Slurry loop circulation system for slurry shield

Abstract

The invention discloses a slurry loop circulation system for slurry shield. The slurry loop circulation system comprises an excavation bin and an air cushion bin, a slurry inlet pump is connected witha main slurry inlet pipeline, the main slurry inlet pipeline communicates with the excavation bin through a plurality of first shunt slurry inlet pipelines, and the lower side of the air cushion bincommunicates with the main slurry inlet pipeline through a plurality of second shunt slurry inlet pipelines; the lower side of the excavation bin communicates with a main slurry discharging pipeline through first shunt slurry discharging pipelines, and the lower side of the air cushion bin communicates with the main slurry discharging pipeline through second shunt slurry discharging pipelines; a first flushing system is connected to the position between a cutterhead panel and the main slurry inlet pipeline, the tops of a stirrer, a slurry door and the excavation bin are connected with a secondflushing system, and the main slurry inlet pipeline communicates with the main slurry discharging pipeline through a by-pass pipeline; and an output end opening of the slurry inlet pump and an inputend opening of a slurry discharging pump are provided with sensors correspondingly, a ball valve and the sensors are connected with a control system, by optimizing the slurry circulation mode, standbypipelines are additionally arranged to improve the treatment efficiency of slurry, and the plugging probability of a slurry outlet is reduced.

Description

technical field [0001] The invention relates to the technical field of mud circulation system in construction, in particular to a mud loop circulation system of a mud-water shield. Background technique [0002] With the continuous development of national subway construction, the use of fast and efficient shield tunneling construction is becoming more and more widespread. Mud-water balance shield is one of the construction methods. It stabilizes the excavation surface by pressurizing muddy water or mud (usually bentonite suspension). On the rear side of the cutter head of the mechanical shield, there is a Seal the partition, press the muddy water made by mixing water, clay and its additives into the muddy water bin through the conveying pipeline, and wait until the muddy water fills the whole muddy water bin with a certain pressure to form a muddy water pressure chamber. The excavated soil material and mud are mixed by The mud pump is transported to the separation plant ou...

AI Technical Summary

Problems solved by technology

[0003] At present, the muddy water shield of the European model that is mostly used in the muddy water shield is equipped with an air cushion chamber. Due to the appearance of the air cushion chamber, the flow rate of the mud at the bottom of the muddy water chamber and the air cushion chamber is low, which is easy to cause the bottom to be blocked, resulting in low work efficiency.

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