Construction Method of Auxiliary Air Duct Structure of Underground Excavation Station

Abstract

The invention discloses a construction method for an auxiliary air duct structure of a submerged excavation station, which at least includes the construction of a station cross passage and an air duct cross passage. The construction steps of the construction method are as follows: step 1, using the method of hanging the shaft wall upside down to construct the air duct out of the ground vertical shaft within the range; Step 2, set up temporary support in the vertical shaft; Step 3, construct the Matou Gate reinforced ring beam; Step 4, set up the advance support of the station cross passage laid at 180° in the arch; Step 5, half side Excavating the cross passage of the air duct; step 6, backfilling the cross passage of the station and the cross passage of the air duct to the bottom plate of the air duct structure, and building back the second lining structure of the air duct to complete the integral structure. Because the invention adopts the underground excavation method to construct the auxiliary air duct structure, and only uses the half side air duct underground excavation as the guide hole of the station cross passage, the construction scale of the underground excavation station cross passage is reduced, the construction period is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of underground engineering construction, in particular to a construction method for an auxiliary air duct structure of an underground excavation station. Background technique [0002] With the rapid and sustainable development of my country's urban economy, urban road traffic conditions are becoming increasingly tense, and underground transportation station transportation has gradually become the main traffic artery for large-capacity rapid public transportation systems. At present, for underground stations, the open-cut method or the underground method is usually adopted. However, due to the large construction area of ​​the open-cut method, the surrounding commercial and residential buildings are dense, the traffic is heavy, and the constraints of dense underground pipelines and underground structures make the application of the open-cut method subject to certain restrictions. [0003] The underground exca...

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Problems solved by technology

[0004] However, the construction of the above-mentioned underground excavation method requires that the construction shaft of the underground excavation station is relatively wide, and the width of the cross passage is usually much larger than the scope of the construction cross passage required by the construction of the station. , high construction cost

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