A slag discharge mechanism of a shield machine and a mud-water balance shield machine

Abstract

The invention discloses a muddy water balance shield tunneling machine and a slag discharging mechanism thereof. The slag discharging mechanism comprises a mud discharging pipeline and a soil bin for storing residue soil; a separating device for separating mud in the residue soil from gravels is arranged between the soil bin and the mud discharging pipeline; the soil bin communicates with a feeding end of the separating device; a mud discharging end of the separating device communicates with the mud discharging pipeline; and a gravel discharging end of the separating device is provided with a gravel discharging device. The muddy water balance shield tunneling machine comprises a shield and the slag discharging mechanism which is arranged in the shield. The slag discharging mechanism has the advantages that safety and stability of a slag outlet system of the muddy water balance shield tunneling machine are improved, and construction efficiency is also improved.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a slag discharge mechanism of a shield machine and a mud-water balance shield machine. Background technique [0002] The existing mud-water shield construction needs to crush large-sized pebbles into gravels below 100mm, pass through the grid and enter the mud discharge pipe, and complete the muck transportation through the mud discharge pipe. [0003] For the geology of water-rich and large-size pebble-sand interbedded strata represented by Lanzhou and Chengdu, due to the large amount of pebbles and large particle size (the maximum particle size can reach 500mm), the existing mud-water balance shield machine is broken when the gravel is broken. , pipeline slag carrying and other aspects can not achieve satisfactory results. Specifically, due to the limited crushing capacity of the existing mud-water balance shield machine, the amount of muck entering the soil bin of the...

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Problems solved by technology

[0003] For the geology of water-rich and large-size pebble-sand interbedded strata represented by Lanzhou and Chengdu, due to the large amount of pebbles and large particle size (the maximum particle size can reach 500mm), the existing mud-water balance shield machine is broken when the gravel is broken. , pipeline slag carrying and other aspects can not achieve satisfactory results

Specifically, due to the limited crushing capacity of the existing mud-water balance shield machine, the amount of muck entering the soil bin of the shield machine within a unit time cannot be too much, and the advancement speed of the shield machine is limited, resulting in low construction efficiency of the shield machine. The construction progress is slow; and the gravel produced by the crushing of large-sized pebbles will cause wear and tear on the sludge discharge pump and the mud-water circulation pipeline, and the equipment maintenance cost is high. At the same time, pipeline deposition will impact the mud system and affect the stability of slag carrying

It can be seen that the existing mud-water shield machine cannot be applied on a large scale in the geology of water-rich and large-size pebble-sand interbedded formations

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