Construction technology of cast-in-place portal support in subway station

Abstract

The invention provides a subway station cast-in-situ concrete structure door-like scaffold construction process, and belongs to the field of subway construction. Door-like scaffolds serve as the supporting system during pouring of middle plates in the third floor underground of a station. The door-like scaffolds refer to the structure that the door-like scaffolds are arranged in the range from the position 2.15m away from one side of the center line of a rail line region in the third floor underground of the station to the position 2.15m away from the other side of the center line of the rail line region in the third floor underground of the station and from a bottom plate to the position 4.905m above the bottom plate and are composed of one stand column, one cross beam, two inclined struts and pre-buried steel plates. The cross beam and station structure side walls are connected and fixed through the pre-buried steel plates, and the vertical column is connected with the bottom plate and the cross beam through bolts respectively. The door-like scaffolds are arranged in the direction of a track every 90cm and are connected through steel pipes arranged in the direction of the track. On the premise that safety is guaranteed through the supporting system, effective space is provided for matching and assembling within the station rail line region after a shield method is applied, the purpose of shortening the construction period is achieved, and it is made possible that well shield machine assembling and debugging are achieved and a station structure with a starting condition is provided. The construction period is shortened by 30%, and the cost is saved by 10%.

Description

technical field [0001] The invention relates to a construction technique of using a door-type bracket for a mid-slab support system of a cast-in-place structure within the range of a railway track area of ​​a subway Gulou Street Station. The shield tunneling section on the left line of the section from Andli North Street Station to Gulou Street Station starts and excavates from the shield tunnel at the north end of Gulou Street Station. The left line of the track area on the negative third floor of the station needs to provide an 80m-long shield machine behind the supporting assembly space, and the support system of the middle plate of this layer adopts portal brackets. Background technique [0002] At present, the cast-in-place concrete mid-slab support system in the subway construction of rail transit projects generally adopts the full house scaffolding process. However, the full house scaffolding could not be dismantled until the structure was fully completed, making it ...

AI Technical Summary

Problems solved by technology

However, the full house scaffolding could not be dismantled until the structure was fully completed, making it impossible to carry out other operations inside the station

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