A top-down shaft construction system and method

Abstract

The invention discloses a vertical shaft construction system from top to bottom, which comprises an inner cylinder body, a cutter head assembly, a muddy water circulation device, and a device fixed on the inner wall of the inner cylinder body and in contact with the outer peripheral surface of the end of the muddy water circulation device near the cutter head assembly. The spacer is fixed so that a closed mud water bin is formed between the fixed spacer and the ground to be excavated. The mud water circulation device includes a slurry inlet pipe and a slurry discharge pipe. When the cutter head assembly is fed, the mud water bin is compressed, and the mud water bin has pressure, so that the cutter head assembly can excavate the ground to be excavated under pressure. After the muddy water is input into the slurry feeding pipeline, the muddy water in the muddy water tank is mixed with the soil slag cut by the cutterhead assembly, and the formed mixture is discharged from the slurry discharge pipeline under the pressure of the muddy water tank. The pressurized feed of the cutterhead assembly can effectively ensure the stability of the ground to be excavated, thereby reducing the disturbance of the soil layer around the excavated ground by the cutterhead assembly, and reducing the construction risk, which is conducive to improving the safety of shaft construction. The invention also provides a top-down shaft construction method.

Description

technical field [0001] The invention relates to the field of shaft construction, in particular to a top-down shaft construction system and method. Background technique [0002] With the acceleration of urbanization development, the demand for urban rail transit and underground comprehensive pipe corridors is increasing day by day, and the construction of urban rail transit and underground comprehensive pipe corridors usually requires the excavation of vertical shafts to achieve functions such as wire connection or ventilation , making the application of shafts more and more common. [0003] Existing shafts are usually manually excavated from top to bottom, combined with mine support devices to realize shaft support. When construction workers are working in shafts, accidents such as shaft wall collapse are very likely to occur, and the personal safety of construction workers are seriously threatened, so the safety of existing shafts during construction is relatively poor. ...

AI Technical Summary

Problems solved by technology

[0003] Existing shafts are usually manually excavated from top to bottom, combined with mine support devices to realize shaft support. When construction workers are working in shafts, accidents such as shaft wall collapse are very likely to occur, and the personal safety of construction workers are seriously threatened, so the safety of existing shafts during construction is relatively poor

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