Underground excavation station arch bridge type arc-shaped middle plate construction method

Abstract

The invention provides an underground excavation station arch bridge type arc-shaped middle plate construction method. According to the method, arch bridge type arc-shaped middle plate construction isdivided into a plurality of construction sections, and for each construction section, the following steps of S1), completing arch excavation of a station and lining construction of an arch cover; S2), completing excavation construction of the lower cross section of a station main body by adopting a step method, and completing structural construction of an inverted arch and parts of the side wallsin side walls; S3), erecting formworks of the remaining parts of the side walls, and binding steel bars in the formworks of the remaining parts of the side walls; S4), erecting formwork supports of an arc-shaped middle plate by adopting a full framing, erecting a formwork of the arc-shaped middle plate on the top surfaces of the formwork supports, and binding steel bars in the formwork of the arc-shaped middle plate; S5), sequentially pouring the formworks of the remaining parts of the side walls and the formwork of the arc-shaped middle plate; S6), erecting formworks of straight section axillary angle supports of rail top air duct parts of the arc-shaped middle plate on the top face of the arc-shaped middle plate and the top faces of the remaining side walls; and S7), pouring the formworks of the straight section axillary angle supports to form straight section axillary angle supports are included.

Description

technical field [0001] The invention relates to the technical field of underground excavation station construction, in particular to a construction method for an arch bridge type arc-shaped middle plate of an underground excavation station. Background technique [0002] With the continuous development of urban subways, passengers are increasingly demanding various functions of the station, especially in the public area of ​​the station platform, where the flow of passengers is complex and the requirements for space and utilization are extremely high. Traditional stations adopt single (double) In the mode of column, flat-bottom middle plate, and hanging square rail top air duct, the column grid and the middle plate, the middle plate and the rail top air duct cannot be poured at one time, the construction is cumbersome, the process is complicated, and the construction period is long. The artificial cutting of space greatly reduces the utilization rate of space, which is a prob...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of urban subways, passengers are increasingly demanding various functions of the station, especially in the public area of ​​the station platform, where the flow of passengers is complex and the requirements for space and utilization are extremely high. Traditional stations adopt single (double) In the mode of column, flat-bottom middle plate, and hanging square rail top air duct, the column grid and the middle plate, the middle plate and the rail top air duct cannot be poured at one time, the construction is cumbersome, the process is complicated, and the construction period is long. The artificial cutting of space greatly reduces the space utilization rate, which is a problem that plagues on-site construction and later operation

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