A kind of slag discharge method of shield machine

Abstract

The invention discloses a shield machine slag discharging method. The method comprises a slagging step 1) in which slag cut by a cutter is conveyed to a soil storehouse of a shield machine; a separation step 2) in which gravel and slurry of the slag in the soil storehouse are separated; and a slag discharging step 3) in which the separated slurry is discharged through a slurry discharging pipe of the shield machine and the separated gravel is discharged through a gravel discharging device. By employing the method, the construction efficiency is improved, and the safety and stability of a slag discharging system are improved.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a slag discharge method of the shield machine. Background technique [0002] At present, 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-grained 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 method of slag discharge Satisfactory results cannot be achieved in terms of gravel crushing and pipeline slag carrying. Specifically, the existing mud-water balance shield needs to crush the slag first, and then discharge the broken slag through the mud discharge pipeline. Due to the limited crush...

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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 method of slag discharge Unable to achieve satisfactory results in gravel crushing, pipeline slag carrying, etc.

Specifically, the existing mud-water balance shield needs to crush the slag first, and then discharge the broken slag through the mud discharge pipeline. Due to the limited crushing capacity of the shield machine, the slag entering the soil bin of the shield machine within a unit time The soil should not be too much, the speed of the shield machine is limited, resulting in low construction efficiency and slow construction progress of the shield machine; and the gravel produced by the crushing of large-sized pebbles will cause wear and tear on the mud pump and mud-water circulation pipes, requiring equipment maintenance. The cost is high, and at the same time, pipeline deposits will have an impact on the mud system, affecting the stability of slag carrying

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

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