Mechanical breaking construction method for use as shield tunneling machine reached tunnel portal

Abstract

The invention relates to a mechanical breaking construction method for shield machine achieving tunnel portal, comprising following procedures that when the shield machine achieves the outside of shield receiving well and the tip of fish cutter on the cutter head is against the outside of protective mechanism, the shield machine stops digging temporarily; the gun for chiseling the portal is hung into the shield well from the ground by mechanism, and then the gun is used to chisel the protective structure in portal range mechanically; when the portal is chiseled, the gun is hung from the shield well by mechanism and the shield machine achieves receiving well. In the invention, because the mechanical breaking construction method is used and the gun is used to chisel the protective structure in portal range directly, it is safe and rapid, the danger of portal collapse is decreased, the construction period is only one day or two days, rapid and simple process is ensured, there is no need to move in reducing speed when the shield machine achieves and tunnel construction progress is quickened. After the chiseling for portal is finished the shield machine can enter into the shield machine achieving well directly so as to achieve the purpose of invention.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for a shield machine to break through a tunnel opening. Background technique [0002] In many fields of shield tunneling construction, before the shield machine reaches the tunnel, the enclosure structure of the shield receiving shaft must be chiseled before the shield tunnel can reach the tunnel. The previous method is to manually break the tunnel door. , that is, to destroy the steel bars and concrete of the enclosure structure within the scope of the portal, and the construction period generally takes 15 to 20 days. Due to the long construction time, there is a risk of collapse of the enclosure structure during the demolition process; For the door method, when designing the length of the shield machine to reach the reinforcement area, it is generally considered that the construction needs to be 8-10m long, resulting in high reinforcement costs, and th...

AI Technical Summary

Problems solved by technology

[0002] In many fields of shield tunneling construction, before the shield machine reaches the tunnel, the enclosure structure of the shield receiving shaft must be chiseled before the shield tunnel can reach the tunnel. The previous method is to manually break the tunnel door. , that is, to destroy the steel bars and concrete of the enclosure structure within the scope of the portal, and the construction period generally takes 15 to 20 days. Due to the long construction time, there is a risk of collapse of the enclosure structure during the demolition process; For the door method, when designing the length of the shield machine to reach the reinforcement area, it is generally considered that the construction needs to be 8-10m long, resulting in high reinforcement costs, and the shield machine needs to slow down 50m before arriving, which seriously affects the tunnel. construction progress