Double-hole one-way long and large underwater highway tunnel ventilation system and ventilation method thereof

Abstract

The invention discloses a double-hole one-way long and large underwater highway tunnel ventilation system. The double-hole one-way long and large underwater highway tunnel ventilation system comprises a pilot tunnel or a service tunnel arranged between two main line tunnels, and main line tunnels are provided with a first shoreside ventilation shaft and a second shoreside ventilation shaft communicating with the two main line tunnels at two shoresides of a water area respectively; the first shoreside ventilation shaft is provided with a first air supply shaft and a first air exhaust shaft communicating with the ground atmosphere; the second shoreside ventilation shaft is provided with a second air supply shaft and a second air exhaust shaft communicating with the ground atmosphere; sections of the main line tunnels are provided with a traffic lane, a top space of the traffic lane is a discharge flue, a plurality of jet fans are hung at a top part of the traffic lane, a water area air feeder room is arranged between the main line tunnel and the service tunnel or the pilot tunnel, the first first air supply shaft, the second air supply shaft and the water area air feeder room are internally provided with air feeding fans and air feeding valves; and a water area exhaust valve is arranged between a discharge flue and the main line tunnel. The invention further discloses a corresponding ventilation method. The system has advantages of a good ventilation effect, safe operation, low cost and efficient civil engineering structure utilization.

Description

technical field [0001] This patent relates to the field of highway tunnel ventilation, in particular to a ventilation technology and method for a double-hole one-way long underwater highway tunnel. Background technique [0002] At present, my country has become the country with the largest number of tunnel projects, the most complex and the fastest development in the world. While the construction of highway tunnels brings convenience to economic development and people's production and life, it also puts forward higher requirements for the safe and green operation of tunnels. When vehicles pass through the tunnel, they will emit a large amount of exhaust gas such as carbon monoxide and nitrogen oxides. At the same time, they will release waste heat and bring a certain amount of dust pollution. For long tunnels with long closed sections and large traffic flows, mechanical Ventilation measures are used to ensure the cleanliness of the environment in the tunnel, so that it can ...

AI Technical Summary

Problems solved by technology

[0005] 1) The air volume required in the tunnel is positively correlated with the length of the tunnel. According to the "Design Rules for Highway Tunnel Ventilation", the maximum design wind speed in the tunnel should not be greater than 8.0m / s", so there is a certain limit on the length of a single ventilation section

[0006] 2) High energy consumption in operation

With the lengthening of the ventilation section, the required air volume will continue to increase, the installed power of the ventilation equipment will also increase, and the operating energy consumption will also increase significantly

[0007] 3) The construction of shafts in water areas is difficult and requires high investment

In some projects, due to the limitation of the section of the shaft, for the ultra-long underwater tunnel, it is necessary to set up artificial islands in the water area at intervals of a certain kilometer, and then set up the ventilation shaft, which has the problems of high construction difficulty, high construction risk, and high civil construction investment

[0008] 4) It is difficult to use and approve shafts in water areas

The setting of shafts in the water area will have a great impact on the ecological environment of the water area, and at the same time, there will be problems affecting navigation

Images