of the reducing agent solution is easy to control.
Description
technical field [0001] The invention relates to the field of tunnel shock wave reduction, in particular to a method for reducing tunnel shock waves and a tunnel device capable of reducing shock waves. Background technique [0002] When the high-speed railway train enters the tunnel, because the air in front of the front of the train is compressed at high speed, a shock wave (pressure pulse can be as high as 10kPa) will be generated, which will be transmitted forward in the tunnel; the body will rub against the surrounding air in the tunnel, and the friction will also be transmitted to the tunnel The pressure change of the inner wall and air flow will also produce huge stress on the tunnel lining material; the rear of the vehicle body will also produce a low-pressure area and vortex; The emitted noise, if surrounded by valleys, will also produce echoes. The shock wave in the tunnel will cause cracks in the lining material of the tunnel, and when the cracks increase, it will ...
Claims
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IPC IPC(8): E21F17/00C01G49/06
CPCE21F17/00C01G49/06
Inventor 李旭牛艳辉夏慧芸艾涛宋莉芳牛冬瑜耿九光
Owner CHANGAN UNIV