Tunnel connecting passage construction method for directly cutting segment rings through pipe jacking machine

Abstract

The invention discloses a tunnel connecting passage construction method for directly cutting segment rings through a pipe jacking machine. The method comprises the following steps: respectively assembling a plurality of special segment rings in preinstallation positions of a first tunnel and a second tunnel, performing tunnel exit preparation for the pipe jacking machine, cutting the special segment rings for tunnel exit through the pipe jacking machine, propelling the pipe jacking machine, performing tunnel entrance preparation for the pipe jacking machine before the pipe jacking machine reaches the second tunnel, cutting the segment rings for tunnel entrance through the pipe jacking machine to form a connecting passage, plugging a tunnel opening, and ensuring that the connecting passage is respectively connected with the first tunnel and the second tunnel. As the method is adopted, the tunnel connecting passage construction risk can be effectively reduced, the tunnel connecting passage construction safety is guaranteed, and simultaneously, the tunnel connecting passage construction speed is increased, and the method has the characteristics of safety, reliability, convenience, high efficiency, long construction distance and high applicability.

Description

technical field [0001] The invention relates to a construction method, in particular to a construction method for directly cutting a segment tunnel for jacking pipes. Background technique [0002] The communication channel is a humanized design for the rapid and safe evacuation of personnel to another tunnel through the established connecting channel in case of abnormal conditions such as fire in one tunnel during normal operation of the tunnel. Generally, when the length of the tunnel in the two-line subway section is greater than 1km, it is necessary to set up a connecting channel. For longer river bottom tunnels, there are generally multiple communication channels. The construction methods of communication passages mainly include: open cut method, pipe shed method, soil reinforcement and underground excavation method, pipe jacking method, small shield method, etc. In the Shanghai area, the underground excavation method for soil reinforcement and the pipe jacking method ...

AI Technical Summary

Problems solved by technology

The "pipe jacking machine" used in this process is a simple on-site equipment that cannot effectively control the stability of the excavation surface and control the advancing axis

In addition, the outside of the original tunnel steel sheet where the passage is located needs to be reliably reinforced with soil. After the steel sheet is removed during the exit and entry stages of the "pipe jacking", once the soil reinforcement has defects, the soil will still collapse. , water gushing or even endanger the safety of the entire tunnel, especially for deep tunnels, because of the high water and soil pressure, it is more likely to cause accidents such as soil collapse

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