The Construction Method of Excavating the Station Structure by Tunnel First and Then the Station Pipe-curtain Pile Method

Abstract

The invention discloses a construction method for excavating a station structure by first tunneling and then station pipe curtain hole pile method. During construction, four pilot tunnels are respectively arranged on the upper and lower floors, wherein there is a leading pilot tunnel in the upper layer pilot tunnel, and the preceding pilot tunnel is used to excavate the station structure. As the working space for the installation of pipe curtains, there is no pipe curtain support above the first pilot tunnel and the four lower pilot tunnels, and the primary support is provided with a vaulted straight wall structure. The pilot tunnels are used as side piles and central steel pipe columns. Space, after the installation of the pipe curtain is completed, the remaining three upper pilot holes on the upper floor will be excavated with a flat roof and straight wall structure. It is also suitable for the excavation of shallow and deep buried stations, which ensures that the environmental facilities are almost unaffected, and thus saves economic costs. It has strong economic benefits and social value, and can be widely used in similar projects.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a construction method for excavating a station structure by tunneling first and then station pipe curtain hole pile method. Background technique [0002] In the construction of urban subway projects, due to the difficulty and slowness of the demolition work in the central area of ​​the city, the demolition and relocation cannot be completed on time. As a result, the construction of the subway station section cannot be started according to the planned construction period, or even seriously lags behind, which affects the realization of the goal of running through the entire line. It is necessary to use The tunnel will be constructed first and then the station will be constructed. Most of the existing construction methods are the tunnel first and then the station combined with the open-cut method or the mine method, but the open-cut method will greatly affect the environmental fac...

AI Technical Summary

Problems solved by technology

[0002] In the construction of urban subway projects, due to the difficulty and slowness of the demolition work in the central area of ​​the city, the demolition and relocation cannot be completed on time. As a result, the construction of the subway station section cannot be started according to the planned construction period, or even seriously lags behind, which affects the realization of the goal of running through the entire line. It is necessary to use Tunnel construction followed by station construction

Most of the existing construction methods are the tunnel first and then the station combined with the open-cut method or the mine method, but the open-cut method will greatly affect the environmental facilities such as underground pipelines and the amount of earth excavation is large, the construction process of the mine method is slow, and the construction period is long. Low degree of mechanization, labor-intensive

Therefore, the tunnel pile method combined with the tunnel first and then the station can solve certain problems. However, the traditional tunnel pile method adopts the form of a vaulted straight wall structure, which can solve the problem of a certain amount of earthwork excavation and has relatively little impact on the superstructure, but there are still problems. Issues affecting environmental facilities such as underground pipelines

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