A treatment method for shield mud cake without opening a position

Abstract

The invention relates to a treatment method for shield agglomerated mud cakes without bin opening. The treatment method comprises the specific steps that a reasonable shut down position is determined,and the airtightness of a soil bin is checked; then through a soil-air replacement method of slag soil in the soil bin, the solid soil content in the soil bin is decreased, and a soil bin semi air pressure balance mode is established to stabilize the cutter tunnel surface; then dispersing agents are injected into the soil bin and a cutter to be soaked; the dispersing agents permeate into slime micelles to decompose to enable the mud cakes wrapped on the cutter and the soil bin wall to fall off; and along with rotation of the cutter for stirring, the mud cakes in the soil bin are fully uniformly soaked, stirred and disturbed and fall off, so that the slag soil structure of the soil bin is improved, and the problem that the mud cakes are agglomerated on the cutter is effectively solved. Thebin does not need to be opened, people also do not need to enter the bin, the cost is greatly saved, the construction period is greatly shortened, the risk of bin opening is quickly and effectively avoided, and good social and economic benefits are generated from all aspects of the construction period, the cost and safety.

Description

technical field [0001] The invention relates to the field of tunnel construction by shield tunneling method, in particular to a method for processing shield tunnel mud cake without opening a warehouse. Background technique [0002] During the construction of shield tunneling in clay or silty soil, clay particles are easy to attach to the cutterhead under high-pressure environment, and the thicker the leap, the cutterhead will be stuck, the cutter cannot continue to cut the soil, and the soil cannot Smooth access to the soil silo, leading to shield tunneling construction. [0003] There are basically two methods for pre-processing the mud cake on the cutter head: ① open the ground to break it; from the ground construction shaft to the cutter head position, and then directly go down to the cutter head position, according to the strength and area of ​​the mud cake, use air picks, etc. The machine tool is manually broken. ②Demolition with pressure into the bin; the implementat...

AI Technical Summary

Problems solved by technology

[0004] Both of the above two methods require special reinforcement and treatment of the front face soil, which requires a large investment; at the same time, the existing methods require manual entry into the soil bin to manually break the mud cake, which is extremely risky

Especially under water-rich geological conditions, the investment and risk of existing measures to deal with mudcake will increase exponentially

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