Vertical in-tunnel construction method of multilayer transverse channel of underground excavation station of metro, and construction method on east side and west side

Abstract

The invention discloses a vertical in-tunnel construction method of a multilayer transverse channel of an underground excavation station of a metro. The vertical in-tunnel construction method comprises the following steps: a, excavating a silo till below a bottom elevation of the transverse channel at the first floor, and temporarily sealing the bottom of the silo through section steel and C20 net spraying concrete; and b, setting up a working platform to carry out surveying and lining, and releasing a horsehead of the transverse channel at the first floor to excavate a contour line so as to complete construction of the transverse channel at the first floor. When the horsehead at the lower-layer transverse channel is destroyed, a ring is formed in the horsehead, so that deposition caused by break of the horsehead is reduced, that is to say, risk of breaking the horsehead is greatly reduced through a manner of forming the ring in the transverse channel and then breaking the horsehead.

Description

technical field [0001] The invention relates to a method for vertically entering a hole in a multi-layered cross passage of a subway underground excavation station. Background technique [0002] Subway underground excavation stations are buried shallowly under urban roads, and shafts need to be excavated under the ground to create a working face to organize construction. However, the location of the road does not meet the conditions for excavating shafts, so shafts must be excavated on the side of the subway station according to the conditions of the project. , and then excavate a horizontal passage from the vertical shaft to the station, and open up the working face into the subway station from the horizontal passage. [0003] The vertical shaft is generally located on both sides of the main structure of the station. The depth of the vertical shaft depends on the buried depth of the main structure of the station, and it is about 1.5 meters deeper than the horizontal channel...

AI Technical Summary

Problems solved by technology

[0007] With the development of urban rail transit, underground excavation stations are gradually increasing, and the above-mentioned multi-layer horizontal passage Matoumen entry hole construction method still has shortcomings such as slow speed, high safety risk, and large material input.

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