CN115784712A - Subway shield muck baked brick and production method thereof - Google Patents
Subway shield muck baked brick and production method thereof Download PDFInfo
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- CN115784712A CN115784712A CN202211412621.1A CN202211412621A CN115784712A CN 115784712 A CN115784712 A CN 115784712A CN 202211412621 A CN202211412621 A CN 202211412621A CN 115784712 A CN115784712 A CN 115784712A
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Abstract
The invention discloses a subway shield muck baked brick and a production method thereof, wherein the method comprises the steps of putting shield dry soil into a stirrer for stirring, adding a modifier during stirring to obtain modified shield dry soil, then putting ground shield solid slag, coal gangue and lime macadam into the stirrer simultaneously, adding water for uniform mixing and stirring to obtain a mixed material, putting the stirred mixed material into a flattening mill, flattening the mixed material into a cake shape through a roll shaft of the flattening mill along with the conveying of the mixed material, and taking out air existing in the mixed material. According to the subway shield muck baked brick and the production method, the hardness of the baked brick is improved by three different modes of lime macadam, modifier and vacuum treatment, so that the baked brick has stronger practicability.
Description
Technical Field
The invention relates to the technical field of subway shield muck treatment, in particular to a subway shield muck baked brick and a production method thereof.
Background
The shield machine discharges a large amount of shield muck in the construction process of excavating tunnels, the discharged shield muck contains a large amount of water and surfactant and has high fluidity, and if the shield machine directly enters a receiving field without harmless treatment, the shield muck not only has adverse effects on the surrounding water and soil environment, but also possibly causes geological disasters such as landslide and the like, and threatens the safety of lives and properties of people, so the fluid shield muck with high water content can be poured and molded like concrete under the condition of no dehydration to prepare clay baking-free building blocks with various shapes, and through tests, the compression strength of the standard bricks can reach 20 MPa, the water soaking 4-day softening coefficient is above 0.9, which is equivalent to that of the traditional baked bricks, although other components cannot be added in the process, the formed baked bricks cannot break through 20 MPa, and the strength of the baked bricks cannot be improved, thereby solving the problem of the baked bricks.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a subway shield muck baked brick and a production method thereof, and solves the problem that the formed baked brick cannot break through 20 MPa and cannot improve the strength of the baked brick, so that the baked brick is produced.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the subway shield muck baked brick comprises the following raw materials in parts by weight: 15-20 parts of shield dry soil, 5-8 parts of shield solid slag, 10-12 parts of coal gangue, 3-6 parts of lime macadam and 1-3 parts of modifier.
Preferably, the shield comprises 15 parts of dry soil, 5 parts of shield solid slag, 10 parts of coal gangue, 3 parts of lime macadam and 1 part of modifier.
Preferably, the shield comprises 18 parts of dry soil, 7 parts of shield solid slag, 11 parts of coal gangue, 5 parts of lime macadam and 2 parts of modifier.
Preferably, 20 parts of shield dry soil, 8 parts of shield solid slag, 12 parts of coal gangue, 6 parts of lime macadam and 3 parts of modifier.
Preferably, the modifier is methacrylic sulfonic acid, sodium persulfate and urea according to the mass ratio of 1-1.2: 2-2.5: 0.2 to 0.3:0.1 to 0.2, and reacting in 6 to 9 percent sodium hydroxide solution for 60 to 70min at the temperature of between 50 and 60 ℃.
The invention also discloses a production method of the subway shield muck baked brick, which comprises the following steps:
s1, shield muck treatment: performing harmless treatment on the shield muck to obtain shield dry soil and shield solid slag;
s2, primary crushing of materials: crushing the shield solid slag into blocks with the diameter of less than 1cm in a crusher, and crushing the coal gangue and the lime crushed stone into particles with the diameter of less than 2 cm;
s3, fine grinding: transferring the crushed shield solid slag into a ball mill for fine grinding, sieving the finely ground engineering slag soil with a 300-mesh sieve, finely grinding the crushed coal gangue and limestone particles in the ball mill, and sieving with a 400-mesh sieve;
s4, stirring: firstly, putting the shield dry soil into a stirrer for stirring, and adding a modifier during stirring to obtain modified shield dry soil;
s5, mixing: then simultaneously putting the ground shield solid slag, the coal gangue and the lime macadam into a stirrer, and adding water for uniform mixing and stirring to obtain a mixed material;
s6, vacuum treatment: putting the stirred mixed material into a flattening machine, flattening the mixed material into a cake shape through a roller shaft of the flattening machine along with the conveying of the mixed material, and taking out the mixed material with air;
s7, sintering: carrying the mixed material after the step S5 into a brick press, and making green bricks by the brick press;
s8, finished product: and collecting the green bricks and drying to obtain the sintered bricks.
Preferably, the modified shield dry soil needs to be placed for 1-2 days before use.
Preferably, in the step S1, the water content and the plasticity index Ip of the shield dry soil are reduced by a natural spreading and airing manner, so that the water content of the shield dry soil is controlled to be 12-14%.
Preferably, the stirring time in the step S3 is 10-15min.
Preferably, the mixing and stirring time in the step S4 is 15-20min.
(III) advantageous effects
The invention provides a subway shield muck baked brick and a production method thereof. Compared with the prior art, the method has the following beneficial effects:
(1) The main reason for improving the strength of the baked bricks by adding lime crushed stones in the manufacturing of the baked bricks by the shield slag soil is that the ion exchange reaction in lime and soil are subjected to chemical reaction, so that the soil surface is hardened, the modifier is used for improving the strength and the quality of the baked bricks after the dried soil of the shield is changed and the dried soil of the latter shield is dried, and finally, the mixed material is extruded by a flattening machine in the reproduction method, so that the air of the mixed material is removed, the green bricks can have strong hardness, the plasticity is not needed during production, the hardness of the baked bricks is improved by three different modes of lime crushed stones, the modifier and vacuum treatment, and the practical performance of the baked bricks is stronger.
(2) According to the subway shield muck baked brick and the production method, the internal air is taken out through vacuum treatment, the space formed by the air cannot exist in the internal structure of the formed baked brick, and the phenomenon that the surface of the baked brick cracks in production is avoided.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to FIG. 1
Example 1
The invention provides a technical scheme that: the subway shield muck baked brick comprises the following raw materials in parts by weight: 15 parts of shield dry soil, 5 parts of shield solid slag, 10 parts of coal gangue, 3 parts of lime macadam and 1 part of modifier.
The modifier is prepared from methacrylic sulfonic acid, sodium persulfate and urea according to the mass ratio of 1-1.2: 2-2.5: 0.2 to 0.3:0.1 to 0.2, and reacting in 6 to 9 percent sodium hydroxide solution for 60 to 70min at the temperature of between 50 and 60 ℃.
The invention provides a technical scheme that: a production method of a subway shield muck baked brick comprises the following steps:
s1, shield muck treatment: performing harmless treatment on the shield muck to obtain shield dry soil and shield solid slag;
s2, primary crushing of materials: crushing the shield solid slag into blocks with the diameter of less than 1cm in a crusher, and crushing the coal gangue and the lime crushed stone into particles with the diameter of less than 2 cm;
s3, fine grinding: transferring the crushed shield solid slag into a ball mill for fine grinding, sieving the finely ground engineering slag soil with a 300-mesh sieve, finely grinding the crushed coal gangue and limestone particles in the ball mill, and sieving with a 400-mesh sieve;
s4, stirring: firstly, putting the shield dry soil into a stirrer for stirring;
s5, mixing: then simultaneously putting the ground shield solid slag, the coal gangue and the lime macadam into a stirrer, and adding water for uniform mixing and stirring to obtain a mixed material;
s6, green brick manufacturing: carrying the mixed material after the step S5 into a brick press, and making green bricks by the brick press;
s7, finished product: and collecting the green bricks and drying to obtain the sintered bricks.
Further, the modified shield dry soil needs to be placed for 1-2 days before use.
Further, in the step S1, the moisture content and the plasticity index Ip of the shield dry soil are reduced by using a natural spreading and airing mode, so that the moisture content of the shield dry soil is controlled to be 12-14%.
Further, the stirring time in the step S3 is 10-15min.
Further, the mixing and stirring time in the step S4 is 10-15min.
Example 2
The invention provides a technical scheme that: the subway shield muck baked brick comprises the following raw materials in parts by weight: 18 parts of shield dry soil, 7 parts of shield solid slag, 11 parts of coal gangue, 5 parts of lime macadam and 2 parts of modifier.
The modifier is methacrylic sulfonic acid, sodium persulfate and urea according to the mass ratio of 1-1.2: 2-2.5: 0.2 to 0.3:0.1 to 0.2, and reacting in 6 to 9 percent sodium hydroxide solution for 60 to 70min at the temperature of between 50 and 60 ℃.
The invention provides a technical scheme that: a production method of a subway shield muck baked brick comprises the following steps:
s1, shield muck treatment: performing harmless treatment on the shield muck to obtain shield dry soil and shield solid slag;
s2, primary crushing of materials: crushing the shield solid slag into blocks with the diameter of less than 1cm in a crusher, and crushing the coal gangue and the lime crushed stone into particles with the diameter of less than 2 cm;
s3, fine grinding: transferring the crushed shield solid slag into a ball mill for fine grinding, sieving the finely ground engineering slag soil with a 300-mesh sieve, finely grinding the crushed coal gangue and limestone particles in the ball mill, and sieving with a 400-mesh sieve;
s4, stirring: firstly, putting the shield dry soil into a stirrer for stirring, and adding a modifier during stirring to obtain modified shield dry soil;
s5, mixing: then simultaneously putting the ground shield solid slag, the coal gangue and the lime macadam into a stirrer, and adding water for uniform mixing and stirring to obtain a mixed material;
s6, green brick manufacturing: carrying the mixed material after the step S5 into a brick press, and making green bricks by the brick press;
s7, finished product: and collecting the green bricks and drying to obtain the sintered bricks.
Further, the modified shield dry soil needs to be placed for 1-2 days before use.
Further, in the step S1, the water content and the plasticity index Ip of the shield dry soil are reduced by a natural spreading and airing mode, so that the water content of the shield dry soil is controlled to be 12-14%.
Further, the stirring time in the step S3 is 10-15min.
Further, the mixing and stirring time in the step S4 is 10-15min.
Example 3
The invention provides a technical scheme that: the subway shield muck baked brick comprises the following raw materials in parts by weight: 20 parts of shield dry soil, 8 parts of shield solid slag, 12 parts of coal gangue, 6 parts of lime macadam and 3 parts of modifier.
The modifier is methacrylic sulfonic acid, sodium persulfate and urea according to the mass ratio of 1-1.2: 2-2.5: 0.2 to 0.3:0.1 to 0.2, and reacting in 6 to 9 percent sodium hydroxide solution for 60 to 70min at the temperature of between 50 and 60 ℃.
The invention provides a technical scheme that: a production method of a subway shield muck baked brick comprises the following steps:
s1, shield muck treatment: performing harmless treatment on the shield muck to obtain shield dry soil and shield solid slag;
s2, primary crushing of materials: crushing the shield solid slag into blocks with the diameter of less than 1cm in a crusher, and crushing the coal gangue and the lime crushed stone into particles with the diameter of less than 2 cm;
s3, fine grinding: transferring the crushed shield solid slag into a ball mill for fine grinding, sieving the finely ground engineering slag soil with a 300-mesh sieve, finely grinding the crushed coal gangue and limestone particles in the ball mill, and sieving with a 400-mesh sieve;
s4, stirring: firstly, putting the shield dry soil into a stirrer for stirring, and adding a modifier during stirring to obtain modified shield dry soil;
s5, mixing: then simultaneously putting the ground shield solid slag, the coal gangue and the lime macadam into a stirrer, and adding water for uniform mixing and stirring to obtain a mixed material;
s6, vacuum treatment: placing the stirred mixed material into a flatting mill, flatting the mixed material into a cake shape through a roll shaft of the flatting mill along with the conveying of the mixed material, and taking out the mixed material with air;
s7, green brick manufacturing: carrying the mixed material after the step S5 into a brick press, and making green bricks by the brick press;
s8, finished product: and collecting the green bricks and drying to obtain the sintered bricks.
Further, the modified shield dry soil needs to be placed for 1-2 days before use.
Further, in the step S1, the moisture content and the plasticity index Ip of the shield dry soil are reduced by using a natural spreading and airing mode, so that the moisture content of the shield dry soil is controlled to be 12-14%.
Further, the stirring time in the step S3 is 10-15min.
Further, the mixing and stirring time in the step S4 is 10-15min.
The following table is the experimental data for the examples;
| examples | Pressure intensity/MPa | Absorption rate/%) | Volume shrinkage/% | Weight loss rate/%) |
| Example 1 | 20-22 | 29.45 | 0.88 | 10.93 |
| Example 2 | 22-25 | 31.05 | 0.94 | 10.73 |
| Example 3 | 25-30 | 31.52 | 1.46 | 12.79 |
From the above table, it can be seen that in example 1, when only lime crushed stone is added, although the strength of the baked brick can be improved, the improved strength is not high, but in example 2, the lime crushed stone and the modifier are added to react and modify the shield dry soil, so that the strength effect is stronger for the addition of only lime crushed stone, and finally, in example 3, the addition of lime crushed stone, the modifier and the vacuum treatment in the production process improve the strength by three different treatment modes.
The main reason why the lime macadam is used for improving the strength of the baked brick is that the ion exchange reaction in the lime reacts with soil chemically to harden the surface of the soil, the modifier improves the strength and quality of the baked brick after the shield drying soil is dried after the shield drying soil is changed, and finally the mixed material is extruded by a flatting mill in the reproduction method to remove the air in the mixed material, so that the internal structure of the formed baked brick does not have a space formed by the air, the surface cracking phenomenon of the baked brick in production is avoided, the baked brick can have strong hardness, the plasticity is not needed in production, the hardness of the baked brick is improved by three different modes of lime macadam, the modifier and vacuum treatment, and the practical performance of the baked brick is stronger.
And those not described in detail in this specification are well within the skill of those in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The subway shield muck baked brick is characterized by comprising the following raw materials in parts by weight: 15-20 parts of shield dry soil, 5-8 parts of shield solid slag, 10-12 parts of coal gangue, 3-6 parts of lime macadam and 1-3 parts of modifier.
2. The subway shield muck baked brick as claimed in claim 1, wherein: 15 parts of shield dry soil, 5 parts of shield solid slag, 10 parts of coal gangue, 3 parts of lime macadam and 1 part of modifier.
3. The subway shield muck baked brick as claimed in claim 1, wherein: 18 parts of shield dry soil, 7 parts of shield solid slag, 11 parts of coal gangue, 5 parts of lime macadam and 2 parts of modifier.
4. The subway shield muck baked brick as claimed in claim 1, wherein: 20 parts of shield dry soil, 8 parts of shield solid slag, 12 parts of coal gangue, 6 parts of lime macadam and 3 parts of modifier.
5. The subway shield muck baked brick as claimed in claim 1, wherein: the modifier is methacrylic sulfonic acid, sodium persulfate and urea according to the mass ratio of 1-1.2: 2-2.5: 0.2 to 0.3:0.1 to 0.2, and reacting in 6 to 9 percent sodium hydroxide solution for 60 to 70min at the temperature of between 50 and 60 ℃.
6. The method for producing the subway shield muck baked brick as claimed in any one of claims 1 to 4, wherein: the method comprises the following steps:
s1, shield muck treatment: performing innocent treatment on the shield muck to obtain shield dry soil and shield solid slag;
s2, primary crushing of materials: crushing the shield solid slag into blocks with the diameter of less than 1cm in a crusher, and crushing the coal gangue and the lime crushed stone into particles with the diameter of less than 2 cm;
s3, fine grinding: transferring the crushed shield solid slag into a ball mill for fine grinding, sieving engineering muck subjected to fine grinding by using a 300-mesh sieve, and finely grinding crushed gangue and limestone particles in the ball mill and sieving by using a 400-mesh sieve;
s4, stirring: firstly, putting the shield dry soil into a stirrer for stirring, and adding a modifier during stirring to obtain modified shield dry soil;
s5, mixing: then simultaneously putting the ground shield solid slag, the coal gangue and the lime macadam into a stirrer, and adding water for uniform mixing and stirring to obtain a mixed material;
s6, vacuum treatment: putting the stirred mixed material into a flattening machine, flattening the mixed material into a cake shape through a roller shaft of the flattening machine along with the conveying of the mixed material, and taking out the mixed material with air;
s7, green brick manufacturing: carrying the mixed material after the step S5 into a brick press, and making green bricks by the brick press;
s8, finished product: and collecting the green bricks and drying to obtain the sintered bricks.
7. The production method of the subway shield muck baked brick as claimed in claim 6, wherein: the modified shield dry soil needs to be placed for 1-2 days before use.
8. The production method of the subway shield muck baked brick as claimed in claim 6, wherein: and in the step S1, the water content and the plasticity index Ip of the shield dry soil are reduced by utilizing a natural spreading and airing mode, so that the water content of the shield dry soil is controlled to be 12-14%.
9. The production method of the subway shield muck baked brick as claimed in claim 6, wherein: and the stirring time in the step S3 is 10-15min.
10. The production method of the subway shield muck baked brick as claimed in claim 6, wherein: and in the step S4, the mixing and stirring time is 10-15min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211412621.1A CN115784712A (en) | 2022-11-11 | 2022-11-11 | Subway shield muck baked brick and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211412621.1A CN115784712A (en) | 2022-11-11 | 2022-11-11 | Subway shield muck baked brick and production method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002140A1 (en) * | 1989-07-31 | 1991-02-21 | Kabushiki Kaisha Komatsu Seisakusho | Closed type shield machine |
| JPH0711887A (en) * | 1993-06-28 | 1995-01-13 | Fujita Corp | Fluidizing method of excavated earth in earth pressure type shielding construction |
| CN107056239A (en) * | 2017-04-26 | 2017-08-18 | 长沙锦佳环保科技有限公司 | A kind of metro shield sintering brick using schist as raw material and production method |
| CN107098634A (en) * | 2017-04-26 | 2017-08-29 | 长沙锦佳环保科技有限公司 | A kind of metro shield dregs is non-burning brick and production method |
| CN110041037A (en) * | 2019-04-28 | 2019-07-23 | 普定县银丰农业科技发展有限公司 | A kind of non-sintered brick and preparation method thereof containing engineering dregs |
| CN114083693A (en) * | 2021-11-30 | 2022-02-25 | 同济大学 | Method for quickly identifying and compounding engineering waste soil |
-
2022
- 2022-11-11 CN CN202211412621.1A patent/CN115784712A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002140A1 (en) * | 1989-07-31 | 1991-02-21 | Kabushiki Kaisha Komatsu Seisakusho | Closed type shield machine |
| JPH0711887A (en) * | 1993-06-28 | 1995-01-13 | Fujita Corp | Fluidizing method of excavated earth in earth pressure type shielding construction |
| CN107056239A (en) * | 2017-04-26 | 2017-08-18 | 长沙锦佳环保科技有限公司 | A kind of metro shield sintering brick using schist as raw material and production method |
| CN107098634A (en) * | 2017-04-26 | 2017-08-29 | 长沙锦佳环保科技有限公司 | A kind of metro shield dregs is non-burning brick and production method |
| CN110041037A (en) * | 2019-04-28 | 2019-07-23 | 普定县银丰农业科技发展有限公司 | A kind of non-sintered brick and preparation method thereof containing engineering dregs |
| CN114083693A (en) * | 2021-11-30 | 2022-02-25 | 同济大学 | Method for quickly identifying and compounding engineering waste soil |
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