Layered washing method for slurry circulation system of slurry balance shield machine

Abstract

The invention discloses a layered flushing method for a slurry circulation system of a slurry balance shield machine. The method comprises the following steps that A, an air cushion cabin is circularly washed by adopting muddy water until no muck is screened; B, a cutterhead center flushing pipeline is connected to a mud discharging pipe flow divider, slurry is fed through the cutterhead center flushing pipeline, a mud feeding pipe set I discharges slurry to carry out layered flushing on slag-carried on a muddy water bin till no residue soil exists in the screening process; C, slurry is fed through a cutterhead center flushing pipeline, a mud feeding pipe set II discharges slurry to carry out layered flushing on slag-carried on the muddy water bin till no residue soil exists in the screening process; D, slurry is fed from a main mud discharging pipe set, and the mud feeding pipe set I and the mud feeding pipe set II discharge slurry at the same time to flush and carry residues in the muddy water bin till no residue soil exists in the screening process; and E, slurry is fed through the mud feeding pipe set I and the mud feeding pipe set II at the same time, slurry is discharged from the main mud discharging pipe set, slag is washed and carried in the muddy water bin till no muck exists through screening, and tunneling is recovered. The method has the beneficial effects that the blocking position of the muddy water bin can be accurately flushed, muddy water circulation is recovered, and shield construction is rapidly recovered.

Description

technical field [0001] The invention relates to a construction method for quickly recovering shield excavation from a mud-water shield machine when a mud-water chamber is blocked, in particular to a layered washing method for a mud-water circulation system of a mud-water balance shield machine, which belongs to the technical field of mud-water shield construction. Background technique [0002] Shield method tunnel construction is widely used in water conservancy and hydropower projects, urban rail transit, and highway tunnel construction. At present, when the slurry tank is blocked during the construction of the mud-water balance shield machine, the slurry circulation system is used to flush the slurry tank and carry slag, that is, the slurry discharge pipe is changed into a slurry inlet pipe and the slurry inlet pipe is changed to The slurry discharge pipe is used to dredge the mud tank. However, due to the unknown position of the slag in the mud tank and the large span of ...

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Problems solved by technology

[0003] In order to overcome the blockage of the muddy water chamber in the existing shield machine, the muddy water circulation system is used to flush the muddy water chamber, which cannot effectively dredge the chamber, which affects the construction progress, prolongs the construction period, and increases the cost of engineering construction. The present invention provides a layered flushing method for mud water circulation system of mud water balance shield machine

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