Shield hole-drilling apparatus and hole-drilling construction method thereof

Abstract

The invention discloses a shield-entry receiving device which is an assembled steel structure with a cavity; the receiving device is hermetically arranged around a shield-entry reservation hole on the space enclosing structure of a foundation pit; a slurry pressurizing pipeline accessing to the cavity is arranged on the receiving device. The invention also discloses an entry construction method by using the shield-entry receiving device. Since the shield-entry receiving device is provided with the sealed cavity, after adding water, slurry or compressed air into the cavity by the slurry pressurizing pipeline, pressure environment, the pressure of which is balanced with that of outside water and soil is formed in the receiving device during the shield entry. Therefore, the application of the shield-entry receiving device and the method thereof for the shield-entry construction has the advantages of lowering cost, reducing safety hazards and realizing the quick and safe entry of the shield, and the shield-entry receiving device and the method thereof can be applied to the construction of the shield of large tunnels.

Description

Technical field: [0001] The invention relates to a device and method for shield tunnel construction, in particular to a shield tunnel entry receiving device and a construction method thereof, belonging to the field of tunnel construction engineering. Background technique: [0002] In shield tunnel construction, when the shield machine excavates the foundation pit adjacent to the receiving shaft, it is necessary to prepare for the construction of receiving the shield tunnel. On the enclosure structure of the receiving foundation pit, there is usually a closed reserved hole ring for shield tunneling, and a steel or concrete receiving base is set under the reserved hole ring, and the shield machine will move when entering the hole. Enter the receiving foundation pit from the reserved hole circle after removing the sealed door to reach the receiving base. The construction of the entrance and exit holes of the shield machine should ensure the stability of the soil around the hol...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of high technical difficulty, high cost and many potential safety hazards of shield tunneling in the existing shield tunnel construction, and provide a shield tunneling receiving device and its construction method. It is no longer necessary to reinforce the soil outside the retaining structure of the receiving foundation pit and dewater the ground, thereby greatly reducing costs, and at the same time avoiding muddy water leakage to reduce engineering safety hazards and realize fast and safe entry of the shield tunnel

Images