Processing method for protecting excavation place of shield machine from mudlining

A technology of shield machine and mud formation, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., and can solve the problems of weakening effect, failure to achieve effect, increasing cutterhead torque, etc.

Inactive Publication Date: 2011-05-25
SHENYANG HEAVY MACHINERY GROUP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In this case, filling expensive foam, bentonite and other soil amendments cannot achieve good results. The clay sticks to the cutter, which weakens the excavation effect of the cutter and increases the torque of the cutter head, making the shield Mechanism cannot excavate smoothly

Method used

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  • Processing method for protecting excavation place of shield machine from mudlining
  • Processing method for protecting excavation place of shield machine from mudlining

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Embodiment Construction

[0009] Referring to the accompanying drawings, a method for preventing the formation of mud cakes at the excavation of the shield machine, as the cutter head rotates, the cut muck enters the conical crushing chamber through the hole on the cutter head, and connects with the slurry feeding pipeline 4 The injected slurry is mixed to form high-density slurry, which is transported to the outside of the cave by the slurry discharge pipeline 5; when the shield machine passes through the super-clay stratum, a large amount of hard plastic clay sticks to the cutter head and the cone-shaped broken body, due to the high clay content , resulting in more clay sticking to the cutter and the cone-shaped broken body, resulting in an increase in the torque of the cutterhead, making it impossible to move forward smoothly, and the shield construction is in trouble; it is used under ultra-clay soil conditions to prevent mud cake formation at the excavation of the shield machine method, when the sh...

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Abstract

The invention discloses a processing method for protecting the excavation place of a shield machine from mudlining, which is applied in the shield machine industry. Residue soil cut along with the rotation of a cutter enters a tapered breaking cabin from an orifice on the cutter and is mixed with seriflux injected via a seriflux inlet pipeline to form high-density mud; when the shield machine passes through a clay stratum, a great quantity of hard-plastic clay is attached to the cutter and a tapered breaking body; because the clay content is high, more clay is attached on the cutter and the tapered breaking body, and the shield construction is in trouble; when the shield machine meets the super clay stratum, high-pressure water is injected to an excavation cabin by a high-pressure nozzle installed on a front shield; a high-pressure water pump adopts a plunger water pump; a high-pressure water pipe is composed of a seamless steel pipe and a high-pressure hose; the high-pressure nozzle is installed on the lower part of the breaking wall of the front shield of the shield machine to shunt and inject high-pressure water into different positions of the shield machine; and certain high-pressure water is injected to the back of the cutter to clean clay attached on the cutter. The device effectively solves the construction difficulties that clay is attached on the cutter, the torsion of the cutter is added and the like when the shield machine meets the geological condition of super clay, and the processing method has low cost.

Description

technical field [0001] The invention relates to a method for preventing mud cake formation at the excavation place of a shield machine. Background technique [0002] At present, under the superclay geological conditions, that is, the clay content is high, the plasticity index is large, and it is hard plastic clay. In this case, filling expensive foam, bentonite and other soil amendments cannot achieve good results. The clay sticks to the cutter, which weakens the excavation effect of the cutter and increases the torque of the cutter head, making the shield The mechanism cannot excavate smoothly. The method for preventing the formation of mud cake at the excavation place of the shield machine provided by the present invention just provides a perfect solution for such construction conditions. Contents of the invention [0003] The purpose of the present invention is to provide a method for preventing the formation of mud cake at the excavation of the shield machine under t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/08E21D9/087
Inventor 张瑞临范宜韩佳霖王启明
Owner SHENYANG HEAVY MACHINERY GROUP
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