Intelligent mud spraying prevention system in excavation process of soil pressure shield machine

Abstract

The invention discloses an intelligent mud spraying prevention system in the excavation process of a soil pressure shield machine, which is applied to a shield machine, wherein a spiral conveyor pumpsslag soil in a shield machine soil bin to convey to the outside, an opening is arranged in a cylinder body of the spiral conveyor, and a grid is arranged at the opening for limiting the grain size ofthe slag soil passing through the opening; a slurry pump extracts the liquid part in the slag soil in the spiral conveyor through the opening so as to prevent the slurry from spraying and convey thecollected slurry back to the soil bin of the shield machine for recycling. The intelligent mud spraying prevention system in the excavation process of the soil pressure shield machine can thoroughly solve the problem of slag spraying of the screw conveyor, can further optimize the slag and soil improvement effect in the soil bin, and saves the dosage of the modifier.

Description

technical field [0001] The invention relates to the field of mud gushing prevention during the excavation process of an earth pressure shield machine. More specifically, the present invention relates to an intelligent mud gushing prevention system during the excavation process of an earth pressure shield machine. Background technique [0002] When the earth pressure balance shield machine excavates in strong water-permeable formations, a large amount of pressurized groundwater and muck modifier are usually mixed in the muck in the soil bin and screw conveyor. When the excavation gate of the screw conveyor is opened to discharge the slag, the mud mixed with groundwater and slag soil modifier is instantly sprayed out in large quantities under the action of pressure, that is, gushes, causing the pressure of the shield silo to drop suddenly and the excavation surface to become unstable and collapse. , abnormal ground subsidence, and a series of adverse events such as the overfl...

AI Technical Summary

Problems solved by technology

When the excavation gate of the screw conveyor is opened to discharge the slag, the mud mixed with groundwater and slag soil modifier is instantly sprayed out in large quantities under the action of pressure, that is, gushes, causing the pressure of the shield silo to drop suddenly and the excavation surface to become unstable and collapse. , abnormal ground subsidence, and a series of adverse events such as the overflow of mud in the tunnel, the failure of normal slag discharge, damage to electrical components, and deterioration of the working environment.

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