Slurry pressurized shield construction method and construction equipment for mesh cutter head

Abstract

The invention relates to a construction method for a muddy water pressurization shield of a grid knife flywheel and equipment thereof. The construction method provided by the invention comprises the following steps: a shield knife flywheel is in a grid shape; the dimension of an opening can be adjusted according to geological conditions; a pressure chamber is simultaneously and additionally arranged at the rear of a shield machine grid; after muddy water is filled in the pressure chamber, the pressure of water and soil on an excavating surface are balanced by controlling the pressure of the muddy water; and the pressure of the muddy water in the pressure chamber is controlled through a slurry (or water) inlet pump system and a dredge pump system which are connected with a board of the pressure chamber. The equipment provided by the invention comprises a mud inlet pipe, the pressure chamber, a fixed wing, a grid back stirring wing, an independent drive stirring wing, a front grid, a shield jack, a dredge pipe, a duct piece, a relay pump, the dredge pump, a baffle and a mud inlet pump. The invention has the advantage that the mud-water balance of the excavating surface is realized. The construction method provided by the invention synthesizes the respective advantages of a grid shield and a mud-water shield, thereby solving the realistic problem that the grid shield cannot effectively control the stability of the excavating surface.

Description

technical field [0001] The invention relates to a muddy water pressurized shield construction method and construction equipment for a grid cutter head, which is suitable for soft cohesive soil layers with high plastic flow and no self-supporting properties, and can better maintain the excavation surface during construction. The invention relates to stabilizing and controlling strata settlement, belonging to the field of subway and underground engineering construction. Background technique [0002] The grid-type shield is equipped with a front grid on the excavation face, and the forward thrust of the shield is provided by the jack supported on the rear segment, and the soil in front of the excavation face is forced to squeeze into the front grid and flow into the pressure chamber. The support force of the excavation surface in this construction method is provided by two parts: the frontal resistance of the grid and the resistance within the thickness of the grid when the soi...

AI Technical Summary

Problems solved by technology

Therefore, it effectively solves the problems that the stability of the excavation surface cannot be well controlled, the surface settlement or uplift is large, and the applicable range of the ground is small in the grid shield construction.

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