Method for ventilation within range of large-shield subway station without forming air shaft

Abstract

The invention relates to the technical field of subway large shield, in particular to a method for ventilation within the range of a large-shield subway station without forming an air shaft. Within the range of the station, in combination with a large-shield station form, the station is arranged as an upper station hall floor and a lower station platform floor; the two ends, within the range of the large-shield station, of a public section are provided with large-shield equipment sections, large-shield interval sections are arranged outside the range of the large-shield station, the second floors underground of the large-shield interval sections are arranged as large-shield lower floor interval tunnels, the first floors underground of the large-shield interval sections are arranged as independent large-shield upper floor civil smoke exhaust ducts, and smoke exhaust fans and air valves are arranged in the large-shield upper floor civil smoke exhaust ducts; and a tunnel ventilation air shaft is formed in an open-cut shaft section outside the large shield range, a tunnel fan and an air valve are arranged in the tunnel ventilation air shaft, and a piston air shaft is formed in the ground. The problem of forming of the ventilation air shaft within the range of the large-shield station is solved, the air shaft out of the ground is preferentially formed by combining with the ground condition of a whole line, the engineering implementability of the large-shield station can be effectively improved, whole-line removal is reduced, and the engineering construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of subway large shield tunneling, in particular to a ventilation method without an air shaft within the range of a large shield subway station. Background technique [0002] At present, domestic subway stations are mainly constructed by open-cutting, underground excavation, and combination of open-cutting and other methods. The intervals are mainly implemented by underground excavation and small shield tunneling with a diameter of 7m or less. The surrounding areas of subway stations are mostly densely populated and building areas, and the ground traffic Often large, the construction process mainly faces difficulties such as traffic diversion, pipeline relocation, and house demolition. [0003] The subway mainly adopts the smoke exhaust method of key smoke exhaust at the station + vertical smoke exhaust at the interval. The air shafts are installed around the subway stations, which are generally densely popul...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the defects and insufficiencies of the prior art, to provide a well-designed ventilation method without setting air shafts within the scope of large shield subway stations, and to solve the problem of setting ventilation shafts within the scope of large shield tunnel stations. The ground air wells are optimally set in combination with the ground conditions of the entire line, which can effectively improve the engineering feasibility of the large shield station, reduce the demolition of the entire line, and save the construction cost of the project

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