Production method of utilizing metro shield soil to prepare and sinter common clay bricks

Abstract

The invention discloses a production method of utilizing metro shield soil to prepare and sinter common clay bricks. The production method includes following steps: S1, performing harmless treatment on shield residue soil to obtain shield dried soil and shield solid residue, and ensuring the shield dried soil after harmless treatment to reach environment-protection standard requirements; S2, performing chemical composition analysis on the shield dried soil, doping the shield solid residue and coal gangue, and well stirring according to a weight ratio to enable mixed raw materials to reach following requirements; S3, pressing the mixed raw materials obtained in the step 2 to form green bricks; S4, putting the green bricks obtained in the step 3 into a kiln for sintering to obtain metro shield residue soil sintered bricks. Quality of the metro shield residue soil sintered bricks completely meets related requirements of GB / T5101-2003 'Sintered Common Bricks'; especially for size deviation and appearance quality, compared with conventional sintered bricks and shale bricks, the metro shield residue soil sintered bricks are flat in surface, free of bending deformation, attractive in appearance and regular in size, superior product rate reaches higher than 95%, and strength can reach 18-25MPa; after a freeze-thaw test, mass loss is less than 1%, and no obvious deformation and scumming occurs.

Description

technical field [0001] The invention relates to the field of subway shield muck treatment, in particular to a production method of using subway shield soil to configure and sinter ordinary clay bricks. Background technique [0002] A large amount of shield muck is produced during the subway construction process, and the shield machine will discharge a large amount of shield muck during tunnel excavation. At the same time, in order to ensure the balance of soil pressure, the soil excavated from the excavation surface is mixed with a certain amount of mineral bentonite (such as clay and montmorillonite pulping) according to the groundwater and soil moisture content, plastic index, particle size, etc. , Surfactants (sodium such as AES), adjusted to a "plastic flow state" in the pressure chamber, so as to be transported to the ground smoothly. Shield slag forms waste soil due to the addition of certain active materials. On the one hand, a large amount of untreated shield muck ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a production method of using subway shield soil to configure sintered ordinary clay bricks, so as to solve the difficult problem of subway shield muck disposal, realize the recycling of resources, and make the shield muck resourceful and harmless Minimize and reduce the emission of solid waste from subway construction

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