Ground rectification and retracement method for metro operating tunnel

Abstract

The invention discloses a ground rectification and retracement method for a metro operating tunnel. The method comprises the steps that 1, upper covering soil is unloaded; 2, whether horizontal rectification is needed or not is judged, if horizontal rectification is needed, the third step is executed, otherwise, the fourth step is executed; 3, punching is conducted on the designated distance of the horizontal displacement side of a tunnel zone to be treated, and grouting is conducted in a hole on the ground through a sleeve valve pipe grouting technology to achieve horizontal rectification; 4, whether vertical rectification needs to be conducted on the tunnel zone to be treated or not is judged, if vertical rectification is needed, the fifth step is executed, otherwise, the sixth step is executed; 5, oblique punching is conducted on the two sides of the tunnel zone to be treated to the lower side of the tunnel zone to be treated, and grouting is conducted in holes on the ground through the sleeve valve pipe grouting technology to achieve vertical rectification; 6, rectification is finished and it comes time to quit. The ground rectification and retracement method of the metro operating tunnel has the advantages of being small in operation difficulty, simple in construction technology, wide in operation space, strong in working procedure controllability, high in implementation efficiency, high in safety performance and free of influence on metro operating.

Description

technical field [0001] The invention relates to a ground deviation correction and callback method for subway operation tunnels, which is suitable for complex geological conditions such as silt and clay layers, adopts earthwork unloading and sleeve valve pipe grouting technology, and corrects the existing operation subway shield tunnel section. Uneven horizontal and vertical displacements and stress states of segments are rectified. Background technique [0002] At present, due to the influence of geology and surrounding environment, the subway tunnel sections of major cities in China have different degrees of settlement and displacement. There have been vertical callbacks for subsidence subways using grouting in the tunnel. The operation is difficult, the construction space is small, and the construction time can be shortened. Short, it can only be carried out during the outage phase of the subway tunnel at night. Contents of the invention [0003] The technical problem t...

AI Technical Summary

Problems solved by technology

[0002] At present, due to the influence of geology and surrounding environment, the subway tunnel sections of major cities in China have different degrees of settlement and displacement. There have been vertical callbacks for subsidence subways using grouting in the tunnel. The operation is difficult, the construction space is small, and the construction time can be shortened. Short, can only be carried out during the night subway tunnel outage phase

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