Construction method suitable for ventilation system of super-long highway tunnel

Abstract

The invention discloses a construction method suitable for a ventilation system of a super-long highway tunnel. The ventilation system comprises a first tunnel, a second tunnel and an underground fanroom, wherein the underground fan room is provided with an air feeder and an exhaust fan, and an air supply inclined shaft and an exhaust inclined shaft which are excavated downwards from the ground are arranged on the outer side of the underground fan room; and the air supply inclined shaft and the air exhaust inclined shaft correspondingly communicate with two connection air ducts, wherein eachconnection air duct correspondingly communicates with the first tunnel and the second tunnel for air supply and exhaust, and a transportation channel, a first evacuation channel and a second evacuation channel are further arranged between the underground fan room and the second tunnel. During construction, construction is conducted according to the sequence that a highway tunnel and the lower connection air duct are firstly arranged and the upper connection air duct is secondly arranged. According to the construction method suitable for the ventilation system of the super-long highway tunnel,the overall structure is compact, ventilation requirements when the tunnel operates normally and under special working conditions such as fire disasters can be completely met; and meanwhile, through reasonable construction organization, the construction efficiency can be improved, the construction period can be shortened, and construction investment can be greatly saved.

Description

technical field [0001] The invention relates to the technical field of tunnel ventilation, in particular to a construction method suitable for a ventilation system of an ultra-long highway tunnel. Background technique [0002] Since the 1990s, China has entered a period of rapid development of road construction. Extra-long tunnels have greatly improved the efficiency of vehicle traffic by cutting bends and straightening, and have advantages that other transportation lines cannot match. However, due to the complex structure of the tunnel building, the airtight environment, and the long smoke exhaust section, the concentration of pollutants in the tunnel exceeds the standard. It has the following advantages: the applicable tunnel length is not limited in non-fire conditions, and the noise is very small; the smoke exhaust efficiency is high in fire conditions, which can greatly reduce casualties and property losses. Normally, as the length of the tunnel increases, the number o...

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Problems solved by technology

[0003] Aiming at the problems of complex structure and difficult construction of the existing double-hole ultra-long tunnel with a length of 8000-12000m, the present invention provides a construction method suitable for a ventilation system of an ultra-long road tunnel, and specifically the following technical solutions can be adopted:

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